GIT: unionfs2-2.6.27.y: sched: fine-tune SD_MC_INIT
Erez Zadok
ezk at fsl.cs.sunysb.edu
Thu Aug 12 23:15:08 EDT 2010
commit ab0fcb9bdab0106011209d5c8b873bdf0fbd1955
Author: Mike Galbraith <efault at gmx.de>
Date: Fri Nov 7 15:26:50 2008 +0100
sched: fine-tune SD_MC_INIT
commit 14800984706bf6936bbec5187f736e928be5c218 upstream.
Tune SD_MC_INIT the same way as SD_CPU_INIT:
unset SD_BALANCE_NEWIDLE, and set SD_WAKE_BALANCE.
This improves vmark by 5%:
vmark 132102 125968 125497 messages/sec avg 127855.66 .984
vmark 139404 131719 131272 messages/sec avg 134131.66 1.033
Signed-off-by: Mike Galbraith <efault at gmx.de>
Acked-by: Peter Zijlstra <a.p.zijlstra at chello.nl>
Signed-off-by: Ingo Molnar <mingo at elte.hu>
Signed-off-by: Greg Kroah-Hartman <gregkh at suse.de>
diff --git a/include/linux/topology.h b/include/linux/topology.h
index 2158fc0..91835a7 100644
--- a/include/linux/topology.h
+++ b/include/linux/topology.h
@@ -120,10 +120,10 @@ void arch_update_cpu_topology(void);
.wake_idx = 1, \
.forkexec_idx = 1, \
.flags = SD_LOAD_BALANCE \
- | SD_BALANCE_NEWIDLE \
| SD_BALANCE_FORK \
| SD_BALANCE_EXEC \
| SD_WAKE_AFFINE \
+ | SD_WAKE_BALANCE \
| SD_SHARE_PKG_RESOURCES\
| BALANCE_FOR_MC_POWER, \
.last_balance = jiffies, \
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