diff options
| author | Paul Turner <pjt@google.com> | 2010-11-15 15:47:08 -0800 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2010-11-18 13:27:49 +0100 |
| commit | 3b3d190ec3683d568fd2ebaead5e1ec7f97b6e37 (patch) | |
| tree | 6839bc473200dcb69c5de998921684ac569ce18b /kernel/sched.c | |
| parent | c66eaf619c0c7937e9ded160ae83b5a7a6b19b56 (diff) | |
| download | lwn-3b3d190ec3683d568fd2ebaead5e1ec7f97b6e37.tar.gz lwn-3b3d190ec3683d568fd2ebaead5e1ec7f97b6e37.zip | |
sched: Implement demand based update_cfs_load()
When the system is busy, dilation of rq->next_balance makes lb->update_shares()
insufficiently frequent for threads which don't sleep (no dequeue/enqueue
updates). Adjust for this by making demand based updates based on the
accumulation of execution time sufficient to wrap our averaging window.
Signed-off-by: Paul Turner <pjt@google.com>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <20101115234938.291159744@google.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/sched.c')
| -rw-r--r-- | kernel/sched.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/kernel/sched.c b/kernel/sched.c index dadab4d13875..e914a716e1d4 100644 --- a/kernel/sched.c +++ b/kernel/sched.c @@ -353,9 +353,16 @@ struct cfs_rq { */ unsigned long h_load; + /* + * Maintaining per-cpu shares distribution for group scheduling + * + * load_stamp is the last time we updated the load average + * load_last is the last time we updated the load average and saw load + * load_unacc_exec_time is currently unaccounted execution time + */ u64 load_avg; u64 load_period; - u64 load_stamp, load_last; + u64 load_stamp, load_last, load_unacc_exec_time; unsigned long load_contribution; #endif |