Re: Nick's scheduler v18
From: Martin J. Bligh
Date: Thu Nov 13 2003 - 16:06:27 EST
> Average of 5 kernel compiles (make -j) on a 16-way 512KB cache NUMAQ gives
> bk14 bk14-v18
> real 83.5s 81.7s
> user 987.6s 992.5s
> sys 158.0s 142.3s
>
> Volanomark looks much better than mainline.
>
> More testing welcome.
-noint is just backing out the interactivity patch (part of your patch)
Not sure that's helping you much really, but maybe it conflicts with
your other stuff.
Kernbench: (make -j N vmlinux, where N = 2 x num_cpus)
Elapsed System User CPU
2.6.0-test9 45.28 100.19 568.01 1474.75
2.6.0-test9-noint 48.20 99.05 567.26 1389.00
2.6.0-test9-nick18 45.06 91.56 568.77 1467.50
Kernbench: (make -j N vmlinux, where N = 16 x num_cpus)
Elapsed System User CPU
2.6.0-test9 46.17 122.20 571.58 1501.00
2.6.0-test9-noint 46.43 117.96 577.60 1498.00
2.6.0-test9-nick18 46.90 109.05 589.77 1488.75
Kernbench: (make -j vmlinux, maximal tasks)
Elapsed System User CPU
2.6.0-test9 45.84 120.14 570.93 1507.00
2.6.0-test9-noint 47.42 123.52 582.91 1488.75
2.6.0-test9-nick18 46.83 110.70 588.91 1494.00
It seems that you're decreasing system time significantly, but increasing
user time if you have lots of tasks ... context switch thrash, maybe?
Would be interesting if you know which of the many patches in there make
the performance difference ... the whole thing is a bit too big to pick
up and maintain easily ;-)
M.
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