Messages in this thread | | | Date | Thu, 29 Apr 2004 11:05:54 -0700 (PDT) | From | Davide Libenzi <> | Subject | Re: scheduler latency |
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On Thu, 29 Apr 2004, Nick Piggin wrote:
> I've done some scheduler latency tests and come up with some > pretty plots, so I thought I'd post them. It is nicksched vs > mainline. > > Note: this is not realtime scheduling latency, but latency as > measured by my random program. It also does not indicate > interactivity, because the latencies measured were all under > 15ms which is probably below perception. Even if not, it > doesn't measure latency as you might see it. > > Finally, some of the tests involved me moving the mouse around, > so factor in by subliminal (or not) bias toward my scheduler. > > http://www.kerneltrap.org/~npiggin/schedlat3/index.html
Nick, when I did the SOFTRR hack, I also measured sched latencies using another measurement/load apps:
http://www.xmailserver.org/linux-patches/softrr.html
At the bottom you can find the measurement app (note: x86 only since it uses "rdtsc") and stressful (latency-wise) loads.
- Davide
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