Limit CPU

Discussion in 'Windows Virtual Machine' started by JustinP1, Mar 21, 2015.

  1. JustinP1

    JustinP1 Bit poster

    Messages:
    2
    I have a question, after searching for forums and google I have not found a good answer my question: Can I limit the CPU (max % usage) to a VM, and prevent the VM from putting the CPU into turbo mode. In essence I want the OS to think its a 2ghz processor instead of the 2.8 + 3.2turbo?

    I have a macbook pro 2014, 2.8i5 16gb Ram
    I am running a win 8.1 pro for development (visual studio, mssql)

    I keep running into the issue where the Host CPU is constantly being hammered by the VM, I found that it is the win8.1 on idle maintenance tasks that are taxing the CPU, but I also found (by running the intel power gadget) that while the VM is running it keeps the cpu into the turbo range for long periods of time (3.2ghz) even when the VM is not using a lot of CPU (>20%). I found that limiting the maximum cpu in the power settings has no affect (its a vm...) my only true recourse was to limit it to one CPU but it still can and will kick it over into turbo mode if the cpu is even slightly taxed on the vm side. Is there a way to limit the maximum the VM can use on a CPU something similar to the Execution Cap on virtual box?
     
  2. PaulChristopher@Parallels

    PaulChristopher@Parallels Product Expert Staff Member

    Messages:
    3,112
    Hi JustinP1,
    If your Mac has 2 or more CPUs, consumption around 100% in Activity Monitor is acceptable and should not decrease your Mac performance. So no actions are need to be performed.
    If you feel the performance has been decreased and you have troubles operation in Mac or Virtual Machine, please check KB http://kb.parallels.com/116263
     

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