[Spice-devel] video performance in rhel/centos 7 vs fedora 20

[Scott Dowdle]

Greetings,

----- Original Message -----
> 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 at lists.freedesktop.org
> http://lists.freedesktop.org/mailman/listinfo/spice-devel

The original writer said that Fedora 20 was great and RHEL7 sucked... and you said the opposite.  Which is correct?

Here are the differences between the two:

-- RHEL7 --
libvirt-client-1.1.1-29.el7.x86_64
libvirt-daemon-1.1.1-29.el7.x86_64
libvirt-daemon-config-network-1.1.1-29.el7.x86_64
libvirt-daemon-driver-interface-1.1.1-29.el7.x86_64
libvirt-daemon-driver-network-1.1.1-29.el7.x86_64
libvirt-daemon-driver-nodedev-1.1.1-29.el7.x86_64
libvirt-daemon-driver-nwfilter-1.1.1-29.el7.x86_64
libvirt-daemon-driver-qemu-1.1.1-29.el7.x86_64
libvirt-daemon-driver-secret-1.1.1-29.el7.x86_64
libvirt-daemon-driver-storage-1.1.1-29.el7.x86_64
libvirt-daemon-kvm-1.1.1-29.el7.x86_64
libvirt-gconfig-0.1.7-3.el7.x86_64
libvirt-glib-0.1.7-3.el7.x86_64
libvirt-gobject-0.1.7-3.el7.x86_64
libvirt-python-1.1.1-29.el7.x86_64
qemu-kvm-1.5.3-60.el7_0.2.x86_64
qemu-kvm-common-1.5.3-60.el7_0.2.x86_64
spice-glib-0.20-8.el7.x86_64
spice-gtk3-0.20-8.el7.x86_64
spice-server-0.12.4-5.el7.x86_64
spice-vdagent-0.14.0-7.el7.x86_64

-- Fedora 20 --
libvirt-1.1.3.5-2.fc20.x86_64
libvirt-daemon-1.1.3.5-2.fc20.x86_64
libvirt-daemon-config-network-1.1.3.5-2.fc20.x86_64
libvirt-daemon-config-nwfilter-1.1.3.5-2.fc20.x86_64
libvirt-daemon-driver-interface-1.1.3.5-2.fc20.x86_64
libvirt-daemon-driver-libxl-1.1.3.5-2.fc20.x86_64
libvirt-daemon-driver-lxc-1.1.3.5-2.fc20.x86_64
libvirt-daemon-driver-network-1.1.3.5-2.fc20.x86_64
libvirt-daemon-driver-nodedev-1.1.3.5-2.fc20.x86_64
libvirt-daemon-driver-nwfilter-1.1.3.5-2.fc20.x86_64
libvirt-daemon-driver-qemu-1.1.3.5-2.fc20.x86_64
libvirt-daemon-driver-secret-1.1.3.5-2.fc20.x86_64
libvirt-daemon-driver-storage-1.1.3.5-2.fc20.x86_64
libvirt-daemon-driver-uml-1.1.3.5-2.fc20.x86_64
libvirt-daemon-driver-vbox-1.1.3.5-2.fc20.x86_64
libvirt-daemon-driver-xen-1.1.3.5-2.fc20.x86_64
libvirt-daemon-kvm-1.1.3.5-2.fc20.x86_64
libvirt-docs-1.1.3.5-2.fc20.x86_64
libvirt-gconfig-0.1.7-2.fc20.x86_64
libvirt-glib-0.1.7-2.fc20.x86_64
libvirt-gobject-0.1.7-2.fc20.x86_64
libvirt-python-1.1.3.5-2.fc20.x86_64
qemu-kvm-1.6.2-6.fc20.x86_64
spice-glib-0.23-2.fc20.x86_64
spice-gtk-0.23-2.fc20.x86_64
spice-gtk3-0.23-2.fc20.x86_64
spice-gtk-tools-0.23-2.fc20.x86_64
spice-server-0.12.5-2.fc20.x86_64

TYL,
-- 
Scott Dowdle
704 Church Street
Belgrade, MT 59714
(406)388-0827 [home]
(406)994-3931 [work]