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f3cef7a [PATCH] csa: basic accounting over taskstats
Jay Lan authored
1 /*
2 * tsacct.c - System accounting over taskstats interface
3 *
4 * Copyright (C) Jay Lan, <jlan@sgi.com>
5 *
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 */
18
19 #include <linux/kernel.h>
20 #include <linux/sched.h>
21 #include <linux/tsacct_kern.h>
22 #include <linux/acct.h>
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23 #include <linux/jiffies.h>
d559db0 mm: clean up mm_counter
KAMEZAWA Hiroyuki authored
24 #include <linux/mm.h>
f3cef7a [PATCH] csa: basic accounting over taskstats
Jay Lan authored
25
26 /*
27 * fill in basic accounting fields
28 */
29 void bacct_add_tsk(struct taskstats *stats, struct task_struct *tsk)
30 {
c69e8d9 CRED: Use RCU to access another task's creds and to release a task's own...
David Howells authored
31 const struct cred *tcred;
f3cef7a [PATCH] csa: basic accounting over taskstats
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32 struct timespec uptime, ts;
3e85ba0 tsacct: fix bacct_add_tsk()'s use of do_div()
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33 u64 ac_etime;
f3cef7a [PATCH] csa: basic accounting over taskstats
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34
35 BUILD_BUG_ON(TS_COMM_LEN < TASK_COMM_LEN);
36
37 /* calculate task elapsed time in timespec */
38 do_posix_clock_monotonic_gettime(&uptime);
05d5bcd [PATCH] bacct_add_tsk: fix unsafe and wrong parent/group_leader derefere...
Oleg Nesterov authored
39 ts = timespec_sub(uptime, tsk->start_time);
3e85ba0 tsacct: fix bacct_add_tsk()'s use of do_div()
David Howells authored
40 /* rebase elapsed time to usec (should never be negative) */
f3cef7a [PATCH] csa: basic accounting over taskstats
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41 ac_etime = timespec_to_ns(&ts);
42 do_div(ac_etime, NSEC_PER_USEC);
43 stats->ac_etime = ac_etime;
2c6b47d Cleanup non-arch xtime uses, use get_seconds() or current_kernel_time().
john stultz authored
44 stats->ac_btime = get_seconds() - ts.tv_sec;
f3cef7a [PATCH] csa: basic accounting over taskstats
Jay Lan authored
45 if (thread_group_leader(tsk)) {
46 stats->ac_exitcode = tsk->exit_code;
47 if (tsk->flags & PF_FORKNOEXEC)
48 stats->ac_flag |= AFORK;
49 }
50 if (tsk->flags & PF_SUPERPRIV)
51 stats->ac_flag |= ASU;
52 if (tsk->flags & PF_DUMPCORE)
53 stats->ac_flag |= ACORE;
54 if (tsk->flags & PF_SIGNALED)
55 stats->ac_flag |= AXSIG;
56 stats->ac_nice = task_nice(tsk);
57 stats->ac_sched = tsk->policy;
58 stats->ac_pid = tsk->pid;
05d5bcd [PATCH] bacct_add_tsk: fix unsafe and wrong parent/group_leader derefere...
Oleg Nesterov authored
59 rcu_read_lock();
c69e8d9 CRED: Use RCU to access another task's creds and to release a task's own...
David Howells authored
60 tcred = __task_cred(tsk);
61 stats->ac_uid = tcred->uid;
62 stats->ac_gid = tcred->gid;
05d5bcd [PATCH] bacct_add_tsk: fix unsafe and wrong parent/group_leader derefere...
Oleg Nesterov authored
63 stats->ac_ppid = pid_alive(tsk) ?
64 rcu_dereference(tsk->real_parent)->tgid : 0;
65 rcu_read_unlock();
d57af9b taskstats: use real microsecond granularity for CPU times
Michael Holzheu authored
66 stats->ac_utime = cputime_to_usecs(tsk->utime);
67 stats->ac_stime = cputime_to_usecs(tsk->stime);
68 stats->ac_utimescaled = cputime_to_usecs(tsk->utimescaled);
69 stats->ac_stimescaled = cputime_to_usecs(tsk->stimescaled);
f3cef7a [PATCH] csa: basic accounting over taskstats
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70 stats->ac_minflt = tsk->min_flt;
71 stats->ac_majflt = tsk->maj_flt;
72
73 strncpy(stats->ac_comm, tsk->comm, sizeof(stats->ac_comm));
74 }
75
9acc185 [PATCH] csa: Extended system accounting over taskstats
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76
77 #ifdef CONFIG_TASK_XACCT
db5fed2 [PATCH] csa accounting taskstats update
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78
79 #define KB 1024
80 #define MB (1024*KB)
58c3c3a @torvalds Make taskstats round statistics down to nearest 1k bytes/events
torvalds authored
81 #define KB_MASK (~(KB-1))
9acc185 [PATCH] csa: Extended system accounting over taskstats
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82 /*
83 * fill in extended accounting fields
84 */
85 void xacct_add_tsk(struct taskstats *stats, struct task_struct *p)
86 {
f0ec1aa [PATCH] xacct_add_tsk: fix pure theoretical ->mm use-after-free
Oleg Nesterov authored
87 struct mm_struct *mm;
88
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Jonathan Lim authored
89 /* convert pages-usec to Mbyte-usec */
90 stats->coremem = p->acct_rss_mem1 * PAGE_SIZE / MB;
91 stats->virtmem = p->acct_vm_mem1 * PAGE_SIZE / MB;
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Oleg Nesterov authored
92 mm = get_task_mm(p);
93 if (mm) {
db5fed2 [PATCH] csa accounting taskstats update
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94 /* adjust to KB unit */
901608d @utrace mm: introduce get_mm_hiwater_xxx(), fix taskstats->hiwater_xxx accountin...
utrace authored
95 stats->hiwater_rss = get_mm_hiwater_rss(mm) * PAGE_SIZE / KB;
96 stats->hiwater_vm = get_mm_hiwater_vm(mm) * PAGE_SIZE / KB;
f0ec1aa [PATCH] xacct_add_tsk: fix pure theoretical ->mm use-after-free
Oleg Nesterov authored
97 mmput(mm);
9acc185 [PATCH] csa: Extended system accounting over taskstats
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98 }
58c3c3a @torvalds Make taskstats round statistics down to nearest 1k bytes/events
torvalds authored
99 stats->read_char = p->ioac.rchar & KB_MASK;
100 stats->write_char = p->ioac.wchar & KB_MASK;
101 stats->read_syscalls = p->ioac.syscr & KB_MASK;
102 stats->write_syscalls = p->ioac.syscw & KB_MASK;
4a7864c [PATCH] io-accounting: via taskstats
Andrew Morton authored
103 #ifdef CONFIG_TASK_IO_ACCOUNTING
58c3c3a @torvalds Make taskstats round statistics down to nearest 1k bytes/events
torvalds authored
104 stats->read_bytes = p->ioac.read_bytes & KB_MASK;
105 stats->write_bytes = p->ioac.write_bytes & KB_MASK;
106 stats->cancelled_write_bytes = p->ioac.cancelled_write_bytes & KB_MASK;
4a7864c [PATCH] io-accounting: via taskstats
Andrew Morton authored
107 #else
108 stats->read_bytes = 0;
109 stats->write_bytes = 0;
110 stats->cancelled_write_bytes = 0;
111 #endif
9acc185 [PATCH] csa: Extended system accounting over taskstats
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112 }
db5fed2 [PATCH] csa accounting taskstats update
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113 #undef KB
114 #undef MB
8f0ab51 [PATCH] csa: convert CONFIG tag for extended accounting routines
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115
116 /**
117 * acct_update_integrals - update mm integral fields in task_struct
118 * @tsk: task_struct for accounting
119 */
120 void acct_update_integrals(struct task_struct *tsk)
121 {
122 if (likely(tsk->mm)) {
49b5cf3 accounting: account for user time when updating memory integrals
Jonathan Lim authored
123 cputime_t time, dtime;
124 struct timeval value;
6d5b5ac Fix fixpoint divide exception in acct_update_integrals
Heiko Carstens authored
125 unsigned long flags;
49b5cf3 accounting: account for user time when updating memory integrals
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126 u64 delta;
127
6d5b5ac Fix fixpoint divide exception in acct_update_integrals
Heiko Carstens authored
128 local_irq_save(flags);
49b5cf3 accounting: account for user time when updating memory integrals
Jonathan Lim authored
129 time = tsk->stime + tsk->utime;
130 dtime = cputime_sub(time, tsk->acct_timexpd);
131 jiffies_to_timeval(cputime_to_jiffies(dtime), &value);
132 delta = value.tv_sec;
133 delta = delta * USEC_PER_SEC + value.tv_usec;
8f0ab51 [PATCH] csa: convert CONFIG tag for extended accounting routines
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134
135 if (delta == 0)
6d5b5ac Fix fixpoint divide exception in acct_update_integrals
Heiko Carstens authored
136 goto out;
49b5cf3 accounting: account for user time when updating memory integrals
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137 tsk->acct_timexpd = time;
8f0ab51 [PATCH] csa: convert CONFIG tag for extended accounting routines
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138 tsk->acct_rss_mem1 += delta * get_mm_rss(tsk->mm);
139 tsk->acct_vm_mem1 += delta * tsk->mm->total_vm;
6d5b5ac Fix fixpoint divide exception in acct_update_integrals
Heiko Carstens authored
140 out:
141 local_irq_restore(flags);
8f0ab51 [PATCH] csa: convert CONFIG tag for extended accounting routines
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142 }
143 }
144
145 /**
146 * acct_clear_integrals - clear the mm integral fields in task_struct
147 * @tsk: task_struct whose accounting fields are cleared
148 */
149 void acct_clear_integrals(struct task_struct *tsk)
150 {
49b5cf3 accounting: account for user time when updating memory integrals
Jonathan Lim authored
151 tsk->acct_timexpd = 0;
8f0ab51 [PATCH] csa: convert CONFIG tag for extended accounting routines
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152 tsk->acct_rss_mem1 = 0;
153 tsk->acct_vm_mem1 = 0;
154 }
9acc185 [PATCH] csa: Extended system accounting over taskstats
Jay Lan authored
155 #endif
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