From: Venkatesh Pallipadi Date: Wed, 22 Dec 2010 01:09:04 +0000 (-0800) Subject: softirqs: Account ksoftirqd time as cpustat softirq X-Git-Tag: upstream/snapshot3+hdmi~11256^2~22 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=414bee9ba613adb3804965e2d84db32d0599f9c6;p=platform%2Fadaptation%2Frenesas_rcar%2Frenesas_kernel.git 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: Shaun Ruffell Signed-off-by: Venkatesh Pallipadi Signed-off-by: Peter Zijlstra LKML-Reference: <1292980144-28796-6-git-send-email-venki@google.com> Signed-off-by: Ingo Molnar --- diff --git a/kernel/sched.c b/kernel/sched.c index 2a3c979..8b718b5 100644 --- a/kernel/sched.c +++ b/kernel/sched.c @@ -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) {