[Bug 1914667] Re: High cpu usage when guest is idle on qemu-system-i386

[Launchpad Bug Tracker]

[Expired for QEMU because there has been no activity for 60 days.]

** Changed in: qemu
       Status: Incomplete => Expired

-- 
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/1914667

Title:
  High cpu usage when guest is idle on qemu-system-i386

Status in QEMU:
  Expired

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

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1914667/+subscriptions