alex wrote: > On Fri, Apr 24, 2009 at 3:49 PM, alex <tomorrowanewday@xxxxxxxxx> > wrote: >> I tested the CFS in detail, according to >> Documentation/sched-design-CFS.txt >> >> I found it does not work. Is this a bug to CFS? >> > > I reviewed my experiment, and found a mistake there. > The CFS is OK. > > But the information shown from 'top' reveals that the jitter is > somewhat great. > >> And I found CFS does not reserve cpu usage. That is to say, when >> none else is active, the active one can take all the cpu time. this >> statement holds. >From this threads: http://markmail.org/message/rmww5bbxkdcpoqjm https://lists.linux-foundation.org/pipermail/containers/2008-August/012128.html http://lkml.indiana.edu/hypermail/linux/kernel/0606.1/2270.html CFS doesn't support hard-cpu-limit, like "cap" in credit scheduler. There are some patches posted in LKML http://markmail.org/message/fuiq2dn3h74yj4zg, but applied on ooold scheduler. Will you add hard-cpu-limit feature into CFS?:) I think it's usefull. Best Regards, Disheng, Su-- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
