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author | Peter Zijlstra <a.p.zijlstra@chello.nl> | 2012-05-17 17:15:29 +0200 |
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committer | Ingo Molnar <mingo@kernel.org> | 2012-05-30 14:02:16 +0200 |
commit | 5aaa0b7a2ed5b12692c9ffb5222182bd558d3146 (patch) | |
tree | 0334762e9d0e773acf21e61c682f895c25201c89 /kernel/time | |
parent | 9f646389aa7727a2fd8f9ae6337b92af9cfbc264 (diff) | |
download | linux-5aaa0b7a2ed5b12692c9ffb5222182bd558d3146.tar.gz |
sched/nohz: Fix rq->cpu_load calculations some more
Follow up on commit 556061b00 ("sched/nohz: Fix rq->cpu_load[] calculations") since while that fixed the busy case it regressed the mostly idle case. Add a callback from the nohz exit to also age the rq->cpu_load[] array. This closes the hole where either there was no nohz load balance pass during the nohz, or there was a 'significant' amount of idle time between the last nohz balance and the nohz exit. So we'll update unconditionally from the tick to not insert any accidental 0 load periods while busy, and we try and catch up from nohz idle balance and nohz exit. Both these are still prone to missing a jiffy, but that has always been the case. Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: pjt@google.com Cc: Venkatesh Pallipadi <venki@google.com> Link: http://lkml.kernel.org/n/tip-kt0trz0apodbf84ucjfdbr1a@git.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'kernel/time')
-rw-r--r-- | kernel/time/tick-sched.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/kernel/time/tick-sched.c b/kernel/time/tick-sched.c index 6a3a5b9ff561..0c927cd85345 100644 --- a/kernel/time/tick-sched.c +++ b/kernel/time/tick-sched.c @@ -576,6 +576,7 @@ void tick_nohz_idle_exit(void) /* Update jiffies first */ select_nohz_load_balancer(0); tick_do_update_jiffies64(now); + update_cpu_load_nohz(); #ifndef CONFIG_VIRT_CPU_ACCOUNTING /* |