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This thread has a great write up relevant for hyper-V. But it is very hyper-V specific. It does not address how to measure cpu steal on Win servers in EC2 and RS Cloud environments (I have tried the steps there, and they do not apply -- the counters are not available,and I have not spotted similar counters with diff names)

Question is: How do I measure it on win2008 and win2012 servers hosted on EC2 and Rackspace clouds?

I understand there may be no explicit answer to this question (e.g. a performance counter or such may not be available on Xen). So then interpret the question in a more meta manner: "How do I measure CPU Steal?" As there appears to be no explicit way to measure it, what is an effective implicit way?

Additional: Like on other cloud platforms, you can spin up 5 instances on rackspace cloud, and see wildly different performance on each. Because.... noisy neighbors.... so how to directly measure this, from a CPU and networking perspective?

  • Your question was answered there. – Michael Hampton Jan 9 '14 at 3:48
  • @MichaelHampton No, I am afraid it is not answered there. I already read that whole article, but it does not apply to Win servers on EC2 and RS cloud (if it did, would not have posted here!) – samsmith Jan 9 '14 at 3:50
  • @samsmith Sure it does. "But you can only see that data on a Windows Hyper-V hypervisor." Rackspace and EC2 aren't running on the Hyper-V hypervisors (or ESXi), therefore it's not possible. – ceejayoz Jan 24 '14 at 17:18
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Per that thread, it's only available to Windows on ESXi 5+ or Hyper-V. It's not available to Windows on the Xen hypervisor, which powers both EC2 and Rackspace.

  • The question is a meta question: "How do I measure CPU Steal?" There appears to be no explicit way. So what is an effective implicit way? -- revving OP – samsmith Jan 24 '14 at 20:55
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    That's funny, I can clearly see the CPU steal time on my EC2 instances...in Linux. – Michael Hampton Jan 24 '14 at 21:31
  • This answer is incorrect. Rackspace cloud servers most definitely do provide CPU steal counters. I'm looking at my server right now and vmstat -s shows 430184 stolen cpu ticks. – Mxx Jan 25 '14 at 4:26
  • @Mxx You're running vmstat -s on a Windows machine, per the question title? – ceejayoz Jan 25 '14 at 8:00
  • @ceejayoz no, i'm running it on linux. But Guest OS is irrelevant to the hypervisor. Your answer claims that Xen/Rackspace does not provide "cpu stolen" counters, which is wrong because I shown you proof that it does! As for how to see it in Windows, your answer also does not address that. – Mxx Jan 25 '14 at 19:25

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