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Message-Id: <20090529210718.bef7a9c1.akpm@linux-foundation.org>
Date: Fri, 29 May 2009 21:07:18 -0700
From: Andrew Morton <akpm@...ux-foundation.org>
To: Diego Calleja <diegocg@...il.com>
Cc: linux-kernel@...r.kernel.org
Subject: Re: Performance regressions in 2.6.30-rc7?
On Thu, 28 May 2009 22:49:28 +0200 Diego Calleja <diegocg@...il.com> wrote:
> Hi, phoronix.com has run some benchmarks in 2.6.30-rc7 [1], there're some
> good numbers, but there's also a couple of regressions. Some people think
> that phoronix benchmarks are not very serious/reliable/meaningful, but i
> thought it'd be better to post false warnings than letting real regressions
> slip in without notice.
>
> The regressions would be:
> - 7zip MIPS ("7zr b" command) http://www.phoronix.com/data/img/results/linux_2630/1.png
>
> - tiobench latency (not throughput) using 64MB writes with 32 threads
> http://www.phoronix.com/data/img/results/linux_2630/7.png
>
> -gnupg 2GB file encryption http://www.phoronix.com/data/img/results/linux_2630/3.png
>
>
> Full article: http://www.phoronix.com/scan.php?page=article&item=linux_2630
Those regressions are huge. They appear to be on compute-intensive
workloads too.
I wonder if some expensive debugging option turned itself on or
something silly like that.
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