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Commit 414bee9b authored by Venkatesh Pallipadi's avatar Venkatesh Pallipadi Committed by Ingo Molnar
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softirqs: Account ksoftirqd time as cpustat softirq 



softirq time in ksoftirqd context is not accounted in ns granularity
per cpu softirq stats, as we want that to be a part of ksoftirqd
exec_runtime.

Accounting them as softirq on /proc/stat separately.

Tested-by: default avatarShaun Ruffell <sruffell@digium.com>
Signed-off-by: default avatarVenkatesh Pallipadi <venki@google.com>
Signed-off-by: default avatarPeter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <1292980144-28796-6-git-send-email-venki@google.com>
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
parent abb74cef

kernel/sched.c

+8 −0
Original line number Diff line number Diff line
@@ -3686,6 +3686,14 @@ static void irqtime_account_process_tick(struct task_struct *p, int user_tick, 
		cpustat->irq = cputime64_add(cpustat->irq, tmp);

	} else if (irqtime_account_si_update()) {

		cpustat->softirq = cputime64_add(cpustat->softirq, tmp);

	} else if (this_cpu_ksoftirqd() == p) {

		/*

		 * ksoftirqd time do not get accounted in cpu_softirq_time.

		 * So, we have to handle it separately here.

		 * Also, p->stime needs to be updated for ksoftirqd.

		 */

		__account_system_time(p, cputime_one_jiffy, one_jiffy_scaled,

					&cpustat->softirq);

	} else if (user_tick) {

		account_user_time(p, cputime_one_jiffy, one_jiffy_scaled);

	} else if (p == rq->idle) {