[LAU] LinuxSampler higher priority than the audio card or jack?!

Ken Restivo ken at restivo.org
Mon Aug 17 04:04:50 EDT 2009


Now, how did *that* happen?

 PID CLS RTPRIO  NI PRI %CPU STAT COMMAND
    3 FF      99   - 139  0.0 S<   migration/0
    4 FF      99   - 139  0.0 S<   posixcputmr/0
   14 FF      99   - 139  0.0 S<   watchdog/0
17559 FF      98   - 138  0.0 SLl  linuxsampler
 1585 FF      85   - 125  0.0 S<   IRQ-219
17562 FF      81   - 121  0.0 S    midisplit
17473 FF      80   - 120  0.0 SLsl jackd
17473 FF      70   - 110  3.1 SLsl jackd
17584 FF      66   - 106  0.0 SLl  jack-rack
17490 FF      65   - 105  0.9 SLl  lashd
17501 FF      65   - 105  2.5 SLl  fluidsynth
17502 FF      65   - 105  5.7 SLl  fluidsynth
17503 FF      65   - 105  2.4 SLl  fluidsynth
17559 FF      65   - 105  4.4 SLl  linuxsampler
17584 FF      65   - 105  7.7 SLl  jack-rack
    5 FF      50   -  90  0.0 S<   sirq-high/0
    6 FF      50   -  90  0.0 S<   sirq-timer/0
    7 FF      50   -  90  0.0 S<   sirq-net-tx/0
    8 FF      50   -  90  0.0 S<   sirq-net-rx/0
    9 FF      50   -  90  0.0 S<   sirq-block/0
   10 FF      50   -  90  0.0 S<   sirq-tasklet/0
   11 FF      50   -  90  0.0 S<   sirq-sched/0
   12 FF      50   -  90  0.0 S<   sirq-hrtimer/0
   13 FF      50   -  90  0.0 S<   sirq-rcu/0
   53 FF      50   -  90  0.0 S<   IRQ-9
  316 FF      50   -  90  0.0 S<   IRQ-12


 LinuxSampler grabs priority 98??!

 Most JACK apps start up at 65, as you can see, below the priority of jackd.

 IRQ-219 is my audio interface.

 How was LinuxSampler able to grab such a ridiculously high priority? Who told it to do that?

 -ken



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