GIT: unionfs2-2.6.27.y: sched: fine-tune SD_SIBLING_INIT
Erez Zadok
ezk at fsl.cs.sunysb.edu
Thu Aug 12 23:15:09 EDT 2010
commit aa7659a10684907bec7c0c6887f8755767fb8dea
Author: Ingo Molnar <mingo at elte.hu>
Date: Fri Nov 7 16:09:23 2008 +0100
sched: fine-tune SD_SIBLING_INIT
commit 52c642f33b14bfa1b00ef2b68296effb34a573f3 upstream.
fine-tune the HT sched-domains parameters as well.
On a HT capable box, this increases lat_ctx performance from 23.87
usecs to 1.49 usecs:
# before
$ ./lat_ctx -s 0 2
"size=0k ovr=1.89
2 23.87
# after
$ ./lat_ctx -s 0 2
"size=0k ovr=1.84
2 1.49
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 91835a7..2565f4a 100644
--- a/include/linux/topology.h
+++ b/include/linux/topology.h
@@ -99,7 +99,7 @@ void arch_update_cpu_topology(void);
| SD_BALANCE_FORK \
| SD_BALANCE_EXEC \
| SD_WAKE_AFFINE \
- | SD_WAKE_IDLE \
+ | SD_WAKE_BALANCE \
| SD_SHARE_CPUPOWER, \
.last_balance = jiffies, \
.balance_interval = 1, \
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