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Demonstrations of funcgraph, the Linux ftrace version.
I'll start by showing do_nanosleep(), since it's usually a low frequency
function that can be easily triggered (run "vmstat 1"):
# ./funcgraph do_nanosleep
Tracing "do_nanosleep"... Ctrl-C to end.
0) | do_nanosleep() {
0) | hrtimer_start_range_ns() {
0) | __hrtimer_start_range_ns() {
0) | lock_hrtimer_base.isra.24() {
0) 0.198 us | _raw_spin_lock_irqsave();
0) 0.908 us | }
0) 0.061 us | idle_cpu();
0) 0.117 us | ktime_get();
0) 0.371 us | enqueue_hrtimer();
0) 0.075 us | _raw_spin_unlock_irqrestore();
0) 3.447 us | }
0) 3.998 us | }
0) | schedule() {
0) | __schedule() {
0) 0.050 us | rcu_note_context_switch();
0) 0.055 us | _raw_spin_lock_irq();
0) | deactivate_task() {
0) | dequeue_task() {
0) 0.142 us | update_rq_clock();
0) | dequeue_task_fair() {
0) | dequeue_entity() {
0) | update_curr() {
0) 0.086 us | cpuacct_charge();
0) 0.757 us | }
0) 0.052 us | clear_buddies();
0) 0.103 us | update_cfs_load();
0) | update_cfs_shares() {
0) | reweight_entity() {
0) 0.077 us | update_curr();
0) 0.438 us | }
0) 0.794 us | }
0) 3.067 us | }
0) 0.064 us | set_next_buddy();
0) 0.066 us | update_cfs_load();
0) 0.085 us | update_cfs_shares();
0) | hrtick_update() {
0) 0.063 us | hrtick_start_fair();
0) 0.367 us | }
0) 5.188 us | }
0) 5.923 us | }
0) 6.228 us | }
0) | put_prev_task_fair() {
0) 0.078 us | put_prev_entity();
0) | put_prev_entity() {
0) 0.070 us | update_curr();
0) 0.074 us | __enqueue_entity();
0) 0.737 us | }
0) 1.367 us | }
0) | pick_next_task_fair() {
0) | pick_next_entity() {
0) 0.052 us | wakeup_preempt_entity.isra.95();
0) 0.070 us | clear_buddies();
0) 0.676 us | }
0) | set_next_entity() {
0) 0.052 us | update_stats_wait_end();
0) 0.435 us | }
0) | pick_next_entity() {
0) 0.065 us | clear_buddies();
0) 0.376 us | }
0) | set_next_entity() {
0) 0.067 us | update_stats_wait_end();
0) 0.374 us | }
0) 0.051 us | hrtick_start_fair();
0) 3.879 us | }
0) 0.057 us | paravirt_start_context_switch();
0) | xen_load_sp0() {
0) 0.050 us | paravirt_get_lazy_mode();
0) 0.057 us | __xen_mc_entry();
0) 0.056 us | paravirt_get_lazy_mode();
0) 1.441 us | }
0) | xen_load_tls() {
0) 0.049 us | paravirt_get_lazy_mode();
0) 0.051 us | paravirt_get_lazy_mode();
0) | load_TLS_descriptor() {
0) | arbitrary_virt_to_machine() {
0) 0.081 us | __virt_addr_valid();
0) 0.052 us | __phys_addr();
0) 0.084 us | get_phys_to_machine();
0) 1.115 us | }
0) 0.053 us | __xen_mc_entry();
0) 1.744 us | }
0) | load_TLS_descriptor() {
0) | arbitrary_virt_to_machine() {
0) 0.053 us | __virt_addr_valid();
0) 0.056 us | __phys_addr();
0) 0.057 us | get_phys_to_machine();
0) 0.990 us | }
0) 0.053 us | __xen_mc_entry();
0) 1.583 us | } /* load_TLS_descriptor */
0) | load_TLS_descriptor() {
0) | arbitrary_virt_to_machine() {
0) 0.057 us | __virt_addr_valid();
0) 0.051 us | __phys_addr();
0) 0.053 us | get_phys_to_machine();
0) 0.978 us | }
0) 0.052 us | __xen_mc_entry();
0) 1.586 us | }
0) 0.052 us | paravirt_get_lazy_mode();
0) 6.630 us | }
0) | xen_end_context_switch() {
0) 0.666 us | xen_mc_flush();
0) 0.050 us | paravirt_end_context_switch();
0) 1.286 us | }
0) 0.172 us | xen_write_msr_safe();
------------------------------------------
0) platfor-3210 => vmstat-2854
------------------------------------------
0) | do_nanosleep() {
0) | hrtimer_start_range_ns() {
0) | __hrtimer_start_range_ns() {
0) | lock_hrtimer_base.isra.24() {
0) 0.217 us | _raw_spin_lock_irqsave();
0) 0.831 us | }
0) 0.066 us | idle_cpu();
0) 0.123 us | ktime_get();
0) 1.172 us | enqueue_hrtimer();
0) 0.089 us | _raw_spin_unlock_irqrestore();
0) 4.050 us | }
0) 4.523 us | }
[...]
The default output shows the function call graph, including all child kernel
functions, along with the function duration times. These times are printed on
either the return line for the function ("}"), or for leaf functions, on the
same line.
The format of this output is documented in the function graph section of the
kernel source file Documentation/trace/ftrace.txt.
This particular example shows the workings of do_nanosleep, in the first dozen
lines, and then schedule() is called to sleep this thread and run another. The
inner workings of schedule() is included in the output.
This output is great for determining the behavior of a certain kernel function,
and to identify functions that can be studied in more details using other, lower
overhead, tools (eg, funccount(8), functrace(8), kprobe(8)). The overheads
of funcgraph are moderate, since all kernel functions are traced in case
they are executed, then included in the output if they are.
Now, if you want to start understanding the general behavior of the kernel,
without a certain kernel function in mind, you may be better to begin with
CPU stack profiling using perf and generating a flame graph. Such an approach
has low overhead, as you are in control of the frequency of event collection
(eg, gathering CPU stacks at 99 Hertz). For instructions, see:
http://www.brendangregg.com/perf.html#FlameGraphs
On newer Linux kernels, you can use the -m option to limit the function
depth. Eg, 3 levels only:
# ./funcgraph -m 3 do_nanosleep
Tracing "do_nanosleep"... Ctrl-C to end.
1) | do_nanosleep() {
1) | hrtimer_start_range_ns() {
1) 1.115 us | __hrtimer_start_range_ns();
1) 1.919 us | }
1) | schedule() {
1) | __schedule() {
1) 1000131 us | }
1) 11.006 us | xen_evtchn_do_upcall();
1) 1000149 us | }
1) | hrtimer_cancel() {
1) 0.212 us | hrtimer_try_to_cancel();
1) 0.699 us | }
1) 1000154 us | }
Neat.
Now do_sys_open() to 3 levels:
0) | do_sys_open() {
0) | getname() {
0) 0.296 us | getname_flags();
0) 0.768 us | }
0) | get_unused_fd_flags() {
0) 0.397 us | __alloc_fd();
0) 0.827 us | }
0) | do_filp_open() {
0) 4.166 us | path_openat();
0) 4.617 us | }
0) | __fsnotify_parent() {
0) 0.083 us | dget_parent();
0) 0.063 us | dput();
0) 0.883 us | }
0) 0.058 us | fsnotify();
0) | fd_install() {
0) 0.133 us | __fd_install();
0) 0.525 us | }
0) | putname() {
0) 0.198 us | final_putname();
0) 0.512 us | }
0) 10.777 us | }
[...]
I can then pick the highest latency child function, then run funcgraph again
using it as the target.
Without timestamps (-D to elide duration):
# ./funcgraph -Dm 3 do_sys_open
Tracing "do_sys_open"... Ctrl-C to end.
1) do_sys_open() {
1) getname() {
1) getname_flags();
1) }
1) get_unused_fd_flags() {
1) __alloc_fd();
1) }
1) do_filp_open() {
1) path_openat();
1) }
1) __fsnotify_parent();
1) fsnotify();
1) fd_install() {
1) __fd_install();
1) }
1) putname() {
1) final_putname();
1) }
1) }
Beautiful.
I could elide the CPU column as well, but I want to leave it: if it changes
half-way through some output, you know the CPU buffer has switched, and the
output may be shuffled.
For this example, I trace vfs_read() calls by process ID 5363: which is a bash
shell. I also include headers (-H) and absolute timestamps (-t). While
tracing, in that bash shell, I typed the word "hello":
# ./funcgraph -Htp 5363 vfs_read
Tracing "vfs_read" for PID 5363... Ctrl-C to end.
# tracer: function_graph
#
# TIME CPU DURATION FUNCTION CALLS
# | | | | | | | |
7238523.638008 | 0) | finish_task_switch() {
7238523.638012 | 0) | xen_evtchn_do_upcall() {
7238523.638012 | 0) | irq_enter() {
7238523.638013 | 0) 0.153 us | rcu_irq_enter();
7238523.638014 | 0) 1.144 us | }
7238523.638014 | 0) 0.056 us | exit_idle();
7238523.638014 | 0) | __xen_evtchn_do_upcall() {
7238523.638015 | 0) | evtchn_2l_handle_events() {
7238523.638015 | 0) 0.057 us | irq_from_virq();
7238523.638015 | 0) | evtchn_from_irq() {
7238523.638015 | 0) | irq_get_irq_data() {
7238523.638016 | 0) 0.058 us | irq_to_desc();
7238523.638016 | 0) 0.565 us | }
7238523.638016 | 0) 0.966 us | }
7238523.638016 | 0) | get_evtchn_to_irq() {
7238523.638017 | 0) 0.050 us | evtchn_2l_max_channels();
7238523.638017 | 0) 0.386 us | }
7238523.638017 | 0) | generic_handle_irq() {
7238523.638017 | 0) 0.058 us | irq_to_desc();
7238523.638018 | 0) | handle_percpu_irq() {
7238523.638018 | 0) | ack_dynirq() {
7238523.638018 | 0) | evtchn_from_irq() {
7238523.638018 | 0) | irq_get_irq_data() {
7238523.638019 | 0) 0.049 us | irq_to_desc();
7238523.638019 | 0) 0.441 us | }
7238523.638019 | 0) 0.772 us | }
7238523.638019 | 0) 0.049 us | irq_move_irq();
7238523.638020 | 0) 0.060 us | evtchn_2l_clear_pending();
7238523.638020 | 0) 1.810 us | }
7238523.638020 | 0) | handle_irq_event_percpu() {
7238523.638020 | 0) | xen_irq_work_interrupt() {
7238523.638021 | 0) | irq_enter() {
7238523.638021 | 0) 0.056 us | rcu_irq_enter();
7238523.638021 | 0) 0.384 us | }
7238523.638021 | 0) | __wake_up() {
7238523.638022 | 0) 0.059 us | _raw_spin_lock_irqsave();
7238523.638022 | 0) | __wake_up_common() {
7238523.638022 | 0) | autoremove_wake_function() {
7238523.638023 | 0) | default_wake_function() {
7238523.638023 | 0) | try_to_wake_up() {
7238523.638023 | 0) 0.220 us | _raw_spin_lock_irqsave();
7238523.638024 | 0) 0.270 us | task_waking_fair();
7238523.638024 | 0) | select_task_rq_fair() {
7238523.638025 | 0) 0.055 us | source_load();
7238523.638025 | 0) 0.056 us | target_load();
7238523.638025 | 0) 0.060 us | idle_cpu();
7238523.638026 | 0) 0.054 us | cpus_share_cache();
7238523.638026 | 0) 0.083 us | idle_cpu();
7238523.638026 | 0) 2.060 us | }
7238523.638027 | 0) 0.051 us | _raw_spin_lock();
7238523.638027 | 0) | ttwu_do_activate.constprop.124() {
7238523.638027 | 0) | activate_task() {
7238523.638027 | 0) | enqueue_task() {
7238523.638028 | 0) 0.120 us | update_rq_clock();
7238523.638028 | 0) | enqueue_task_fair() {
7238523.638028 | 0) | enqueue_entity() {
7238523.638028 | 0) 0.147 us | update_curr();
7238523.638029 | 0) 0.055 us | __compute_runnable_contrib.part.51();
7238523.638029 | 0) 0.066 us | __update_entity_load_avg_contrib();
7238523.638029 | 0) 0.141 us | update_cfs_rq_blocked_load();
7238523.638030 | 0) 0.068 us | account_entity_enqueue();
7238523.638030 | 0) 0.351 us | update_cfs_shares();
7238523.638031 | 0) 0.053 us | place_entity();
7238523.638031 | 0) 0.082 us | __enqueue_entity();
7238523.638032 | 0) 0.050 us | update_cfs_rq_blocked_load();
7238523.638032 | 0) 3.922 us | }
7238523.638032 | 0) | enqueue_entity() {
7238523.638033 | 0) 0.058 us | update_curr();
7238523.638033 | 0) 0.056 us | __compute_runnable_contrib.part.51();
7238523.638033 | 0) 0.078 us | __update_entity_load_avg_contrib();
7238523.638034 | 0) 0.055 us | update_cfs_rq_blocked_load();
7238523.638034 | 0) 0.064 us | account_entity_enqueue();
7238523.638034 | 0) 0.059 us | update_cfs_shares();
7238523.638035 | 0) 0.050 us | place_entity();
7238523.638036 | 0) 0.057 us | __enqueue_entity();
7238523.638036 | 0) 3.829 us | }
7238523.638037 | 0) 0.057 us | hrtick_update();
7238523.638037 | 0) 8.876 us | }
7238523.638037 | 0) 9.698 us | }
7238523.638037 | 0) 10.113 us | }
7238523.638038 | 0) | ttwu_do_wakeup() {
7238523.638038 | 0) | check_preempt_curr() {
7238523.638038 | 0) | resched_task() {
7238523.638038 | 0) | xen_smp_send_reschedule() {
7238523.638038 | 0) | xen_send_IPI_one() {
7238523.638039 | 0) | notify_remote_via_irq() {
7238523.638039 | 0) | evtchn_from_irq() {
7238523.638039 | 0) | irq_get_irq_data() {
7238523.638039 | 0) 0.051 us | irq_to_desc();
7238523.638039 | 0) 0.518 us | }
7238523.638040 | 0) 0.955 us | }
7238523.638041 | 0) 2.001 us | }
7238523.638041 | 0) 2.391 us | }
7238523.638041 | 0) 2.745 us | }
7238523.638041 | 0) 3.183 us | }
7238523.638042 | 0) 3.663 us | }
7238523.638042 | 0) 4.621 us | }
7238523.638043 | 0) 15.443 us | }
7238523.638043 | 0) 0.067 us | _raw_spin_unlock();
7238523.638043 | 0) 0.167 us | ttwu_stat();
7238523.638044 | 0) 0.087 us | _raw_spin_unlock_irqrestore();
7238523.638044 | 0) 21.447 us | }
7238523.638045 | 0) 21.940 us | }
7238523.638045 | 0) 22.406 us | }
7238523.638045 | 0) 23.071 us | }
7238523.638045 | 0) 0.073 us | _raw_spin_unlock_irqrestore();
7238523.638046 | 0) 24.382 us | }
7238523.638046 | 0) | irq_exit() {
7238523.638047 | 0) 0.085 us | idle_cpu();
7238523.638047 | 0) 0.093 us | rcu_irq_exit();
7238523.638048 | 0) 1.242 us | }
7238523.638048 | 0) 27.410 us | }
7238523.638049 | 0) 0.139 us | add_interrupt_randomness();
7238523.638049 | 0) 0.089 us | note_interrupt();
7238523.638050 | 0) 29.582 us | }
7238523.638050 | 0) 32.112 us | }
7238523.638050 | 0) 32.951 us | }
7238523.638051 | 0) 35.765 us | }
7238523.638051 | 0) 36.170 us | }
7238523.638051 | 0) | irq_exit() {
7238523.638051 | 0) 0.082 us | idle_cpu();
7238523.638052 | 0) 0.071 us | rcu_irq_exit();
7238523.638053 | 0) 1.328 us | }
7238523.638053 | 0) 40.563 us | }
7238523.638054 | 0) | __mmdrop() {
7238523.638054 | 0) | pgd_free() {
7238523.638055 | 0) 0.151 us | _raw_spin_lock();
7238523.638055 | 0) 0.069 us | _raw_spin_unlock();
7238523.638056 | 0) | xen_pgd_free() {
7238523.638056 | 0) 0.067 us | xen_get_user_pgd();
7238523.638057 | 0) | free_pages() {
7238523.638057 | 0) | __free_pages() {
7238523.638057 | 0) | free_hot_cold_page() {
7238523.638058 | 0) 0.080 us | free_pages_prepare();
7238523.638058 | 0) 0.363 us | get_pfnblock_flags_mask();
7238523.638059 | 0) 1.626 us | }
7238523.638059 | 0) 2.317 us | }
7238523.638060 | 0) 2.847 us | }
7238523.638060 | 0) 3.908 us | }
7238523.638060 | 0) | free_pages() {
7238523.638060 | 0) | __free_pages() {
7238523.638061 | 0) | free_hot_cold_page() {
7238523.638061 | 0) 0.083 us | free_pages_prepare();
7238523.638061 | 0) 0.139 us | get_pfnblock_flags_mask();
7238523.638062 | 0) 1.062 us | }
7238523.638062 | 0) 1.534 us | }
7238523.638062 | 0) 2.038 us | }
7238523.638063 | 0) 8.268 us | }
7238523.638064 | 0) 0.160 us | destroy_context();
7238523.638065 | 0) 0.384 us | kmem_cache_free();
7238523.638066 | 0) 11.433 us | }
7238523.638066 | 0) 54.448 us | }
7238523.638066 | 0) 19354026 us | } /* __schedule */
7238523.638067 | 0) 19354026 us | } /* schedule */
7238523.638067 | 0) 19354027 us | } /* schedule_timeout */
7238523.638067 | 0) 0.121 us | down_read();
7238523.638068 | 0) | copy_from_read_buf() {
7238523.638069 | 0) | tty_audit_add_data() {
7238523.638070 | 0) 0.220 us | _raw_spin_lock_irqsave();
7238523.638071 | 0) 0.097 us | _raw_spin_unlock_irqrestore();
7238523.638071 | 0) 0.078 us | _raw_spin_lock_irqsave();
7238523.638072 | 0) 0.077 us | _raw_spin_unlock_irqrestore();
7238523.638072 | 0) 2.795 us | }
7238523.638073 | 0) 4.183 us | }
7238523.638073 | 0) 0.084 us | copy_from_read_buf();
7238523.638074 | 0) 0.078 us | n_tty_set_room();
7238523.638074 | 0) 0.082 us | n_tty_write_wakeup();
7238523.638075 | 0) | __wake_up() {
7238523.638075 | 0) 0.084 us | _raw_spin_lock_irqsave();
7238523.638076 | 0) | __wake_up_common() {
7238523.638076 | 0) 0.095 us | pollwake();
7238523.638077 | 0) 0.819 us | }
7238523.638077 | 0) 0.074 us | _raw_spin_unlock_irqrestore();
7238523.638078 | 0) 2.463 us | }
7238523.638078 | 0) 0.071 us | n_tty_set_room();
7238523.638078 | 0) 0.082 us | up_read();
7238523.638079 | 0) | remove_wait_queue() {
7238523.638079 | 0) 0.082 us | _raw_spin_lock_irqsave();
7238523.638080 | 0) 0.086 us | _raw_spin_unlock_irqrestore();
7238523.638080 | 0) 1.239 us | }
7238523.638081 | 0) 0.142 us | mutex_unlock();
7238523.638081 | 0) 19354047 us | } /* n_tty_read */
7238523.638082 | 0) | tty_ldisc_deref() {
7238523.638082 | 0) 0.064 us | ldsem_up_read();
7238523.638082 | 0) 0.554 us | }
7238523.638083 | 0) 0.074 us | get_seconds();
7238523.638083 | 0) 19354052 us | } /* tty_read */
7238523.638084 | 0) 0.352 us | __fsnotify_parent();
7238523.638085 | 0) 0.178 us | fsnotify();
7238523.638085 | 0) 19354058 us | } /* vfs_read */
7238523.638156 | 0) | vfs_read() {
7238523.638157 | 0) | rw_verify_area() {
7238523.638157 | 0) | security_file_permission() {
7238523.638158 | 0) | apparmor_file_permission() {
7238523.638158 | 0) 0.183 us | common_file_perm();
7238523.638159 | 0) 0.778 us | }
7238523.638159 | 0) 0.081 us | __fsnotify_parent();
7238523.638160 | 0) 0.104 us | fsnotify();
7238523.638160 | 0) 2.662 us | }
7238523.638161 | 0) 3.337 us | }
7238523.638161 | 0) | tty_read() {
7238523.638161 | 0) 0.067 us | tty_paranoia_check();
7238523.638162 | 0) | tty_ldisc_ref_wait() {
7238523.638162 | 0) 0.080 us | } /* ldsem_down_read */
7238523.638163 | 0) 0.637 us | }
7238523.638163 | 0) | n_tty_read() {
7238523.638164 | 0) 0.078 us | _raw_spin_lock_irq();
7238523.638164 | 0) 0.090 us | mutex_lock_interruptible();
7238523.638165 | 0) 0.078 us | down_read();
7238523.638165 | 0) | add_wait_queue() {
7238523.638166 | 0) 0.070 us | _raw_spin_lock_irqsave();
7238523.638166 | 0) 0.084 us | _raw_spin_unlock_irqrestore();
7238523.638167 | 0) 1.111 us | }
7238523.638167 | 0) 0.083 us | tty_hung_up_p();
7238523.638168 | 0) 0.080 us | n_tty_set_room();
7238523.638169 | 0) 0.068 us | up_read();
7238523.638169 | 0) | schedule_timeout() {
7238523.638170 | 0) | schedule() {
7238523.638170 | 0) | __schedule() {
7238523.638171 | 0) 0.078 us | rcu_note_context_switch();
7238523.638171 | 0) 0.081 us | _raw_spin_lock_irq();
7238523.638172 | 0) | deactivate_task() {
7238523.638172 | 0) | dequeue_task() {
7238523.638172 | 0) 0.181 us | update_rq_clock();
7238523.638173 | 0) | dequeue_task_fair() {
7238523.638174 | 0) | dequeue_entity() {
7238523.638174 | 0) | update_curr() {
7238523.638174 | 0) 0.257 us | cpuacct_charge();
7238523.638175 | 0) 0.982 us | }
7238523.638175 | 0) 0.079 us | update_cfs_rq_blocked_load();
7238523.638176 | 0) 0.080 us | clear_buddies();
7238523.638177 | 0) 0.096 us | account_entity_dequeue();
7238523.638177 | 0) | update_cfs_shares() {
7238523.638178 | 0) 0.113 us | update_curr();
7238523.638178 | 0) 0.087 us | account_entity_dequeue();
7238523.638179 | 0) 0.073 us | account_entity_enqueue();
7238523.638179 | 0) 1.948 us | }
7238523.638180 | 0) 5.913 us | }
7238523.638180 | 0) | dequeue_entity() {
7238523.638180 | 0) 0.086 us | update_curr();
7238523.638181 | 0) 0.079 us | update_cfs_rq_blocked_load();
7238523.638182 | 0) 0.076 us | clear_buddies();
7238523.638182 | 0) 0.076 us | account_entity_dequeue();
7238523.638183 | 0) 0.104 us | update_cfs_shares();
7238523.638183 | 0) 3.171 us | }
7238523.638184 | 0) 0.076 us | hrtick_update();
7238523.638184 | 0) 10.785 us | }
7238523.638184 | 0) 12.057 us | }
7238523.638185 | 0) 12.704 us | }
7238523.638185 | 0) | pick_next_task_fair() {
7238523.638185 | 0) 0.074 us | check_cfs_rq_runtime();
7238523.638186 | 0) | pick_next_entity() {
7238523.638186 | 0) 0.067 us | clear_buddies();
7238523.638187 | 0) 0.544 us | }
7238523.638187 | 0) | put_prev_entity() {
7238523.638187 | 0) 0.079 us | check_cfs_rq_runtime();
7238523.638188 | 0) 0.612 us | }
7238523.638188 | 0) | put_prev_entity() {
7238523.638188 | 0) 0.076 us | check_cfs_rq_runtime();
7238523.638189 | 0) 0.618 us | }
7238523.638189 | 0) | set_next_entity() {
7238523.638190 | 0) 0.078 us | update_stats_wait_end();
7238523.638190 | 0) 0.712 us | }
7238523.638190 | 0) 5.023 us | }
7238523.638191 | 0) 0.086 us | paravirt_start_context_switch();
7238523.638192 | 0) 0.070 us | xen_read_cr0();
7238523.638193 | 0) | xen_write_cr0() {
7238523.638193 | 0) 0.085 us | paravirt_get_lazy_mode();
7238523.638194 | 0) 0.085 us | __xen_mc_entry();
7238523.638194 | 0) 0.077 us | paravirt_get_lazy_mode();
7238523.638195 | 0) 1.822 us | }
7238523.638195 | 0) | xen_load_sp0() {
7238523.638195 | 0) 0.074 us | paravirt_get_lazy_mode();
7238523.638196 | 0) 0.085 us | __xen_mc_entry();
7238523.638196 | 0) 0.078 us | paravirt_get_lazy_mode();
7238523.638197 | 0) 1.754 us | }
7238523.638197 | 0) | xen_load_tls() {
7238523.638198 | 0) 0.069 us | paravirt_get_lazy_mode();
7238523.638198 | 0) 0.082 us | paravirt_get_lazy_mode();
7238523.638199 | 0) 0.127 us | load_TLS_descriptor();
7238523.638199 | 0) 0.080 us | load_TLS_descriptor();
7238523.638200 | 0) 0.094 us | load_TLS_descriptor();
7238523.638201 | 0) 0.081 us | paravirt_get_lazy_mode();
7238523.638202 | 0) 4.155 us | }
7238523.638202 | 0) | xen_end_context_switch() {
7238523.638202 | 0) 0.699 us | xen_mc_flush();
7238523.638204 | 0) 0.089 us | paravirt_end_context_switch();
7238523.638204 | 0) 1.915 us | }
7238523.797630 | 0) | finish_task_switch() {
7238523.797634 | 0) | xen_evtchn_do_upcall() {
7238523.797634 | 0) | irq_enter() {
7238523.797634 | 0) 0.134 us | rcu_irq_enter();
7238523.797635 | 0) 0.688 us | }
7238523.797635 | 0) 0.055 us | exit_idle();
7238523.797635 | 0) | __xen_evtchn_do_upcall() {
7238523.797636 | 0) | evtchn_2l_handle_events() {
7238523.797636 | 0) 0.048 us | irq_from_virq();
7238523.797636 | 0) | evtchn_from_irq() {
7238523.797636 | 0) | irq_get_irq_data() {
7238523.797637 | 0) 0.061 us | irq_to_desc();
7238523.797637 | 0) 0.564 us | }
7238523.797637 | 0) 0.954 us | }
7238523.797638 | 0) | get_evtchn_to_irq() {
7238523.797638 | 0) 0.057 us | evtchn_2l_max_channels();
7238523.797638 | 0) 0.409 us | }
7238523.797638 | 0) | generic_handle_irq() {
7238523.797638 | 0) 0.052 us | irq_to_desc();
7238523.797639 | 0) | handle_percpu_irq() {
7238523.797639 | 0) | ack_dynirq() {
7238523.797639 | 0) | evtchn_from_irq() {
7238523.797639 | 0) | irq_get_irq_data() {
7238523.797640 | 0) 0.057 us | irq_to_desc();
7238523.797640 | 0) 0.440 us | }
7238523.797640 | 0) 0.746 us | }
7238523.797640 | 0) 0.056 us | irq_move_irq();
7238523.797641 | 0) 0.058 us | evtchn_2l_clear_pending();
7238523.797641 | 0) 1.729 us | }
7238523.797641 | 0) | handle_irq_event_percpu() {
7238523.797641 | 0) | xen_irq_work_interrupt() {
7238523.797642 | 0) | irq_enter() {
7238523.797642 | 0) 0.053 us | rcu_irq_enter();
7238523.797642 | 0) 0.396 us | }
7238523.797642 | 0) | __wake_up() {
7238523.797643 | 0) 0.053 us | _raw_spin_lock_irqsave();
7238523.797643 | 0) | __wake_up_common() {
7238523.797643 | 0) | autoremove_wake_function() {
7238523.797644 | 0) | default_wake_function() {
7238523.797644 | 0) | try_to_wake_up() {
7238523.797644 | 0) 0.228 us | _raw_spin_lock_irqsave();
7238523.797645 | 0) 0.194 us | task_waking_fair();
7238523.797645 | 0) | select_task_rq_fair() {
7238523.797645 | 0) 0.051 us | source_load();
7238523.797646 | 0) 0.050 us | target_load();
7238523.797646 | 0) 0.067 us | idle_cpu();
7238523.797647 | 0) 0.050 us | cpus_share_cache();
7238523.797647 | 0) 0.068 us | idle_cpu();
7238523.797647 | 0) 1.983 us | }
7238523.797648 | 0) 0.051 us | _raw_spin_lock();
7238523.797648 | 0) | ttwu_do_activate.constprop.124() {
7238523.797648 | 0) | activate_task() {
7238523.797648 | 0) | enqueue_task() {
7238523.797648 | 0) 0.135 us | update_rq_clock();
7238523.797649 | 0) | enqueue_task_fair() {
7238523.797649 | 0) | enqueue_entity() {
7238523.797649 | 0) 0.059 us | update_curr();
7238523.797650 | 0) 0.073 us | __compute_runnable_contrib.part.51();
7238523.797650 | 0) 0.066 us | __update_entity_load_avg_contrib();
7238523.797650 | 0) 0.059 us | update_cfs_rq_blocked_load();
7238523.797651 | 0) 0.064 us | account_entity_enqueue();
7238523.797651 | 0) 0.137 us | update_cfs_shares();
7238523.797651 | 0) 0.054 us | place_entity();
7238523.797652 | 0) 0.074 us | __enqueue_entity();
7238523.797652 | 0) 3.085 us | }
7238523.797652 | 0) | enqueue_entity() {
7238523.797653 | 0) 0.058 us | update_curr();
7238523.797654 | 0) 0.049 us | update_cfs_rq_blocked_load();
7238523.797654 | 0) 0.057 us | account_entity_enqueue();
7238523.797655 | 0) 0.066 us | update_cfs_shares();
7238523.797655 | 0) 0.049 us | place_entity();
7238523.797655 | 0) 0.051 us | __enqueue_entity();
7238523.797656 | 0) 3.432 us | }
7238523.797656 | 0) 0.049 us | hrtick_update();
7238523.797657 | 0) 7.552 us | }
7238523.797657 | 0) 8.414 us | }
7238523.797657 | 0) 8.753 us | }
7238523.797657 | 0) | ttwu_do_wakeup() {
7238523.797657 | 0) | check_preempt_curr() {
7238523.797657 | 0) | resched_task() {
7238523.797658 | 0) | xen_smp_send_reschedule() {
7238523.797658 | 0) | xen_send_IPI_one() {
7238523.797658 | 0) | notify_remote_via_irq() {
7238523.797658 | 0) | evtchn_from_irq() {
7238523.797658 | 0) | irq_get_irq_data() {
7238523.797659 | 0) 0.069 us | irq_to_desc();
7238523.797659 | 0) 0.504 us | }
7238523.797659 | 0) 0.869 us | }
7238523.797660 | 0) 1.940 us | } /* notify_remote_via_irq */
7238523.797660 | 0) 2.319 us | }
7238523.797660 | 0) 2.712 us | }
7238523.797661 | 0) 3.147 us | }
7238523.797661 | 0) 3.625 us | }
7238523.797662 | 0) 4.525 us | }
7238523.797662 | 0) 13.961 us | }
7238523.797662 | 0) 0.069 us | _raw_spin_unlock();
7238523.797663 | 0) 0.168 us | ttwu_stat();
7238523.797663 | 0) 0.076 us | _raw_spin_unlock_irqrestore();
7238523.797664 | 0) 19.821 us | }
7238523.797664 | 0) 20.301 us | }
7238523.797664 | 0) 20.796 us | }
7238523.797664 | 0) 21.367 us | }
7238523.797665 | 0) 0.071 us | _raw_spin_unlock_irqrestore();
7238523.797665 | 0) 22.621 us | }
7238523.797666 | 0) | irq_exit() {
7238523.797666 | 0) 0.085 us | idle_cpu();
7238523.797666 | 0) 0.106 us | rcu_irq_exit();
7238523.797667 | 0) 1.220 us | }
7238523.797667 | 0) 25.712 us | }
7238523.797668 | 0) 0.138 us | add_interrupt_randomness();
7238523.797668 | 0) 0.092 us | note_interrupt();
7238523.797669 | 0) 27.713 us | }
7238523.797669 | 0) 30.163 us | }
7238523.797669 | 0) 31.017 us | }
7238523.797670 | 0) 33.953 us | }
7238523.797670 | 0) 34.384 us | }
7238523.797670 | 0) | irq_exit() {
7238523.797671 | 0) 0.079 us | idle_cpu();
7238523.797671 | 0) 0.072 us | rcu_irq_exit();
7238523.797672 | 0) 1.023 us | }
7238523.797672 | 0) 37.789 us | }
7238523.797672 | 0) 39.298 us | }
7238523.797673 | 0) 159502.1 us | }
7238523.797673 | 0) 159502.8 us | }
7238523.797673 | 0) 159503.5 us | }
7238523.797674 | 0) 0.112 us | down_read();
7238523.797675 | 0) | copy_from_read_buf() {
7238523.797676 | 0) | tty_audit_add_data() {
7238523.797676 | 0) 0.226 us | _raw_spin_lock_irqsave();
7238523.797677 | 0) 0.075 us | _raw_spin_unlock_irqrestore();
7238523.797677 | 0) 0.101 us | _raw_spin_lock_irqsave();
7238523.797678 | 0) 0.068 us | _raw_spin_unlock_irqrestore();
7238523.797679 | 0) 2.656 us | }
7238523.797679 | 0) 3.762 us | }
7238523.797679 | 0) 0.145 us | copy_from_read_buf();
7238523.797680 | 0) 0.068 us | n_tty_set_room();
7238523.797680 | 0) 0.058 us | n_tty_write_wakeup();
7238523.797681 | 0) | __wake_up() {
7238523.797682 | 0) 0.060 us | _raw_spin_lock_irqsave();
7238523.797682 | 0) | __wake_up_common() {
7238523.797683 | 0) 0.083 us | pollwake();
7238523.797683 | 0) 0.739 us | }
7238523.797683 | 0) 0.069 us | _raw_spin_unlock_irqrestore();
7238523.797684 | 0) 2.745 us | }
7238523.797684 | 0) 0.061 us | n_tty_set_room();
7238523.797685 | 0) 0.074 us | up_read();
7238523.797685 | 0) | remove_wait_queue() {
7238523.797685 | 0) 0.075 us | _raw_spin_lock_irqsave();
7238523.797686 | 0) 0.070 us | _raw_spin_unlock_irqrestore();
7238523.797686 | 0) 1.110 us | }
7238523.797687 | 0) 0.146 us | mutex_unlock();
7238523.797687 | 0) 159524.0 us | }
7238523.797688 | 0) | tty_ldisc_deref() {
7238523.797688 | 0) 0.070 us | ldsem_up_read();
7238523.797689 | 0) 0.739 us | }
7238523.797689 | 0) 0.066 us | get_seconds();
7238523.797690 | 0) 159528.3 us | }
7238523.797690 | 0) 0.298 us | __fsnotify_parent();
7238523.797691 | 0) 0.179 us | fsnotify();
7238523.797692 | 0) 159534.6 us | }
7238523.797762 | 0) | vfs_read() {
7238523.797763 | 0) | rw_verify_area() {
7238523.797763 | 0) | security_file_permission() {
7238523.797764 | 0) | apparmor_file_permission() {
7238523.797764 | 0) 0.165 us | common_file_perm();
7238523.797765 | 0) 0.732 us | }
7238523.797765 | 0) 0.081 us | __fsnotify_parent();
7238523.797766 | 0) 0.094 us | fsnotify();
7238523.797766 | 0) 2.711 us | }
7238523.797767 | 0) 3.386 us | }
7238523.797767 | 0) | tty_read() {
7238523.797767 | 0) 0.077 us | tty_paranoia_check();
7238523.797768 | 0) | tty_ldisc_ref_wait() {
7238523.797768 | 0) 0.083 us | ldsem_down_read();
7238523.797769 | 0) 0.686 us | }
7238523.797769 | 0) | n_tty_read() {
7238523.797770 | 0) 0.071 us | _raw_spin_lock_irq();
7238523.797770 | 0) 0.111 us | mutex_lock_interruptible();
7238523.797771 | 0) 0.072 us | down_read();
7238523.797771 | 0) | add_wait_queue() {
7238523.797772 | 0) 0.083 us | _raw_spin_lock_irqsave();
7238523.797772 | 0) 0.085 us | _raw_spin_unlock_irqrestore();
7238523.797773 | 0) 1.124 us | }
7238523.797773 | 0) 0.066 us | tty_hung_up_p();
7238523.797774 | 0) 0.090 us | n_tty_set_room();
7238523.797774 | 0) 0.064 us | up_read();
7238523.797775 | 0) | schedule_timeout() {
7238523.797775 | 0) | schedule() {
7238523.797775 | 0) | __schedule() {
7238523.797776 | 0) 0.083 us | rcu_note_context_switch();
7238523.797776 | 0) 0.078 us | _raw_spin_lock_irq();
7238523.797777 | 0) | deactivate_task() {
7238523.797777 | 0) | dequeue_task() {
7238523.797777 | 0) 0.191 us | update_rq_clock();
7238523.797778 | 0) | dequeue_task_fair() {
7238523.797778 | 0) | dequeue_entity() {
7238523.797779 | 0) | update_curr() {
7238523.797779 | 0) 0.179 us | cpuacct_charge();
7238523.797780 | 0) 0.902 us | }
7238523.797780 | 0) 0.070 us | __update_entity_load_avg_contrib();
7238523.797781 | 0) 0.152 us | update_cfs_rq_blocked_load();
7238523.797781 | 0) 0.073 us | clear_buddies();
7238523.797782 | 0) 0.074 us | account_entity_dequeue();
7238523.797783 | 0) | update_cfs_shares() {
7238523.797783 | 0) 0.111 us | update_curr();
7238523.797783 | 0) 0.082 us | account_entity_dequeue();
7238523.797784 | 0) 0.081 us | account_entity_enqueue();
7238523.797785 | 0) 2.330 us | }
7238523.797785 | 0) 6.633 us | } /* dequeue_entity */
7238523.797786 | 0) | dequeue_entity() {
7238523.797786 | 0) 0.078 us | update_curr();
7238523.797787 | 0) 0.086 us | update_cfs_rq_blocked_load();
7238523.797787 | 0) 0.076 us | clear_buddies();
7238523.797788 | 0) 0.079 us | account_entity_dequeue();
7238523.797789 | 0) 0.074 us | update_cfs_shares();
7238523.797789 | 0) 3.287 us | }
7238523.797789 | 0) 0.074 us | hrtick_update();
7238523.797790 | 0) 11.606 us | }
7238523.797790 | 0) 12.879 us | }
7238523.797790 | 0) 13.406 us | }
7238523.797791 | 0) | pick_next_task_fair() {
7238523.797791 | 0) 0.073 us | check_cfs_rq_runtime();
7238523.797792 | 0) | pick_next_entity() {
7238523.797792 | 0) 0.076 us | clear_buddies();
7238523.797793 | 0) 0.663 us | }
7238523.797793 | 0) | put_prev_entity() {
7238523.797793 | 0) 0.076 us | check_cfs_rq_runtime();
7238523.797794 | 0) 0.598 us | }
7238523.797794 | 0) | put_prev_entity() {
7238523.797794 | 0) 0.078 us | check_cfs_rq_runtime();
7238523.797795 | 0) 0.618 us | }
7238523.797795 | 0) | set_next_entity() {
7238523.797795 | 0) 0.096 us | update_stats_wait_end();
7238523.797796 | 0) 0.738 us | }
7238523.797796 | 0) 5.222 us | }
7238523.797797 | 0) 0.078 us | paravirt_start_context_switch();
7238523.797798 | 0) 0.071 us | xen_read_cr0();
7238523.797799 | 0) | xen_write_cr0() {
7238523.797799 | 0) 0.078 us | paravirt_get_lazy_mode();
7238523.797800 | 0) 0.084 us | __xen_mc_entry();
7238523.797800 | 0) 0.076 us | paravirt_get_lazy_mode();
7238523.797801 | 0) 1.798 us | }
7238523.797801 | 0) | xen_load_sp0() {
7238523.797801 | 0) 0.080 us | paravirt_get_lazy_mode();
7238523.797802 | 0) 0.076 us | __xen_mc_entry();
7238523.797802 | 0) 0.073 us | paravirt_get_lazy_mode();
7238523.797803 | 0) 1.623 us | }
7238523.797803 | 0) | xen_load_tls() {
7238523.797803 | 0) 0.082 us | paravirt_get_lazy_mode();
7238523.797804 | 0) 0.084 us | paravirt_get_lazy_mode();
7238523.797804 | 0) 0.136 us | load_TLS_descriptor();
7238523.797805 | 0) 0.072 us | load_TLS_descriptor();
7238523.797806 | 0) 0.080 us | load_TLS_descriptor();
7238523.797806 | 0) 0.088 us | paravirt_get_lazy_mode();
7238523.797807 | 0) 3.360 us | }
7238523.797807 | 0) | xen_end_context_switch() {
7238523.797807 | 0) 0.601 us | xen_mc_flush();
7238523.797808 | 0) 0.098 us | paravirt_end_context_switch();
7238523.797809 | 0) 1.902 us | }
7238524.005649 | 0) | finish_task_switch() {
7238524.005653 | 0) | xen_evtchn_do_upcall() {
7238524.005653 | 0) | irq_enter() {
7238524.005653 | 0) 0.138 us | rcu_irq_enter();
7238524.005654 | 0) 0.753 us | }
7238524.005654 | 0) 0.056 us | exit_idle();
7238524.005655 | 0) | __xen_evtchn_do_upcall() {
7238524.005655 | 0) | evtchn_2l_handle_events() {
7238524.005655 | 0) 0.057 us | irq_from_virq();
7238524.005656 | 0) | evtchn_from_irq() {
7238524.005656 | 0) | irq_get_irq_data() {
7238524.005656 | 0) 0.050 us | irq_to_desc();
7238524.005656 | 0) 0.499 us | }
7238524.005657 | 0) 0.958 us | }
7238524.005657 | 0) | get_evtchn_to_irq() {
7238524.005657 | 0) 0.057 us | evtchn_2l_max_channels();
7238524.005658 | 0) 0.400 us | }
7238524.005659 | 0) | generic_handle_irq() {
7238524.005659 | 0) 0.052 us | irq_to_desc();
7238524.005659 | 0) | handle_percpu_irq() {
7238524.005659 | 0) | ack_dynirq() {
7238524.005659 | 0) | evtchn_from_irq() {
7238524.005660 | 0) | irq_get_irq_data() {
7238524.005660 | 0) 0.056 us | irq_to_desc();
7238524.005660 | 0) 0.439 us | }
7238524.005660 | 0) 0.739 us | }
7238524.005661 | 0) 0.051 us | irq_move_irq();
7238524.005661 | 0) 0.051 us | evtchn_2l_clear_pending();
7238524.005661 | 0) 1.963 us | }
7238524.005662 | 0) | handle_irq_event_percpu() {
7238524.005662 | 0) | xen_irq_work_interrupt() {
7238524.005662 | 0) | irq_enter() {
7238524.005662 | 0) 0.053 us | rcu_irq_enter();
7238524.005663 | 0) 0.392 us | }
7238524.005663 | 0) | __wake_up() {
7238524.005663 | 0) 0.058 us | _raw_spin_lock_irqsave();
7238524.005664 | 0) | __wake_up_common() {
7238524.005664 | 0) | autoremove_wake_function() {
7238524.005664 | 0) | default_wake_function() {
7238524.005665 | 0) | try_to_wake_up() {
7238524.005665 | 0) 0.226 us | _raw_spin_lock_irqsave();
7238524.005665 | 0) 0.392 us | task_waking_fair();
7238524.005666 | 0) | select_task_rq_fair() {
7238524.005666 | 0) 0.067 us | source_load();
7238524.005667 | 0) 0.057 us | target_load();
7238524.005667 | 0) 0.065 us | idle_cpu();
7238524.005668 | 0) 0.050 us | cpus_share_cache();
7238524.005668 | 0) 0.080 us | idle_cpu();
7238524.005668 | 0) 2.053 us | }
7238524.005669 | 0) 0.051 us | _raw_spin_lock();
7238524.005669 | 0) | ttwu_do_activate.constprop.124() {
7238524.005669 | 0) | activate_task() {
7238524.005669 | 0) | enqueue_task() {
7238524.005669 | 0) 0.165 us | update_rq_clock();
7238524.005670 | 0) | enqueue_task_fair() {
7238524.005670 | 0) | enqueue_entity() {
7238524.005670 | 0) 0.065 us | update_curr();
7238524.005671 | 0) 0.078 us | __compute_runnable_contrib.part.51();
7238524.005671 | 0) 0.070 us | __update_entity_load_avg_contrib();
7238524.005671 | 0) 0.051 us | update_cfs_rq_blocked_load();
7238524.005672 | 0) 0.069 us | account_entity_enqueue();
7238524.005672 | 0) 0.132 us | update_cfs_shares();
7238524.005673 | 0) 0.054 us | place_entity();
7238524.005673 | 0) 0.081 us | __enqueue_entity();
7238524.005673 | 0) 3.111 us | }
7238524.005673 | 0) | enqueue_entity() {
7238524.005674 | 0) 0.059 us | update_curr();
7238524.005674 | 0) 0.057 us | update_cfs_rq_blocked_load();
7238524.005674 | 0) 0.067 us | account_entity_enqueue();
7238524.005675 | 0) 0.082 us | update_cfs_shares();
7238524.005675 | 0) 0.120 us | place_entity();
7238524.005675 | 0) 0.051 us | __enqueue_entity();
7238524.005676 | 0) 2.075 us | }
7238524.005676 | 0) 0.049 us | hrtick_update();
7238524.005676 | 0) 6.167 us | }
7238524.005676 | 0) 6.979 us | }
7238524.005676 | 0) 7.317 us | }
7238524.005677 | 0) | ttwu_do_wakeup() {
7238524.005677 | 0) | check_preempt_curr() {
7238524.005677 | 0) | resched_task() {
7238524.005677 | 0) | xen_smp_send_reschedule() {
7238524.005677 | 0) | xen_send_IPI_one() {
7238524.005678 | 0) | notify_remote_via_irq() {
7238524.005678 | 0) | evtchn_from_irq() {
7238524.005678 | 0) | irq_get_irq_data() {
7238524.005678 | 0) 0.051 us | irq_to_desc();
7238524.005679 | 0) 0.545 us | }
7238524.005679 | 0) 0.910 us | }
7238524.005680 | 0) 1.962 us | } /* notify_remote_via_irq */
7238524.005680 | 0) 2.332 us | }
7238524.005680 | 0) 2.684 us | }
7238524.005681 | 0) 3.606 us | }
7238524.005681 | 0) 4.064 us | }
7238524.005682 | 0) 5.129 us | }
7238524.005682 | 0) 13.194 us | }
7238524.005683 | 0) 0.066 us | _raw_spin_unlock();
7238524.005683 | 0) 0.165 us | ttwu_stat();
7238524.005684 | 0) 0.070 us | _raw_spin_unlock_irqrestore();
7238524.005684 | 0) 19.634 us | }
7238524.005685 | 0) 20.080 us | }
7238524.005685 | 0) 20.608 us | }
7238524.005685 | 0) 21.348 us | }
7238524.005685 | 0) 0.084 us | _raw_spin_unlock_irqrestore();
7238524.005686 | 0) 22.728 us | }
7238524.005686 | 0) | irq_exit() {
7238524.005687 | 0) 0.077 us | idle_cpu();
7238524.005687 | 0) 0.093 us | rcu_irq_exit();
7238524.005688 | 0) 1.101 us | }
7238524.005688 | 0) 25.644 us | }
7238524.005688 | 0) 0.138 us | add_interrupt_randomness();
7238524.005689 | 0) 0.083 us | note_interrupt();
7238524.005689 | 0) 27.672 us | }
7238524.005690 | 0) 30.410 us | }
7238524.005690 | 0) 31.458 us | }
7238524.005690 | 0) 35.276 us | }
7238524.005691 | 0) 35.797 us | }
7238524.005691 | 0) | irq_exit() {
7238524.005691 | 0) 0.066 us | idle_cpu();
7238524.005692 | 0) 0.080 us | rcu_irq_exit();
7238524.005692 | 0) 1.110 us | }
7238524.005693 | 0) 39.440 us | }
7238524.005693 | 0) 41.142 us | }
7238524.005694 | 0) 207918.1 us | }
7238524.005694 | 0) 207918.7 us | }
7238524.005694 | 0) 207919.4 us | }
7238524.005695 | 0) 0.068 us | down_read();
7238524.005696 | 0) | copy_from_read_buf() {
7238524.005697 | 0) | tty_audit_add_data() {
7238524.005697 | 0) 0.233 us | _raw_spin_lock_irqsave();
7238524.005698 | 0) 0.076 us | _raw_spin_unlock_irqrestore();
7238524.005699 | 0) 0.076 us | _raw_spin_lock_irqsave();
7238524.005699 | 0) 0.078 us | _raw_spin_unlock_irqrestore();
7238524.005700 | 0) 2.696 us | }
7238524.005700 | 0) 4.335 us | }
7238524.005701 | 0) 0.086 us | copy_from_read_buf();
7238524.005701 | 0) 0.074 us | n_tty_set_room();
7238524.005702 | 0) 0.085 us | n_tty_write_wakeup();
7238524.005702 | 0) | __wake_up() {
7238524.005703 | 0) 0.061 us | _raw_spin_lock_irqsave();
7238524.005703 | 0) | __wake_up_common() {
7238524.005703 | 0) 0.080 us | pollwake();
7238524.005704 | 0) 0.687 us | }
7238524.005704 | 0) 0.063 us | _raw_spin_unlock_irqrestore();
7238524.005705 | 0) 2.040 us | }
7238524.005705 | 0) 0.071 us | n_tty_set_room();
7238524.005706 | 0) 0.074 us | up_read();
7238524.005706 | 0) | remove_wait_queue() {
7238524.005706 | 0) 0.074 us | _raw_spin_lock_irqsave();
7238524.005707 | 0) 0.069 us | _raw_spin_unlock_irqrestore();
7238524.005707 | 0) 1.076 us | }
7238524.005708 | 0) 0.139 us | mutex_unlock();
7238524.005708 | 0) 207939.0 us | }
7238524.005709 | 0) | tty_ldisc_deref() {
7238524.005709 | 0) 0.077 us | ldsem_up_read();
7238524.005710 | 0) 0.702 us | }
7238524.005710 | 0) 0.068 us | get_seconds();
7238524.005711 | 0) 207943.4 us | }
7238524.005712 | 0) 0.301 us | __fsnotify_parent();
7238524.005713 | 0) 0.157 us | fsnotify();
7238524.005713 | 0) 207950.3 us | }
7238524.005783 | 0) | vfs_read() {
7238524.005784 | 0) | rw_verify_area() {
7238524.005784 | 0) | security_file_permission() {
7238524.005785 | 0) | apparmor_file_permission() {
7238524.005785 | 0) 0.164 us | common_file_perm();
7238524.005786 | 0) 0.790 us | }
7238524.005786 | 0) 0.080 us | __fsnotify_parent();
7238524.005787 | 0) 0.094 us | fsnotify();
7238524.005787 | 0) 2.683 us | }
7238524.005788 | 0) 3.313 us | }
7238524.005788 | 0) | tty_read() {
7238524.005788 | 0) 0.087 us | tty_paranoia_check();
7238524.005789 | 0) | tty_ldisc_ref_wait() {
7238524.005789 | 0) 0.080 us | ldsem_down_read();
7238524.005790 | 0) 0.683 us | }
7238524.005790 | 0) | n_tty_read() {
7238524.005791 | 0) 0.080 us | _raw_spin_lock_irq();
7238524.005791 | 0) 0.104 us | mutex_lock_interruptible();
7238524.005792 | 0) 0.070 us | down_read();
7238524.005792 | 0) | add_wait_queue() {
7238524.005793 | 0) 0.079 us | _raw_spin_lock_irqsave();
7238524.005793 | 0) 0.087 us | _raw_spin_unlock_irqrestore();
7238524.005794 | 0) 1.147 us | }
7238524.005794 | 0) 0.078 us | tty_hung_up_p();
7238524.005795 | 0) 0.071 us | n_tty_set_room();
7238524.005795 | 0) 0.077 us | up_read();
7238524.005796 | 0) | schedule_timeout() {
7238524.005796 | 0) | schedule() {
7238524.005796 | 0) | __schedule() {
7238524.005797 | 0) 0.087 us | rcu_note_context_switch();
7238524.005797 | 0) 0.075 us | _raw_spin_lock_irq();
7238524.005798 | 0) | deactivate_task() {
7238524.005798 | 0) | dequeue_task() {
7238524.005798 | 0) 0.177 us | update_rq_clock();
7238524.005799 | 0) | dequeue_task_fair() {
7238524.005799 | 0) | dequeue_entity() {
7238524.005800 | 0) | update_curr() {
7238524.005800 | 0) 0.334 us | cpuacct_charge();
7238524.005801 | 0) 1.199 us | }
7238524.005802 | 0) 0.081 us | __update_entity_load_avg_contrib();
7238524.005802 | 0) 0.064 us | update_cfs_rq_blocked_load();
7238524.005803 | 0) 0.076 us | clear_buddies();
7238524.005803 | 0) 0.079 us | account_entity_dequeue();
7238524.005804 | 0) | update_cfs_shares() {
7238524.005804 | 0) 0.108 us | update_curr();
7238524.005805 | 0) 0.083 us | account_entity_dequeue();
7238524.005805 | 0) 0.084 us | account_entity_enqueue();
7238524.005806 | 0) 1.869 us | }
7238524.005806 | 0) 6.530 us | } /* dequeue_entity */
7238524.005807 | 0) | dequeue_entity() {
7238524.005807 | 0) 0.104 us | update_curr();
7238524.005808 | 0) 0.115 us | __update_entity_load_avg_contrib();
7238524.005808 | 0) 0.069 us | update_cfs_rq_blocked_load();
7238524.005809 | 0) 0.066 us | clear_buddies();
7238524.005809 | 0) 0.086 us | account_entity_dequeue();
7238524.005810 | 0) 0.102 us | update_cfs_shares();
7238524.005811 | 0) 3.907 us | }
7238524.005811 | 0) 0.071 us | hrtick_update();
7238524.005812 | 0) 12.301 us | }
7238524.005812 | 0) 13.546 us | }
7238524.005812 | 0) 14.105 us | }
7238524.005812 | 0) | pick_next_task_fair() {
7238524.005813 | 0) 0.078 us | check_cfs_rq_runtime();
7238524.005813 | 0) | pick_next_entity() {
7238524.005814 | 0) 0.071 us | clear_buddies();
7238524.005815 | 0) 0.585 us | }
7238524.005815 | 0) | put_prev_entity() {
7238524.005815 | 0) 0.073 us | check_cfs_rq_runtime();
7238524.005816 | 0) 0.717 us | }
7238524.005816 | 0) | put_prev_entity() {
7238524.005817 | 0) 0.080 us | check_cfs_rq_runtime();
7238524.005817 | 0) 0.687 us | }
7238524.005817 | 0) | set_next_entity() {
7238524.005818 | 0) 0.091 us | update_stats_wait_end();
7238524.005818 | 0) 0.786 us | }
7238524.005819 | 0) 6.135 us | }
7238524.005820 | 0) 0.091 us | paravirt_start_context_switch();
7238524.005821 | 0) 0.089 us | xen_read_cr0();
7238524.005821 | 0) | xen_write_cr0() {
7238524.005821 | 0) 0.078 us | paravirt_get_lazy_mode();
7238524.005822 | 0) 0.083 us | __xen_mc_entry();
7238524.005823 | 0) 0.074 us | paravirt_get_lazy_mode();
7238524.005823 | 0) 1.657 us | }
7238524.005823 | 0) | xen_load_sp0() {
7238524.005824 | 0) 0.074 us | paravirt_get_lazy_mode();
7238524.005824 | 0) 0.083 us | __xen_mc_entry();
7238524.005825 | 0) 0.087 us | paravirt_get_lazy_mode();
7238524.005825 | 0) 1.764 us | }
7238524.005826 | 0) | xen_load_tls() {
7238524.005826 | 0) 0.077 us | paravirt_get_lazy_mode();
7238524.005826 | 0) 0.084 us | paravirt_get_lazy_mode();
7238524.005827 | 0) 0.150 us | load_TLS_descriptor();
7238524.005828 | 0) 0.082 us | load_TLS_descriptor();
7238524.005828 | 0) 0.084 us | load_TLS_descriptor();
7238524.005829 | 0) 0.076 us | paravirt_get_lazy_mode();
7238524.005829 | 0) 3.388 us | }
7238524.005829 | 0) | xen_end_context_switch() {
7238524.005830 | 0) 0.731 us | xen_mc_flush();
7238524.005831 | 0) 0.093 us | paravirt_end_context_switch();
7238524.005831 | 0) 1.836 us | }
7238524.141853 | 0) | finish_task_switch() {
7238524.141857 | 0) | xen_evtchn_do_upcall() {
7238524.141858 | 0) | irq_enter() {
7238524.141858 | 0) 0.133 us | rcu_irq_enter();
7238524.141859 | 0) 0.766 us | }
7238524.141859 | 0) 0.056 us | exit_idle();
7238524.141859 | 0) | __xen_evtchn_do_upcall() {
7238524.141859 | 0) | evtchn_2l_handle_events() {
7238524.141860 | 0) 0.049 us | irq_from_virq();
7238524.141860 | 0) | evtchn_from_irq() {
7238524.141860 | 0) | irq_get_irq_data() {
7238524.141860 | 0) 0.058 us | irq_to_desc();
7238524.141861 | 0) 0.498 us | }
7238524.141861 | 0) 0.897 us | }
7238524.141861 | 0) | get_evtchn_to_irq() {
7238524.141861 | 0) 0.049 us | evtchn_2l_max_channels();
7238524.141862 | 0) 0.392 us | }
7238524.141862 | 0) | generic_handle_irq() {
7238524.141862 | 0) 0.061 us | irq_to_desc();
7238524.141862 | 0) | handle_percpu_irq() {
7238524.141863 | 0) | ack_dynirq() {
7238524.141863 | 0) | evtchn_from_irq() {
7238524.141863 | 0) | irq_get_irq_data() {
7238524.141863 | 0) 0.051 us | irq_to_desc();
7238524.141863 | 0) 0.439 us | }
7238524.141864 | 0) 0.745 us | }
7238524.141864 | 0) 0.049 us | irq_move_irq();
7238524.141864 | 0) 0.060 us | evtchn_2l_clear_pending();
7238524.141864 | 0) 1.714 us | }
7238524.141865 | 0) | handle_irq_event_percpu() {
7238524.141865 | 0) | xen_irq_work_interrupt() {
7238524.141865 | 0) | irq_enter() {
7238524.141865 | 0) 0.053 us | rcu_irq_enter();
7238524.141866 | 0) 0.371 us | }
7238524.141866 | 0) | __wake_up() {
7238524.141866 | 0) 0.051 us | _raw_spin_lock_irqsave();
7238524.141867 | 0) | __wake_up_common() {
7238524.141867 | 0) | autoremove_wake_function() {
7238524.141867 | 0) | default_wake_function() {
7238524.141867 | 0) | try_to_wake_up() {
7238524.141868 | 0) 0.213 us | _raw_spin_lock_irqsave();
7238524.141869 | 0) 0.196 us | task_waking_fair();
7238524.141870 | 0) | select_task_rq_fair() {
7238524.141870 | 0) 0.051 us | source_load();
7238524.141870 | 0) 0.049 us | target_load();
7238524.141871 | 0) 0.065 us | idle_cpu();
7238524.141871 | 0) 0.051 us | cpus_share_cache();
7238524.141872 | 0) 0.078 us | idle_cpu();
7238524.141872 | 0) 2.427 us | }
7238524.141873 | 0) 0.050 us | _raw_spin_lock();
7238524.141873 | 0) | ttwu_do_activate.constprop.124() {
7238524.141873 | 0) | activate_task() {
7238524.141873 | 0) | enqueue_task() {
7238524.141873 | 0) 0.170 us | update_rq_clock();
7238524.141874 | 0) | enqueue_task_fair() {
7238524.141874 | 0) | enqueue_entity() {
7238524.141874 | 0) 0.058 us | update_curr();
7238524.141875 | 0) 0.076 us | __compute_runnable_contrib.part.51();
7238524.141875 | 0) 0.059 us | __update_entity_load_avg_contrib();
7238524.141875 | 0) 0.060 us | update_cfs_rq_blocked_load();
7238524.141876 | 0) 0.064 us | account_entity_enqueue();
7238524.141876 | 0) 0.123 us | update_cfs_shares();
7238524.141876 | 0) 0.055 us | place_entity();
7238524.141877 | 0) 0.078 us | __enqueue_entity();
7238524.141877 | 0) 3.039 us | }
7238524.141877 | 0) | enqueue_entity() {
7238524.141877 | 0) 0.065 us | update_curr();
7238524.141878 | 0) 0.050 us | update_cfs_rq_blocked_load();
7238524.141878 | 0) 0.049 us | account_entity_enqueue();
7238524.141878 | 0) 0.081 us | update_cfs_shares();
7238524.141879 | 0) 0.049 us | place_entity();
7238524.141879 | 0) 0.051 us | __enqueue_entity();
7238524.141879 | 0) 2.021 us | }
7238524.141880 | 0) 0.049 us | hrtick_update();
7238524.141880 | 0) 6.040 us | }
7238524.141880 | 0) 6.874 us | }
7238524.141880 | 0) 7.212 us | }
7238524.141880 | 0) | ttwu_do_wakeup() {
7238524.141881 | 0) | check_preempt_curr() {
7238524.141881 | 0) | resched_task() {
7238524.141881 | 0) | xen_smp_send_reschedule() {
7238524.141881 | 0) | xen_send_IPI_one() {
7238524.141881 | 0) | notify_remote_via_irq() {
7238524.141881 | 0) | evtchn_from_irq() {
7238524.141882 | 0) | irq_get_irq_data() {
7238524.141882 | 0) 0.049 us | irq_to_desc();
7238524.141882 | 0) 0.497 us | }
7238524.141882 | 0) 0.860 us | }
7238524.141883 | 0) 1.882 us | } /* notify_remote_via_irq */
7238524.141884 | 0) 2.257 us | }
7238524.141884 | 0) 2.619 us | }
7238524.141884 | 0) 3.079 us | }
7238524.141884 | 0) 3.526 us | }
7238524.141885 | 0) 4.485 us | }
7238524.141885 | 0) 12.333 us | }
7238524.141885 | 0) 0.062 us | _raw_spin_unlock();
7238524.141886 | 0) 0.169 us | ttwu_stat();
7238524.141887 | 0) 0.076 us | _raw_spin_unlock_irqrestore();
7238524.141887 | 0) 19.434 us | }
7238524.141887 | 0) 19.909 us | }
7238524.141888 | 0) 20.377 us | }
7238524.141888 | 0) 21.020 us | }
7238524.141888 | 0) 0.075 us | _raw_spin_unlock_irqrestore();
7238524.141888 | 0) 22.268 us | }
7238524.141889 | 0) | irq_exit() {
7238524.141889 | 0) 0.087 us | idle_cpu();
7238524.141889 | 0) 0.101 us | rcu_irq_exit();
7238524.141890 | 0) 1.127 us | }
7238524.141890 | 0) 25.163 us | }
7238524.141891 | 0) 0.133 us | add_interrupt_randomness();
7238524.141892 | 0) 0.083 us | note_interrupt();
7238524.141892 | 0) 27.453 us | }
7238524.141893 | 0) 30.024 us | }
7238524.141893 | 0) 30.898 us | }
7238524.141893 | 0) 33.683 us | }
7238524.141893 | 0) 34.097 us | }
7238524.141894 | 0) | irq_exit() {
7238524.141894 | 0) 0.065 us | idle_cpu();
7238524.141895 | 0) 0.076 us | rcu_irq_exit();
7238524.141895 | 0) 1.135 us | }
7238524.141895 | 0) 37.746 us | }
7238524.141896 | 0) 39.634 us | }
7238524.141897 | 0) 136100.0 us | }
7238524.141897 | 0) 136100.6 us | }
7238524.141897 | 0) 136101.4 us | }
7238524.141898 | 0) 0.093 us | down_read();
7238524.141899 | 0) | copy_from_read_buf() {
7238524.141900 | 0) | tty_audit_add_data() {
7238524.141900 | 0) 0.238 us | _raw_spin_lock_irqsave();
7238524.141901 | 0) 0.069 us | _raw_spin_unlock_irqrestore();
7238524.141901 | 0) 0.090 us | _raw_spin_lock_irqsave();
7238524.141902 | 0) 0.077 us | _raw_spin_unlock_irqrestore();
7238524.141902 | 0) 2.513 us | }
7238524.141903 | 0) 3.632 us | }
7238524.141903 | 0) 0.085 us | copy_from_read_buf();
7238524.141904 | 0) 0.066 us | n_tty_set_room();
7238524.141905 | 0) 0.067 us | n_tty_write_wakeup();
7238524.141905 | 0) | __wake_up() {
7238524.141906 | 0) 0.070 us | _raw_spin_lock_irqsave();
7238524.141906 | 0) | __wake_up_common() {
7238524.141906 | 0) 0.086 us | pollwake();
7238524.141907 | 0) 0.620 us | }
7238524.141907 | 0) 0.064 us | _raw_spin_unlock_irqrestore();
7238524.141907 | 0) 1.980 us | }
7238524.141908 | 0) 0.059 us | n_tty_set_room();
7238524.141909 | 0) 0.071 us | up_read();
7238524.141909 | 0) | remove_wait_queue() {
7238524.141909 | 0) 0.079 us | _raw_spin_lock_irqsave();
7238524.141910 | 0) 0.082 us | _raw_spin_unlock_irqrestore();
7238524.141910 | 0) 1.164 us | }
7238524.141910 | 0) 0.142 us | mutex_unlock();
7238524.141911 | 0) 136120.9 us | }
7238524.141911 | 0) | tty_ldisc_deref() {
7238524.141912 | 0) 0.062 us | ldsem_up_read();
7238524.141912 | 0) 0.593 us | }
7238524.141912 | 0) 0.079 us | get_seconds();
7238524.141913 | 0) 136125.1 us | }
7238524.141914 | 0) 0.280 us | __fsnotify_parent();
7238524.141915 | 0) 0.187 us | fsnotify();
7238524.141915 | 0) 136131.2 us | }
7238524.141988 | 0) | vfs_read() {
7238524.141989 | 0) | rw_verify_area() {
7238524.141989 | 0) | security_file_permission() {
7238524.141989 | 0) | apparmor_file_permission() {
7238524.141990 | 0) 0.149 us | common_file_perm();
7238524.141990 | 0) 0.774 us | }
7238524.141991 | 0) 0.079 us | __fsnotify_parent();
7238524.141991 | 0) 0.095 us | fsnotify();
7238524.141992 | 0) 2.558 us | }
7238524.141992 | 0) 3.300 us | }
7238524.141993 | 0) | tty_read() {
7238524.141993 | 0) 0.076 us | tty_paranoia_check();
7238524.141994 | 0) | tty_ldisc_ref_wait() {
7238524.141994 | 0) 0.081 us | ldsem_down_read();
7238524.141995 | 0) 0.689 us | }
7238524.141995 | 0) | n_tty_read() {
7238524.141995 | 0) 0.073 us | _raw_spin_lock_irq();
7238524.141996 | 0) 0.110 us | mutex_lock_interruptible();
7238524.141997 | 0) 0.069 us | down_read();
7238524.141998 | 0) | add_wait_queue() {
7238524.141998 | 0) 0.079 us | _raw_spin_lock_irqsave();
7238524.141999 | 0) 0.078 us | _raw_spin_unlock_irqrestore();
7238524.141999 | 0) 1.201 us | }
7238524.142000 | 0) 0.067 us | tty_hung_up_p();
7238524.142000 | 0) 0.078 us | n_tty_set_room();
7238524.142001 | 0) 0.079 us | up_read();
7238524.142001 | 0) | schedule_timeout() {
7238524.142002 | 0) | schedule() {
7238524.142002 | 0) | __schedule() {
7238524.142002 | 0) 0.076 us | rcu_note_context_switch();
7238524.142003 | 0) 0.080 us | _raw_spin_lock_irq();
7238524.142004 | 0) | deactivate_task() {
7238524.142004 | 0) | dequeue_task() {
7238524.142004 | 0) 0.178 us | update_rq_clock();
7238524.142005 | 0) | dequeue_task_fair() {
7238524.142005 | 0) | dequeue_entity() {
7238524.142005 | 0) | update_curr() {
7238524.142006 | 0) 0.263 us | cpuacct_charge();
7238524.142007 | 0) 0.965 us | }
7238524.142007 | 0) 0.075 us | update_cfs_rq_blocked_load();
7238524.142008 | 0) 0.065 us | clear_buddies();
7238524.142008 | 0) 0.084 us | account_entity_dequeue();
7238524.142009 | 0) | update_cfs_shares() {
7238524.142009 | 0) 0.115 us | update_curr();
7238524.142010 | 0) 0.084 us | account_entity_dequeue();
7238524.142010 | 0) 0.068 us | account_entity_enqueue();
7238524.142011 | 0) 1.754 us | }
7238524.142011 | 0) 5.580 us | }
7238524.142012 | 0) | dequeue_entity() {
7238524.142012 | 0) 0.089 us | update_curr();
7238524.142012 | 0) 0.101 us | update_cfs_rq_blocked_load();
7238524.142013 | 0) 0.076 us | clear_buddies();
7238524.142013 | 0) 0.078 us | account_entity_dequeue();
7238524.142014 | 0) 0.076 us | update_cfs_shares();
7238524.142015 | 0) 3.071 us | }
7238524.142015 | 0) 0.078 us | hrtick_update();
7238524.142016 | 0) 10.525 us | }
7238524.142016 | 0) 11.803 us | }
7238524.142016 | 0) 12.447 us | }
7238524.142017 | 0) | pick_next_task_fair() {
7238524.142017 | 0) 0.069 us | check_cfs_rq_runtime();
7238524.142017 | 0) | pick_next_entity() {
7238524.142018 | 0) 0.061 us | clear_buddies();
7238524.142018 | 0) 0.601 us | }
7238524.142019 | 0) | put_prev_entity() {
7238524.142019 | 0) 0.069 us | check_cfs_rq_runtime();
7238524.142019 | 0) 0.605 us | }
7238524.142020 | 0) | put_prev_entity() {
7238524.142020 | 0) 0.076 us | check_cfs_rq_runtime();
7238524.142020 | 0) 0.609 us | }
7238524.142021 | 0) | set_next_entity() {
7238524.142021 | 0) 0.088 us | update_stats_wait_end();
7238524.142022 | 0) 0.768 us | }
7238524.142022 | 0) 5.183 us | }
7238524.142023 | 0) 0.080 us | paravirt_start_context_switch();
7238524.142024 | 0) 0.076 us | xen_read_cr0();
7238524.142024 | 0) | xen_write_cr0() {
7238524.142025 | 0) 0.088 us | paravirt_get_lazy_mode();
7238524.142025 | 0) 0.096 us | __xen_mc_entry();
7238524.142026 | 0) 0.083 us | paravirt_get_lazy_mode();
7238524.142026 | 0) 1.802 us | }
7238524.142026 | 0) | xen_load_sp0() {
7238524.142027 | 0) 0.074 us | paravirt_get_lazy_mode();
7238524.142027 | 0) 0.098 us | __xen_mc_entry();
7238524.142028 | 0) 0.073 us | paravirt_get_lazy_mode();
7238524.142029 | 0) 2.289 us | }
7238524.142029 | 0) | xen_load_tls() {
7238524.142029 | 0) 0.073 us | paravirt_get_lazy_mode();
7238524.142030 | 0) 0.079 us | paravirt_get_lazy_mode();
7238524.142031 | 0) 0.135 us | load_TLS_descriptor();
7238524.142031 | 0) 0.082 us | load_TLS_descriptor();
7238524.142032 | 0) 0.091 us | load_TLS_descriptor();
7238524.142032 | 0) 0.081 us | paravirt_get_lazy_mode();
7238524.142033 | 0) 3.306 us | }
7238524.142033 | 0) | xen_end_context_switch() {
7238524.142033 | 0) 0.697 us | xen_mc_flush();
7238524.142034 | 0) 0.083 us | paravirt_end_context_switch();
7238524.142035 | 0) 1.876 us | }
7238524.269404 | 0) | finish_task_switch() {
7238524.269408 | 0) | xen_evtchn_do_upcall() {
7238524.269408 | 0) | irq_enter() {
7238524.269408 | 0) 0.132 us | rcu_irq_enter();
7238524.269409 | 0) 0.948 us | }
7238524.269409 | 0) 0.063 us | exit_idle();
7238524.269410 | 0) | __xen_evtchn_do_upcall() {
7238524.269410 | 0) | evtchn_2l_handle_events() {
7238524.269410 | 0) 0.057 us | irq_from_virq();
7238524.269411 | 0) | evtchn_from_irq() {
7238524.269411 | 0) | irq_get_irq_data() {
7238524.269411 | 0) 0.058 us | irq_to_desc();
7238524.269412 | 0) 0.579 us | }
7238524.269412 | 0) 0.898 us | }
7238524.269412 | 0) | get_evtchn_to_irq() {
7238524.269412 | 0) 0.049 us | evtchn_2l_max_channels();
7238524.269412 | 0) 0.390 us | }
7238524.269413 | 0) | generic_handle_irq() {
7238524.269413 | 0) 0.051 us | irq_to_desc();
7238524.269413 | 0) | handle_percpu_irq() {
7238524.269413 | 0) | ack_dynirq() {
7238524.269413 | 0) | evtchn_from_irq() {
7238524.269414 | 0) | irq_get_irq_data() {
7238524.269414 | 0) 0.057 us | irq_to_desc();
7238524.269414 | 0) 0.446 us | }
7238524.269414 | 0) 0.754 us | }
7238524.269414 | 0) 0.057 us | irq_move_irq();
7238524.269415 | 0) 0.057 us | evtchn_2l_clear_pending();
7238524.269415 | 0) 1.718 us | }
7238524.269415 | 0) | handle_irq_event_percpu() {
7238524.269416 | 0) | xen_irq_work_interrupt() {
7238524.269416 | 0) | irq_enter() {
7238524.269416 | 0) 0.059 us | rcu_irq_enter();
7238524.269416 | 0) 0.380 us | }
7238524.269417 | 0) | __wake_up() {
7238524.269417 | 0) 0.051 us | _raw_spin_lock_irqsave();
7238524.269417 | 0) | __wake_up_common() {
7238524.269417 | 0) | autoremove_wake_function() {
7238524.269418 | 0) | default_wake_function() {
7238524.269418 | 0) | try_to_wake_up() {
7238524.269418 | 0) 0.230 us | _raw_spin_lock_irqsave();
7238524.269419 | 0) 0.197 us | task_waking_fair();
7238524.269419 | 0) | select_task_rq_fair() {
7238524.269419 | 0) 0.050 us | source_load();
7238524.269420 | 0) 0.057 us | target_load();
7238524.269420 | 0) 0.065 us | idle_cpu();
7238524.269421 | 0) 0.055 us | cpus_share_cache();
7238524.269421 | 0) 0.076 us | idle_cpu();
7238524.269421 | 0) 2.041 us | }
7238524.269422 | 0) 0.050 us | _raw_spin_lock();
7238524.269422 | 0) | ttwu_do_activate.constprop.124() {
7238524.269422 | 0) | activate_task() {
7238524.269422 | 0) | enqueue_task() {
7238524.269422 | 0) 0.175 us | update_rq_clock();
7238524.269423 | 0) | enqueue_task_fair() {
7238524.269423 | 0) | enqueue_entity() {
7238524.269423 | 0) 0.065 us | update_curr();
7238524.269424 | 0) 0.070 us | __compute_runnable_contrib.part.51();
7238524.269424 | 0) 0.052 us | __update_entity_load_avg_contrib();
7238524.269424 | 0) 0.050 us | update_cfs_rq_blocked_load();
7238524.269425 | 0) 0.059 us | account_entity_enqueue();
7238524.269426 | 0) 0.134 us | update_cfs_shares();
7238524.269426 | 0) 0.055 us | place_entity();
7238524.269427 | 0) 0.083 us | __enqueue_entity();
7238524.269427 | 0) 4.026 us | }
7238524.269427 | 0) | enqueue_entity() {
7238524.269428 | 0) 0.065 us | update_curr();
7238524.269428 | 0) 0.051 us | update_cfs_rq_blocked_load();
7238524.269428 | 0) 0.058 us | account_entity_enqueue();
7238524.269429 | 0) 0.082 us | update_cfs_shares();
7238524.269429 | 0) 0.105 us | place_entity();
7238524.269429 | 0) 0.049 us | __enqueue_entity();
7238524.269430 | 0) 2.247 us | }
7238524.269430 | 0) 0.050 us | hrtick_update();
7238524.269430 | 0) 7.310 us | }
7238524.269430 | 0) 8.101 us | }
7238524.269431 | 0) 8.449 us | }
7238524.269431 | 0) | ttwu_do_wakeup() {
7238524.269431 | 0) | check_preempt_curr() {
7238524.269431 | 0) | resched_task() {
7238524.269431 | 0) | xen_smp_send_reschedule() {
7238524.269432 | 0) | xen_send_IPI_one() {
7238524.269432 | 0) | notify_remote_via_irq() {
7238524.269432 | 0) | evtchn_from_irq() {
7238524.269432 | 0) | irq_get_irq_data() {
7238524.269432 | 0) 0.051 us | irq_to_desc();
7238524.269433 | 0) 0.493 us | }
7238524.269433 | 0) 0.857 us | }
7238524.269434 | 0) 1.909 us | } /* notify_remote_via_irq */
7238524.269434 | 0) 2.288 us | }
7238524.269434 | 0) 2.655 us | }
7238524.269434 | 0) 3.127 us | }
7238524.269435 | 0) 3.590 us | }
7238524.269435 | 0) 4.506 us | }
7238524.269436 | 0) 13.594 us | }
7238524.269436 | 0) 0.070 us | _raw_spin_unlock();
7238524.269436 | 0) 0.163 us | ttwu_stat();
7238524.269437 | 0) 0.080 us | _raw_spin_unlock_irqrestore();
7238524.269438 | 0) 19.508 us | }
7238524.269438 | 0) 19.991 us | }
7238524.269438 | 0) 20.486 us | }
7238524.269438 | 0) 21.024 us | }
7238524.269438 | 0) 0.076 us | _raw_spin_unlock_irqrestore();
7238524.269439 | 0) 22.247 us | }
7238524.269439 | 0) | irq_exit() {
7238524.269439 | 0) 0.101 us | idle_cpu();
7238524.269440 | 0) 0.099 us | rcu_irq_exit();
7238524.269441 | 0) 1.207 us | }
7238524.269441 | 0) 25.035 us | }
7238524.269441 | 0) 0.131 us | add_interrupt_randomness();
7238524.269442 | 0) 0.076 us | note_interrupt();
7238524.269442 | 0) 26.909 us | }
7238524.269443 | 0) 29.377 us | }
7238524.269443 | 0) 30.139 us | }
7238524.269443 | 0) 32.759 us | }
7238524.269443 | 0) 33.204 us | }
7238524.269444 | 0) | irq_exit() {
7238524.269444 | 0) | __do_softirq() {
7238524.269444 | 0) 0.068 us | msecs_to_jiffies();
7238524.269445 | 0) | rcu_process_callbacks() {
7238524.269445 | 0) 0.070 us | note_gp_changes();
7238524.269445 | 0) 0.064 us | _raw_spin_lock_irqsave();
7238524.269446 | 0) 0.135 us | rcu_accelerate_cbs();
7238524.269447 | 0) | rcu_report_qs_rnp() {
7238524.269447 | 0) 0.061 us | _raw_spin_unlock_irqrestore();
7238524.269448 | 0) 0.779 us | }
7238524.269448 | 0) 0.081 us | cpu_needs_another_gp();
7238524.269449 | 0) | file_free_rcu() {
7238524.269449 | 0) 0.291 us | kmem_cache_free();
7238524.269450 | 0) 1.139 us | }
7238524.269451 | 0) | put_cred_rcu() {
7238524.269451 | 0) | security_cred_free() {
7238524.269452 | 0) | apparmor_cred_free() {
7238524.269453 | 0) | aa_free_task_context() {
7238524.269453 | 0) | kzfree() {
7238524.269454 | 0) 0.380 us | ksize();
7238524.269455 | 0) 0.147 us | kfree();
7238524.269455 | 0) 1.602 us | }
7238524.269455 | 0) 2.631 us | }
7238524.269456 | 0) 3.611 us | } /* apparmor_cred_free */
7238524.269456 | 0) 4.927 us | }
7238524.269457 | 0) 0.071 us | key_put();
7238524.269457 | 0) 0.071 us | key_put();
7238524.269458 | 0) 0.065 us | key_put();
7238524.269458 | 0) 0.066 us | key_put();
7238524.269459 | 0) 0.390 us | free_uid();
7238524.269460 | 0) 0.178 us | kmem_cache_free();
7238524.269460 | 0) 9.429 us | }
7238524.269461 | 0) 0.099 us | note_gp_changes();
7238524.269461 | 0) 0.080 us | cpu_needs_another_gp();
7238524.269462 | 0) 16.796 us | }
7238524.269462 | 0) 0.068 us | rcu_bh_qs();
7238524.269462 | 0) 0.066 us | __local_bh_enable();
7238524.269463 | 0) 18.770 us | }
7238524.269463 | 0) 0.073 us | idle_cpu();
7238524.269464 | 0) 0.088 us | rcu_irq_exit();
7238524.269464 | 0) 20.487 us | }
7238524.269465 | 0) 56.365 us | }
7238524.269465 | 0) 58.028 us | }
7238524.269466 | 0) 127463.5 us | }
7238524.269466 | 0) 127464.2 us | }
7238524.269467 | 0) 127465.0 us | }
7238524.269467 | 0) 0.095 us | down_read();
7238524.269468 | 0) | copy_from_read_buf() {
7238524.269469 | 0) | tty_audit_add_data() {
7238524.269469 | 0) 0.228 us | _raw_spin_lock_irqsave();
7238524.269470 | 0) 0.070 us | _raw_spin_unlock_irqrestore();
7238524.269471 | 0) 0.074 us | _raw_spin_lock_irqsave();
7238524.269471 | 0) 0.079 us | _raw_spin_unlock_irqrestore();
7238524.269472 | 0) 2.616 us | }
7238524.269472 | 0) 3.878 us | }
7238524.269473 | 0) 0.104 us | copy_from_read_buf();
7238524.269473 | 0) 0.074 us | n_tty_set_room();
7238524.269474 | 0) 0.067 us | n_tty_write_wakeup();
7238524.269474 | 0) | __wake_up() {
7238524.269475 | 0) 0.077 us | _raw_spin_lock_irqsave();
7238524.269475 | 0) | __wake_up_common() {
7238524.269476 | 0) 0.095 us | pollwake();
7238524.269476 | 0) 0.694 us | }
7238524.269476 | 0) 0.064 us | _raw_spin_unlock_irqrestore();
7238524.269477 | 0) 2.128 us | }
7238524.269477 | 0) 0.062 us | n_tty_set_room();
7238524.269477 | 0) 0.066 us | up_read();
7238524.269478 | 0) | remove_wait_queue() {
7238524.269478 | 0) 0.080 us | _raw_spin_lock_irqsave();
7238524.269479 | 0) 0.081 us | _raw_spin_unlock_irqrestore();
7238524.269480 | 0) 1.225 us | }
7238524.269480 | 0) 0.152 us | mutex_unlock();
7238524.269480 | 0) 127485.3 us | }
7238524.269481 | 0) | tty_ldisc_deref() {
7238524.269481 | 0) 0.081 us | ldsem_up_read();
7238524.269482 | 0) 0.655 us | }
7238524.269482 | 0) 0.089 us | get_seconds();
7238524.269483 | 0) 127490.1 us | }
7238524.269484 | 0) 0.287 us | __fsnotify_parent();
7238524.269484 | 0) 0.183 us | fsnotify();
7238524.269485 | 0) 127496.2 us | }
7238524.269559 | 0) | vfs_read() {
7238524.269559 | 0) | rw_verify_area() {
7238524.269560 | 0) | security_file_permission() {
7238524.269560 | 0) | apparmor_file_permission() {
7238524.269561 | 0) 0.164 us | common_file_perm();
7238524.269561 | 0) 0.831 us | }
7238524.269562 | 0) 0.078 us | __fsnotify_parent();
7238524.269562 | 0) 0.080 us | fsnotify();
7238524.269563 | 0) 2.765 us | }
7238524.269563 | 0) 3.490 us | }
7238524.269564 | 0) | tty_read() {
7238524.269564 | 0) 0.066 us | tty_paranoia_check();
7238524.269564 | 0) | tty_ldisc_ref_wait() {
7238524.269565 | 0) 0.085 us | ldsem_down_read();
7238524.269565 | 0) 0.656 us | }
7238524.269566 | 0) | n_tty_read() {
7238524.269566 | 0) 0.078 us | _raw_spin_lock_irq();
7238524.269567 | 0) 0.118 us | mutex_lock_interruptible();
7238524.269567 | 0) 0.078 us | down_read();
7238524.269568 | 0) | add_wait_queue() {
7238524.269568 | 0) 0.089 us | _raw_spin_lock_irqsave();
7238524.269569 | 0) 0.082 us | _raw_spin_unlock_irqrestore();
7238524.269569 | 0) 1.164 us | }
7238524.269570 | 0) 0.073 us | tty_hung_up_p();
7238524.269570 | 0) 0.076 us | n_tty_set_room();
7238524.269571 | 0) 0.078 us | up_read();
7238524.269571 | 0) | schedule_timeout() {
7238524.269572 | 0) | schedule() {
7238524.269572 | 0) | __schedule() {
7238524.269572 | 0) 0.078 us | rcu_note_context_switch();
7238524.269573 | 0) 0.085 us | _raw_spin_lock_irq();
7238524.269574 | 0) | deactivate_task() {
7238524.269574 | 0) | dequeue_task() {
7238524.269574 | 0) 0.185 us | update_rq_clock();
7238524.269575 | 0) | dequeue_task_fair() {
7238524.269575 | 0) | dequeue_entity() {
7238524.269575 | 0) | update_curr() {
7238524.269576 | 0) 0.206 us | cpuacct_charge();
7238524.269577 | 0) 0.937 us | }
7238524.269577 | 0) 0.084 us | __update_entity_load_avg_contrib();
7238524.269577 | 0) 0.077 us | update_cfs_rq_blocked_load();
7238524.269578 | 0) 0.075 us | clear_buddies();
7238524.269579 | 0) 0.096 us | account_entity_dequeue();
7238524.269579 | 0) | update_cfs_shares() {
7238524.269580 | 0) 0.095 us | update_curr();
7238524.269580 | 0) 0.104 us | account_entity_dequeue();
7238524.269581 | 0) 0.076 us | account_entity_enqueue();
7238524.269581 | 0) 1.898 us | }
7238524.269582 | 0) 6.120 us | }
7238524.269582 | 0) | dequeue_entity() {
7238524.269582 | 0) 0.093 us | update_curr();
7238524.269583 | 0) 0.116 us | __update_entity_load_avg_contrib();
7238524.269583 | 0) 0.085 us | update_cfs_rq_blocked_load();
7238524.269584 | 0) 0.067 us | clear_buddies();
7238524.269585 | 0) 0.082 us | account_entity_dequeue();
7238524.269585 | 0) 0.097 us | update_cfs_shares();
7238524.269586 | 0) 3.833 us | }
7238524.269586 | 0) 0.070 us | hrtick_update();
7238524.269587 | 0) 11.677 us | }
7238524.269587 | 0) 13.001 us | }
7238524.269587 | 0) 13.516 us | }
7238524.269588 | 0) | pick_next_task_fair() {
7238524.269588 | 0) 0.072 us | check_cfs_rq_runtime();
7238524.269588 | 0) | pick_next_entity() {
7238524.269589 | 0) 0.080 us | clear_buddies();
7238524.269589 | 0) 0.675 us | }
7238524.269590 | 0) | put_prev_entity() {
7238524.269590 | 0) 0.071 us | check_cfs_rq_runtime();
7238524.269591 | 0) 0.543 us | }
7238524.269591 | 0) | put_prev_entity() {
7238524.269591 | 0) 0.066 us | check_cfs_rq_runtime();
7238524.269592 | 0) 0.658 us | }
7238524.269592 | 0) | set_next_entity() {
7238524.269593 | 0) 0.082 us | update_stats_wait_end();
7238524.269593 | 0) 0.844 us | }
7238524.269594 | 0) 5.970 us | }
7238524.269594 | 0) 0.076 us | paravirt_start_context_switch();
7238524.269595 | 0) 0.074 us | xen_read_cr0();
7238524.269596 | 0) | xen_write_cr0() {
7238524.269597 | 0) 0.081 us | paravirt_get_lazy_mode();
7238524.269597 | 0) 0.086 us | __xen_mc_entry();
7238524.269598 | 0) 0.070 us | paravirt_get_lazy_mode();
7238524.269598 | 0) 1.739 us | }
7238524.269598 | 0) | xen_load_sp0() {
7238524.269599 | 0) 0.078 us | paravirt_get_lazy_mode();
7238524.269599 | 0) 0.078 us | __xen_mc_entry();
7238524.269600 | 0) 0.069 us | paravirt_get_lazy_mode();
7238524.269600 | 0) 1.568 us | }
7238524.269601 | 0) | xen_load_tls() {
7238524.269601 | 0) 0.068 us | paravirt_get_lazy_mode();
7238524.269601 | 0) 0.068 us | paravirt_get_lazy_mode();
7238524.269602 | 0) 0.078 us | load_TLS_descriptor();
7238524.269602 | 0) 0.071 us | load_TLS_descriptor();
7238524.269603 | 0) 0.073 us | load_TLS_descriptor();
7238524.269603 | 0) 0.063 us | paravirt_get_lazy_mode();
7238524.269604 | 0) 3.025 us | }
7238524.269604 | 0) | xen_end_context_switch() {
7238524.269604 | 0) 0.646 us | xen_mc_flush();
7238524.269605 | 0) 0.087 us | paravirt_end_context_switch();
7238524.269606 | 0) 1.604 us | }
^C
Ending tracing...
If you read through the durations carefully, you can see that the shell begins
by completing a 19 second read (time between commands), then has a series of
100 to 200 ms reads (inter-keystroke latency).
The function times printed are inclusive of their children.
The -C option will print on-CPU times only, excluding sleeping or blocking
events from the function duration times. Eg:
# ./funcgraph -Ctp 25285 vfs_read
Tracing "vfs_read" for PID 25285... Ctrl-C to end.
7338520.591816 | 0) | finish_task_switch() {
7338520.591820 | 0) | xen_evtchn_do_upcall() {
7338520.591821 | 0) | irq_enter() {
7338520.591821 | 0) 0.134 us | rcu_irq_enter();
7338520.591822 | 0) 0.823 us | }
7338520.591822 | 0) 0.055 us | exit_idle();
7338520.591822 | 0) | __xen_evtchn_do_upcall() {
7338520.591823 | 0) | evtchn_2l_handle_events() {
7338520.591823 | 0) 0.051 us | irq_from_virq();
7338520.591823 | 0) | evtchn_from_irq() {
7338520.591823 | 0) | irq_get_irq_data() {
7338520.591824 | 0) 0.064 us | irq_to_desc();
7338520.591824 | 0) 0.572 us | }
7338520.591824 | 0) 0.973 us | }
7338520.591825 | 0) | get_evtchn_to_irq() {
7338520.591825 | 0) 0.049 us | evtchn_2l_max_channels();
7338520.591825 | 0) 0.386 us | }
7338520.591825 | 0) | generic_handle_irq() {
7338520.591825 | 0) 0.061 us | irq_to_desc();
7338520.591826 | 0) | handle_percpu_irq() {
7338520.591826 | 0) | ack_dynirq() {
7338520.591826 | 0) | evtchn_from_irq() {
7338520.591826 | 0) | irq_get_irq_data() {
7338520.591827 | 0) 0.050 us | irq_to_desc();
7338520.591827 | 0) 0.441 us | }
7338520.591827 | 0) 0.748 us | }
7338520.591827 | 0) 0.048 us | irq_move_irq();
7338520.591828 | 0) 0.053 us | evtchn_2l_clear_pending();
7338520.591828 | 0) 1.810 us | }
7338520.591828 | 0) | handle_irq_event_percpu() {
7338520.591828 | 0) | xen_irq_work_interrupt() {
7338520.591829 | 0) | irq_enter() {
7338520.591829 | 0) 0.069 us | rcu_irq_enter();
7338520.591829 | 0) 0.386 us | }
7338520.591830 | 0) | __wake_up() {
7338520.591830 | 0) 0.060 us | _raw_spin_lock_irqsave();
7338520.591830 | 0) | __wake_up_common() {
7338520.591830 | 0) | autoremove_wake_function() {
7338520.591831 | 0) | default_wake_function() {
7338520.591831 | 0) | try_to_wake_up() {
7338520.591831 | 0) 0.223 us | _raw_spin_lock_irqsave();
7338520.591832 | 0) 0.243 us | task_waking_fair();
7338520.591832 | 0) | select_task_rq_fair() {
7338520.591833 | 0) 0.063 us | source_load();
7338520.591833 | 0) 0.059 us | target_load();
7338520.591834 | 0) 0.060 us | idle_cpu();
7338520.591834 | 0) 0.059 us | cpus_share_cache();
7338520.591834 | 0) 0.085 us | idle_cpu();
7338520.591835 | 0) 2.176 us | }
7338520.591835 | 0) 0.050 us | _raw_spin_lock();
7338520.591835 | 0) | ttwu_do_activate.constprop.124() {
7338520.591835 | 0) | activate_task() {
7338520.591836 | 0) | enqueue_task() {
7338520.591836 | 0) 0.197 us | update_rq_clock();
7338520.591836 | 0) | enqueue_task_fair() {
7338520.591836 | 0) | enqueue_entity() {
7338520.591837 | 0) 0.118 us | update_curr();
7338520.591837 | 0) 0.060 us | __compute_runnable_contrib.part.51();
7338520.591838 | 0) 0.052 us | __update_entity_load_avg_contrib();
7338520.591838 | 0) 0.132 us | update_cfs_rq_blocked_load();
7338520.591838 | 0) 0.068 us | account_entity_enqueue();
7338520.591839 | 0) 0.327 us | update_cfs_shares();
7338520.591839 | 0) 0.055 us | place_entity();
7338520.591840 | 0) 0.086 us | __enqueue_entity();
7338520.591840 | 0) 0.069 us | update_cfs_rq_blocked_load();
7338520.591840 | 0) 3.870 us | }
7338520.591841 | 0) | enqueue_entity() {
7338520.591841 | 0) 0.050 us | update_curr();
7338520.591841 | 0) 0.048 us | __compute_runnable_contrib.part.51();
7338520.591842 | 0) 0.079 us | __update_entity_load_avg_contrib();
7338520.591842 | 0) 0.068 us | update_cfs_rq_blocked_load();
7338520.591842 | 0) 0.072 us | account_entity_enqueue();
7338520.591843 | 0) 0.068 us | update_cfs_shares();
7338520.591844 | 0) 0.123 us | place_entity();
7338520.591844 | 0) 0.051 us | __enqueue_entity();
7338520.591845 | 0) 3.919 us | }
7338520.591845 | 0) 0.059 us | hrtick_update();
7338520.591845 | 0) 8.895 us | }
7338520.591846 | 0) 9.770 us | }
7338520.591846 | 0) 10.197 us | }
7338520.591846 | 0) | ttwu_do_wakeup() {
7338520.591846 | 0) | check_preempt_curr() {
7338520.591846 | 0) | resched_task() {
7338520.591847 | 0) | xen_smp_send_reschedule() {
7338520.591847 | 0) | xen_send_IPI_one() {
7338520.591847 | 0) | notify_remote_via_irq() {
7338520.591847 | 0) | evtchn_from_irq() {
7338520.591848 | 0) | irq_get_irq_data() {
7338520.591848 | 0) 0.051 us | irq_to_desc();
7338520.591848 | 0) 0.503 us | }
7338520.591848 | 0) 1.031 us | }
7338520.591849 | 0) 2.112 us | }
7338520.591849 | 0) 2.484 us | }
7338520.591850 | 0) 2.851 us | }
7338520.591850 | 0) 3.311 us | }
7338520.591850 | 0) 3.828 us | }
7338520.591851 | 0) 4.788 us | }
7338520.591851 | 0) 15.731 us | }
7338520.591851 | 0) 0.074 us | _raw_spin_unlock();
7338520.591852 | 0) 0.156 us | ttwu_stat();
7338520.591852 | 0) 0.080 us | _raw_spin_unlock_irqrestore();
7338520.591853 | 0) 21.807 us | }
7338520.591853 | 0) 22.286 us | }
7338520.591853 | 0) 22.738 us | }
7338520.591854 | 0) 23.387 us | }
7338520.591854 | 0) 0.105 us | _raw_spin_unlock_irqrestore();
7338520.591854 | 0) 24.698 us | }
7338520.591855 | 0) | irq_exit() {
7338520.591855 | 0) 0.086 us | idle_cpu();
7338520.591856 | 0) 0.105 us | rcu_irq_exit();
7338520.591856 | 0) 1.272 us | }
7338520.591856 | 0) 27.818 us | }
7338520.591857 | 0) 0.140 us | add_interrupt_randomness();
7338520.591857 | 0) 0.084 us | note_interrupt();
7338520.591858 | 0) 29.866 us | }
7338520.591858 | 0) 32.390 us | }
7338520.591859 | 0) 33.204 us | }
7338520.591859 | 0) 36.137 us | }
7338520.591859 | 0) 36.574 us | }
7338520.591859 | 0) | irq_exit() {
7338520.591860 | 0) 0.073 us | idle_cpu();
7338520.591860 | 0) 0.076 us | rcu_irq_exit();
7338520.591861 | 0) 1.091 us | }
7338520.591861 | 0) 40.156 us | }
7338520.591862 | 0) 41.874 us | }
7338520.591862 | 0) 75.633 us | } /* __schedule */
7338520.591862 | 0) 76.182 us | } /* schedule */
7338520.591863 | 0) 76.965 us | } /* schedule_timeout */
7338520.591863 | 0) 0.070 us | down_read();
7338520.591864 | 0) | copy_from_read_buf() {
7338520.591865 | 0) | tty_audit_add_data() {
7338520.591865 | 0) 0.232 us | _raw_spin_lock_irqsave();
7338520.591866 | 0) 0.079 us | _raw_spin_unlock_irqrestore();
7338520.591867 | 0) 0.122 us | _raw_spin_lock_irqsave();
7338520.591867 | 0) 0.066 us | _raw_spin_unlock_irqrestore();
7338520.591868 | 0) 2.642 us | }
7338520.591868 | 0) 3.886 us | }
7338520.591868 | 0) 0.149 us | copy_from_read_buf();
7338520.591869 | 0) 0.072 us | n_tty_set_room();
7338520.591870 | 0) 0.071 us | n_tty_write_wakeup();
7338520.591870 | 0) | __wake_up() {
7338520.591871 | 0) 0.071 us | _raw_spin_lock_irqsave();
7338520.591872 | 0) | __wake_up_common() {
7338520.591872 | 0) 0.097 us | pollwake();
7338520.591873 | 0) 0.739 us | }
7338520.591873 | 0) 0.066 us | _raw_spin_unlock_irqrestore();
7338520.591874 | 0) 3.043 us | }
7338520.591874 | 0) 0.075 us | n_tty_set_room();
7338520.591875 | 0) 0.106 us | up_read();
7338520.591875 | 0) | remove_wait_queue() {
7338520.591875 | 0) 0.078 us | _raw_spin_lock_irqsave();
7338520.591876 | 0) 0.075 us | _raw_spin_unlock_irqrestore();
7338520.591877 | 0) 1.165 us | }
7338520.591877 | 0) 0.137 us | mutex_unlock();
7338520.591877 | 0) 98.321 us | } /* n_tty_read */
7338520.591878 | 0) | tty_ldisc_deref() {
7338520.591878 | 0) 0.072 us | ldsem_up_read();
7338520.591879 | 0) 0.561 us | }
7338520.591879 | 0) 0.090 us | get_seconds();
7338520.591880 | 0) 102.599 us | } /* tty_read */
7338520.591880 | 0) 0.362 us | __fsnotify_parent();
7338520.591881 | 0) 0.171 us | fsnotify();
7338520.591882 | 0) 109.640 us | } /* vfs_read */
7338520.591951 | 0) | vfs_read() {
7338520.591951 | 0) | rw_verify_area() {
7338520.591952 | 0) | security_file_permission() {
7338520.591952 | 0) | apparmor_file_permission() {
7338520.591952 | 0) 0.174 us | common_file_perm();
7338520.591953 | 0) 0.762 us | }
7338520.591953 | 0) 0.126 us | __fsnotify_parent();
7338520.591954 | 0) 0.088 us | fsnotify();
7338520.591954 | 0) 2.609 us | }
7338520.591955 | 0) 3.351 us | }
7338520.591955 | 0) | tty_read() {
7338520.591956 | 0) 0.081 us | tty_paranoia_check();
7338520.591956 | 0) | tty_ldisc_ref_wait() {
7338520.591956 | 0) 0.090 us | ldsem_down_read();
7338520.591957 | 0) 0.633 us | }
7338520.591957 | 0) | n_tty_read() {
7338520.591958 | 0) 0.073 us | _raw_spin_lock_irq();
7338520.591958 | 0) 0.089 us | mutex_lock_interruptible();
7338520.591959 | 0) 0.080 us | down_read();
7338520.591960 | 0) | add_wait_queue() {
7338520.591960 | 0) 0.084 us | _raw_spin_lock_irqsave();
7338520.591960 | 0) 0.087 us | _raw_spin_unlock_irqrestore();
7338520.591961 | 0) 1.215 us | }
7338520.591961 | 0) 0.078 us | tty_hung_up_p();
7338520.591962 | 0) 0.084 us | n_tty_set_room();
7338520.591962 | 0) 0.072 us | up_read();
7338520.591963 | 0) | schedule_timeout() {
7338520.591963 | 0) | schedule() {
7338520.591964 | 0) | __schedule() {
7338520.591964 | 0) 0.084 us | rcu_note_context_switch();
7338520.591965 | 0) 0.086 us | _raw_spin_lock_irq();
7338520.591965 | 0) | deactivate_task() {
7338520.591966 | 0) | dequeue_task() {
7338520.591966 | 0) 0.171 us | update_rq_clock();
7338520.591966 | 0) | dequeue_task_fair() {
7338520.591967 | 0) | dequeue_entity() {
7338520.591967 | 0) | update_curr() {
7338520.591967 | 0) 0.248 us | cpuacct_charge();
7338520.591968 | 0) 0.974 us | }
7338520.591969 | 0) 0.074 us | update_cfs_rq_blocked_load();
7338520.591969 | 0) 0.081 us | clear_buddies();
7338520.591970 | 0) 0.094 us | account_entity_dequeue();
7338520.591971 | 0) | update_cfs_shares() {
7338520.591971 | 0) 0.096 us | update_curr();
7338520.591971 | 0) 0.093 us | account_entity_dequeue();
7338520.591972 | 0) 0.079 us | account_entity_enqueue();
7338520.591972 | 0) 1.743 us | }
7338520.591972 | 0) 5.515 us | }
7338520.591973 | 0) | dequeue_entity() {
7338520.591973 | 0) 0.088 us | update_curr();
7338520.591974 | 0) 0.106 us | update_cfs_rq_blocked_load();
7338520.591975 | 0) 0.078 us | clear_buddies();
7338520.591975 | 0) 0.088 us | account_entity_dequeue();
7338520.591976 | 0) 0.091 us | update_cfs_shares();
7338520.591977 | 0) 3.639 us | }
7338520.591977 | 0) 0.078 us | hrtick_update();
7338520.591978 | 0) 10.851 us | }
7338520.591978 | 0) 11.992 us | }
7338520.591978 | 0) 12.496 us | }
7338520.591978 | 0) | pick_next_task_fair() {
7338520.591979 | 0) 0.079 us | check_cfs_rq_runtime();
7338520.591979 | 0) | pick_next_entity() {
7338520.591979 | 0) 0.080 us | clear_buddies();
7338520.591980 | 0) 0.594 us | }
7338520.591980 | 0) | put_prev_entity() {
7338520.591980 | 0) 0.078 us | check_cfs_rq_runtime();
7338520.591981 | 0) 0.641 us | }
7338520.591981 | 0) | put_prev_entity() {
7338520.591982 | 0) 0.076 us | check_cfs_rq_runtime();
7338520.591982 | 0) 0.610 us | }
7338520.591982 | 0) | set_next_entity() {
7338520.591983 | 0) 0.097 us | update_stats_wait_end();
7338520.591983 | 0) 0.744 us | }
7338520.591984 | 0) 5.115 us | }
7338520.591984 | 0) 0.076 us | paravirt_start_context_switch();
7338520.591985 | 0) 0.086 us | xen_read_cr0();
7338520.591986 | 0) | xen_write_cr0() {
7338520.591986 | 0) 0.078 us | paravirt_get_lazy_mode();
7338520.591987 | 0) 0.086 us | __xen_mc_entry();
7338520.591987 | 0) 0.078 us | paravirt_get_lazy_mode();
7338520.591988 | 0) 1.698 us | }
7338520.591988 | 0) | xen_load_sp0() {
7338520.591988 | 0) 0.074 us | paravirt_get_lazy_mode();
7338520.591989 | 0) 0.084 us | __xen_mc_entry();
7338520.591989 | 0) 0.084 us | paravirt_get_lazy_mode();
7338520.591990 | 0) 1.724 us | }
7338520.591990 | 0) | xen_load_tls() {
7338520.591991 | 0) 0.080 us | paravirt_get_lazy_mode();
7338520.591991 | 0) 0.088 us | paravirt_get_lazy_mode();
7338520.591992 | 0) 0.140 us | load_TLS_descriptor();
7338520.591992 | 0) 0.079 us | load_TLS_descriptor();
7338520.591993 | 0) 0.087 us | load_TLS_descriptor();
7338520.591994 | 0) 0.078 us | paravirt_get_lazy_mode();
7338520.591994 | 0) 3.666 us | }
7338520.591995 | 0) | xen_end_context_switch() {
7338520.591995 | 0) 0.644 us | xen_mc_flush();
7338520.591996 | 0) 0.080 us | paravirt_end_context_switch();
7338520.591997 | 0) 1.813 us | }
7338520.855105 | 0) | finish_task_switch() {
7338520.855110 | 0) | xen_evtchn_do_upcall() {
7338520.855110 | 0) | irq_enter() {
7338520.855110 | 0) 0.137 us | rcu_irq_enter();
7338520.855111 | 0) 0.673 us | }
7338520.855111 | 0) 0.063 us | exit_idle();
7338520.855111 | 0) | __xen_evtchn_do_upcall() {
7338520.855112 | 0) | evtchn_2l_handle_events() {
7338520.855112 | 0) 0.050 us | irq_from_virq();
7338520.855112 | 0) | evtchn_from_irq() {
7338520.855112 | 0) | irq_get_irq_data() {
7338520.855113 | 0) 0.050 us | irq_to_desc();
7338520.855113 | 0) 0.568 us | }
7338520.855113 | 0) 0.895 us | }
7338520.855114 | 0) | get_evtchn_to_irq() {
7338520.855114 | 0) 0.048 us | evtchn_2l_max_channels();
7338520.855114 | 0) 0.386 us | }
7338520.855114 | 0) | generic_handle_irq() {
7338520.855114 | 0) 0.051 us | irq_to_desc();
7338520.855115 | 0) | handle_percpu_irq() {
7338520.855115 | 0) | ack_dynirq() {
7338520.855115 | 0) | evtchn_from_irq() {
7338520.855115 | 0) | irq_get_irq_data() {
7338520.855116 | 0) 0.058 us | irq_to_desc();
7338520.855117 | 0) 1.264 us | }
7338520.855117 | 0) 1.644 us | }
7338520.855117 | 0) 0.048 us | irq_move_irq();
7338520.855118 | 0) 0.050 us | evtchn_2l_clear_pending();
7338520.855118 | 0) 2.876 us | }
7338520.855118 | 0) | handle_irq_event_percpu() {
7338520.855119 | 0) | xen_irq_work_interrupt() {
7338520.855119 | 0) | irq_enter() {
7338520.855119 | 0) 0.055 us | rcu_irq_enter();
7338520.855119 | 0) 0.460 us | }
7338520.855120 | 0) | __wake_up() {
7338520.855120 | 0) 0.057 us | _raw_spin_lock_irqsave();
7338520.855120 | 0) | __wake_up_common() {
7338520.855121 | 0) | autoremove_wake_function() {
7338520.855121 | 0) | default_wake_function() {
7338520.855121 | 0) | try_to_wake_up() {
7338520.855121 | 0) 0.203 us | _raw_spin_lock_irqsave();
7338520.855122 | 0) 0.179 us | task_waking_fair();
7338520.855123 | 0) | select_task_rq_fair() {
7338520.855123 | 0) 0.048 us | source_load();
7338520.855123 | 0) 0.059 us | target_load();
7338520.855124 | 0) 0.059 us | idle_cpu();
7338520.855124 | 0) 0.058 us | cpus_share_cache();
7338520.855124 | 0) 0.058 us | idle_cpu();
7338520.855125 | 0) 1.940 us | }
7338520.855125 | 0) 0.057 us | _raw_spin_lock();
7338520.855125 | 0) | ttwu_do_activate.constprop.124() {
7338520.855125 | 0) | activate_task() {
7338520.855126 | 0) | enqueue_task() {
7338520.855126 | 0) 0.171 us | update_rq_clock();
7338520.855126 | 0) | enqueue_task_fair() {
7338520.855126 | 0) | enqueue_entity() {
7338520.855127 | 0) 0.063 us | update_curr();
7338520.855127 | 0) 0.078 us | __compute_runnable_contrib.part.51();
7338520.855127 | 0) 0.066 us | __update_entity_load_avg_contrib();
7338520.855128 | 0) 0.061 us | update_cfs_rq_blocked_load();
7338520.855128 | 0) 0.072 us | account_entity_enqueue();
7338520.855128 | 0) 0.116 us | update_cfs_shares();
7338520.855129 | 0) 0.062 us | place_entity();
7338520.855129 | 0) 0.087 us | __enqueue_entity();
7338520.855129 | 0) 2.950 us | }
7338520.855130 | 0) | enqueue_entity() {
7338520.855130 | 0) 0.065 us | update_curr();
7338520.855130 | 0) 0.065 us | update_cfs_rq_blocked_load();
7338520.855130 | 0) 0.067 us | account_entity_enqueue();
7338520.855131 | 0) 0.084 us | update_cfs_shares();
7338520.855131 | 0) 0.112 us | place_entity();
7338520.855131 | 0) 0.051 us | __enqueue_entity();
7338520.855132 | 0) 2.074 us | }
7338520.855132 | 0) 0.055 us | hrtick_update();
7338520.855132 | 0) 5.983 us | }
7338520.855133 | 0) 6.790 us | }
7338520.855133 | 0) 7.138 us | }
7338520.855133 | 0) | ttwu_do_wakeup() {
7338520.855133 | 0) | check_preempt_curr() {
7338520.855133 | 0) | resched_task() {
7338520.855133 | 0) | xen_smp_send_reschedule() {
7338520.855134 | 0) | xen_send_IPI_one() {
7338520.855134 | 0) | notify_remote_via_irq() {
7338520.855134 | 0) | evtchn_from_irq() {
7338520.855134 | 0) | irq_get_irq_data() {
7338520.855134 | 0) 0.057 us | irq_to_desc();
7338520.855135 | 0) 0.502 us | }
7338520.855135 | 0) 0.865 us | }
7338520.855136 | 0) 1.975 us | } /* notify_remote_via_irq */
7338520.855136 | 0) 2.350 us | }
7338520.855136 | 0) 2.723 us | }
7338520.855136 | 0) 3.175 us | }
7338520.855137 | 0) 3.620 us | }
7338520.855138 | 0) 4.642 us | }
7338520.855138 | 0) 12.409 us | }
7338520.855138 | 0) 0.059 us | _raw_spin_unlock();
7338520.855139 | 0) 0.108 us | ttwu_stat();
7338520.855140 | 0) 0.073 us | _raw_spin_unlock_irqrestore();
7338520.855140 | 0) 18.857 us | }
7338520.855141 | 0) 19.415 us | }
7338520.855141 | 0) 19.993 us | }
7338520.855141 | 0) 20.587 us | }
7338520.855141 | 0) 0.070 us | _raw_spin_unlock_irqrestore();
7338520.855142 | 0) 21.858 us | }
7338520.855142 | 0) | irq_exit() {
7338520.855143 | 0) 0.084 us | idle_cpu();
7338520.855143 | 0) 0.082 us | rcu_irq_exit();
7338520.855144 | 0) 1.235 us | }
7338520.855144 | 0) 25.109 us | }
7338520.855144 | 0) 0.126 us | add_interrupt_randomness();
7338520.855145 | 0) 0.091 us | note_interrupt();
7338520.855145 | 0) 26.935 us | }
7338520.855146 | 0) 30.693 us | }
7338520.855146 | 0) 31.575 us | }
7338520.855146 | 0) 34.424 us | }
7338520.855147 | 0) 34.841 us | }
7338520.855147 | 0) | irq_exit() {
7338520.855147 | 0) 0.083 us | idle_cpu();
7338520.855148 | 0) 0.069 us | rcu_irq_exit();
7338520.855148 | 0) 1.056 us | }
7338520.855148 | 0) 38.284 us | }
7338520.855149 | 0) 39.892 us | }
7338520.855150 | 0) 72.181 us | }
7338520.855150 | 0) 72.925 us | }
7338520.855150 | 0) 73.638 us | }
7338520.855151 | 0) 0.078 us | down_read();
7338520.855152 | 0) | copy_from_read_buf() {
7338520.855153 | 0) | tty_audit_add_data() {
7338520.855153 | 0) 0.272 us | _raw_spin_lock_irqsave();
7338520.855154 | 0) 0.063 us | _raw_spin_unlock_irqrestore();
7338520.855155 | 0) 0.086 us | _raw_spin_lock_irqsave();
7338520.855155 | 0) 0.067 us | _raw_spin_unlock_irqrestore();
7338520.855156 | 0) 2.808 us | }
7338520.855156 | 0) 4.330 us | }
7338520.855156 | 0) 0.083 us | copy_from_read_buf();
7338520.855157 | 0) 0.062 us | n_tty_set_room();
7338520.855158 | 0) 0.079 us | n_tty_write_wakeup();
7338520.855158 | 0) | __wake_up() {
7338520.855158 | 0) 0.068 us | _raw_spin_lock_irqsave();
7338520.855159 | 0) | __wake_up_common() {
7338520.855159 | 0) 0.092 us | pollwake();
7338520.855160 | 0) 0.643 us | }
7338520.855160 | 0) 0.074 us | _raw_spin_unlock_irqrestore();
7338520.855160 | 0) 2.040 us | }
7338520.855161 | 0) 0.074 us | n_tty_set_room();
7338520.855162 | 0) 0.073 us | up_read();
7338520.855162 | 0) | remove_wait_queue() {
7338520.855162 | 0) 0.084 us | _raw_spin_lock_irqsave();
7338520.855163 | 0) 0.078 us | _raw_spin_unlock_irqrestore();
7338520.855163 | 0) 1.166 us | }
7338520.855164 | 0) 0.140 us | mutex_unlock();
7338520.855164 | 0) 93.360 us | }
7338520.855165 | 0) | tty_ldisc_deref() {
7338520.855165 | 0) 0.070 us | ldsem_up_read();
7338520.855166 | 0) 0.746 us | }
7338520.855166 | 0) 0.071 us | get_seconds();
7338520.855167 | 0) 97.713 us | }
7338520.855167 | 0) 0.283 us | __fsnotify_parent();
7338520.855168 | 0) 0.172 us | fsnotify();
7338520.855168 | 0) 103.847 us | }
7338520.855238 | 0) | vfs_read() {
7338520.855239 | 0) | rw_verify_area() {
7338520.855240 | 0) | security_file_permission() {
7338520.855240 | 0) | apparmor_file_permission() {
7338520.855240 | 0) 0.160 us | common_file_perm();
7338520.855241 | 0) 0.770 us | }
7338520.855241 | 0) 0.078 us | __fsnotify_parent();
7338520.855242 | 0) 0.087 us | fsnotify();
7338520.855243 | 0) 2.595 us | }
7338520.855243 | 0) 4.148 us | }
7338520.855243 | 0) | tty_read() {
7338520.855244 | 0) 0.078 us | tty_paranoia_check();
7338520.855244 | 0) | tty_ldisc_ref_wait() {
7338520.855244 | 0) 0.084 us | ldsem_down_read();
7338520.855245 | 0) 0.643 us | }
7338520.855245 | 0) | n_tty_read() {
7338520.855246 | 0) 0.079 us | _raw_spin_lock_irq();
7338520.855247 | 0) 0.171 us | mutex_lock_interruptible();
7338520.855247 | 0) 0.064 us | down_read();
7338520.855248 | 0) | add_wait_queue() {
7338520.855248 | 0) 0.078 us | _raw_spin_lock_irqsave();
7338520.855249 | 0) 0.082 us | _raw_spin_unlock_irqrestore();
7338520.855249 | 0) 1.076 us | }
7338520.855250 | 0) 0.075 us | tty_hung_up_p();
7338520.855250 | 0) 0.079 us | n_tty_set_room();
7338520.855251 | 0) 0.075 us | up_read();
7338520.855251 | 0) | schedule_timeout() {
7338520.855252 | 0) | schedule() {
7338520.855252 | 0) | __schedule() {
7338520.855252 | 0) 0.084 us | rcu_note_context_switch();
7338520.855253 | 0) 0.079 us | _raw_spin_lock_irq();
7338520.855254 | 0) | deactivate_task() {
7338520.855254 | 0) | dequeue_task() {
7338520.855254 | 0) 0.219 us | update_rq_clock();
7338520.855255 | 0) | dequeue_task_fair() {
7338520.855255 | 0) | dequeue_entity() {
7338520.855255 | 0) | update_curr() {
7338520.855256 | 0) 0.186 us | cpuacct_charge();
7338520.855257 | 0) 0.924 us | }
7338520.855257 | 0) 0.078 us | update_cfs_rq_blocked_load();
7338520.855258 | 0) 0.078 us | clear_buddies();
7338520.855258 | 0) 0.083 us | account_entity_dequeue();
7338520.855259 | 0) | update_cfs_shares() {
7338520.855259 | 0) 0.105 us | update_curr();
7338520.855260 | 0) 0.093 us | account_entity_dequeue();
7338520.855260 | 0) 0.098 us | account_entity_enqueue();
7338520.855261 | 0) 1.825 us | }
7338520.855261 | 0) 5.574 us | }
7338520.855261 | 0) | dequeue_entity() {
7338520.855261 | 0) 0.086 us | update_curr();
7338520.855262 | 0) 0.127 us | __update_entity_load_avg_contrib();
7338520.855263 | 0) 0.070 us | update_cfs_rq_blocked_load();
7338520.855263 | 0) 0.066 us | clear_buddies();
7338520.855264 | 0) 0.082 us | account_entity_dequeue();
7338520.855264 | 0) 0.104 us | update_cfs_shares();
7338520.855265 | 0) 3.439 us | }
7338520.855265 | 0) 0.078 us | hrtick_update();
7338520.855266 | 0) 10.741 us | }
7338520.855266 | 0) 11.990 us | }
7338520.855266 | 0) 12.580 us | }
7338520.855267 | 0) | pick_next_task_fair() {
7338520.855267 | 0) 0.074 us | check_cfs_rq_runtime();
7338520.855268 | 0) | pick_next_entity() {
7338520.855268 | 0) 0.078 us | clear_buddies();
7338520.855269 | 0) 0.696 us | }
7338520.855269 | 0) | put_prev_entity() {
7338520.855269 | 0) 0.084 us | check_cfs_rq_runtime();
7338520.855270 | 0) 0.628 us | }
7338520.855270 | 0) | put_prev_entity() {
7338520.855270 | 0) 0.074 us | check_cfs_rq_runtime();
7338520.855271 | 0) 0.575 us | }
7338520.855271 | 0) | set_next_entity() {
7338520.855272 | 0) 0.104 us | update_stats_wait_end();
7338520.855273 | 0) 0.834 us | }
7338520.855273 | 0) 5.872 us | }
7338520.855274 | 0) 0.079 us | paravirt_start_context_switch();
7338520.855275 | 0) 0.080 us | xen_read_cr0();
7338520.855276 | 0) | xen_write_cr0() {
7338520.855276 | 0) 0.091 us | paravirt_get_lazy_mode();
7338520.855277 | 0) 0.087 us | __xen_mc_entry();
7338520.855277 | 0) 0.076 us | paravirt_get_lazy_mode();
7338520.855278 | 0) 1.986 us | }
7338520.855278 | 0) | xen_load_sp0() {
7338520.855278 | 0) 0.066 us | paravirt_get_lazy_mode();
7338520.855279 | 0) 0.083 us | __xen_mc_entry();
7338520.855280 | 0) 0.082 us | paravirt_get_lazy_mode();
7338520.855280 | 0) 1.925 us | }
7338520.855281 | 0) | xen_load_tls() {
7338520.855281 | 0) 0.082 us | paravirt_get_lazy_mode();
7338520.855281 | 0) 0.080 us | paravirt_get_lazy_mode();
7338520.855282 | 0) 0.137 us | load_TLS_descriptor();
7338520.855283 | 0) 0.090 us | load_TLS_descriptor();
7338520.855283 | 0) 0.081 us | load_TLS_descriptor();
7338520.855284 | 0) 0.081 us | paravirt_get_lazy_mode();
7338520.855284 | 0) 3.397 us | }
7338520.855284 | 0) | xen_end_context_switch() {
7338520.855285 | 0) 0.618 us | xen_mc_flush();
7338520.855286 | 0) 0.086 us | paravirt_end_context_switch();
7338520.855286 | 0) 1.708 us | }
^C
Ending tracing...
Understanding whether the time is on-CPU or blocked off-CPU directs the
performance investigation.
Use -h to print the USAGE message:
# ./funcgraph -h
USAGE: funcgraph [-aCDhHPtT] [-m maxdepth] [-p PID] [-L TID] [-d secs] funcstring
-a # all info (same as -HPt)
-C # measure on-CPU time only
-d seconds # trace duration, and use buffers
-D # do not show function duration
-h # this usage message
-H # include column headers
-m maxdepth # max stack depth to show
-p PID # trace when this pid is on-CPU
-L TID # trace when this thread is on-CPU
-P # show process names & PIDs
-t # show timestamps
-T # comment function tails
eg,
funcgraph do_nanosleep # trace do_nanosleep() and children
funcgraph -m 3 do_sys_open # trace do_sys_open() to 3 levels only
funcgraph -a do_sys_open # include timestamps and process name
funcgraph -p 198 do_sys_open # trace vfs_read() for PID 198 only
funcgraph -d 1 do_sys_open >out # trace 1 sec, then write to file
See the man page and example file for more info.