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| author | Venkatesh Pallipadi <venki@google.com> | 2010-12-21 17:09:04 -0800 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2011-01-26 12:33:22 +0100 |
| commit | 414bee9ba613adb3804965e2d84db32d0599f9c6 (patch) | |
| tree | 296a0f95ab5dd9c7ca8965639ab39f67c4187586 /kernel | |
| parent | abb74cefa9c682fb38ba86c17ca3c86fed6cc464 (diff) | |
| download | lwn-414bee9ba613adb3804965e2d84db32d0599f9c6.tar.gz lwn-414bee9ba613adb3804965e2d84db32d0599f9c6.zip | |
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 <sruffell@digium.com>
Signed-off-by: Venkatesh Pallipadi <venki@google.com>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <1292980144-28796-6-git-send-email-venki@google.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/sched.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/kernel/sched.c b/kernel/sched.c index 2a3c9799d76b..8b718b59b09f 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) { |