Re: [PATCH]sched: Isochronous class v2 for unprivileged soft rt scheduling

From: Con Kolivas
Date: Sat Jan 22 2005 - 23:37:59 EST


Jack O'Quin wrote:
[snip lots of valid points]
suggest some things to try. First, make sure the JACK tmp directory
is mounted on a tmpfs[1]. Then, try the test with ext2, instead of

Looks like the tmpfs is probably the biggest problem. Here's SCHED_ISO with just the /tmp mounted on tmpfs change - running on a complete desktop environment with a 2nd exported X seession and my wife browsing the net and emailing at the same time.

************* SUMMARY RESULT ****************
Total seconds ran . . . . . . : 300
Number of clients . . . . . . : 14
Ports per client . . . . . . : 4
Frames per buffer . . . . . . : 64
Number of runs . . . . . . . :( 1)
*********************************************
Timeout Count . . . . . . . . :( 0)
XRUN Count . . . . . . . . . : 0
Delay Count (>spare time) . . : 0
Delay Count (>1000 usecs) . . : 0
Delay Maximum . . . . . . . . : 72 usecs
Cycle Maximum . . . . . . . . : 1108 usecs
Average DSP Load. . . . . . . : 50.1 %
Average CPU System Load . . . : 10.7 %
Average CPU User Load . . . . : 18.3 %
Average CPU Nice Load . . . . : 0.0 %
Average CPU I/O Wait Load . . : 0.1 %
Average CPU IRQ Load . . . . : 0.0 %
Average CPU Soft-IRQ Load . . : 0.0 %
Average Interrupt Rate . . . : 1693.1 /sec
Average Context-Switch Rate . : 18852.7 /sec
*********************************************
Delta Maximum . . . . . . . . : 0.00000
*********************************************
Warning: empty y2 range [0:0], adjusting to [0:1]

All invalid runs removed and just this one posted here:
http://ck.kolivas.org/patches/SCHED_ISO/iso2-benchmarks/

How's that look?

Cheers,
Con

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