diff options
| author | Peter Zijlstra <a.p.zijlstra@chello.nl> | 2009-10-09 12:16:40 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-10-14 15:02:34 +0200 |
| commit | 799e2205ec65e174f752b558c62a92c4752df313 (patch) | |
| tree | dc2438771be941b485f0da12a1ff177f0797e57b | |
| parent | sched: Fix missing kernel-doc notation (diff) | |
| download | linux-799e2205ec65e174f752b558c62a92c4752df313.tar.xz linux-799e2205ec65e174f752b558c62a92c4752df313.zip | |
sched: Disable SD_PREFER_LOCAL for MC/CPU domains
Yanmin reported that both tbench and hackbench were significantly
hurt by trying to keep tasks local on these domains, esp on small
cache machines.
So disable it in order to promote spreading outside of the cache
domains.
Reported-by: "Zhang, Yanmin" <yanmin_zhang@linux.intel.com>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
CC: Mike Galbraith <efault@gmx.de>
LKML-Reference: <1255083400.8802.15.camel@laptop>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
| -rw-r--r-- | arch/x86/include/asm/topology.h | 1 | ||||
| -rw-r--r-- | include/linux/topology.h | 4 |
2 files changed, 3 insertions, 2 deletions
diff --git a/arch/x86/include/asm/topology.h b/arch/x86/include/asm/topology.h index 25a92842dd99..d823c245f63b 100644 --- a/arch/x86/include/asm/topology.h +++ b/arch/x86/include/asm/topology.h @@ -143,6 +143,7 @@ extern unsigned long node_remap_size[]; | 1*SD_BALANCE_FORK \ | 0*SD_BALANCE_WAKE \ | 1*SD_WAKE_AFFINE \ + | 1*SD_PREFER_LOCAL \ | 0*SD_SHARE_CPUPOWER \ | 0*SD_POWERSAVINGS_BALANCE \ | 0*SD_SHARE_PKG_RESOURCES \ diff --git a/include/linux/topology.h b/include/linux/topology.h index fc0bf3edeb67..57e63579bfdd 100644 --- a/include/linux/topology.h +++ b/include/linux/topology.h @@ -129,7 +129,7 @@ int arch_update_cpu_topology(void); | 1*SD_BALANCE_FORK \ | 0*SD_BALANCE_WAKE \ | 1*SD_WAKE_AFFINE \ - | 1*SD_PREFER_LOCAL \ + | 0*SD_PREFER_LOCAL \ | 0*SD_SHARE_CPUPOWER \ | 1*SD_SHARE_PKG_RESOURCES \ | 0*SD_SERIALIZE \ @@ -162,7 +162,7 @@ int arch_update_cpu_topology(void); | 1*SD_BALANCE_FORK \ | 0*SD_BALANCE_WAKE \ | 1*SD_WAKE_AFFINE \ - | 1*SD_PREFER_LOCAL \ + | 0*SD_PREFER_LOCAL \ | 0*SD_SHARE_CPUPOWER \ | 0*SD_SHARE_PKG_RESOURCES \ | 0*SD_SERIALIZE \ |