Re: Nick's scheduler v16

[Nick Piggin <piggin@cyberone.com.au>]

Martin J. Bligh wrote:

>>I'm starting to do some large SMP / NUMA testing. Fixed and changed quite
>>a bit. It isn't too bad, although I'm only testing dbench, tbench, and
>>volanomark at the moment.
>>
>>These SMP and NUMA changes are not tied to my interactivity stuff, so its
>>possible they could get included if they turn out well. If you find any
>>problems with it (high end or interactivity), please let me know.
>>
>
>Interesting ... some things get getter, some worse:
>
>Kernbench: (make -j N vmlinux, where N = 2 x num_cpus)
>                              Elapsed      System        User         CPU
>              2.6.0-test8       45.20      100.97      566.65     1476.25
>         2.6.0-test8-nick       44.81       93.98      568.49     1477.50
>        2.6.0-test8-nick2       44.78       94.69      568.81     1482.00
>
>elapsed is a tiny bit faster, system is significantly less, but with
>higher parallelism:
>
>
>Kernbench: (make -j vmlinux, maximal tasks)
>                              Elapsed      System        User         CPU
>              2.6.0-test8       45.86      119.41      569.66     1502.00
>         2.6.0-test8-nick       47.00      112.75      590.40     1495.00
>        2.6.0-test8-nick2       47.11      112.86      590.31     1491.50
>
>elapsed is definitely worse now.
>

I'll see if I can reproduce this and work out what is going on.
Thanks Martin.