Hello, I'm using -smp option to enable several cpu on the guest. I noticed that the cpu 1 (cpu 2 in htop) is not used at all by the guest even under stress test programme.
Qemu started with: qemu-system-i386 -cpu n270,check -smp 3 -usbdevice keyboard \ -name qemu-img -drive file=qemu-img.qcow2,media=disk,cache=writeback On the guest: $ stress --cpu 8 & $ htop htop: 1 [###################100%] 2 [ 0%] 3 [###################100%] It seems strange that the cpu 1 remains idle. I'm using qemu 1.5.3 host: debian 7 (32bis) guest: custom OS (32bis) (buildroot based) With lastest qemu from git (qemu-1.6.50), the cpu 2 is tuck at 50% htop: 1 [##############*****100%] 2 [*********** 50%] 3 [###################100%] Another test with kvm enabled (qemu-1.6.50): qemu-system-i386 -cpu host -enable-kvm -smp 3 -usbdevice keyboard \ -name qemu-img -drive file=qemu-img.qcow2,media=disk,cache=writeback htop: 1 [###################100%] 2 [ 0%] 3 [###################100%] Only 2 cpu are used on the host. There is a known issue with smp option ? Thanks, -- Romain Naour OPEN WIDE Ingénierie - Paris 23/25, rue Daviel| 75013 PARIS http://ingenierie.openwide.fr Le blog des technologies libres et embarquées : http://www.linuxembedded.fr
