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    SubjectRe: [announce] [patch] ultra-scalable O(1) SMP and UP scheduler
    On Fri, 4 Jan 2002, Ingo Molnar wrote:

    > for 2.4.17:
    >
    > http://redhat.com/~mingo/O(1)-scheduler/sched-O1-2.4.17-A0.patch

    > i did a fair number of UP and 2.4.17 tests as well.

    > Comments, bug reports, suggestions are welcome,

    Well, tried it out here on 2.4.17 (w/ ide.2.4.16 & freeswan_1.91) (and after
    patching md.c and loop.c), and boy did it blow chunks! ;-)

    First, loading the software watchdog module caused the thing to lock up
    solid during boot. No SysRq response, and nmi_watchdog did nada too.

    Next, after disabling the s/w watchdog, I could boot up.. great, I though it
    was all happy. I tried starting up 1 instance of setiathome, and saw how
    nicely it (mostly) remained affine to 1 processor, occasionally switching to
    the 2nd, and back again, maybe every 5-10 seconds.

    Next, though, I couldn't figure out why Mozilla wouldn't load. Then I
    noticed I could not open any more xterms. When I went to one open xterm to
    do some digging, I noticed very long pauses, where no keyboard input would
    be accepted, yet the mouse and the window manager remained responsive. Other
    tasks, like my scrolling network usage graph applet would stall as well.
    Eventually (after another minute or so), the box locked up solid.

    Well, I really liked the sound of this patch. Seemed very well though out.
    Too bad it doesn't like me! :-(

    You seem to indicate you've done (some) testing on 2.4.17, so I'm somewhat
    surprised that it died on me so quickly here. What more info can I give you
    that might help track the problem?

    Box: 2x Celeron / ABIT BP6 / 384MB
    Gnu C 2.95.3
    Gnu make 3.78.1
    binutils 2.10.1.0.2
    util-linux 2.10s
    mount 2.10s
    modutils 2.4.0
    e2fsprogs 1.19
    reiserfsprogs 3.x.0j
    pcmcia-cs 3.1.31
    PPP 2.4.0
    Linux C Library 2.1.3
    Dynamic linker (ldd) 2.1.3
    Linux C++ Library 2.10.0
    Procps 2.0.6
    Net-tools 1.54
    Console-tools 0.3.3
    Sh-utils 2.0
    Modules Loaded sb sb_lib uart401 sound soundcore printer hid input
    usb-uhci usbcore tulip ipt_mac ipt_state iptable_mangle ipt_LOG ipt_REJECT
    ip_nat_ftp ip_conntrack_ftp iptable_nat ip_conntrack iptable_filter
    ip_tables



    Regards,
    Ian Morgan
    --
    -------------------------------------------------------------------
    Ian E. Morgan Vice President & C.O.O. Webcon, Inc.
    imorgan@webcon.net PGP: #2DA40D07 www.webcon.net
    -------------------------------------------------------------------

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