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    Subject[ANNOUNCE][RFC] PlugSched-6.1.3 for 2.6.13 and 2.6.14-rc4
    This version contains a new scheduler, spa_svr, which is a minor 
    extension of spa_no_frills intended for use on servers. It makes no
    attempt to improve interactive responsiveness but includes a simplified
    version of the throughput bonus mechanism found in Zaphod. This
    mechanism attempts to minimize the time tasks spend on run queues
    waiting for CPU access when the system is moderately loaded by giving
    tasks temporary priority bonuses based on the relationship between the
    recent average time spent on run queues and on a cpu per cycle.
    (Although it's effectiveness tends to disappear when the system is fully
    loaded, it is still useful as considerable delay can be seen on systems
    with quite low average loads due to lack of serendipity.)

    A patch for 2.6.14-rc4 is available at:


    and a patch to upgrade the 6.1.2 version for 2.6.13 to 6.1.3 is
    available at:


    Very Brief Documentation:

    You can select a default scheduler at kernel build time. If you wish to
    boot with a scheduler other than the default it can be selected at boot
    time by adding:


    to the boot command line where <scheduler> is one of: ingosched,
    nicksched, staircase, spa_no_frills, spa_ws, spa_svr or zaphod. If you
    don't change the default when you build the kernel the default scheduler
    will be ingosched (which is the normal scheduler).

    The scheduler in force on a running system can be determined by the
    contents of:


    Control parameters for the scheduler can be read/set via files in:


    Peter Williams

    "Learning, n. The kind of ignorance distinguishing the studious."
    -- Ambrose Bierce
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