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| author | Gautham R Shenoy <ego@in.ibm.com> | 2009-03-25 09:14:17 (GMT) |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-03-25 09:30:48 (GMT) |
| commit | a021dc03376707c55a3483e32c16b8986d4414cc (patch) | |
| tree | a3d29953e30b8874e7191d29dc50c59f9ac4c809 /kernel/mutex.c | |
| parent | dbc523a3b86f9e1765b5e70e6886913b99cc5cec (diff) | |
| download | linux-fsl-qoriq-a021dc03376707c55a3483e32c16b8986d4414cc.tar.xz | |
sched: Optimize the !power_savings_balance during fbg()
Impact: cleanup, micro-optimization
We don't need to perform power_savings balance if either the
cpu is NOT_IDLE or if the sched_domain doesn't contain the
SD_POWERSAVINGS_BALANCE flag set.
Currently, we check for these conditions multiple number of
times, even though these variables don't change over the scope
of find_busiest_group().
Check once, and store the value in the already exiting
"power_savings_balance" variable.
Signed-off-by: Gautham R Shenoy <ego@in.ibm.com>
Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Suresh Siddha <suresh.b.siddha@intel.com>
Cc: "Balbir Singh" <balbir@in.ibm.com>
Cc: Nick Piggin <nickpiggin@yahoo.com.au>
Cc: "Dhaval Giani" <dhaval@linux.vnet.ibm.com>
Cc: Bharata B Rao <bharata@linux.vnet.ibm.com>
Cc: "Vaidyanathan Srinivasan" <svaidy@linux.vnet.ibm.com>
LKML-Reference: <20090325091417.13992.2657.stgit@sofia.in.ibm.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/mutex.c')
0 files changed, 0 insertions, 0 deletions