linux-kernel - Re: [Bug #11308] tbench regression on each kernel release from 2.6.22 -> 2.6.28

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Message-ID: <alpine.LFD.2.00.0811170937540.3468@nehalem.linux-foundation.org>
Date:	Mon, 17 Nov 2008 09:38:43 -0800 (PST)
From:	Linus Torvalds <torvalds@...ux-foundation.org>
To:	Eric Dumazet <dada1@...mosbay.com>
cc:	Ingo Molnar <mingo@...e.hu>, David Miller <davem@...emloft.net>,
	rjw@...k.pl, linux-kernel@...r.kernel.org,
	kernel-testers@...r.kernel.org, cl@...ux-foundation.org,
	efault@....de, a.p.zijlstra@...llo.nl,
	Stephen Hemminger <shemminger@...tta.com>
Subject: Re: [Bug #11308] tbench regression on each kernel release from 2.6.22
 -&gt; 2.6.28



On Mon, 17 Nov 2008, Eric Dumazet wrote:

> Ingo Molnar a écrit :

> > it gives a small speedup of ~1% on my box:
> > 
> >    before:      Throughput 3437.65 MB/sec 64 procs
> >    after:       Throughput 3473.99 MB/sec 64 procs
> 
> Strange, I get 2350 MB/sec on my 8 cpus box. "tbench 8"

I think Ingo may have a Nehalem. Let's just say that those things rock, 
and have rather good memory throughput.

		Linus
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