Messages in this thread | | | Date | Fri, 29 Jul 2005 13:26:16 +0200 | From | Ingo Molnar <> | Subject | Re: Delete scheduler SD_WAKE_AFFINE and SD_WAKE_BALANCE flags |
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* Chen, Kenneth W <kenneth.w.chen@intel.com> wrote:
> To demonstrate the problem, we turned off these two flags in the cpu > sd domain and measured a stunning 2.15% performance gain! And > deleting all the code in the try_to_wake_up() pertain to load > balancing gives us another 0.2% gain.
another thing: do you have a HT-capable ia64 CPU, and do you have CONFIG_SCHED_SMT turned on? If yes then could you try to turn off SD_WAKE_IDLE too, i found it to bring further performance improvements in certain workloads.
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