VMware Communities: >100% utilization for a VM ...

Up to Discussions in ESX Server VirtualCenter Private Beta Discussion (VI3 beta, LOCKED)

7 Replies Last post: Nov 21, 2005 10:32 AM by djacobs

>100% utilization for a VM

Nov 17, 2005 7:50 AM

DougBaer 491 posts since
Oct 20, 2004

I have a VM that I've had running for almost three days with the cpubusy.vbs script (the same one from the VMware class) running inside it -- I just wanted something that would cause a lot of processor utilization for a long period of time.

Currently, VC reports on the VM's Summary tab that this VM is using 112% CPU. The ESX host shows only 61% utilization.

I need to bounce the ESX host to disable HT for another test and steal some parts from the server, but figured I'd ask before I did that.

Re: >100% utilization for a VM Nov 17, 2005 7:58 AM

GeorgeS 683 posts since
Feb 19, 2004

Is this an SMP VM? 2-CPU physical server? If so, the ESX CPU utilization has always shown %utilization of total physical and granting for some stats measurement err (avg CPU utilization over different periods), the 61% of the total would be roughly equal to 112% of a single CPU.

Re: >100% utilization for a VM Nov 17, 2005 8:48 AM

in response to: GeorgeS

DougBaer 491 posts since
Oct 20, 2004

No, this is a single proc VM -- the physical server had HT enabled (this is also the one that was reporting 16 virtual procs on a dual-proc machine with HT).

I've disabled that and will see if this happens again.

Re: >100% utilization for a VM Nov 17, 2005 8:50 AM

in response to: DougBaer

GeorgeS 683 posts since
Feb 19, 2004

Sounds like their are a few calculations that have to be fixed for HT again.

VMware had this problem when they initially supported HT in 2.1 and I think it took a couple revisions before they got it right.

Re: >100% utilization for a VM Nov 18, 2005 9:16 AM

in response to: GeorgeS

djacobs 99 posts since
Oct 6, 2005

Hey Doug, Did you file an SR for this one? I was checking, but did not see anything. Also, if you could send screen shots as well?

Re: >100% utilization for a VM Nov 18, 2005 9:33 AM

in response to: djacobs

DougBaer 491 posts since
Oct 20, 2004

Not yet. Once I see it happen again, I'll grab some screen shots. If you'd like, I can open an SR, but I'd have to send in the data from the database at this point because the server is only sitting at 92% utilization at the moment.

Maybe because I turned HT off (?)

If I don't see it by next week, I'll turn HT back on and check again. Deal?

Re: >100% utilization for a VM Nov 21, 2005 8:58 AM

in response to: djacobs

DougBaer 491 posts since
Oct 20, 2004

I just suspended the machine to reboot the host and turn HT back on and the VM spiked to 101%.

I have opened an SR (223299) and uploaded a screenshot to the FTP site.

Doug

Re: >100% utilization for a VM Nov 21, 2005 10:32 AM

in response to: DougBaer

djacobs 99 posts since
Oct 6, 2005

Thanks

Actions

View as PDF

Up to Discussions in ESX Server VirtualCenter Private Beta Discussion (VI3 beta, LOCKED)