This is version 2 of the SCHED_ISO patch with the yield bug fixed and code cleanups.
...answering on this thread to consolidate the two branches of the email thread.
Here are my results with SCHED_ISO v2 on a pentium-M 1.7Ghz (all powersaving features off):
SCHED_NORMAL:
awk: ./jack_test3_summary.awk:67: (FILENAME=- FNR=862) fatal: division by zero attempted
Well we wont bother looking at those results then. there were 38 XRUNS that did make it on the parsed output.
SCHED_FIFO: ********************************************* Timeout Count . . . . . . . . :( 0) XRUN Count . . . . . . . . . : 4 Delay Count (>spare time) . . : 18 Delay Count (>1000 usecs) . . : 0 Delay Maximum . . . . . . . . : 6595 usecs Cycle Maximum . . . . . . . . : 368 usecs Average DSP Load. . . . . . . : 17.9 % Average CPU System Load . . . : 3.4 % Average CPU User Load . . . . : 13.7 % Average CPU Nice Load . . . . : 0.0 % Average CPU I/O Wait Load . . : 1.4 % Average CPU IRQ Load . . . . : 0.6 % Average CPU Soft-IRQ Load . . : 0.0 % Average Interrupt Rate . . . : 1697.0 /sec Average Context-Switch Rate . : 13334.1 /sec *********************************************
SCHED_ISO (iso_cpu 70): ********************************************* Timeout Count . . . . . . . . :( 0) XRUN Count . . . . . . . . . : 5 Delay Count (>spare time) . . : 18 Delay Count (>1000 usecs) . . : 0 Delay Maximum . . . . . . . . : 6489 usecs Cycle Maximum . . . . . . . . : 405 usecs Average DSP Load. . . . . . . : 18.0 % Average CPU System Load . . . : 3.3 % Average CPU User Load . . . . : 13.7 % Average CPU Nice Load . . . . : 0.0 % Average CPU I/O Wait Load . . : 0.0 % Average CPU IRQ Load . . . . : 0.6 % Average CPU Soft-IRQ Load . . : 0.0 % Average Interrupt Rate . . . : 1700.2 /sec Average Context-Switch Rate . : 12457.2 /sec *********************************************
Increasing iso_cpu did not change the results.
At least in my testing on my hardware, v2 is working as advertised. I need results from more hardware configurations to know if priority support is worth adding or not.
Cheers, Con - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
