Messages in this thread | | | Date | Wed, 15 Feb 2012 23:08:17 +0530 | From | Srivatsa Vaddagiri <> | Subject | Re: sched: Performance of Trade workload running inside VM |
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* 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?
- vatsa
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