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Date: Mon, 27 Oct 2008 14:42:55 +0100 (CET) From: Jiri Kosina <jkosina@...e.cz> To: Mike Galbraith <efault@....de> cc: Alan Cox <alan@...rguk.ukuu.org.uk>, Ingo Molnar <mingo@...e.hu>, Andrew Morton <akpm@...ux-foundation.org>, Peter Zijlstra <a.p.zijlstra@...llo.nl>, David Miller <davem@...emloft.net>, rjw@...k.pl, s0mbre@...rvice.net.ru, linux-kernel@...r.kernel.org, netdev@...r.kernel.org Subject: Re: [tbench regression fixes]: digging out smelly deadmen. On Mon, 27 Oct 2008, Mike Galbraith wrote: > > real world workloads. If your fairness hurts throughput that much maybe > > your scheduler algorithm is just plain *wrong* as it isn't adapting to > > workload at all well. > Doesn't seem to be scheduler/fairness. 2.6.22.19 is O(1), and falls > apart too, I posted the numbers and full dbench output yesterday. We'll need to look into this a little bit more I think. I have sent out some numbers too, and these indicate very clearly that there is more than 50% performance drop (measured by dbench) just after the very merge of CFS in 2.6.23-rc1 merge window. -- Jiri Kosina SUSE Labs -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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