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    SubjectRe: [2.6.16-gitX] heavy performance regression in ipw2200 wireless driver
    "Alessandro Suardi" <alessandro.suardi@gmail.com> wrote:
    >

    Pleeeeze try to cc the right people.

    > Driver - or firmware ? Don't know - since the new git snapshots run
    > 1.1.1 which requires newer firmware from http://ipw2200.sourceforge.net.
    >
    > Symptom -> my new FC5 partition with 2.6.16-git kernels connects via
    > VNC viewer to my bittorrent box over wireless (ipw2200 to a D-Link
    > G604T router/AP); Dell D610 runs FC5, BT box is a K7-800 running
    > FC3 with a 2.6.16-rc5-git8 kernel (15+ days uptime...).
    >
    > I also run Firefox on the bittorrent box; noticed today (2.6.16-git5) that
    > the screen refresh of pages with images was from time to time very
    > slow (close to unusable).
    >
    > Rebooted into my FC4 partition with a 2.6.16 kernel, everything much
    > snappier. So I ran a scp test from my BT server to the laptop, three
    > times in a row the same file - a 38MB .flac with the laptop in the same
    > physical position (ie, no signal variation). Results...
    >
    > FC5 - 2.6.16-git3:
    >
    > [asuardi@donkey melua_2004-09-23_Berlin]$ scp KM_9-23-04_17_The\
    > Closest\ Thing\ to\ Crazy.flac 192.168.1.8:/tmp
    > asuardi@192.168.1.8's password:
    > KM_9-23-04_17_The Closest Thing to Crazy.flac 100% 38MB 971.3KB/s 00:40
    > [asuardi@donkey melua_2004-09-23_Berlin]$ scp KM_9-23-04_17_The\
    > Closest\ Thing\ to\ Crazy.flac 192.168.1.8:/tmp
    > asuardi@192.168.1.8's password:
    > KM_9-23-04_17_The Closest Thing to Crazy.flac 100% 38MB 1.3MB/s 00:29
    > [asuardi@donkey melua_2004-09-23_Berlin]$ scp KM_9-23-04_17_The\
    > Closest\ Thing\ to\ Crazy.flac 192.168.1.8:/tmp
    > asuardi@192.168.1.8's password:
    > KM_9-23-04_17_The Closest Thing to Crazy.flac 100% 38MB 626.7KB/s 01:02
    >
    >
    > FC4 - 2.6.16:
    >
    > [asuardi@donkey melua_2004-09-23_Berlin]$ scp KM_9-23-04_17_The\
    > Closest\ Thing\ to\ Crazy.flac 192.168.1.8:/tmp
    > asuardi@192.168.1.8's password:
    > KM_9-23-04_17_The Closest Thing to Crazy.flac 100% 38MB 1.5MB/s 00:25
    > [asuardi@donkey melua_2004-09-23_Berlin]$ scp KM_9-23-04_17_The\
    > Closest\ Thing\ to\ Crazy.flac 192.168.1.8:/tmp
    > asuardi@192.168.1.8's password:
    > KM_9-23-04_17_The Closest Thing to Crazy.flac 100% 38MB 1.7MB/s 00:23
    > [asuardi@donkey melua_2004-09-23_Berlin]$ scp KM_9-23-04_17_The\
    > Closest\ Thing\ to\ Crazy.flac 192.168.1.8:/tmp
    > asuardi@192.168.1.8's password:
    > KM_9-23-04_17_The Closest Thing to Crazy.flac 100% 38MB 1.7MB/s 00:22
    >
    > Bottom line - old driver has better performance than the new one,
    > but most noticeably delivers consistent performance.
    >
    > I will be available for testing starting Thursday 30th as I'll be on
    > the road since then. Of course if the problem is identified and
    > fixed earlier, I won't cry ;)

    Well. It's not a huge regression. It's a 50%ish regression. We've done
    worse ;)

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