Messages in this thread | | | Date | Tue, 13 May 2014 11:47:37 +0200 | From | Peter Zijlstra <> | Subject | Re: [ISSUE] sched/cgroup: Does cpu-cgroup still works fine nowadays? |
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On Tue, May 13, 2014 at 11:34:43AM +0800, Michael wang wrote: > During our testing, we found that the cpu.shares doesn't work as > expected, the testing is: >
/me zaps all the kvm nonsense as that's non reproducable and only serves to annoy.
Pro-tip: never use kvm to report cpu-cgroup issues.
> So is this results expected (I really do not think so...)? > > Or that imply the cpu-cgroup got some issue to be fixed?
So what I did (WSM-EP 2x6x2):
mount none /cgroup -t cgroup -o cpu mkdir -p /cgroup/a mkdir -p /cgroup/b mkdir -p /cgroup/c
echo $$ > /cgroup/a/tasks ; for ((i=0; i<12; i++)) ; do A.sh & done echo $$ > /cgroup/b/tasks ; for ((i=0; i<12; i++)) ; do B.sh & done echo $$ > /cgroup/c/tasks ; for ((i=0; i<12; i++)) ; do C.sh & done
echo 2048 > /cgroup/c/cpu.shares
Where [ABC].sh are spinners:
--- #!/bin/bash
while :; do :; done ---
for i in A B C ; do ps -deo pcpu,cmd | grep "${i}\.sh" | awk '{t += $1} END {print t}' ; done 639.7 629.8 1127.4
That is of course not perfect, but it's close enough.
Now you again.. :-) [unhandled content-type:application/pgp-signature] | |