Messages in this thread | | | Date | Fri, 31 Jan 2003 11:04:17 -0800 | From | Andrew Morton <> | 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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