Re: [PATCH] Minor scheduler fix to get rid of skipping in xmms

[Steven Pratt <slpratt@austin.ibm.com>]

Nick Piggin wrote:

>
> Steven Pratt wrote:
>
>> Nick Piggin wrote:
>>
>>> Steven Pratt wrote:
>>>
>>>>
>>>> I gave this a try on the same setup that I am using for the 
>>>> regression tests and the scheduler tests for Andrew.  What I got 
>>>> was the following oops:
>>>
>>>
>>> Hi Steven,
>>> This is with the complete sched-rollup-v14.gz or sched-rollup-nopolicy?
>>
>>
>> This is with the complete sched-rollup-v14.gz.
>>
>
> OK, I've fixed a bug that might be causing that...
> Any chance you could grab my new version from:
> http://www.kerneltrap.org/~npiggin/v15/
> And give it another go. If you get an oops, could you make sure you've
> compiled with debugging info (-g), and use add2line on vmlinux using the
> crashing EIP, please?

Well, it oopsed the first time so I rebuilt with debugging on and it 
didn't die.  Not sure what debuggin info will do to the results, but 
since some of them went up I thought I'd let you see them anyway.  I 
might be out tomorrow so I might not be able to follow up until Monday.

SPECSDET
           2.6.0-test5 2.6.0-test5piggin
   Threads      Ops/sec      Ops/sec    %diff         diff    tolerance
---------- ------------ ------------ -------- ------------ ------------
         1         3232         3248     0.50        16.00        96.96
         4        11794        11606    -1.59      -188.00       353.82
        16        19008        18723    -1.50      -285.00       570.24
        64        18736        17679    -5.64     -1057.00       562.08  *
 

SPECJBB
            2.6.0-test5 2.6.0-test5piggin
  # of WHs      OPs/sec      OPs/sec    %diff         diff    tolerance
---------- ------------ ------------ -------- ------------ ------------
         1     10118.42     10100.65    -0.18       -17.77       303.55
         4     35316.38     35037.34    -0.79      -279.04      1059.49
         7     54126.17     54290.86     0.30       164.69      1623.79
        10     56906.64     56703.59    -0.36      -203.05      1707.20
        13     51589.86     55509.08     7.60      3919.22      1547.70  *
        16     41410.52     51366.41    24.04      9955.89      1242.32  *
        19     32944.48     33693.62     2.27       749.14       988.33

VOLANOMARK
            2.6.0-test5 2.6.0-test5piggin
               Msgs/sec     Msgs/sec    %diff         diff    tolerance
---------- ------------ ------------ -------- ------------ ------------
         1        40915        42606     4.13      1691.00      1227.45  *



Steve