Commit-ID: 799e2205ec65e174f752b558c62a92c4752df313 Gitweb: http://git.kernel.org/tip/799e2205ec65e174f752b558c62a92c4752df313 Author: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx> AuthorDate: Fri, 9 Oct 2009 12:16:40 +0200 Committer: Ingo Molnar <mingo@xxxxxxx> CommitDate: Wed, 14 Oct 2009 15:02:34 +0200 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@xxxxxxxxxxxxxxx> Signed-off-by: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx> CC: Mike Galbraith <efault@xxxxxx> LKML-Reference: <1255083400.8802.15.camel@laptop> Signed-off-by: Ingo Molnar <mingo@xxxxxxx> --- arch/x86/include/asm/topology.h | 1 + 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 25a9284..d823c24 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 fc0bf3e..57e6357 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 \ -- To unsubscribe from this list: send the line "unsubscribe linux-tip-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
|