linux-master/kernel/taskstats.c

157 static void exe_add_tsk(struct taskstats *stats, struct task_struct *tsk)
160 	struct file *exe_file = get_task_exe_file(tsk);
176 		       struct task_struct *tsk, struct taskstats *stats)
183 	 *	per-task-foo(stats, tsk);
186 	delayacct_add_tsk(stats, tsk);
190 	stats->nvcsw = tsk->nvcsw;
191 	stats->nivcsw = tsk->nivcsw;
192 	bacct_add_tsk(user_ns, pid_ns, stats, tsk);
195 	xacct_add_tsk(stats, tsk);
198 	exe_add_tsk(stats, tsk);
203 	struct task_struct *tsk;
205 	tsk = find_get_task_by_vpid(pid);
206 	if (!tsk)
208 	fill_stats(current_user_ns(), task_active_pid_ns(current), tsk, stats);
209 	put_task_struct(tsk);
215 	struct task_struct *tsk, *first;
237 	for_each_thread(first, tsk) {
238 		if (tsk->exit_state)
244 		 *	per-task-foo(stats, tsk);
246 		delayacct_add_tsk(stats, tsk);
249 		delta = start_time - tsk->start_time;
254 		task_cputime(tsk, &utime, &stime);
258 		stats->nvcsw += tsk->nvcsw;
259 		stats->nivcsw += tsk->nivcsw;
275 static void fill_tgid_exit(struct task_struct *tsk)
279 	spin_lock_irqsave(&tsk->sighand->siglock, flags);
280 	if (!tsk->signal->stats)
285 	 * accumalate its per-task stats for tsk, into the per-tgid structure
287 	 *	per-task-foo(tsk->signal->stats, tsk);
289 	delayacct_add_tsk(tsk->signal->stats, tsk);
291 	spin_unlock_irqrestore(&tsk->sighand->siglock, flags);
571 static struct taskstats *taskstats_tgid_alloc(struct task_struct *tsk)
573 	struct signal_struct *sig = tsk->signal;
578 	if (stats || thread_group_empty(tsk))
584 	spin_lock_irq(&tsk->sighand->siglock);
595 	spin_unlock_irq(&tsk->sighand->siglock);
604 void taskstats_exit(struct task_struct *tsk, int group_dead)
621 	is_thread_group = !!taskstats_tgid_alloc(tsk);
625 		/* fill the tsk->signal->stats structure */
626 		fill_tgid_exit(tsk);
638 			 task_pid_nr_ns(tsk, &init_pid_ns));
642 	fill_stats(&init_user_ns, &init_pid_ns, tsk, stats);
647 	 * Doesn't matter if tsk is the leader or the last group member leaving
653 			 task_tgid_nr_ns(tsk, &init_pid_ns));
657 	memcpy(stats, tsk->signal->stats, sizeof(*stats));