Re: [PARPORT] Parallel ZIP-drive is little buggy with kernel 2.4.0-test1

From: The Contact (TheContact@MailAndNews.com)
Date: Tue Jun 06 2000 - 10:40:39 EDT

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    Tim Waugh wrote:
    [about reproducing the error]
    > Sorry, no. EPP mode in the BIOS. 2.4.0-test1 sources. VFAT
    > filesystem.
    >
    > # rm -f /mnt/zip/x; time cp linux-2.4.0-test1.tar.gz /mnt/zip/x
    >
    > under 2.2 took 48 seconds of real time. Under 2.4 it took 18. :-)
    >
    > What setting is your BIOS using for your parallel port?
    My settings were ECP+EPP:

    ..]$ time cp ~/Downloads/Tarballs/linux-2.4.0-test1.tar.gz /mnt/zip
    0.00user 3.88system 2:08.55elapsed 3%CPU (0avgtext+0avgdata
    0maxresident)k
    0inputs+0outputs (111major+18minor)pagefaults 0swaps

    Then I placed replaced ECP+EPP by EPP:

    ..]$ time cp linux-2.4.0-test1.tar.gz /mnt/zip
    0.00user 3.55system 0:41.35elapsed 8%CPU (0avgtext+0avgdata
    0maxresident)k
    0inputs+0outputs (141major+18minor)pagefaults 0swaps

    Thx, it's a big improvement (system still a little slow, but in
    comparison with ECP+EPP it's heaven!).
    But still, if you're copying the file to your ZIP-drive, and you move
    your mouse, is it slower/shockier than during normal operation (without
    copying to ZIP)?
    And why didn't this occured with 2.2.15 (ECP+EPP)? IIRC my mouse didn't
    shock either with 2.2.15 (I repeat, IIRC ;-)
    Maybe patching 2.4.0test1 could improve (this isn't a parport-problem,
    but system resource allocation, I think) - IF patching the kernel worked
    (I'm a really bad patcher :-(
    But that's a subject for a linux-ng...

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