[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] atropos again
> > Stephan, > > Thanks a lot for sharing the SEDF patch. BTW, where can I find the > > reference to use it? > > SEDF patch now in the public unstable tree, too! Check it out! > There should be a mini-HOWTO, with some examples. Thanks. I will check the unstable tree out! > > > Is the usage similar to Atropos (for example, "xm > > atropos DOM PERIOD SLICE LATENCY XTRATIME")? > > xm sedf DOM PERIOD SLICE LATENCY XTRATIME WEIGHT > > Where: > PERIOD, SLICE: times for guarantees (NANOseconds) > LATENCY: currently ignored, recompile with other #define's in > sched_sedf.c (ns) > XTRATIME: flag, set to 1 and domain gets idle cpu time additional to > it's share > WEIGHT: use, if you don't want to specify periods/slices, simply > distributes the cpu according to these weights > > Example: > > xm sedf 1 20000000 5000000 0 0 0 > xm sedf 2 25000000 12500000 0 0 0 > > -dom 1 gets 25% cpu share (5 ms every 20 ms) > -dom 2 gets 50% cpu share (12,5 ms every 25 ms) > > xm sedf 1 0 0 0 0 0 1 > xm sedf 2 0 0 0 0 0 5 > > -dom 2 gets 5-times more cpu than dom 1 > -in total they get 95% - utilisation of fully specified domains I can understand dom2 get 5 times more cpu than dom1, but why in total they get 95%, not 94% or 96%? Thanks. Xuehai _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel
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