diff options
author | Ingo Molnar <mingo@elte.hu> | 2009-09-04 05:32:54 -0400 |
---|---|---|
committer | Ingo Molnar <mingo@elte.hu> | 2009-09-04 05:52:54 -0400 |
commit | 840a0653100dbde599ae8ddf83fa214dfa5fd1aa (patch) | |
tree | 273ffb82cb6d6f48c35d94b68e54874451956001 /arch/x86/include/asm/topology.h | |
parent | 47734f89be0614b5acbd6a532390f9c72f019648 (diff) |
sched: Turn on SD_BALANCE_NEWIDLE
Start the re-tuning of the balancer by turning on newidle.
It improves hackbench performance and parallelism on a 4x4 box.
The "perf stat --repeat 10" measurements give us:
domain0 domain1
.......................................
-SD_BALANCE_NEWIDLE -SD_BALANCE_NEWIDLE:
2041.273208 task-clock-msecs # 9.354 CPUs ( +- 0.363% )
+SD_BALANCE_NEWIDLE -SD_BALANCE_NEWIDLE:
2086.326925 task-clock-msecs # 11.934 CPUs ( +- 0.301% )
+SD_BALANCE_NEWIDLE +SD_BALANCE_NEWIDLE:
2115.289791 task-clock-msecs # 12.158 CPUs ( +- 0.263% )
Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Andreas Herrmann <andreas.herrmann3@amd.com>
Cc: Andreas Herrmann <andreas.herrmann3@amd.com>
Cc: Gautham R Shenoy <ego@in.ibm.com>
Cc: Balbir Singh <balbir@in.ibm.com>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86/include/asm/topology.h')
-rw-r--r-- | arch/x86/include/asm/topology.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86/include/asm/topology.h b/arch/x86/include/asm/topology.h index be29eb81fb06..ef7bc7fc2528 100644 --- a/arch/x86/include/asm/topology.h +++ b/arch/x86/include/asm/topology.h | |||
@@ -142,7 +142,7 @@ extern unsigned long node_remap_size[]; | |||
142 | .forkexec_idx = SD_FORKEXEC_IDX, \ | 142 | .forkexec_idx = SD_FORKEXEC_IDX, \ |
143 | \ | 143 | \ |
144 | .flags = 1*SD_LOAD_BALANCE \ | 144 | .flags = 1*SD_LOAD_BALANCE \ |
145 | | 0*SD_BALANCE_NEWIDLE \ | 145 | | 1*SD_BALANCE_NEWIDLE \ |
146 | | 1*SD_BALANCE_EXEC \ | 146 | | 1*SD_BALANCE_EXEC \ |
147 | | 1*SD_BALANCE_FORK \ | 147 | | 1*SD_BALANCE_FORK \ |
148 | | 0*SD_WAKE_IDLE \ | 148 | | 0*SD_WAKE_IDLE \ |