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 /include/linux/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 'include/linux/topology.h')
| -rw-r--r-- | include/linux/topology.h | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/include/linux/topology.h b/include/linux/topology.h index fe2c0329f82f..66774fddec9b 100644 --- a/include/linux/topology.h +++ b/include/linux/topology.h | |||
| @@ -126,7 +126,7 @@ int arch_update_cpu_topology(void); | |||
| 126 | .forkexec_idx = 1, \ | 126 | .forkexec_idx = 1, \ |
| 127 | \ | 127 | \ |
| 128 | .flags = 1*SD_LOAD_BALANCE \ | 128 | .flags = 1*SD_LOAD_BALANCE \ |
| 129 | | 0*SD_BALANCE_NEWIDLE \ | 129 | | 1*SD_BALANCE_NEWIDLE \ |
| 130 | | 1*SD_BALANCE_EXEC \ | 130 | | 1*SD_BALANCE_EXEC \ |
| 131 | | 1*SD_BALANCE_FORK \ | 131 | | 1*SD_BALANCE_FORK \ |
| 132 | | 0*SD_WAKE_IDLE \ | 132 | | 0*SD_WAKE_IDLE \ |
| @@ -160,7 +160,7 @@ int arch_update_cpu_topology(void); | |||
| 160 | .forkexec_idx = 1, \ | 160 | .forkexec_idx = 1, \ |
| 161 | \ | 161 | \ |
| 162 | .flags = 1*SD_LOAD_BALANCE \ | 162 | .flags = 1*SD_LOAD_BALANCE \ |
| 163 | | 0*SD_BALANCE_NEWIDLE \ | 163 | | 1*SD_BALANCE_NEWIDLE \ |
| 164 | | 1*SD_BALANCE_EXEC \ | 164 | | 1*SD_BALANCE_EXEC \ |
| 165 | | 1*SD_BALANCE_FORK \ | 165 | | 1*SD_BALANCE_FORK \ |
| 166 | | 0*SD_WAKE_IDLE \ | 166 | | 0*SD_WAKE_IDLE \ |