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From: Andi Kleen <andi@firstfloor.org>
To: Nick Piggin <nickpiggin@yahoo.com.au>
Cc: Andi Kleen <andi@firstfloor.org>, Cyrus Massoumi <cyrusm@gmx.net>,
	Diego Calleja <diegocg@gmail.com>,
	Stephen Cuppett <cuppett@gmail.com>,
	linux-kernel@vger.kernel.org, mingo@elte.hu,
	a.p.zijlstra@chello.nl
Subject: Re: Performance versus FreeBSD 7.0
Date: Thu, 6 Mar 2008 14:12:30 +0100	[thread overview]
Message-ID: <20080306131230.GA24689@one.firstfloor.org> (raw)
In-Reply-To: <200803062353.07298.nickpiggin@yahoo.com.au>

> I think since the mmap_sem madvise problem was solved, the kernel
> didn't really have any further problems with this workload.

Good.

> It is doing a lot of context switches, no IO, and not a lot of

Yes sysbench is a pretty poor benchmark i think, especially
on systems with a lot of cores. I ran into this on some of my
own testing too. I don't think it makes too much
sense to tune for it seriously, but of course it doesn't hurt
when Linux does well on it anyways.

-Andi

  reply	other threads:[~2008-03-06 13:11 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-02-29 13:38 Stephen Cuppett
2008-02-29 14:54 ` Diego Calleja
2008-03-03 13:04   ` Nick Piggin
2008-03-03 19:02     ` Cyrus Massoumi
2008-03-03 19:24       ` Nick Piggin
2008-03-03 22:47         ` Cyrus Massoumi
2008-03-03 23:23       ` Andi Kleen
2008-03-04  5:51         ` Cyrus Massoumi
2008-03-06 12:53         ` Nick Piggin
2008-03-06 13:12           ` Andi Kleen [this message]
2008-03-03 12:34 ` Andi Kleen
2008-03-06 17:29 ` debian developer
2008-03-06 17:34   ` debian developer
     [not found] <a2dDb-60y-29@gated-at.bofh.it>
     [not found] ` <a2eSt-7UK-1@gated-at.bofh.it>
2009-01-25 10:07   ` Lx

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