Re: [Qemu-devel] qxl performance problems and spice issues

[Alon Levy]

On Thu, May 17, 2012 at 11:04:55AM +0200, address@hidden wrote:
> Hello,
> 
> I am testing Xen 4.2 (unstable) with Qemu 1.1rc2 and spice.
> I have severe video performance problems on Windows 7 guest and X fails to 
> run on
> Debian wheezy and Ubuntu Precise guest.

What version of drivers (windows guest, linux guest) do you have? what
performance problems do you see, what are you doing in the guest? what
is the X log for the failed run?

> The problem may be related to Xen and I'm asking there too, but I want to make
> sure my invocation is correct as far as Qemu is concerned.
> 
> If someone is experimenting with spice and has qxl video, vdagent, audio and 
> usb
> redirection working, can you post your Qemu and SeaBIOS version and exact Qemu
> invocation, so that I can try to replicate your results.
> 
> Are qxl and other spice features dependent on kvm in some way?
We don't depend on kvm but I have never tried without it.

> Should I use -vga qxl or -device qxl-vga?
I use -vga qxl, but I think they should be equivalent.

The command line looks ok. Try using 64MB for both (i.e. 128MB in total)
instead of the 32MB you have for each.
> 
> Thanks,
> LG
> 
> Here is Qemu invocation by xl:
> --------------------------
> libxl: debug: libxl_dm.c:1001:libxl__spawn_local_dm: Spawning device-model 
> /usr/
> lib/xen/bin/qemu-system-i386 with arguments:
> libxl: debug: libxl_dm.c:1003:libxl__spawn_local_dm:  
> /usr/lib/xen/bin/qemu-system-i386
> libxl: debug: libxl_dm.c:1003:libxl__spawn_local_dm:   -xen-domid
> libxl: debug: libxl_dm.c:1003:libxl__spawn_local_dm:   8
> libxl: debug: libxl_dm.c:1003:libxl__spawn_local_dm:   -chardev
> libxl: debug: libxl_dm.c:1003:libxl__spawn_local_dm:  
> socket,id=libxl-cmd,path=/var/run/xen/qmp-libxl-8,server,nowait
> libxl: debug: libxl_dm.c:1003:libxl__spawn_local_dm:   -mon
> libxl: debug: libxl_dm.c:1003:libxl__spawn_local_dm:   
> chardev=libxl-cmd,mode=control
> libxl: debug: libxl_dm.c:1003:libxl__spawn_local_dm:   -name
> libxl: debug: libxl_dm.c:1003:libxl__spawn_local_dm:   W7
> libxl: debug: libxl_dm.c:1003:libxl__spawn_local_dm:   -spice
> libxl: debug: libxl_dm.c:1003:libxl__spawn_local_dm:  
> port=6000,tls-port=0,addr=0.0.0.0,disable-ticketing,agent-mouse=on
> libxl: debug: libxl_dm.c:1003:libxl__spawn_local_dm:   -boot
> libxl: debug: libxl_dm.c:1003:libxl__spawn_local_dm:   order=cd
> libxl: debug: libxl_dm.c:1003:libxl__spawn_local_dm:   -smp
> libxl: debug: libxl_dm.c:1003:libxl__spawn_local_dm:   2,maxcpus=3
> libxl: debug: libxl_dm.c:1003:libxl__spawn_local_dm:   -device
> libxl: debug: libxl_dm.c:1003:libxl__spawn_local_dm:  
> rtl8139,id=nic0,netdev=net0,mac=00:16:3e:6b:1f:d9
> libxl: debug: libxl_dm.c:1003:libxl__spawn_local_dm:   -netdev
> libxl: debug: libxl_dm.c:1003:libxl__spawn_local_dm:  
> type=tap,id=net0,ifname=vif8.0-emu,script=no,downscript=no
> libxl: debug: libxl_dm.c:1003:libxl__spawn_local_dm:   -device
> libxl: debug: libxl_dm.c:1003:libxl__spawn_local_dm:   qxl-vga
> libxl: debug: libxl_dm.c:1003:libxl__spawn_local_dm:   -global
> libxl: debug: libxl_dm.c:1003:libxl__spawn_local_dm:   
> qxl-vga.vram_size=33554432
> libxl: debug: libxl_dm.c:1003:libxl__spawn_local_dm:   -global
> libxl: debug: libxl_dm.c:1003:libxl__spawn_local_dm:   
> qxl-vga.ram_size=33554432
> libxl: debug: libxl_dm.c:1003:libxl__spawn_local_dm:   -device
> libxl: debug: libxl_dm.c:1003:libxl__spawn_local_dm:  
> virtio-serial-pci,id=virtio-serial0,max_ports=16
> libxl: debug: libxl_dm.c:1003:libxl__spawn_local_dm:   -chardev
> libxl: debug: libxl_dm.c:1003:libxl__spawn_local_dm:  
> spicevmc,name=vdagent,id=vdagent
> libxl: debug: libxl_dm.c:1003:libxl__spawn_local_dm:   -device
> libxl: debug: libxl_dm.c:1003:libxl__spawn_local_dm:  
> virtserialport,nr=1,bus=virtio-serial0.0,chardev=vdagent,name=com.redhat.spice.0
> libxl: debug: libxl_dm.c:1003:libxl__spawn_local_dm:   -M
> libxl: debug: libxl_dm.c:1003:libxl__spawn_local_dm:   xenfv
> libxl: debug: libxl_dm.c:1003:libxl__spawn_local_dm:   -m
> libxl: debug: libxl_dm.c:1003:libxl__spawn_local_dm:   1792
> libxl: debug: libxl_dm.c:1003:libxl__spawn_local_dm:   -drive
> libxl: debug: libxl_dm.c:1003:libxl__spawn_local_dm:  
> file=/mnt/vm/disks/W7.disk1.xm,if=ide,index=0,media=disk,format=raw
> 
> -- 
> 
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