Messages in this thread | | | From | "Rafael J. Wysocki" <> | Subject | Re: 2.6.9-rc1-mm1 | Date | Sat, 28 Aug 2004 00:29:29 +0200 |
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On Friday 27 of August 2004 23:54, Rick Lindsley wrote: > > Rafael, what baseline release are you comparing to? I should be able > > to provide some tools to measure the effect on updatedb directly for > > both 2.6.9-rc1 and your baseline (so long as it's 2.6-based) > > 2.6.8.1, for example. I'd like to compate it with the 2.6.9-rc1-mm1, > which contains the Nick's scheduler (2.6.9-rc1 has the same scheduler as > 2.6.8.1, AFAIK). > > Okay. A schedstats patch for 2.6.8.1 is available at > > http://eaglet.rain.com/rick/linux/schedstat/patches/schedstat-2.6.8.1 > or > http://oss.software.ibm.com/linux/patches/?patch_id=730 > > You can also pick up the program "latency.c" at > > http://eaglet.rain.com/rick/linux/schedstat/v9/latency.c > > With these two things in hand, you should be able to measure the latency > on 2.6.8.1 of a particular process. > > A patch is not necessary for 2.6.9-rc1-mm1 (schedstats is already in there) > but you will need to config the kernel to use it. Then retrieve a slightly > different latency.c: > > http://eaglet.rain.com/rick/linux/schedstat/v10/latency.c > > since 2.6.9-rc1-mm1 output format is different (as you noted, it's a > different scheduler.) Then you should be able to see if the latency of > a particular process (updatedb, for instance) changes.
Thanks a lot Rick, I'll give it a try tomorrow.
Regards, RJW
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