Con Kolivas <[EMAIL PROTECTED]> writes:
This patch for 2.6.11-rc1 provides a method of providing real time scheduling to unprivileged users which increasingly is desired for multimedia workloads.
I ran some jack_test3.2 runs with this, using all the default
settings. The results of three runs differ quite significantly for no
obvious reason. I can't figure out why the DSP load should vary so
much.
I installed a fresh jack installation and got the test suite. I tried running the test suite and found it only ran to completion if I changed the run time right down to 30 seconds from 300. Otherwise it bombed out almost instantly at the default of 300. I don't know if that helps you debug the problem or not but it might be worth mentioning.
As for my own results I gave it a run on the weak SCHED_ISO implementation in 2.6.10-ck5 (P4HT 3.06):
SCHED_NORMAL: ********************************************* Timeout Count . . . . . . . . :( 0) XRUN Count . . . . . . . . . : 74 Delay Count (>spare time) . . : 0 Delay Count (>1000 usecs) . . : 0 Delay Maximum . . . . . . . . : 0 usecs Cycle Maximum . . . . . . . . : 1046 usecs Average DSP Load. . . . . . . : 18.0 % Average CPU System Load . . . : 2.5 % Average CPU User Load . . . . : 7.8 % Average CPU Nice Load . . . . : 0.1 % Average CPU I/O Wait Load . . : 0.1 % Average CPU IRQ Load . . . . : 0.1 % Average CPU Soft-IRQ Load . . : 0.0 % Average Interrupt Rate . . . : 1776.0 /sec Average Context-Switch Rate . : 10290.4 /sec *********************************************
SCHED_NORMAL nice -n -20: ********************************************* Timeout Count . . . . . . . . :( 0) XRUN Count . . . . . . . . . : 266 Delay Count (>spare time) . . : 0 Delay Count (>1000 usecs) . . : 0 Delay Maximum . . . . . . . . : 0 usecs Cycle Maximum . . . . . . . . : 2239 usecs Average DSP Load. . . . . . . : 28.6 % Average CPU System Load . . . : 2.9 % Average CPU User Load . . . . : 10.2 % Average CPU Nice Load . . . . : 0.0 % Average CPU I/O Wait Load . . : 1.0 % Average CPU IRQ Load . . . . : 0.2 % Average CPU Soft-IRQ Load . . : 0.1 % Average Interrupt Rate . . . : 2049.7 /sec Average Context-Switch Rate . : 10145.1 /sec *********************************************
SCHED_ISO: ********************************************* Timeout Count . . . . . . . . :( 0) XRUN Count . . . . . . . . . : 1 Delay Count (>spare time) . . : 0 Delay Count (>1000 usecs) . . : 0 Delay Maximum . . . . . . . . : 0 usecs Cycle Maximum . . . . . . . . : 687 usecs Average DSP Load. . . . . . . : 19.9 % Average CPU System Load . . . : 2.6 % Average CPU User Load . . . . : 10.3 % Average CPU Nice Load . . . . : 0.0 % Average CPU I/O Wait Load . . : 0.0 % Average CPU IRQ Load . . . . : 0.2 % Average CPU Soft-IRQ Load . . : 0.3 % Average Interrupt Rate . . . : 2166.2 /sec Average Context-Switch Rate . : 10117.3 /sec *********************************************
SCHED_FIFO: ********************************************* Timeout Count . . . . . . . . :( 0) XRUN Count . . . . . . . . . : 2 Delay Count (>spare time) . . : 0 Delay Count (>1000 usecs) . . : 0 Delay Maximum . . . . . . . . : 0 usecs Cycle Maximum . . . . . . . . : 544 usecs Average DSP Load. . . . . . . : 19.5 % Average CPU System Load . . . : 3.1 % Average CPU User Load . . . . : 12.6 % Average CPU Nice Load . . . . : 0.0 % Average CPU I/O Wait Load . . : 0.0 % Average CPU IRQ Load . . . . : 1.0 % Average CPU Soft-IRQ Load . . : 1.1 % Average Interrupt Rate . . . : 5018.4 /sec Average Context-Switch Rate . : 10902.5 /sec *********************************************
It occasionally would segfault on client exit as well (as you've already mentioned). I think we're still in the dark here to be honest.
Con
signature.asc
Description: OpenPGP digital signature
