* 2.6.23 performance regression
@ 2007-10-30 7:54 Lorenzo Allegrucci
2007-10-31 2:19 ` Nick Piggin
0 siblings, 1 reply; 3+ messages in thread
From: Lorenzo Allegrucci @ 2007-10-30 7:54 UTC (permalink / raw)
To: Ingo Molnar; +Cc: linux-kernel
Hi, sorry if this is a faq but reading
http://people.freebsd.org/~kris/scaling/7.0%20Preview.pdf (slides 17,
18)
looks like 2.6.23 is having a performance regression on MySQL and
PostgreSQL benchmarks. Has anyone investigated these?
--
Lorenzo
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: 2.6.23 performance regression
2007-10-30 7:54 2.6.23 performance regression Lorenzo Allegrucci
@ 2007-10-31 2:19 ` Nick Piggin
2007-10-31 9:55 ` Ingo Molnar
0 siblings, 1 reply; 3+ messages in thread
From: Nick Piggin @ 2007-10-31 2:19 UTC (permalink / raw)
To: Lorenzo Allegrucci, Björn; +Cc: Ingo Molnar, linux-kernel
On Tuesday 30 October 2007 18:54, Lorenzo Allegrucci wrote:
> Hi, sorry if this is a faq but reading
> http://people.freebsd.org/~kris/scaling/7.0%20Preview.pdf (slides 17,
> 18)
> looks like 2.6.23 is having a performance regression on MySQL and
> PostgreSQL benchmarks. Has anyone investigated these?
I think Ingo was looking into them. I'm just in the middle of
building a new setup to investigate some performance issues too,
so I hope to look at this.
Apparently it did go unnoticed during CFS testing, unfortunately.
Although now it has been brought to light, I think 2.6.24 is
supposed to be better (although it now gets worse on other things).
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: 2.6.23 performance regression
2007-10-31 2:19 ` Nick Piggin
@ 2007-10-31 9:55 ` Ingo Molnar
0 siblings, 0 replies; 3+ messages in thread
From: Ingo Molnar @ 2007-10-31 9:55 UTC (permalink / raw)
To: Nick Piggin; +Cc: Lorenzo Allegrucci, Bj?rn, linux-kernel, Peter Zijlstra
* Nick Piggin <nickpiggin@yahoo.com.au> wrote:
> On Tuesday 30 October 2007 18:54, Lorenzo Allegrucci wrote:
> > Hi, sorry if this is a faq but reading
> > http://people.freebsd.org/~kris/scaling/7.0%20Preview.pdf (slides 17,
> > 18)
> > looks like 2.6.23 is having a performance regression on MySQL and
> > PostgreSQL benchmarks. Has anyone investigated these?
>
> I think Ingo was looking into them. I'm just in the middle of building
> a new setup to investigate some performance issues too, so I hope to
> look at this.
>
> Apparently it did go unnoticed during CFS testing, unfortunately.
> Although now it has been brought to light, I think 2.6.24 is supposed
> to be better (although it now gets worse on other things).
yep. For those who fear the 1 million lines of code flux of 2.6.24,
here's a backport of the scheduler changes to 2.6.23:
http://people.redhat.com/mingo/cfs-scheduler/devel/sched-cfs-v2.6.23.1-v22.1-rc0.patch
Lorenzo, could you please try that report back your reports? Thanks,
Ingo
^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2007-10-31 9:55 UTC | newest]
Thread overview: 3+ messages (download: mbox.gz / follow: Atom feed)
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2007-10-30 7:54 2.6.23 performance regression Lorenzo Allegrucci
2007-10-31 2:19 ` Nick Piggin
2007-10-31 9:55 ` Ingo Molnar
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