Messages in this thread | | | Date | Wed, 31 Oct 2007 10:55:17 +0100 | From | Ingo Molnar <> | Subject | Re: 2.6.23 performance regression |
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* 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 - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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