diff options
| author | Albert Cahalan <albert.cahalan@ccur.com> | 2003-10-14 20:13:33 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@home.osdl.org> | 2003-10-14 20:13:33 -0700 |
| commit | c31bc22f82e85a4d47547ef1fe8a2642f65a3d2f (patch) | |
| tree | d32c8e1af25d1f284135e7f70101987b3443199b /fs/proc/array.c | |
| parent | 1590208444308de5c126d739b9e89b29961c3f10 (diff) | |
[PATCH] number of threads in /proc
Having the number-of-threads value easily available turns out to be very
important for procps performance.
The /proc/*/stat thing getting reused has been zero since the 2.2.xx
days, and was the seldom-used timeout value before that.
Diffstat (limited to 'fs/proc/array.c')
| -rw-r--r-- | fs/proc/array.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/fs/proc/array.c b/fs/proc/array.c index 1eba76a6f603..d26f6590bd05 100644 --- a/fs/proc/array.c +++ b/fs/proc/array.c @@ -226,6 +226,7 @@ static void collect_sigign_sigcatch(struct task_struct *p, sigset_t *ign, static inline char * task_sig(struct task_struct *p, char *buffer) { sigset_t pending, shpending, blocked, ignored, caught; + int num_threads = 0; sigemptyset(&pending); sigemptyset(&shpending); @@ -241,10 +242,13 @@ static inline char * task_sig(struct task_struct *p, char *buffer) shpending = p->signal->shared_pending.signal; blocked = p->blocked; collect_sigign_sigcatch(p, &ignored, &caught); + num_threads = atomic_read(&p->signal->count); spin_unlock_irq(&p->sighand->siglock); } read_unlock(&tasklist_lock); + buffer += sprintf(buffer, "Threads:\t%d\n", num_threads); + /* render them all */ buffer = render_sigset_t("SigPnd:\t", &pending, buffer); buffer = render_sigset_t("ShdPnd:\t", &shpending, buffer); @@ -296,6 +300,7 @@ int proc_pid_stat(struct task_struct *task, char * buffer) char state; int res; pid_t ppid; + int num_threads = 0; struct mm_struct *mm; state = *get_task_state(task); @@ -324,6 +329,7 @@ int proc_pid_stat(struct task_struct *task, char * buffer) read_lock(&tasklist_lock); if (task->sighand) { spin_lock_irq(&task->sighand->siglock); + num_threads = atomic_read(&task->signal->count); collect_sigign_sigcatch(task, &sigign, &sigcatch); spin_unlock_irq(&task->sighand->siglock); } @@ -338,7 +344,7 @@ int proc_pid_stat(struct task_struct *task, char * buffer) ppid = task->pid ? task->real_parent->pid : 0; read_unlock(&tasklist_lock); res = sprintf(buffer,"%d (%s) %c %d %d %d %d %d %lu %lu \ -%lu %lu %lu %lu %lu %ld %ld %ld %ld %ld %ld %llu %lu %ld %lu %lu %lu %lu %lu \ +%lu %lu %lu %lu %lu %ld %ld %ld %ld %d %ld %llu %lu %ld %lu %lu %lu %lu %lu \ %lu %lu %lu %lu %lu %lu %lu %lu %d %d %lu %lu\n", task->pid, task->comm, @@ -359,7 +365,7 @@ int proc_pid_stat(struct task_struct *task, char * buffer) jiffies_to_clock_t(task->cstime), priority, nice, - 0UL /* removed */, + num_threads, jiffies_to_clock_t(task->it_real_value), (unsigned long long) jiffies_64_to_clock_t(task->start_time - INITIAL_JIFFIES), |