Re: FreeBSD 5.3 I/O Performance / Linux 2.6.10 | Continued Discussion

From: Arne (arne_woerner_at_yahoo.com)
Date: 01/25/05

  • Next message: Matthias Buelow: "Re: FreeBSD 5.3 I/O Performance / Linux 2.6.10 | Continued Discussion" 
    Date: Tue, 25 Jan 2005 12:19:46 -0800 (PST)
To: freebsd-performance@freebsd.org

    I did some tests with
    1. Knoppix V3.7 2004-12-08 (kernel version 2.4.27)
    and
    2. FreeBSD R5.3.

    I used the same harddisc slice for the tests (just the *ad1.sh
    scripts uses another slice, because I was curious; I do not know
    the results). hw.ata.wc was enabled.

    My findings are:
    1. Linux is much faster with "async" mount (somebody in this
    thread already mentioned that yesterday).
    2. FreeBSD with soft updates is much faster than Linux with sync
    mount.

    See
      http://home.tiscali.de/cmdr_faako/
    for further details (until 2005-01-27 00:00 Zulu Time (GMT+00)).

    Further research is necessary, if I wanted to find out, what
    async/sync mount means (especially in the case of enabled write
    cache?), or why async mount is much faster...

    -Arne

                    
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  • Next message: Matthias Buelow: "Re: FreeBSD 5.3 I/O Performance / Linux 2.6.10 | Continued Discussion"

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