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.
After updating QEMU to 1214d55d1c41fba b3a9973a05085b8 760647e411, 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.