Hi ----- Original Message ----- > Hi All, > > We have been piloting deployments of VM using Fedora 20 host and guest > and have been very happy with performance and stability in almost every > respect, so a big thanks to all for this hard work. Things are looking > great. > > Now we have been testing deployments of these same VMs (F20 guests) on > rhel 7 (centos 7). We migrated one over and one of the issues seems to > be a severe degradation of video performance vis-a-vis the F20 host. The difference between rhel7 and f20 host is quite surprising. I get quite bad performance with f20 host as well (spice 0.12.4-3, qemu 2.0.0-5) Are your host configured with the same spice settings (in particular streaming-video and other compression settings) ? > The setup is a C7 host, F20 guest and either C7 or F20 client, either > local to the host or on the LAN. > > In this setup, the video plays fine for a few seconds, but eventually > degrades to about 1fps with severe tearing of the video. Video does > remain in sync with audio and there are no audio breakups. > > Any pointers on things to try? I have been investigating some video rendering issues with rhel7 guest on rhel7 host, see https://bugzilla.redhat.com/show_bug.cgi?id=1030024 However, even with the cogl fix and "PutImage BIG-REQUEST", the video regions seems to vary too much for the Spice video filter to perform well (using firefox/html5 video youtube). I believe it will need to be improved. (the cogl fix allows much more accurate region invalidation, the big-request allows to update whole region atomically and not by chunks) > I'm willing to rebuild some host components (e.g. spice-server or qemu > or whatever) or try some patches or configuration changes to address > this to track it down. Your help would be most welcome to investigate and improve this further. _______________________________________________ Spice-devel mailing list Spice-devel@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/spice-devel