Description of problem: Very high to 100% CPU usage with XP VM. (Despite CPU usage inside VM at < 10%. Version-Release number of selected component (if applicable): $ qemu QEMU PC emulator version 0.8.2, Copyright (c) 2003-2005 Fabrice Bellard How reproducible: Reasonably constant, but occasionally spikes ~50% of the time. Steps to Reproduce: 1. Run Qemu with XP Pro VM. 2. Log in to XP VM 3. Turn off all eye-candy in XP, and leave it sit at desktop. 4. Have TaskManager minimised in system-tray. 5. Observe host CPU with top / gkrellm. Actual results: AthlonX2 5000+ CPU is constantly at 2600 MHz, despite Cool-n-Quiet enabled. Without Qemu running, the cpu usage will drop to 1000 MHz Expected results: Host CPU to mimick guest + margin (overhead). Additional info: Command line used to run qemu: qemu -m 256 -usb -kernel-kqemu -localtime -usbdevice tablet /usr/local/Data/xpvm.dat Running the 2.6.18-1.2849.fc6 kernel. Whether or not kqemu is loaded doesn't appear to make a difference. Any other details available upon request.
Please report this upstream, I'm afraid there isn't much we can do with our limited knowledge of qemu. David, if you agree please close this as upstream.
Where is "upstream", for this to be reported? This problem has been constant between the 2.6.18 kernel, and the now 2.6.20-1.2933.fc6 kernel.
You mean that if you downgrade to a 2.6.17 kernel this goes away?? Ifso, then please change the component to kernel, if not then upstream is: http://fabrice.bellard.free.fr/qemu/ and the place to report bugs upstream is: http://qemu-forum.ipi.fi/
Not quite - I tried Qemu out initially on the system with a kernel of 2.6.18-1.2849.fc6, and with the yum updates fo kernels to the most recent 2.6.20-1.2933.fc6 kernel, the problem has still been there. I wasn't sure if the kernel revision was important, but I included this information regardless.
(In reply to comment #4) > Not quite - I tried Qemu out initially on the system with a kernel of > 2.6.18-1.2849.fc6, and with the yum updates fo kernels to the most recent > 2.6.20-1.2933.fc6 kernel, the problem has still been there. I wasn't sure if the > kernel revision was important, but I included this information regardless. Okay, in that case as already said please report this upstream, there isn't much we can do: http://fabrice.bellard.free.fr/qemu/ and the place to report bugs upstream is: http://qemu-forum.ipi.fi/
A similar problem has been reported here (http://qemu-forum.ipi.fi/viewtopic.php?t=3175), but suggests disabling the tablet mouse functionality. I tried this without success. Still high CPU usage. Will move further queries to the forum and see what transpires.
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