> On Feb 5, 2021, at 4:08 PM, Programmingkid <programmingk...@gmail.com> wrote: > > > >> On Feb 5, 2021, at 3:49 PM, Michael S. Tsirkin <m...@redhat.com> wrote: >> >> On Fri, Feb 05, 2021 at 03:25:00PM -0500, Programmingkid wrote: >>> Hi, I'm noticing that my Windows XP Service Pack 3 VM is causing >>> qemu-system-i386 to experience 100% host cpu usage even when the guest is >>> at idle. I was wondering if you are seeing this issue as well on any >>> version of Windows guest? Windows 2000 doesn't seem to have this problem so >>> I'm wondering if this is a bug with QEMU or a problem with my VM. Any help >>> would be appreciated. >>> >>> Thank you. >> >> Just tried an xp guest, stays below 10% for me. Suggest discussing this >> on the mailing list. > > Thank you for the reply. Which service pack is your Windows XP VM using? > Hi Michael. I noticed what was the cause of Windows XP using so much CPU time when idle. When I used the '-smp 4' option Windows made a change then restarted. After restarting the screen was black. Does this happen to you? Please make a backup of any image file you have before experimenting. Windows 7 doesn't have this problem. I am qemu-system-i386 at commit 1214d55d1c41fbab3a9973a05085b8760647e411. Removing the '-smp 2' option does make Windows XP start up again, but the high host CPU usage at idle remains... I reported this bug here: https://bugs.launchpad.net/qemu/+bug/1914294
