On 04/10/2013 04:51 PM, Peter Zijlstra wrote: > On Wed, 2013-04-10 at 11:30 +0800, Michael Wang wrote: >> | 15 GB | 32 | 35918 | | 37632 | +4.77% | 47923 | +33.42% | >> 52241 | +45.45% > > So I don't get this... is wake_affine() once every milisecond _that_ > expensive? > > Seeing we get a 45%!! improvement out of once every 100ms that would > mean we're like spending 1/3rd of our time in wake_affine()? that's > preposterous. So what's happening?
Hi, Peter I think Mike has very well explained the reason why throttle bring us benefit and why the benefit looks so significant when interval get higher, could you please take a look at his mail and see whether it addressed this concern? And thanks Mike again for the excellent analysis :) Regards, Michael Wang > > > > -- > 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/
