Re: Linux 2.6.23

Ingo Molnar
2007-10-12T05:46:36Z

* Nick Piggin <nickpiggin@yahoo.com.au> wrote:

> ;) I think you snipped the important bit:
>
> "the peak is terrible but it has virtually no dropoff and performs
> better under load than the default 2.6.21 scheduler." (verbatim)

hm, i understood that peak remark to be in reference to FreeBSD's
scheduler (which the FreeBSD guys are primarily interested in
obviously), not v2.6.21 - but i could be wrong.

In any case, there is indeed a regression with sysbench and a low number
of threads, and it's being fixed. The peak got improved visibly in
sched-devel:

http://people.redhat.com/mingo/misc/sysbench-sched-devel.jpg

but there is still some peak regression left, i'm testing a patch for
that.

Ingo