taskstats: add e/u/stime for TGID command (8c733420) · Commits · 戴 / test

kernel/taskstats.c

+14 −0

Original line number	Diff line number	Diff line
		@@ -30,6 +30,7 @@
		#include <linux/pid_namespace.h>
		#include <net/genetlink.h>
		#include <linux/atomic.h>
		#include <linux/sched/cputime.h>

		/*
		* Maximum length of a cpumask that can be specified in
		@@ -210,6 +211,8 @@ static int fill_stats_for_tgid(pid_t tgid, struct taskstats *stats)
		struct task_struct tsk, first;
		unsigned long flags;
		int rc = -ESRCH;
		u64 delta, utime, stime;
		u64 start_time;

		/*
		* Add additional stats from live tasks except zombie thread group
		@@ -227,6 +230,7 @@ static int fill_stats_for_tgid(pid_t tgid, struct taskstats *stats)
		memset(stats, 0, sizeof(*stats));

		tsk = first;
		start_time = ktime_get_ns();
		do {
		if (tsk->exit_state)
		continue;
		@@ -238,6 +242,16 @@ static int fill_stats_for_tgid(pid_t tgid, struct taskstats *stats)
		*/
		delayacct_add_tsk(stats, tsk);

		/* calculate task elapsed time in nsec */
		delta = start_time - tsk->start_time;
		/* Convert to micro seconds */
		do_div(delta, NSEC_PER_USEC);
		stats->ac_etime += delta;

		task_cputime(tsk, &utime, &stime);
		stats->ac_utime += div_u64(utime, NSEC_PER_USEC);
		stats->ac_stime += div_u64(stime, NSEC_PER_USEC);

		stats->nvcsw += tsk->nvcsw;
		stats->nivcsw += tsk->nivcsw;
		} while_each_thread(first, tsk);