On 2012-02-01 15:02, Erik Rull wrote: > > On February 1, 2012 at 2:40 PM Avi Kivity <avi@xxxxxxxxxx> wrote: > >> On 02/01/2012 02:52 PM, Erik Rull wrote: >>> Hi all, >>> >>> first of all I'm a bit confused: >>> >>> What is the difference between qemu with command line option > --enable-kvm >>> and qemu-kvm? >>> It seems to be a difference in code so far, from the performance point > of >>> view it seems to be the same... >> >> The differences are being reduced rapidly, thanks to Jan's efforts. >> Right now what remains is PIT performance and accuracy, device >> assignment, and Windows XP performance. Most guests should see the same >> performance. MSI performance is expected to be worse with upstream as well, thus virtio. >> >>> Now my issue that lead me to a git bisect on qemu-kvm: >>> The following commit / merge breaks my windows guest boot sequence and >>> causes resets infinitely: >>> ec757c67c40a56492001487e69272f62144fd124 Merge branch 'upstream-merge' > into >>> next >>> Thu, 5 Jan 2012 11:00:07 +0000 (13:00 +0200) Avi Kivity > <avi@xxxxxxxxxx> >>> >>> >>> Interesting: qemu with --enable-kvm master and the same command line >>> options as qemu-kvm runs perfect. >>> My command line options are: >>> qemu-system-x86_64 -serial /dev/ttyS2 -readconfig > /etc/ich9-ehci-uhci.cfg >>> -device usb-host,bus=ehci.0 -device usb-tablet -drive >>> file=/dev/sda2,cache=off -m 1024 -net nic,macaddr=$MACADDR -net >>> tap,script=/etc/qemu-ifup -no-acpi -monitor stdio -L > /usr/X11R6/share/qemu >>> -boot c -localtime >>> >>> >> >> What version of Windows are you using? What's the contents of >> /etc/ich9-ehci-uhci.cfg? >> > > Hi Avi, > > the contents from the .cfg are located in docs/ich9-ehci-uhci.cfg > > I tried two versions of Windows XP: One is the default Windows XP SP3 that > you get from MSDN, one is Windows Embedded Standard (embedded customized > XP). > > Both show the same behavior: boots with qemu -enable-kvm and continuously > reboots with qemu-kvm. What does qemu-kvm with -no-kvm-irqchip do? Jan -- Siemens AG, Corporate Technology, CT T DE IT 1 Corporate Competence Center Embedded Linux -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
