> > Hi, > > I experience stuttering video playback in remote-viewer despite connecting > via GBit/s LAN, using fast hardware and the QXL driver. > Up until a video size of roughly 800x600 the playback is smooth. But on > anything bigger, like my native resolution of 2540x1440, video playback is > stuttering annoyingly. > After lots of unsuccessful tinkering with spice parameters and qxl parameters > I'm asking you guys for help. > > Client: > Windows 10 1909 > Remote Viewer 8.0-256 > Quadcore i7-7820HQ 2.9GHz > 16GB DDR4 RAM > > Host of the VM: > Gentoo Linux > Kernel 4.14.172 > Qemu 4.2.0 > Quadcore i7-7700K 4.2GHz > 64GB DDR4 RAM > Server is headless, has no dedicated graphics card, only the Intel HD 630 > from the CPU > > Guest VM: > Debian Bullseye > I don't think it's guest related, because the same problem happens with a > Windows 10 Guest with latest QXL drivers and spice-tools installed. > > Network performance client<=>host: > Ping 0.2ms > Throughput benchmarked at 960MBit/s > > Qemu invocation on host: > #qemu-system-x86_64 > -spice port=5906,addr=10.42.2.250,password=changed > -vga none -device > qxl-vga,ram_size_mb=128,vgamem_mb=32,vram_size_mb=128,vram64_size_mb=256,max_outputs=1 > -M q35 -smp 2 -cpu host --enable-kvm > -drive file=vmfllin.raw,if=virtio,format=raw,index=0,cache=none,aio=native -m > 24576 > -net nic,model=virtio,macaddr=52:54:00:74:01:06 -net > tap,ifname=vmfllin,script=no,downscript=no -k de > -monitor tcp:127.0.0.1:5956,server,nowait > -device virtio-serial,id=virtio-serial1 > -chardev spicevmc,id=vdagent,debug=0,name=vdagent > -device > virtserialport,bus=virtio-serial1.0,chardev=vdagent,name=com.redhat.spice.0 > -rtc base=utc,clock=host -daemonize --device virtio-balloon -boot c > -nodefaults -soundhw hda > > Spice parameters I tried: > -spice > streaming-video=all,image-compression=off,jpeg-wan-compression=never,zlib-glz-wan-compression=never,playback-compression=off Why playback-compression off ? The streaming-video should help quite a lot, at least if you play videos. And why image-compression is also off? Without compression and 1GB/s connection at your resolution you fill all the bandwidth with just 8 frames per second. > -spice > streaming-video=off,image-compression=off,jpeg-wan-compression=never,zlib-glz-wan-compression=never,playback-compression=off > > Guest kernel: > Linux guest 5.4.0-4-amd64 #1 SMP Debian 5.4.19-1 (2020-02-13) x86_64 > GNU/Linux > guest kernel: qxl 0000:00:03.0: remove_conflicting_pci_framebuffers: bar 0: > 0xe8000000 -> 0xefffffff > guest kernel: qxl 0000:00:03.0: remove_conflicting_pci_framebuffers: bar 1: > 0xf0000000 -> 0xf7ffffff > guest kernel: qxl 0000:00:03.0: remove_conflicting_pci_framebuffers: bar 2: > 0xf8054000 -> 0xf8055fff > guest kernel: qxl 0000:00:03.0: remove_conflicting_pci_framebuffers: bar 4: > 0xd0000000 -> 0xdfffffff > guest kernel: qxl 0000:00:03.0: vgaarb: deactivate vga console > guest kernel: [drm] Device Version 0.0 > guest kernel: [drm] Compression level 0 log level 0 > guest kernel: [drm] 24574 io pages at offset 0x2000000 > guest kernel: [drm] 33554432 byte draw area at offset 0x0 > guest kernel: [drm] RAM header offset: 0x7ffe000 > guest kernel: [drm] qxl: 32M of VRAM memory size > guest kernel: [drm] qxl: 127M of IO pages memory ready (VRAM domain) > guest kernel: [drm] qxl: 256M of Surface memory size > guest kernel: [drm] slot 0 (main): base 0xe8000000, size 0x07ffe000, > gpu_offset 0x20000000000 > guest kernel: [drm] slot 1 (surfaces): base 0xd0000000, size 0x10000000, > gpu_offset 0x30000000000 > guest kernel: [drm] Initialized qxl 0.1.0 20120117 for 0000:00:03.0 on minor > 0 > guest kernel: fbcon: qxldrmfb (fb0) is primary device > guest kernel: qxl 0000:00:03.0: fb0: qxldrmfb frame buffer device > > Guest X-Org: > X.Org X Server 1.20.8 > [ 205.516] (II) LoadModule: "qxl" > [ 205.516] (II) Loading /usr/lib/xorg/modules/drivers/qxl_drv.so > [ 205.518] (II) Module qxl: vendor="X.Org Foundation" > [ 205.520] (II) qxl: Driver for QXL virtual graphics: QXL 1 > [ 205.525] (II) qxl(0): Creating default Display subsection in Screen > section > [ 205.525] (==) qxl(0): Depth 24, (--) framebuffer bpp 32 > [ 205.525] (==) qxl(0): RGB weight 888 > [ 205.525] (==) qxl(0): Default visual is TrueColor > [ 205.525] (==) qxl(0): Using gamma correction (1.0, 1.0, 1.0) > [ 205.525] (II) qxl(0): Deferred Frames: Disabled > [ 205.525] (II) qxl(0): Offscreen Surfaces: Enabled > [ 205.525] (II) qxl(0): Image Cache: Enabled > [ 205.525] (II) qxl(0): Fallback Cache: Enabled > [ 205.525] (==) qxl(0): DPI set to (96, 96) > # glxgears > 9709 frames in 5.0 seconds = 1941.675 FPS > 11719 frames in 5.0 seconds = 2343.780 FPS > > Remote-Viewer console output on Windows client: > "C:\Program Files\VirtViewer v8.0-256\bin\remote-viewer.exe" > --hotkeys=toggle-fullscreen=shift+f11 spice://10.42.2.250:5906 > (remote-viewer.exe:16324): GSpice-CRITICAL **: 08:00:32.467: > _usbdk_hider_update: assertion 'priv->usbdk_api != NULL' failed > (remote-viewer.exe:16324): GSpice-CRITICAL **: 08:00:32.526: file > ../../src/usb-device-manager.c: line 1815 (probe_isochronous_endpoint): > should not be reached > (remote-viewer.exe:16324): Gtk-WARNING **: 08:00:32.950: Theme directory > 256x256@2/animations of theme hicolor has no size field > (remote-viewer.exe:16324): Spice-WARNING **: 08:00:50.804: > ../../src/channel-display-gst.c:715:gstvideo_has_codec: No video decoders > from GStreamer were found > (remote-viewer.exe:16324): GSpice-CRITICAL **: 08:00:50.912: > _usbdk_hider_update: assertion 'priv->usbdk_api != NULL' failed > (remote-viewer.exe:16324): GSpice-WARNING **: 08:00:50.919: Warning no > automount-inhibiting implementation available > > Thanks, > Felix _______________________________________________ Spice-devel mailing list Spice-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/spice-devel