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Date: Fri, 10 Oct 2008 13:42:45 +0200
From: Ingo Molnar <mingo@...e.hu>
To: Evgeniy Polyakov <s0mbre@...rvice.net.ru>
Cc: Peter Zijlstra <a.p.zijlstra@...llo.nl>,
linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
David Miller <davem@...emloft.net>,
Mike Galbraith <efault@....de>
Subject: Re: [tbench regression fixes]: digging out smelly deadmen.
* Evgeniy Polyakov <s0mbre@...rvice.net.ru> wrote:
> > i'm glad that you are looking into this! That is an SMP box, right?
> > If yes then could you try this sched-domains tuning utility i have
> > written yesterday (incidentally):
> >
> > http://redhat.com/~mingo/cfs-scheduler/tune-sched-domains
>
> I've removed SD_BALANCE_NEWIDLE:
> # ./tune-sched-domains $[191-2]
> And got noticeble improvement (each new line has fixes from previous):
>
> vanilla 27: 347.222
> no TSO/GSO: 357.331
> no hrticks: 382.983
> no balance: 389.802
okay. The target is 470 MB/sec, right? (Assuming the workload is sane
and 'fixing' it does not mean we have to schedule worse.)
We are still way off from 470 MB/sec.
Ingo
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