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erl_process.c
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erl_process.c
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/*
* %CopyrightBegin%
*
* Copyright Ericsson AB 1996-2012. All Rights Reserved.
*
* The contents of this file are subject to the Erlang Public License,
* Version 1.1, (the "License"); you may not use this file except in
* compliance with the License. You should have received a copy of the
* Erlang Public License along with this software. If not, it can be
* retrieved online at http://www.erlang.org/.
*
* Software distributed under the License is distributed on an "AS IS"
* basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
* the License for the specific language governing rights and limitations
* under the License.
*
* %CopyrightEnd%
*/
#define ERL_PROCESS_C__
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <stddef.h> /* offsetof() */
#include "sys.h"
#include "erl_vm.h"
#include "global.h"
#include "erl_process.h"
#include "error.h"
#include "bif.h"
#include "erl_db.h"
#include "dist.h"
#include "beam_catches.h"
#include "erl_instrument.h"
#include "erl_threads.h"
#include "erl_binary.h"
#include "beam_bp.h"
#include "erl_cpu_topology.h"
#include "erl_thr_progress.h"
#include "erl_thr_queue.h"
#include "erl_async.h"
#include "dtrace-wrapper.h"
#define ERTS_RUNQ_CHECK_BALANCE_REDS_PER_SCHED (2000*CONTEXT_REDS)
#define ERTS_RUNQ_CALL_CHECK_BALANCE_REDS \
(ERTS_RUNQ_CHECK_BALANCE_REDS_PER_SCHED/2)
#define ERTS_PROC_MIN_CONTEXT_SWITCH_REDS_COST (CONTEXT_REDS/10)
#define ERTS_SCHED_SPIN_UNTIL_YIELD 100
#define ERTS_SCHED_SYS_SLEEP_SPINCOUNT_VERY_LONG 40
#define ERTS_SCHED_AUX_WORK_SLEEP_SPINCOUNT_FACT_VERY_LONG 1000
#define ERTS_SCHED_SYS_SLEEP_SPINCOUNT_LONG 20
#define ERTS_SCHED_AUX_WORK_SLEEP_SPINCOUNT_FACT_LONG 1000
#define ERTS_SCHED_SYS_SLEEP_SPINCOUNT_MEDIUM 10
#define ERTS_SCHED_AUX_WORK_SLEEP_SPINCOUNT_FACT_MEDIUM 1000
#define ERTS_SCHED_SYS_SLEEP_SPINCOUNT_SHORT 10
#define ERTS_SCHED_AUX_WORK_SLEEP_SPINCOUNT_FACT_SHORT 0
#define ERTS_SCHED_SYS_SLEEP_SPINCOUNT_VERY_SHORT 5
#define ERTS_SCHED_AUX_WORK_SLEEP_SPINCOUNT_FACT_VERY_SHORT 0
#define ERTS_SCHED_SYS_SLEEP_SPINCOUNT_NONE 0
#define ERTS_SCHED_AUX_WORK_SLEEP_SPINCOUNT_FACT_NONE 0
#define ERTS_SCHED_TSE_SLEEP_SPINCOUNT_FACT 1000
#define ERTS_SCHED_SUSPEND_SLEEP_SPINCOUNT 0
#if 0 || defined(DEBUG)
#define ERTS_FAKE_SCHED_BIND_PRINT_SORTED_CPU_DATA
#endif
#if defined(DEBUG) && 0
#define HARDDEBUG
#else
#undef HARDDEBUG
#endif
#ifdef HARDDEBUG
#define HARDDEBUG_RUNQS
#endif
#ifdef HIPE
#include "hipe_mode_switch.h" /* for hipe_init_process() */
#include "hipe_signal.h" /* for hipe_thread_signal_init() */
#endif
#ifdef ERTS_ENABLE_LOCK_COUNT
#include "erl_lock_count.h"
#endif
#define MAX_BIT (1 << PRIORITY_MAX)
#define HIGH_BIT (1 << PRIORITY_HIGH)
#define NORMAL_BIT (1 << PRIORITY_NORMAL)
#define LOW_BIT (1 << PRIORITY_LOW)
#define PORT_BIT (1 << ERTS_PORT_PRIO_LEVEL)
#define ERTS_EMPTY_RUNQ(RQ) \
((ERTS_RUNQ_FLGS_GET_NOB((RQ)) & ERTS_RUNQ_FLGS_QMASK) == 0 \
&& (RQ)->misc.start == NULL)
#undef RUNQ_READ_RQ
#undef RUNQ_SET_RQ
#define RUNQ_READ_RQ(X) ((ErtsRunQueue *) erts_smp_atomic_read_nob((X)))
#define RUNQ_SET_RQ(X, RQ) erts_smp_atomic_set_nob((X), (erts_aint_t) (RQ))
#ifdef DEBUG
# if defined(ARCH_64) && !HALFWORD_HEAP
# define ERTS_DBG_SET_INVALID_RUNQP(RQP, N) \
(RUNQ_SET_RQ((RQP), (0xdeadbeefdead0003LL | ((N) << 4)))
# define ERTS_DBG_VERIFY_VALID_RUNQP(RQP) \
do { \
ASSERT((RQP) != NULL); \
ASSERT(((((Uint) (RQP)) & ((Uint) 0x3))) == ((Uint) 0)); \
ASSERT((((Uint) (RQP)) & ~((Uint) 0xffff)) != ((Uint) 0xdeadbeefdead0000LL));\
} while (0)
# else
# define ERTS_DBG_SET_INVALID_RUNQP(RQP, N) \
(RUNQ_SET_RQ((RQP), (0xdead0003 | ((N) << 4))))
# define ERTS_DBG_VERIFY_VALID_RUNQP(RQP) \
do { \
ASSERT((RQP) != NULL); \
ASSERT(((((UWord) (RQP)) & ((UWord) 1))) == ((UWord) 0)); \
ASSERT((((UWord) (RQP)) & ~((UWord) 0xffff)) != ((UWord) 0xdead0000)); \
} while (0)
# endif
#else
# define ERTS_DBG_SET_INVALID_RUNQP(RQP, N)
# define ERTS_DBG_VERIFY_VALID_RUNQP(RQP)
#endif
#define ERTS_EMPTY_RUNQ_PORTS(RQ) \
(RUNQ_READ_LEN(&(RQ)->ports.info.len) == 0 && (RQ)->misc.start == NULL)
extern BeamInstr beam_apply[];
extern BeamInstr beam_exit[];
extern BeamInstr beam_continue_exit[];
#ifdef ARCH_32
union {
erts_smp_dw_atomic_t pid_data;
char align[ERTS_CACHE_LINE_SIZE];
} last erts_align_attribute(ERTS_CACHE_LINE_SIZE);
static ERTS_INLINE Uint64
dw_aint_to_uint64(erts_dw_aint_t *dw)
{
#ifdef ETHR_SU_DW_NAINT_T__
return (Uint64) dw->dw_sint;
#else
Uint64 res;
res = (Uint64) ((Uint32) dw->sint[ERTS_DW_AINT_HIGH_WORD]);
res <<= 32;
res |= (Uint64) ((Uint32) dw->sint[ERTS_DW_AINT_LOW_WORD]);
return res;
#endif
}
static void
unint64_to_dw_aint(erts_dw_aint_t *dw, Uint64 val)
{
#ifdef ETHR_SU_DW_NAINT_T__
dw->dw_sint = (ETHR_SU_DW_NAINT_T__) val;
#else
dw->sint[ERTS_DW_AINT_LOW_WORD] = (erts_aint_t) (val & 0xffffffff);
dw->sint[ERTS_DW_AINT_HIGH_WORD] = (erts_aint_t) ((val >> 32) & 0xffffffff);
#endif
}
static ERTS_INLINE void
last_pid_data_init_nob(Uint64 val)
{
erts_dw_aint_t dw;
unint64_to_dw_aint(&dw, val);
erts_smp_dw_atomic_init_nob(&last.pid_data, &dw);
}
static ERTS_INLINE void
last_pid_data_set_relb(Uint64 val)
{
erts_dw_aint_t dw;
unint64_to_dw_aint(&dw, val);
erts_smp_dw_atomic_set_relb(&last.pid_data, &dw);
}
static ERTS_INLINE Uint64
last_pid_data_read_nob(void)
{
erts_dw_aint_t dw;
erts_smp_dw_atomic_read_nob(&last.pid_data, &dw);
return dw_aint_to_uint64(&dw);
}
static ERTS_INLINE Uint64
last_pid_data_read_acqb(void)
{
erts_dw_aint_t dw;
erts_smp_dw_atomic_read_acqb(&last.pid_data, &dw);
return dw_aint_to_uint64(&dw);
}
static ERTS_INLINE Uint64
last_pid_data_cmpxchg_relb(Uint64 new, Uint64 exp)
{
erts_dw_aint_t dw_new, dw_xchg;
unint64_to_dw_aint(&dw_new, new);
unint64_to_dw_aint(&dw_xchg, exp);
if (erts_smp_dw_atomic_cmpxchg_relb(&last.pid_data, &dw_new, &dw_xchg))
return exp;
else
return dw_aint_to_uint64(&dw_xchg);
}
#elif defined(ARCH_64)
union {
erts_smp_atomic_t pid_data;
char align[ERTS_CACHE_LINE_SIZE];
} last erts_align_attribute(ERTS_CACHE_LINE_SIZE);
static ERTS_INLINE void
last_pid_data_init_nob(Uint64 val)
{
erts_smp_atomic_init_nob(&last.pid_data, (erts_aint_t) val);
}
static ERTS_INLINE void
last_pid_data_set_relb(Uint64 val)
{
erts_smp_atomic_set_relb(&last.pid_data, (erts_aint_t) val);
}
static ERTS_INLINE Uint64
last_pid_data_read_nob(void)
{
return (Uint64) erts_smp_atomic_read_nob(&last.pid_data);
}
static ERTS_INLINE Uint64
last_pid_data_read_acqb(void)
{
return (Uint64) erts_smp_atomic_read_acqb(&last.pid_data);
}
static ERTS_INLINE Uint64
last_pid_data_cmpxchg_relb(Uint64 new, Uint64 exp)
{
return (Uint64) erts_smp_atomic_cmpxchg_relb(&last.pid_data,
(erts_aint_t) new,
(erts_aint_t) exp);
}
#else
# error "Not 64-bit, nor 32-bit architecture..."
#endif
static ERTS_INLINE int
last_pid_data_cmp(Uint64 lpd1, Uint64 lpd2)
{
Uint64 lpd1_wrap;
if (lpd1 == lpd2)
return 0;
lpd1_wrap = lpd1 + (((Uint64) 1) << 63);
if (lpd1 < lpd1_wrap)
return (lpd1 < lpd2 && lpd2 < lpd1_wrap) ? -1 : 1;
else
return (lpd1_wrap <= lpd2 && lpd2 < lpd1) ? 1 : -1;
}
#define ERTS_PID_DATA_MASK__ ((1 << _PID_DATA_SIZE) - 1)
int erts_sched_compact_load;
Uint erts_no_schedulers;
ErtsProcTab erts_proc erts_align_attribute(ERTS_CACHE_LINE_SIZE);
int erts_sched_thread_suggested_stack_size = -1;
#ifdef ERTS_ENABLE_LOCK_CHECK
ErtsLcPSDLocks erts_psd_required_locks[ERTS_PSD_SIZE];
#endif
static struct {
int aux_work;
int tse;
int sys_schedule;
} sched_busy_wait;
#ifdef ERTS_SMP
int erts_disable_proc_not_running_opt;
static ErtsAuxWorkData *aux_thread_aux_work_data;
#define ERTS_SCHDLR_SSPND_CHNG_WAITER (((erts_aint32_t) 1) << 0)
#define ERTS_SCHDLR_SSPND_CHNG_MSB (((erts_aint32_t) 1) << 1)
#define ERTS_SCHDLR_SSPND_CHNG_ONLN (((erts_aint32_t) 1) << 2)
#ifndef DEBUG
#define ERTS_SCHDLR_SSPND_CHNG_SET(VAL, OLD_VAL) \
erts_smp_atomic32_set_nob(&schdlr_sspnd.changing, (VAL))
#else
#define ERTS_SCHDLR_SSPND_CHNG_SET(VAL, OLD_VAL) \
do { \
erts_aint32_t old_val__; \
old_val__ = erts_smp_atomic32_xchg_nob(&schdlr_sspnd.changing, \
(VAL)); \
ASSERT(old_val__ == (OLD_VAL)); \
} while (0)
#endif
static struct {
erts_smp_mtx_t mtx;
erts_smp_cnd_t cnd;
int online;
int curr_online;
int wait_curr_online;
erts_smp_atomic32_t changing;
erts_smp_atomic32_t active;
struct {
int ongoing;
long wait_active;
ErtsProcList *procs;
} msb; /* Multi Scheduling Block */
} schdlr_sspnd;
static struct {
erts_smp_mtx_t update_mtx;
erts_smp_atomic32_t no_runqs;
int last_active_runqs;
int forced_check_balance;
erts_smp_atomic32_t checking_balance;
int halftime;
int full_reds_history_index;
struct {
int active_runqs;
int reds;
erts_aint32_t max_len;
} prev_rise;
Uint n;
} balance_info;
#define ERTS_BLNCE_SAVE_RISE(ACTIVE, MAX_LEN, REDS) \
do { \
balance_info.prev_rise.active_runqs = (ACTIVE); \
balance_info.prev_rise.max_len = (MAX_LEN); \
balance_info.prev_rise.reds = (REDS); \
} while (0)
#endif
erts_sched_stat_t erts_sched_stat;
#ifdef USE_THREADS
static erts_tsd_key_t sched_data_key;
#endif
erts_smp_rwmtx_t erts_proc_tab_rwmtx;
static erts_smp_atomic32_t function_calls;
#ifdef ERTS_SMP
static erts_smp_atomic32_t doing_sys_schedule;
static erts_smp_atomic32_t no_empty_run_queues;
#else /* !ERTS_SMP */
ErtsSchedulerData *erts_scheduler_data;
#endif
ErtsAlignedRunQueue *erts_aligned_run_queues;
Uint erts_no_run_queues;
ErtsAlignedSchedulerData *erts_aligned_scheduler_data;
typedef union {
ErtsSchedulerSleepInfo ssi;
char align[ERTS_ALC_CACHE_LINE_ALIGN_SIZE(sizeof(ErtsSchedulerSleepInfo))];
} ErtsAlignedSchedulerSleepInfo;
static ErtsAlignedSchedulerSleepInfo *aligned_sched_sleep_info;
static Uint last_reductions;
static Uint last_exact_reductions;
Uint erts_default_process_flags;
Eterm erts_system_monitor;
Eterm erts_system_monitor_long_gc;
Eterm erts_system_monitor_large_heap;
struct erts_system_monitor_flags_t erts_system_monitor_flags;
/* system performance monitor */
Eterm erts_system_profile;
struct erts_system_profile_flags_t erts_system_profile_flags;
#if ERTS_MAX_PROCESSES > 0x7fffffff
#error "Need to store process_count in another type"
#endif
static erts_smp_atomic32_t process_count;
typedef struct ErtsTermProcElement_ ErtsTermProcElement;
struct ErtsTermProcElement_ {
ErtsTermProcElement *next;
ErtsTermProcElement *prev;
int ix;
union {
struct {
Eterm pid;
Uint64 spawned;
Uint64 exited;
} process;
struct {
Uint64 interval;
} bif_invocation;
} u;
};
static struct {
ErtsTermProcElement *start;
ErtsTermProcElement *end;
} saved_term_procs;
ERTS_SCHED_PREF_QUICK_ALLOC_IMPL(misc_op_list,
ErtsMiscOpList,
10,
ERTS_ALC_T_MISC_OP_LIST)
ERTS_SCHED_PREF_QUICK_ALLOC_IMPL(proclist,
ErtsProcList,
200,
ERTS_ALC_T_PROC_LIST)
#define ERTS_SCHED_SLEEP_INFO_IX(IX) \
(ASSERT_EXPR(-1 <= ((int) (IX)) \
&& ((int) (IX)) < ((int) erts_no_schedulers)), \
&aligned_sched_sleep_info[(IX)].ssi)
#define ERTS_FOREACH_RUNQ(RQVAR, DO) \
do { \
ErtsRunQueue *RQVAR; \
int ix__; \
for (ix__ = 0; ix__ < erts_no_run_queues; ix__++) { \
RQVAR = ERTS_RUNQ_IX(ix__); \
erts_smp_runq_lock(RQVAR); \
{ DO; } \
erts_smp_runq_unlock(RQVAR); \
} \
} while (0)
#define ERTS_FOREACH_OP_RUNQ(RQVAR, DO) \
do { \
ErtsRunQueue *RQVAR; \
int ix__; \
ERTS_SMP_LC_ASSERT(erts_smp_lc_mtx_is_locked(&schdlr_sspnd.mtx)); \
for (ix__ = 0; ix__ < schdlr_sspnd.online; ix__++) { \
RQVAR = ERTS_RUNQ_IX(ix__); \
erts_smp_runq_lock(RQVAR); \
{ DO; } \
erts_smp_runq_unlock(RQVAR); \
} \
} while (0)
#define ERTS_ATOMIC_FOREACH_RUNQ_X(RQVAR, DO, DOX) \
do { \
ErtsRunQueue *RQVAR; \
int ix__; \
for (ix__ = 0; ix__ < erts_no_run_queues; ix__++) { \
RQVAR = ERTS_RUNQ_IX(ix__); \
erts_smp_runq_lock(RQVAR); \
{ DO; } \
} \
{ DOX; } \
for (ix__ = 0; ix__ < erts_no_run_queues; ix__++) \
erts_smp_runq_unlock(ERTS_RUNQ_IX(ix__)); \
} while (0)
#define ERTS_ATOMIC_FOREACH_RUNQ(RQVAR, DO) \
ERTS_ATOMIC_FOREACH_RUNQ_X(RQVAR, DO, )
/*
* Local functions.
*/
static void init_processes_bif(void);
static void save_terminating_process(Process *p);
static void exec_misc_ops(ErtsRunQueue *);
static void print_function_from_pc(int to, void *to_arg, BeamInstr* x);
static int stack_element_dump(int to, void *to_arg, Process* p, Eterm* sp,
int yreg);
static void aux_work_timeout(void *unused);
static void aux_work_timeout_early_init(int no_schedulers);
static void aux_work_timeout_late_init(void);
static void setup_aux_work_timer(void);
#if defined(DEBUG) || 0
#define ERTS_DBG_CHK_AUX_WORK_VAL(V) dbg_chk_aux_work_val((V))
static void
dbg_chk_aux_work_val(erts_aint32_t value)
{
erts_aint32_t valid = 0;
valid |= ERTS_SSI_AUX_WORK_SET_TMO;
valid |= ERTS_SSI_AUX_WORK_MISC;
valid |= ERTS_SSI_AUX_WORK_FIX_ALLOC_LOWER_LIM;
valid |= ERTS_SSI_AUX_WORK_FIX_ALLOC_DEALLOC;
#if ERTS_USE_ASYNC_READY_Q
valid |= ERTS_SSI_AUX_WORK_ASYNC_READY;
valid |= ERTS_SSI_AUX_WORK_ASYNC_READY_CLEAN;
#endif
#ifdef ERTS_SMP
valid |= ERTS_SSI_AUX_WORK_MISC_THR_PRGR;
valid |= ERTS_SSI_AUX_WORK_DD;
valid |= ERTS_SSI_AUX_WORK_DD_THR_PRGR;
#endif
#if HAVE_ERTS_MSEG
valid |= ERTS_SSI_AUX_WORK_MSEG_CACHE_CHECK;
#endif
#ifdef ERTS_SMP_SCHEDULERS_NEED_TO_CHECK_CHILDREN
valid |= ERTS_SSI_AUX_WORK_CHECK_CHILDREN;
#endif
#ifdef ERTS_SMP
valid |= ERTS_SSI_AUX_WORK_CODE_IX_ACTIVATION;
valid |= ERTS_SSI_AUX_WORK_FINISH_BP;
#endif
#ifdef ERTS_SSI_AUX_WORK_REAP_PORTS
valid |= ERTS_SSI_AUX_WORK_REAP_PORTS;
#endif
if (~valid & value)
erl_exit(ERTS_ABORT_EXIT,
"Invalid aux_work value found: 0x%x\n",
~valid & value);
}
#define ERTS_DBG_CHK_SSI_AUX_WORK(SSI) \
ERTS_DBG_CHK_AUX_WORK_VAL(erts_atomic32_read_nob(&(SSI)->aux_work))
#else
#define ERTS_DBG_CHK_AUX_WORK_VAL(V)
#define ERTS_DBG_CHK_SSI_AUX_WORK(SSI)
#endif
#ifdef ERTS_SMP
static void handle_pending_exiters(ErtsProcList *);
#endif
#if defined(ERTS_SMP) && defined(ERTS_ENABLE_LOCK_CHECK)
int
erts_smp_lc_runq_is_locked(ErtsRunQueue *runq)
{
return erts_smp_lc_mtx_is_locked(&runq->mtx);
}
#endif
static erts_interval_t *proc_interval;
static void
proc_interval_init(void)
{
proc_interval = erts_alloc_permanent_cache_aligned(
ERTS_ALC_T_PROC_INTERVAL,
sizeof(erts_interval_t));
erts_smp_interval_init(proc_interval);
}
static ERTS_INLINE Uint64
get_proc_interval(void)
{
return erts_smp_current_interval_nob(proc_interval);
}
static ERTS_INLINE Uint64
ensure_later_proc_interval(Uint64 interval)
{
return erts_smp_ensure_later_interval_nob(proc_interval, interval);
}
static ERTS_INLINE Uint64
step_proc_interval(void)
{
return erts_smp_step_interval_nob(proc_interval);
}
Uint64
erts_get_proc_interval(void)
{
return get_proc_interval();
}
Uint64
erts_ensure_later_proc_interval(Uint64 interval)
{
return ensure_later_proc_interval(interval);
}
Uint64
erts_step_proc_interval(void)
{
return step_proc_interval();
}
void
erts_pre_init_process(void)
{
#ifdef USE_THREADS
erts_tsd_key_create(&sched_data_key);
#endif
#ifdef ERTS_ENABLE_LOCK_CHECK
{
int ix;
erts_psd_required_locks[ERTS_PSD_ERROR_HANDLER].get_locks
= ERTS_PSD_ERROR_HANDLER_BUF_GET_LOCKS;
erts_psd_required_locks[ERTS_PSD_ERROR_HANDLER].set_locks
= ERTS_PSD_ERROR_HANDLER_BUF_SET_LOCKS;
erts_psd_required_locks[ERTS_PSD_SAVED_CALLS_BUF].get_locks
= ERTS_PSD_SAVED_CALLS_BUF_GET_LOCKS;
erts_psd_required_locks[ERTS_PSD_SAVED_CALLS_BUF].set_locks
= ERTS_PSD_SAVED_CALLS_BUF_SET_LOCKS;
erts_psd_required_locks[ERTS_PSD_SCHED_ID].get_locks
= ERTS_PSD_SCHED_ID_GET_LOCKS;
erts_psd_required_locks[ERTS_PSD_SCHED_ID].set_locks
= ERTS_PSD_SCHED_ID_SET_LOCKS;
erts_psd_required_locks[ERTS_PSD_DIST_ENTRY].get_locks
= ERTS_PSD_DIST_ENTRY_GET_LOCKS;
erts_psd_required_locks[ERTS_PSD_DIST_ENTRY].set_locks
= ERTS_PSD_DIST_ENTRY_SET_LOCKS;
erts_psd_required_locks[ERTS_PSD_CALL_TIME_BP].get_locks
= ERTS_PSD_CALL_TIME_BP_GET_LOCKS;
erts_psd_required_locks[ERTS_PSD_CALL_TIME_BP].set_locks
= ERTS_PSD_CALL_TIME_BP_SET_LOCKS;
/* Check that we have locks for all entries */
for (ix = 0; ix < ERTS_PSD_SIZE; ix++) {
ERTS_SMP_LC_ASSERT(erts_psd_required_locks[ix].get_locks);
ERTS_SMP_LC_ASSERT(erts_psd_required_locks[ix].set_locks);
}
}
#endif
}
/* initialize the scheduler */
void
erts_init_process(int ncpu)
{
int proc_tab_sz;
int max_proc_bits;
int proc_bits = ERTS_PROC_BITS;
erts_smp_atomic_t *proc_entry;
char *proc_tab_end;
erts_smp_rwmtx_opt_t proc_tab_rwmtx_opts = ERTS_SMP_RWMTX_OPT_DEFAULT_INITER;
proc_tab_rwmtx_opts.type = ERTS_SMP_RWMTX_TYPE_EXTREMELY_FREQUENT_READ;
proc_tab_rwmtx_opts.lived = ERTS_SMP_RWMTX_LONG_LIVED;
proc_interval_init();
#ifdef ERTS_SMP
erts_disable_proc_not_running_opt = 0;
erts_init_proc_lock(ncpu);
#endif
init_proclist_alloc();
erts_smp_atomic32_init_nob(&process_count, 0);
if (erts_use_r9_pids_ports)
proc_bits = ERTS_R9_PROC_BITS;
if (erts_proc.max > (1 << proc_bits))
erts_proc.max = 1 << proc_bits;
proc_tab_sz = ERTS_ALC_CACHE_LINE_ALIGN_SIZE(erts_proc.max
* sizeof(erts_smp_atomic_t));
erts_proc.tab = erts_alloc(ERTS_ALC_T_PROC_TABLE, proc_tab_sz);
proc_tab_end = ((char *) erts_proc.tab) + proc_tab_sz;
proc_entry = erts_proc.tab;
while (proc_tab_end > ((char *) proc_entry)) {
erts_smp_atomic_init_nob(proc_entry, ERTS_AINT_NULL);
proc_entry++;
}
erts_smp_rwmtx_init_opt(&erts_proc_tab_rwmtx,
&proc_tab_rwmtx_opts,
"proc_tab");
last_pid_data_init_nob(~((Uint64) 0));
max_proc_bits = erts_fit_in_bits_int32((Sint32) erts_proc.max - 1);
erts_proc.tab_cache_lines = proc_tab_sz/ERTS_CACHE_LINE_SIZE;
erts_proc.pix_per_cache_line = ERTS_CACHE_LINE_SIZE/sizeof(erts_smp_atomic_t);
if ((erts_proc.max & (erts_proc.max - 1))
| (erts_proc.pix_per_cache_line & (erts_proc.pix_per_cache_line - 1))) {
/*
* erts_proc.max or erts_proc.pix_per_cache_line
* not a power of 2 :(
*/
erts_proc.pix_cl_mask = 0;
erts_proc.pix_cl_shift = 0;
erts_proc.pix_cli_mask = 0;
erts_proc.pix_cli_shift = 0;
}
else {
ASSERT((erts_proc.tab_cache_lines
& (erts_proc.tab_cache_lines - 1)) == 0);
erts_proc.pix_cl_mask = erts_proc.tab_cache_lines-1;
erts_proc.pix_cl_shift = erts_fit_in_bits_int32(erts_proc.pix_per_cache_line-1);
erts_proc.pix_cli_shift = erts_fit_in_bits_int32(erts_proc.pix_cl_mask);
erts_proc.pix_cli_mask = (1 << (max_proc_bits - erts_proc.pix_cli_shift)) - 1;
}
last_reductions = 0;
last_exact_reductions = 0;
erts_default_process_flags = 0;
}
void
erts_late_init_process(void)
{
int ix;
init_processes_bif();
erts_smp_spinlock_init(&erts_sched_stat.lock, "sched_stat");
for (ix = 0; ix < ERTS_NO_PRIO_LEVELS; ix++) {
Eterm atom;
char *atom_str;
switch (ix) {
case PRIORITY_MAX:
atom_str = "process_max";
break;
case PRIORITY_HIGH:
atom_str = "process_high";
break;
case PRIORITY_NORMAL:
atom_str = "process_normal";
break;
case PRIORITY_LOW:
atom_str = "process_low";
break;
case ERTS_PORT_PRIO_LEVEL:
atom_str = "port";
break;
default:
atom_str = "bad_prio";
ASSERT(!"bad prio");
break;
}
atom = am_atom_put(atom_str, sys_strlen(atom_str));
erts_sched_stat.prio[ix].name = atom;
erts_sched_stat.prio[ix].total_executed = 0;
erts_sched_stat.prio[ix].executed = 0;
erts_sched_stat.prio[ix].total_migrated = 0;
erts_sched_stat.prio[ix].migrated = 0;
}
}
static void
init_sched_wall_time(ErtsSchedWallTime *swtp)
{
swtp->enabled = 0;
swtp->start = 0;
swtp->working.total = 0;
swtp->working.start = 0;
swtp->working.currently = 0;
}
static ERTS_INLINE Uint64
sched_wall_time_ts(void)
{
#ifdef HAVE_GETHRTIME
return (Uint64) sys_gethrtime();
#else
Uint64 res;
SysTimeval tv;
sys_gettimeofday(&tv);
res = (Uint64) tv.tv_sec*1000000;
res += (Uint64) tv.tv_usec;
return res;
#endif
}
static ERTS_INLINE void
sched_wall_time_change(ErtsSchedulerData *esdp, int working)
{
if (esdp->sched_wall_time.enabled) {
Uint64 ts = sched_wall_time_ts();
if (working) {
#ifdef DEBUG
ASSERT(!esdp->sched_wall_time.working.currently);
esdp->sched_wall_time.working.currently = 1;
#endif
ts -= esdp->sched_wall_time.start;
esdp->sched_wall_time.working.start = ts;
}
else {
#ifdef DEBUG
ASSERT(esdp->sched_wall_time.working.currently);
esdp->sched_wall_time.working.currently = 0;
#endif
ts -= esdp->sched_wall_time.start;
ts -= esdp->sched_wall_time.working.start;
esdp->sched_wall_time.working.total += ts;
}
}
}
typedef struct {
int set;
int enable;
Process *proc;
Eterm ref;
Eterm ref_heap[REF_THING_SIZE];
Uint req_sched;
erts_smp_atomic32_t refc;
} ErtsSchedWallTimeReq;
#if !HALFWORD_HEAP
ERTS_SCHED_PREF_QUICK_ALLOC_IMPL(swtreq,
ErtsSchedWallTimeReq,
5,
ERTS_ALC_T_SCHED_WTIME_REQ)
#else
static ERTS_INLINE ErtsSchedWallTimeReq *
swtreq_alloc(void)
{
return erts_alloc(ERTS_ALC_T_SCHED_WTIME_REQ,
sizeof(ErtsSchedWallTimeReq));
}
static ERTS_INLINE void
swtreq_free(ErtsSchedWallTimeReq *ptr)
{
erts_free(ERTS_ALC_T_SCHED_WTIME_REQ, ptr);
}
#endif
static void
reply_sched_wall_time(void *vswtrp)
{
Uint64 working = 0, total = 0;
ErtsSchedulerData *esdp = erts_get_scheduler_data();
ErtsSchedWallTimeReq *swtrp = (ErtsSchedWallTimeReq *) vswtrp;
ErtsProcLocks rp_locks = (swtrp->req_sched == esdp->no
? ERTS_PROC_LOCK_MAIN
: 0);
Process *rp = swtrp->proc;
Eterm ref_copy = NIL, msg;
Eterm *hp = NULL;
Eterm **hpp;
Uint sz, *szp;
ErlOffHeap *ohp = NULL;
ErlHeapFragment *bp = NULL;
ASSERT(esdp);
if (swtrp->set) {
if (!swtrp->enable && esdp->sched_wall_time.enabled)
esdp->sched_wall_time.enabled = 0;
else if (swtrp->enable && !esdp->sched_wall_time.enabled) {
Uint64 ts = sched_wall_time_ts();
esdp->sched_wall_time.enabled = 1;
esdp->sched_wall_time.start = ts;
esdp->sched_wall_time.working.total = 0;
esdp->sched_wall_time.working.start = 0;
esdp->sched_wall_time.working.currently = 1;
}
}
if (esdp->sched_wall_time.enabled) {
Uint64 ts = sched_wall_time_ts();
ASSERT(esdp->sched_wall_time.working.currently);
ts -= esdp->sched_wall_time.start;
total = ts;
ts -= esdp->sched_wall_time.working.start;
working = esdp->sched_wall_time.working.total + ts;
}
sz = 0;
hpp = NULL;
szp = &sz;
while (1) {
if (hpp)
ref_copy = STORE_NC(hpp, ohp, swtrp->ref);
else
*szp += REF_THING_SIZE;
if (swtrp->set)
msg = ref_copy;
else {
msg = (!esdp->sched_wall_time.enabled
? am_notsup
: erts_bld_tuple(hpp, szp, 3,
make_small(esdp->no),
erts_bld_uint64(hpp, szp, working),
erts_bld_uint64(hpp, szp, total)));
msg = erts_bld_tuple(hpp, szp, 2, ref_copy, msg);
}
if (hpp)
break;
hp = erts_alloc_message_heap(sz, &bp, &ohp, rp, &rp_locks);
szp = NULL;
hpp = &hp;
}
erts_queue_message(rp, &rp_locks, bp, msg, NIL
#ifdef USE_VM_PROBES
, NIL
#endif
);
if (swtrp->req_sched == esdp->no)
rp_locks &= ~ERTS_PROC_LOCK_MAIN;
if (rp_locks)
erts_smp_proc_unlock(rp, rp_locks);
erts_smp_proc_dec_refc(rp);
if (erts_smp_atomic32_dec_read_nob(&swtrp->refc) == 0)
swtreq_free(vswtrp);
}
Eterm
erts_sched_wall_time_request(Process *c_p, int set, int enable)
{
ErtsSchedulerData *esdp = ERTS_PROC_GET_SCHDATA(c_p);
Eterm ref;
ErtsSchedWallTimeReq *swtrp;
Eterm *hp;
if (!set && !esdp->sched_wall_time.enabled)
return THE_NON_VALUE;
swtrp = swtreq_alloc();
ref = erts_make_ref(c_p);
hp = &swtrp->ref_heap[0];
swtrp->set = set;
swtrp->enable = enable;
swtrp->proc = c_p;
swtrp->ref = STORE_NC(&hp, NULL, ref);
swtrp->req_sched = esdp->no;
erts_smp_atomic32_init_nob(&swtrp->refc,
(erts_aint32_t) erts_no_schedulers);
erts_smp_proc_add_refc(c_p, (Sint32) erts_no_schedulers);
#ifdef ERTS_SMP
if (erts_no_schedulers > 1)
erts_schedule_multi_misc_aux_work(1,
erts_no_schedulers,
reply_sched_wall_time,
(void *) swtrp);
#endif
reply_sched_wall_time((void *) swtrp);
return ref;
}
static ERTS_INLINE ErtsProcList *
proclist_create(Process *p)
{
ErtsProcList *plp = proclist_alloc();
ensure_later_proc_interval(p->started_interval);
plp->pid = p->id;
plp->started_interval = p->started_interval;
return plp;
}
static ERTS_INLINE void
proclist_destroy(ErtsProcList *plp)
{
proclist_free(plp);
}
static ERTS_INLINE int
proclist_same(ErtsProcList *plp, Process *p)
{
return plp->pid == p->id && plp->started_interval == p->started_interval;
}
ErtsProcList *