On 16 August 2012 07:03, Alex Shi <alex....@intel.com> wrote: > On 08/16/2012 12:19 AM, Matthew Garrett wrote: > >> On Mon, Aug 13, 2012 at 08:21:00PM +0800, Alex Shi wrote: >> >>> power aware scheduling), this proposal will adopt the >>> sched_balance_policy concept and use 2 kind of policy: performance, power. >> >> Are there workloads in which "power" might provide more performance than >> "performance"? If so, don't use these terms. >> > > > Power scheme should no chance has better performance in design.
A side effect of packing small tasks on one core is that you always use the core with the lowest C-state which will minimize the wake up latency so you can sometime get better results than performance mode which will try to use a other core in another cluster which will take more time to wake up that waiting for the end of the current task. Vincent -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
