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Date: Fri, 31 Jan 2003 11:04:17 -0800
From: Andrew Morton <akpm@digeo.com>
To: Hans Reiser <reiser@namesys.com>
Cc: conman@kolivas.net, linux-kernel@vger.kernel.org
Subject: Re: [BENCHMARK] ext3, reiser, jfs, xfs effect on contest
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Hans Reiser <reiser@namesys.com> wrote:
>
> compilation is not an effective benchmark anymore, not for Linux 
> filesystems, they are all just too fast (or is it that the compilers are 
> too slow?....)
> 

The point of this test is to measure interactions, and fairness.

It answers the question "how much impact does heavy filesystem I/O have upon
other system activity?".

The "other system activity" in this test is a kernel compile.  That is a
fairly reasonable metric, because it is sensitive to latencies in servicing
reads and it is sensitive to inappropriate page replacement decisions.

A more appropriate foreground load might be opening a word processor and
composing a short letter to Aunt Nellie, but that's harder to automate.  We
expect that reduced kernel compilation time will correlate with lower-latency
letter writing.

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