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

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Date:	Mon, 17 Nov 2008 12:16:41 -0800 (PST)
From:	David Miller <davem@...emloft.net>
To:	torvalds@...ux-foundation.org
Cc:	mingo@...e.hu, dada1@...mosbay.com, rjw@...k.pl,
	linux-kernel@...r.kernel.org, kernel-testers@...r.kernel.org,
	cl@...ux-foundation.org, efault@....de, a.p.zijlstra@...llo.nl,
	shemminger@...tta.com
Subject: Re: [Bug #11308] tbench regression on each kernel release from
 2.6.22 -&gt; 2.6.28

From: Linus Torvalds <torvalds@...ux-foundation.org>
Date: Mon, 17 Nov 2008 11:55:35 -0800 (PST)

> So try to figure out why his (better) profile doesn't match your 
> (inferior) one, instead of asking him to do stupid things. It's some 
> difference in architectures, likely: maybe the sparc timekeeping is crap, 
> maybe it's a cache issue and sparc caches are crap, maybe it's something 
> where Niagara (is it niagara) has some oddness that shows up because it 
> has that odd four-threads+four-cores or whatever.

It's on my workstation which is a much simpler 2 processor
UltraSPARC-IIIi (1.5Ghz) system.

And yes I will investigate, it's all I've been doing in my
spare time these past few weeks.
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