Hi, I have VBox 1.5.0 on XP host.
2 guests, XP and Linux, both idling at 0%. Additions installed.
When I stress Linux guest with compiling etc, hosts task manager says CPU usage is:
VirtualBox.exe 50-80% (Linux guest)
VirtualBox.exe 20-50% (XP guest)
When I stress XP guest, the usage looks normal:
VirtualBox.exe 0% (Linux guest)
VirtualBox.exe 99% (XP guest)
Why does the usage of Linux guest affect the XP process? Is this a bug or some architecture stuff I missed? The Linux guest does seem sluggish when compiling stuff etc compared to VMware.
Strange CPU usage between guests
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- Posts: 27
- Joined: 10. Sep 2007, 05:30
- Primary OS: MS Windows 7
- VBox Version: PUEL
- Guest OSses: MS Windows Vista, MacOS Snow Leopard, Ubuntu 9.10
- Location: San Francisco, CA
- Contact:
I think that others are seeing this issue as well, on Linux hosts as well (eg http://forums.virtualbox.org/viewtopic.php?t=2756). I attempted to collect links to some of the relevant discussions here:
http://www.virtualbox.org/ticket/894
http://www.virtualbox.org/ticket/894
One way to replicate this with one guest running is to play some video (on the host). When the video player is at same or higher priority than guest, then the guest process uses CPU for no apparent reason. When I lower player priority below guest, everything returns to normal.
Maybe it has something to do with graphics, since running high CPU applications like prime95 doesn't get this effect.
Maybe it has something to do with graphics, since running high CPU applications like prime95 doesn't get this effect.