Hello all,
I'm trying out qxl-dod in a new installation, and performance is so low that the guest is practically unusable. Redrawing takes about 4-5 seconds. I have used qxl-dod in the past on the same hardware with much better results, although the software stack is different this time. I tried disabling all visual effects, but apart from the expected gains (fewer frames to redraw after each action due to the animations' being disabled) it didn't improve usability much.
As I have no idea how to provide useful debugging information on this, I'll try to outline my configuration here for now. Please let me know if there's anything I can do to provide more meaningful information:
Host: Gentoo linux, kernel 4.9.1
Hypervizor: Xen 4.8.0
QEMU: 2.8.0 (I'm not using xen's spin of qemu)
libvirt: 2.5.0
virt-manager: 1.4.0
spice: 0.13.3
seabios: 1.10.1
Windows Guest VM is started with the following options:
/usr/libexec/xen/bin/qemu-system-i386 -xen-domid 2 -chardev socket,id=libxl-cmd,path=/run/xen/qmp-libxl-2,server,nowait -no-shutdown -mon chardev=libxl-cmd,mode=control -chardev socket,id=libxenstat-cmd,path=/run/xen/qmp-libxenstat-2,server,nowait -mon chardev=libxenstat-cmd,mode=control -nodefaults -no-user-config -name Windows -vnc none -display none -k en-us -serial pty -spice port=5901,tls-port=0,disable-ticketing,agent-mouse=on,disable-copy-paste -device qxl-vga,vram_size_mb=64,ram_size_mb=64 -boot order=cd -smp 2,maxcpus=2 -device rtl8139,id=nic0,netdev=net0,mac=00:16:3e:25:27:01 -netdev type=tap,id=net0,ifname=vif2.0-emu,script=no,downscript=no -machine xenfv -m 1920 -drive file=/dev/zvol/tank/windows,if=ide,index=0,media=disk,format=raw,cache=writeback -drive if=ide,index=1,readonly=on,media=cdrom,id=ide-832,file=/home/gd/Downloads/ISOs/SW_DVD5_WIN_ENT_N_LTSB_2016_64BIT_Eng_Intl_MLF_X21-07527.ISO,format=raw
I have used both vrozenfe binaries and flexvdi binaries: it made no difference at all...
Also note that the mouse cursor is generally responsive. It will only lag for a bit when hovering over items that need some refreshing (e.g. highlighting).
BR,
George
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