Messages in this thread | | | Subject | Re: 2.6.9-rc1-mm1 | Date | Fri, 27 Aug 2004 14:54:18 -0700 | From | Rick Lindsley <> |
| |
> 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.
Rick - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |