On Thu, 26 Jan 2006 12:09:53 +1100
Peter Williams <[email protected]> wrote:
> I know that I've said this before but I've found the problem.
> Embarrassingly, it was a basic book keeping error (recently introduced
> and equivalent to getting nr_running wrong for each CPU) in the
> gathering of the statistics that I use. :-(
>
> The attached patch (applied on top of the PlugSched patch) should fix
> things. Could you test it please?
Ok, this one make a difference:
(transcode)
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
5774 paolo 34 0 116m 18m 2432 R 86.2 3.7 0:11.65 transcode
5788 paolo 32 0 51000 4472 1872 S 7.5 0.9 0:01.13 tcdecode
5797 paolo 29 0 4948 1468 372 D 3.2 0.3 0:00.30 dd
5781 paolo 33 0 19844 1092 880 S 1.0 0.2 0:00.10 tcdemux
5783 paolo 31 0 47964 2496 1956 S 0.7 0.5 0:00.08 tcdecode
5786 paolo 34 0 19840 1088 880 R 0.5 0.2 0:00.06 tcdemux
(sched_fooler)
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
5804 paolo 34 0 2396 292 228 R 35.7 0.1 0:12.84 a.out
5803 paolo 34 0 2392 288 228 R 30.5 0.1 0:11.49 a.out
5805 paolo 34 0 2392 288 228 R 30.2 0.1 0:10.70 a.out
5815 paolo 29 0 4948 1468 372 D 3.7 0.3 0:00.29 dd
5458 paolo 28 0 86656 21m 15m S 0.2 4.4 0:02.18 konsole
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
5804 paolo 34 0 2396 292 228 R 36.5 0.1 0:38.19 a.out
5803 paolo 34 0 2392 288 228 R 30.5 0.1 0:34.27 a.out
5805 paolo 34 0 2392 288 228 R 29.2 0.1 0:32.39 a.out
5829 paolo 34 0 4952 1472 372 R 3.2 0.3 0:00.35 dd
DD_TEST + sched_fooler: 512 MB --- ~20s instead of 16.6s
This is a clear improvement... however I wonder why DD priority
fluctuate going up even to 34 (the range is something like 29 <--->
34).
--
Paolo Ornati
Linux 2.6.16-rc1-plugsched on x86_64
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