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| author | Rik van Riel <riel@redhat.com> | 2014-05-16 06:13:32 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2014-05-22 11:16:41 +0200 |
| commit | 096aa33863a5e48de52d2ff30e0801b7487944f4 (patch) | |
| tree | b226a5aabe9ba4f71f192c58a2ee549ddb499871 /drivers/cpuidle | |
| parent | sched/numa: Update migrate_improves/degrades_locality() (diff) | |
| download | linux-096aa33863a5e48de52d2ff30e0801b7487944f4.tar.xz linux-096aa33863a5e48de52d2ff30e0801b7487944f4.zip | |
sched/numa: Decay ->wakee_flips instead of zeroing
Affine wakeups have the potential to interfere with NUMA placement.
If a task wakes up too many other tasks, affine wakeups will get
disabled.
However, regardless of how many other tasks it wakes up, it gets
re-enabled once a second, potentially interfering with NUMA
placement of other tasks.
By decaying wakee_wakes in half instead of zeroing it, we can avoid
that problem for some workloads.
Signed-off-by: Rik van Riel <riel@redhat.com>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Cc: chegu_vinod@hp.com
Cc: umgwanakikbuti@gmail.com
Link: http://lkml.kernel.org/r/20140516001332.67f91af2@annuminas.surriel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'drivers/cpuidle')
0 files changed, 0 insertions, 0 deletions