Messages in this thread | | | Date | Sat, 15 Feb 2003 13:07:43 +0100 | From | Mike Galbraith <> | Subject | Re: [PATCH] CFQ scheduler, #2 |
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At 09:49 AM 2/15/2003 -0200, Rik van Riel wrote: >On Sat, 15 Feb 2003, Mike Galbraith wrote: > > > >Judging from your log, it ends up stalling kswapd and > > >dramatically increases the number of times that normal > > >processes need to go into the pageout code. > > > > > >If this provides an anti-thrashing benefit, something's > > >wrong with the VM in 2.5 ;) > > > > Which number are you looking at? > >pgscan 2751953 5328260 <== ? hmm > >kswapd_steal 380282 522126 >pageoutrun 1107 1956 >allocstall 3472 1238 > >- we scan far less pages >- kswapd reclaims less pages >- we go into the pageout code less often >- allocations stall more often for a lack of free memory
I would interpret that differently. I would say we scan less because we don't need to scan as much, kswapd reclaims less for the same reason, and ditto for pageout ;-) The reduction in scans does seem _way_ high though...
wrt allocstall, I bet if I do a few runs, I'll see mucho variance there (could be wrong.. hunch)
-Mke
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