diff options
| author | Peter Zijlstra <a.p.zijlstra@chello.nl> | 2012-05-17 17:15:29 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2012-05-30 14:02:16 +0200 |
| commit | 5aaa0b7a2ed5b12692c9ffb5222182bd558d3146 (patch) | |
| tree | 0334762e9d0e773acf21e61c682f895c25201c89 /include | |
| parent | sched/x86: Use cpu_llc_shared_mask(cpu) for coregroup_mask (diff) | |
| download | linux-5aaa0b7a2ed5b12692c9ffb5222182bd558d3146.tar.xz linux-5aaa0b7a2ed5b12692c9ffb5222182bd558d3146.zip | |
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 'include')
| -rw-r--r-- | include/linux/sched.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/sched.h b/include/linux/sched.h index f45c0b280b5d..d61e5977e517 100644 --- a/include/linux/sched.h +++ b/include/linux/sched.h @@ -145,6 +145,7 @@ extern unsigned long this_cpu_load(void); extern void calc_global_load(unsigned long ticks); +extern void update_cpu_load_nohz(void); extern unsigned long get_parent_ip(unsigned long addr); |