Messages in this thread | | | Date | Tue, 21 Mar 2006 18:50:04 +0100 | From | Willy Tarreau <> | Subject | Re: interactive task starvation |
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On Wed, Mar 22, 2006 at 02:20:10AM +1100, Con Kolivas wrote: > On Wednesday 22 March 2006 01:17, Con Kolivas wrote: > > I actually believe the same effect can be had by a tiny > > modification to enable/disable the estimator anyway. > > Just for argument's sake it would look something like this. > > Cheers, > Con > --- > Add sysctl to enable/disable cpu scheduer interactivity estimator
At least, in May 2005, the equivalent of this patch I tested on 2.6.11.7 considerably improved responsiveness, but there was still this very annoying slowdown when the load increased. vmstat delays increased by one second every 10 processes. I retried again around 2.6.14 a few months ago, and it was the same. Perhaps Mike's code and other changes in 2.6-mm really fix the initial problem (array switching ?) and then only the interactivity boost is causing the remaining trouble ?
Cheers, Willy
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