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Thread: Virtualization cpu usage

  1. #1
    Join Date
    Apr 2007
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    Ubuntu 8.04 Hardy Heron

    Question Virtualization cpu usage

    I dipped my toes in Ubuntu for a month last spring, and went back to XP when I was in dire need of some hard drive space, and after another annual XP reinstall, I'm sick of it.

    There are some non-gaming Windows apps that I need to use - some seem to work with WINE (Photoshop CS 2) and others (Flash) will probably need to be used in a virtualized OS. I'd originally considered waiting til I got a new laptop in summer to make the move (setup the new one while the old one was available for working, etc), but as XP's performance is decaying faster than usual, I'm itching to make a switch.

    My main Q is what kind of a cpu hit does virtualization involve? I know that RAM can be allocated (I've got 2gb now vs 1gb last spring), but I wonder if my 2ghz Centrino can handle a guest OS to run Flash or something else periodically.

    Right now, it seems I use RAM more than the CPU, so perhaps making a switch wouldn't be that big a deal.


    thanks,

    Arp
    Dell 6000d / 2Ghz Pentium M / 2GB ram / ATI something or the other

  2. #2
    Join Date
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    Ubuntu 12.10 Quantal Quetzal

    Re: Virtualization cpu usage

    I run Windows XP, happily photoshopping on my Virtualbox. It runs on a P4 2.66GHz without HT, and no VT-extensions and whatnot. The CPU usage for the whole computer put together is approx 25%

  3. #3
    Join Date
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    Ubuntu 8.04 Hardy Heron

    Re: Virtualization cpu usage

    That sounds perfect! I don't play games (and I think I'll keep a dual-boot for that), and my CPU hit is rarely above 30%. RAM usage otoh is variable, though affected way too much by Firefox and Photoshop memory leaks.

    Now to find some free time to reformat, reinstall and keep my wife from getting to irritated by the whole process
    Dell 6000d / 2Ghz Pentium M / 2GB ram / ATI something or the other

  4. #4
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    Re: Virtualization cpu usage

    Doh - I realized that I can get an idea of cpu usage by virtualizing Ubuntu inside my current XP install. I feel like I just bumped my head and saw the word 'eureka' by chance...
    Dell 6000d / 2Ghz Pentium M / 2GB ram / ATI something or the other

  5. #5
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    Re: Virtualization cpu usage

    I'm not sure, but I reckon virtualizing Ubuntu in Windows is quite different from virtualizing Windows in Ubuntu.

  6. #6
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    Re: Virtualization cpu usage

    I'm sure it's not exact, but I should get an idea of what my cpu hit will be. The main thing I'm curious about is what the cpu hit for VirtualBox itself will be.
    Dell 6000d / 2Ghz Pentium M / 2GB ram / ATI something or the other

  7. #7
    Join Date
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    Re: Virtualization cpu usage

    From my experience with both VBox and VMware server there is no "CPU hit", unless you are using the virtual for something. When in Ubuntu you can't tell that vmware is loaded and working, of course nothing is running in the background.

    You can change the NICE for the virtual if you find that necessary.
    Regards, frank, at http://yantrayoga.typepad.com/noname/
    Homebuilt Lian-Li PC-Q33WB, Intel i7-4790K 4.6GHz, SSDs,16G RAM | Dell Laptop 11.6" N3050.
    Oracle VBox w/ WinXP/Win8 running Xara Designer, PaintShopPro, and InDesign CS.

  8. #8
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    Ubuntu 8.04 Hardy Heron

    Re: Virtualization cpu usage

    NICE? I'll give VirtualBox a go next week. After that, I'll try to revive an old Thinkpad P166 that's been closeted for a few years
    Dell 6000d / 2Ghz Pentium M / 2GB ram / ATI something or the other

  9. #9
    Join Date
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    Ubuntu Development Release

    Re: Virtualization cpu usage

    NICE is a priority setting for CPU and memory. Use the man pages to understand the command usage.
    Regards, frank, at http://yantrayoga.typepad.com/noname/
    Homebuilt Lian-Li PC-Q33WB, Intel i7-4790K 4.6GHz, SSDs,16G RAM | Dell Laptop 11.6" N3050.
    Oracle VBox w/ WinXP/Win8 running Xara Designer, PaintShopPro, and InDesign CS.

  10. #10
    Join Date
    Apr 2007
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    Ubuntu 8.04 Hardy Heron

    Re: Virtualization cpu usage

    Thanks for explaining.
    Dell 6000d / 2Ghz Pentium M / 2GB ram / ATI something or the other

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