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[Bug 1914667] Re: High cpu usage when guest is idle on qemu-system-i386
From: |
John Arbuckle |
Subject: |
[Bug 1914667] Re: High cpu usage when guest is idle on qemu-system-i386 |
Date: |
Wed, 10 Feb 2021 18:50:03 -0000 |
After updating QEMU to 1214d55d1c41fbab3a9973a05085b8760647e411, I
reinstalled Windows XP and the host CPU usage at idle was normal. My
guess is that I picked a bad commit to reinstall Windows XP.
I tried using "-smp 4". Windows XP started up to a black screen. When I
restarted the problem with high CPU usage at idle was back. I did not
use the "-smp 4" option after restarting.
When I first specified the '-smp 4' option I saw Windows install
something then have the computer restarted.
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https://bugs.launchpad.net/bugs/1914667
Title:
High cpu usage when guest is idle on qemu-system-i386
Status in QEMU:
New
Bug description:
When running Windows XP in qemu-system-i386, the cpu usage of QEMU is
about 100% even when the guest CPU usage is close to 2%. The host cpu
usage should be low when the guest cpu usage is low.
Command: qemu-system-i386 -hda <Windows XP HD image>
Using this command also shows around 100% host CPU usage:
qemu-system-i386 -m 700 -hda <Windows XP HD image> -usb -device usb-audio
-net nic,model=rtl8139 -net user -hdb mountable.img -soundhw pcspk
Using the Penryn CPU option also saw this problem:
qemu-system-i386 -hda <Windows XP HD image> -m 700 -cpu Penryn-v1
Using "-cpu pentium2" saw the same high host cpu usage.
My Info:
M1 MacBook Air
Mac OS 11.1
qemu-system-i386 version 5.2 (1ba089f2255bfdb071be3ce6ac6c3069e8012179)
Windows XP SP3 Build 2600
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