On 02/20/2013 09:32 PM, Peter Zijlstra wrote: > On Wed, 2013-02-20 at 11:49 +0100, Ingo Molnar wrote: > >> The changes look clean and reasoable, > > I don't necessarily agree, note that O(n^2) storage requirement that > Michael failed to highlight ;-)
Forgive me for not explain this point in cover, but it's really not a big deal in my opinion... And I'm going to apply Mike's suggestion, do allocation when cpu active, that will save some space :) Regards, Michael Wang > >> any ideas exactly *why* it speeds up? > > That is indeed the most interesting part.. There's two parts to > select_task_rq_fair(), the 'regular' affine wakeup path, and the > fork/exec find_idlest_goo() path. At the very least we need to quantify > which of these two parts contributes most to the speedup. > > In the power balancing discussion we already noted that the > find_idlest_goo() is in need of attention. > > -- > 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/ > -- 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/
