Re: [patch] voluntary-preempt-2.6.8.1-P9

K.R. Foley
2004-08-25T03:17:51Z

Ingo Molnar wrote:
> * Scott Wood <scott@timesys.com> wrote:
>
>
>>I have attached a port of the voluntary preempt patch to PPC and
>>PPC64. The patch is against P7, but it applies against P8 as well.
>
>
> thanks Scott, i've applied your patch to my tree - all the changes and
> improvements look good (except for a small compilation problem on x86,
> asm/time.h doesnt exist there - asm/rtc.h does). The resulting code
> booted fine on an SMP and on a UP x86 system. I've uploaded -P9:
>
> http://redhat.com/~mingo/voluntary-preempt/voluntary-preempt-2.6.8.1-P9
>
> (there are no other changes in -P9.)
>
> Ingo

latency trace of ~148 usec in scsi_request? I don't know if this is real
or not. Note the 79 usec here:

00000001 0.107ms (+0.079ms): sd_init_command (scsi_prep_fn)

Entire trace is here:

http://www.cybsft.com/testresults/2.6.8.1-P9/latency_trace7.txt

Is this possible? This is not the first time I have seen this. There is
another one here:

http://www.cybsft.com/testresults/2.6.8.1-P9/latency_trace5.txt

kr