Messages in this thread |  | | | Date | Fri, 10 Sep 2004 19:21:33 -0500 | | From | "K.R. Foley" <> | | Subject | Re: [patch] voluntary-preempt-2.6.9-rc1-bk12-R6 |
Lee Revell wrote: > On Fri, 2004-09-10 at 09:28, Ingo Molnar wrote: > >>* Andrew Morton <akpm@osdl.org> wrote: >> >> >>>diff -puN mm/vmscan.c~swapspace-layout-improvements mm/vmscan.c >>>--- 25/mm/vmscan.c~swapspace-layout-improvements 2004-06-03 21:32:51.087602712 -0700 >>>+++ 25-akpm/mm/vmscan.c 2004-06-03 21:32:51.102600432 -0700 >> > > OK, Andrew's patch seems to be an improvement. I can still cause > unbounded latencies, but these only seem to happen when we fill all > available RAM and swap space, at which point we start spending > milliseconds at a time in scan_swap_map: > >
I see much improved performance so far. Been running for about 3 hours and the highest latency I've seen thus far is ~260 usec and that was mmap not swap. The highest latency I've seen from swapping is ~198 and we have been in and out of swap at least several times. The latency trace can be seen here:
http://www.cybsft.com/testresults/2.6.9-rc1-bk12-S0/latencytrace1.txt
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