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Re: [PATCH]sched: Isochronous class v2 for unprivileged soft rt scheduling
Jack O'Quin wrote:
Con Kolivas <kernel@xxxxxxxxxxx> writes:
Does it degrade significantly with a compile running in the background?
Check results below.
Full results and pretty pictures available here:
http://ck.kolivas.org/patches/SCHED_ISO/iso2-benchmarks/
More pretty pictures with compile load on SCHED_ISO put up there now.
Outstanding.
How do you get rid of that checkerboard grey background in the graphs?
Funny; that's the script you sent me so... beats me?
Looking at the graphs, your system has a substantial 4 to 6 msec delay
on approximately 40 second intervals, regardless of which scheduling
class or how many clients you run. I'm guessing this is a recurring
long code path in the kernel and not a scheduling artifact at all.
Probably. No matter what I do the hard drive seems to keep trying to
spin down. Might be related.
in the background:
while true ; do make clean && make ; done
SCHED_ISO with 40 clients:
*********************************************
Timeout Count . . . . . . . . :( 0)
XRUN Count . . . . . . . . . : 3
Delay Count (>spare time) . . : 20
Delay Count (>1000 usecs) . . : 0
Delay Maximum . . . . . . . . : 5841 usecs
Cycle Maximum . . . . . . . . : 891 usecs
Average DSP Load. . . . . . . : 34.1 %
Average CPU System Load . . . : 10.7 %
Average CPU User Load . . . . : 87.8 %
Average CPU Nice Load . . . . : 0.0 %
Average CPU I/O Wait Load . . : 0.7 %
Average CPU IRQ Load . . . . : 0.8 %
Average CPU Soft-IRQ Load . . : 0.0 %
Average Interrupt Rate . . . : 1711.4 /sec
Average Context-Switch Rate . : 20751.6 /sec
*********************************************
Cheers,
Con
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