Messages in this thread | | | Subject | Re: sched: Performance of Trade workload running inside VM | From | Peter Zijlstra <> | Date | Wed, 15 Feb 2012 18:45:02 +0100 |
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On Wed, 2012-02-15 at 23:08 +0530, Srivatsa Vaddagiri wrote: > * Peter Zijlstra <a.p.zijlstra@chello.nl> [2012-02-15 18:24:11]: > > > On Wed, 2012-02-15 at 22:40 +0530, Srivatsa Vaddagiri wrote: > > > Ok ..let me see if these numbers highlight the problem better. > > > > does this translate like: I've no fscking clue, > > I'd mentioned a possible reason earlier which is limiting VM1 to reach higher > utilization (which is the time it waits for cpu after wakeup): > > >b. In the "all VMs active" case, VM1's vcpu tasks were found to incur > > "high" wait times when ttwo of VM1's tasks were scheduled on the same > > CPU (i.e a VCPU task had to wait behind a sibling VCPU task for > > obtaining CPU resource). > > Let me get cpu wait time data and post it by tomorrow. > > > but my tinker made it go away? > > Do you have any other suggestions for me to try?
I'm still waiting for a problem description that isn't a book.
What does the load-balancer do, why is it wrong, why does your patch sort it etc.
I've really no idea what you're trying to do, other than make your numbers improve (which while a noble goal, doesn't help in judging your patch or suggesting alternative means of getting there).
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