Re: [Qemu-devel] [Bug 1174654] Re: qemu-system-x86_64 takes 100% CPU after host machine resumed from suspend to ram

[mike <qiudayu@linux.vnet.ibm.com>]

On 10/18/2013 03:12 PM, tobias wrote:
> Hello Mike,
>
> Thanks a lot for getting back on this.
> Is the "cpu idle driver" a command line option I need to specify for
> qemu (the -cpu option ?)
> I could not find a reference to "idle" in the man page.
You need to check the guest kernel config file.

Thanks
Mike
> regards,
>
> Tobias.
>
> On 18-10-13 04:33, mike wrote:
>> On 10/18/2013 04:29 AM, tobias wrote:
>>> hi,
>>>
>>> tried your option but it does not help. (cpu usage is still high)
>>> below my command line syntax:
>>> qemu-system-x86_64 -global mc146818rtc.lost_tick_policy=slew -machine
>>> accel=kvm:tcg -name win7 -S -machine pc-i440fx-1.4,accel=kvm,usb=off
>>> -m 2048 -realtime mlock=off -smp 1,sockets=1,cores=1,threads=1 -uuid
>>> 813f5806-64ec-3319-452a-5e1834e753c9 -no-user-config -nodefaults
>>> -chardev
>>> socket,id=charmonitor,path=/var/lib/libvirt/qemu/win7.monitor,server,nowait
>>> -mon chardev=charmonitor,id=monitor,mode=control -rtc base=localtime
>>> -no-shutdown -device ich9-usb-ehci1,id=usb,bus=pci.0,addr=0x5.0x7
>>> -device
>>> ich9-usb-uhci1,masterbus=usb.0,firstport=0,bus=pci.0,multifunction=on,addr=0x5
>>> -device
>>> ich9-usb-uhci2,masterbus=usb.0,firstport=2,bus=pci.0,addr=0x5.0x1
>>> -device
>>> ich9-usb-uhci3,masterbus=usb.0,firstport=4,bus=pci.0,addr=0x5.0x2
>>> -device virtio-serial-pci,id=virtio-serial0,bus=pci.0,addr=0x8 -drive
>>> file=/data/vmware/win7.img,if=none,id=drive-virtio-disk0,format=qcow2
>>> -device
>>> virtio-blk-pci,scsi=off,bus=pci.0,addr=0x6,drive=drive-virtio-disk0,id=virtio-disk0,bootindex=1
>>> -device usb-tablet,id=input0 -device
>>> intel-hda,id=sound0,bus=pci.0,addr=0x4 -device
>>> hda-duplex,id=sound0-codec0,bus=sound0.0,cad=0 -device
>>> virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x7 -vga std
>> Hi, have you enable the kernel CPU idle driver?  especially the guest
>> kernel.
>>
>> Thanks
>> Mike
>>