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    SubjectRe: [patch] Real-Time Preemption, -RT-2.6.10-rc2-mm2-V0.7.30-2

    * Rui Nuno Capela <rncbc@rncbc.org> wrote:

    > OK. I tried 14 instances of jack_test. I even modded Florian's
    > original source code, to let each client instance have 4 ins and 4
    > outs, and to make things a litle bit heavier, all 4 inputs are mixed
    > into each of the 4 outputs.
    >
    > Saw at least a couple of XRUNs in a 20 (4*5) minute test-run. CPU load
    > doesn't get above 30% on my laptop (P4/UP 2.533Ghz).

    the max CPU load i get here is 46% (your laptop is faster), but no
    xruns. The result of a 5-minute run is:

    ************* SUMMARY RESULT ****************
    Timeout Count . . . . . . . . :( 0)
    XRUN Count . . . . . . . . . : 0
    Delay Count (>spare time) . . : 0
    Delay Count (>1000 usecs) . . : 0
    Delay Maximum . . . . . . . . : 0 usecs
    Cycle Maximum . . . . . . . . : 1016 usecs
    Average DSP Load. . . . . . . : 46.4 %
    Average CPU System Load . . . : 40.5 %
    Average CPU User Load . . . . : 2.3 %
    Average CPU Nice Load . . . . : 0.0 %
    Average CPU I/O Wait Load . . : 0.0 %
    Average CPU IRQ Load . . . . : 0.0 %
    Average CPU Soft-IRQ Load . . : 0.0 %
    Average Interrupt Rate . . . : 2374.1 /sec
    Average Context-Switch Rate . : 19172.8 /sec

    i suspect i need to activate some option/define in jackd to get some of
    the more advanced stats such as delay-maximum?

    the kernel i used was -30-6 and i used the snd-via82xx driver. (I had to
    do -n3 instead of -n2 when starting up jackd - otherwise i'd get an
    endless stream of very small xruns, apparently a via82xx driver bug?)

    Ingo
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