Messages in this thread | | | Subject | Re: [PATCH v3] sched/cputime: add steal time support to full dynticks CPU time accounting | From | Rik van Riel <> | Date | Tue, 24 May 2016 15:22:48 -0400 |
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On Wed, 2016-05-18 at 20:27 +0800, Wanpeng Li wrote: > From: Wanpeng Li <wanpeng.li@hotmail.com> > > This patch adds steal guest time support to full dynticks CPU > time accounting. After 'commit ff9a9b4c4334 ("sched, time: Switch > VIRT_CPU_ACCOUNTING_GEN to jiffy granularity")', time is jiffy > based sampling even if it's still listened to ring boundaries, so > steal_account_process_tick() is reused to account how much 'ticks' > are steal time after the last accumulation. > > Suggested-by: Rik van Riel <riel@redhat.com> > Cc: Ingo Molnar <mingo@kernel.org> > Cc: Peter Zijlstra (Intel) <peterz@infradead.org> > Cc: Rik van Riel <riel@redhat.com> > Cc: Thomas Gleixner <tglx@linutronix.de> > Cc: Frederic Weisbecker <fweisbec@gmail.com> > Cc: Paolo Bonzini <pbonzini@redhat.com> > Cc: Radim <rkrcmar@redhat.com> > Signed-off-by: Wanpeng Li <wanpeng.li@hotmail.com>
This also nicely fixes up f9c904b7613b ("sched/cputime: Fix steal_account_process_tick() to always return jiffies"), which relies on a bool function returning a certain number of jiffies :)
Reviewed-by: Rik van Riel <riel@redhat.com>
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