Windows – VMware guest eats 100% cpu

vmware-workstationwindows 7

I have a Windows 7 x64 guest that acts very strange – the VM is very slow and taskmgr will consume 50% (with 2 cores) or up to 99% (single) of the CPU when everything else is idle.

  • Host is Windows 7 x64 with VMware Workstation 7.0.1
  • VMware tools are installed
  • the same VM, when running on another PC with VMware Server 2.0 will work OK (CPU at ~0% when idle)

I've tried (with no effects)

  • enabled/disabled 3d
  • selected 1 or 2 cores
  • adjusted memory (1gb/500mb)
  • adjusted the bios
  • mem.hotadd = "FALSE"
  • disabled page trimming

Windows 7 x86 guests on the same machine do not have this problem.


Edit: I usually run multiple VMs on that system.

Now I noticed that

  • if I start the x64 VM first it will run OK.
  • but when I start another VM (x86) with multiple processors it will have CPU issues.
  • if I suspend the first VM the issues in the second VM will disappear.

Apparently I can only run one VM with multiple processors without issues.

Best Answer

Updating to Workstation 7.1 resolved the issue.

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