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authorFrederic Weisbecker <fweisbec@gmail.com>2017-01-31 04:09:38 +0100
committerIngo Molnar <mingo@kernel.org>2017-02-01 09:13:57 +0100
commitbe9095ed4fb3cf69e9fdf64e28ff6b5bd0ec7215 (patch)
treed4d362f6fe39f56050e7e5abd44232bb7adca9ba /kernel/sched/cputime.c
parent23244a5c8003d4154161a8289a7d3783b0237c08 (diff)
downloadlinux-be9095ed4fb3cf69e9fdf64e28ff6b5bd0ec7215.tar.bz2
sched/cputime: Push time to account_steal_time() in nsecs
This is one more step toward converting cputime accounting to pure nsecs. Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Fenghua Yu <fenghua.yu@intel.com> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rik van Riel <riel@redhat.com> Cc: Stanislaw Gruszka <sgruszka@redhat.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Tony Luck <tony.luck@intel.com> Cc: Wanpeng Li <wanpeng.li@hotmail.com> Link: http://lkml.kernel.org/r/1485832191-26889-23-git-send-email-fweisbec@gmail.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'kernel/sched/cputime.c')
-rw-r--r--kernel/sched/cputime.c11
1 files changed, 6 insertions, 5 deletions
diff --git a/kernel/sched/cputime.c b/kernel/sched/cputime.c
index 55d31c35833a..9a8028760930 100644
--- a/kernel/sched/cputime.c
+++ b/kernel/sched/cputime.c
@@ -207,11 +207,11 @@ void account_system_time(struct task_struct *p, int hardirq_offset,
* Account for involuntary wait time.
* @cputime: the cpu time spent in involuntary wait
*/
-void account_steal_time(cputime_t cputime)
+void account_steal_time(u64 cputime)
{
u64 *cpustat = kcpustat_this_cpu->cpustat;
- cpustat[CPUTIME_STEAL] += cputime_to_nsecs(cputime);
+ cpustat[CPUTIME_STEAL] += cputime;
}
/*
@@ -239,14 +239,15 @@ static __always_inline cputime_t steal_account_process_time(cputime_t maxtime)
#ifdef CONFIG_PARAVIRT
if (static_key_false(&paravirt_steal_enabled)) {
cputime_t steal_cputime;
- u64 steal;
+ u64 steal, rounded;
steal = paravirt_steal_clock(smp_processor_id());
steal -= this_rq()->prev_steal_time;
steal_cputime = min(nsecs_to_cputime(steal), maxtime);
- account_steal_time(steal_cputime);
- this_rq()->prev_steal_time += cputime_to_nsecs(steal_cputime);
+ rounded = cputime_to_nsecs(steal_cputime);
+ account_steal_time(rounded);
+ this_rq()->prev_steal_time += rounded;
return steal_cputime;
}