Pool CPU usage is impossible
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Hi!
So I just installed Xen Orchestra to take a peek. Added my XenServer pool to it and clicked Stats.
I see this:
That seems impossible. CPU usage at around 100% in general but sometimes up to 200 and 300%? How??
The "Stacked" switch only makes the green slightly darker.Meanwhile, in XenCenter it looks like this:
... which makes more sense. I just wish I could stack the CPU:s.The XenServer machine is a Dell r710. It has two CPU's with 12 cores each.
What's going on here? Is it a bug or is there an explanation for this weird chart?
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It appears that you are looking at the pool stats. Try looking at host stats and I think it will be more to your liking.
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@gigante said in Pool CPU usage is impossible:
% in general but sometimes up to 200 and 300%? How??
Each CPU thread count 100%. So, for example on an 8 core, 16 thread CPU, the maximum CPU usage can be 1600%.
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@s-pam Yeah I assume it works just like linux
topwith IRIX mode on (Shift + I). -
@danp I did, and it is! Thank you!
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@s-pam I am unsure of the purpose of that, but at least now I know! Thanks!
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@gigante said in Pool CPU usage is impossible:
@s-pam I am unsure of the purpose of that, but at least now I know! Thanks!
Just guessing here, but one reason is probably that single-threaded applications can only utilise one CPU thread, so they cannot go faster than 100%.
