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    SubjectRe: [ANNOUNCE][RFC] PlugSched-6.1.6 for 2.6.15-rc5 and 2.6.15-rc5-mm2
    Peter Williams wrote:
    > This version features a major gutting of the SPA based schedulers to
    > reduce overhead. The inclusion of the mechanisms for gathering and
    > displaying accrued scheduling statistics have been made a compile time
    > configurable option (default is exclusion) as they are not an integral
    > part of the scheduler and were mainly there to help with tuning. In a
    > future version they will be removed completely.
    > Additionally, the mechanism for auto detection and preferential
    > treatment of media streamers in the spa_ws scheduler has been made a
    > compile time option (default is exclusion). The reason for this is that
    > my testing shows that the performance of media streamers on spa_ws is
    > adequate without it. This will also be removed in a future version
    > unless requested otherwise.
    > A patch for 2.6.15-rc5 is available at:
    > <>
    > and a patch for 2.6.15-rc5-mm2 is available at:
    > <>

    This applies cleanly to 2.6.15-rc5-mm3 so no new patch for that kernel
    will be posted.

    > 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:
    > cpusched=<scheduler>
    > 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:
    > /proc/scheduler
    > Control parameters for the scheduler can be read/set via files in:
    > /sys/cpusched/<scheduler>/
    > Peter

    Peter Williams

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