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SubjectRe: [PATCH 2.5.53] NUMA scheduler (1/3)
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On Tue, 2003-01-07 at 03:27, Erich Focht wrote:
> Hi Michael and Martin,
>
> thanks a lot for the testing!
>
> I rechecked the changes and really don't see any reason for a
> slowdown. Michael's measurements seem to confirm that this is just a
> statistical effect. I suggest: when in doubt, do 10 kernel compiles
> instead of 5. A simple statistical error estimation as I did for
> schedbench might help, too. Guess I've sent you the script a while
> ago.
>
One more set of test results, this time including schedbench. Previous
runs did not have the cputimes_stat patch, so the schedbench numbers
were not particularly useful.

Kernbench:
Elapsed User System CPU
oldsched54 29.75s 287.02s 82.876s 1242.8%
sched54 29.112s 283.888s 82.84s 1259.4%
stock54 31.348s 303.134s 87.824s 1247.2%
sched50 29.96s 288.308s 83.606s 1240.8%
stock50 31.074s 303.664s 89.194s 1264.2%

Schedbench 4:
AvgUser Elapsed TotalUser TotalSys
oldsched54 20.44 37.41 81.81 0.93
sched54 22.03 34.90 88.15 0.75
stock54 49.35 57.53 197.45 0.86
sched50 22.00 35.50 88.04 0.86
stock50 27.18 45.99 108.75 0.87

Schedbench 8:
AvgUser Elapsed TotalUser TotalSys
oldsched54 31.98 51.59 255.88 1.93
sched54 27.95 37.12 223.66 1.50
stock54 43.14 62.97 345.18 2.12
sched50 32.05 46.81 256.45 1.81
stock50 44.75 63.68 358.09 2.55

Schedbench 16:
AvgUser Elapsed TotalUser TotalSys
oldsched54 58.39 80.29 934.38 4.30
sched54 55.37 69.58 886.10 3.79
stock54 66.00 81.25 1056.25 7.12
sched50 55.34 70.74 885.61 4.09
stock50 65.36 80.72 1045.94 5.92

Schedbench 32:
AvgUser Elapsed TotalUser TotalSys
oldsched54 54.53 119.71 1745.37 11.70
sched54 57.93 132.11 1854.01 10.74
stock54 77.81 173.26 2490.31 12.37
sched50 59.47 139.77 1903.37 10.24
stock50 84.51 194.89 2704.83 12.44

Schedbench 64:
AvgUser Elapsed TotalUser TotalSys
oldsched54 79.57 339.88 5093.31 20.74
sched54 72.91 308.87 4667.03 21.06
stock54 86.68 368.55 5548.57 25.73
sched50 63.55 276.81 4067.65 21.58
stock50 99.68 422.06 6380.04 25.92

Row names are the same as before (see below). Numbers seem to be
fairly consistent.

> I understand from your emails that the 2.5.53 patches apply and work
> for 2.5.54, therefore I'll wait for 2.5.55 with a rediff.

It is fine with me to wait for 2.5.55 to rediff. I'm getting patch
errors now with the cputime_stat patch, so a rediff of that with
2.5.55 would be handy (although I suppose I should quit being lazy
and just do that myself).
>
> Regards,
> Erich

Michael
>
>
> On Tuesday 07 January 2003 03:23, Michael Hohnbaum wrote:
> > On Sun, 2003-01-05 at 22:07, Martin J. Bligh wrote:
> > > >> > Kernbench:
> > > >> > Elapsed User System CPU
> > > >> > sched50 29.96s 288.308s 83.606s 1240.8%
> > > >> > sched52 29.836s 285.832s 84.464s 1240.4%
> > > >> > sched53 29.364s 284.808s 83.174s 1252.6%
> > > >> > stock50 31.074s 303.664s 89.194s 1264.2%
> > > >> > stock53 31.204s 306.224s 87.776s 1263.2%
> > > >
> > > > sched50 = linux 2.5.50 with the NUMA scheduler
> > > > sched52 = linux 2.5.52 with the NUMA scheduler
> > > > sched53 = linux 2.5.53 with the NUMA scheduler
> > > > stock50 = linux 2.5.50 without the NUMA scheduler
> > > > stock53 = linux 2.5.53 without the NUMA scheduler
> > >
> > > I was doing a slightly different test - Erich's old sched code vs the new
> > > both on 2.5.54, and seem to have a degredation.
> > >
> > > M.
> >
> > Martin,
> >
> > I ran 2.5.54 with an older version of Erich's NUMA scheduler and
> > with the version sent out for 2.5.53. Results were similar:
> >
> > Kernbench:
> > Elapsed User System CPU
> > sched54 29.112s 283.888s 82.84s 1259.4%
> > oldsched54 29.436s 286.942s 82.722s 1256.2%
> >
> > sched54 = linux 2.5.54 with the 2.5.53 version of the NUMA scheduler
> > oldsched54 = linux 2.5.54 with an earlier version of the NUMA scheduler
> >
> > The numbers for the new version are actually a touch better, but
> > close enough to be within a reasonable margin of error.
> >
> > I'll post numbers against stock 2.5.54 and include schedbench, tomorrow.
> >
> > Michael
>
>
--

Michael Hohnbaum 503-578-5486
hohnbaum@us.ibm.com T/L 775-5486

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