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    SubjectRe: [patch] latest 'guaranteed low latency' patch against 2.2.14

    I installed the patch yesterday and tested overnight, the timings I
    am seeing are only slightly different from the 2.2.13 latencies.
    For SCHED_FIFO tasks synchronized by signals from setitimer at
    50Hz, I measure max scheduling jitter of +/- 640usec. I have stress
    tested with heavy disk activity, network traffic, proc accesses, and
    kernel rebuilds.

    I have not tested SMP latencies. My system specs are:

    Linux version 2.2.14 (root@vmebox) (gcc version egcs-2.91.66
    19990314/Linux (egcs-1.1.2 release)) #1 Mon Feb 7 17:39:24 EST 2000

    processor : 0
    vendor_id : GenuineIntel
    cpu family : 6
    model : 7
    model name : Pentium III (Katmai)
    stepping : 3
    cpu MHz : 498.675139
    cache size : 512 KB
    fdiv_bug : no
    hlt_bug : no
    sep_bug : no
    f00f_bug : no
    coma_bug : no
    fpu : yes
    fpu_exception : yes
    cpuid level : 3
    wp : yes
    flags : fpu vme de pse tsc msr pae mce cx8 sep mtrr pge mca cmov
    pat pse36 pn mmx fxsr xmm
    bogomips : 498.07

    Many thanks for this very nice patch.


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