On Wed, Jun 15, 2011 at 04:58:21PM -0400, John A. Sullivan III wrote: > On Wed, 2011-06-15 at 16:08 -0400, John A. Sullivan III wrote: > > Since we were having some trouble as just outlined on our Windows tests, > > we thought we would let SPICE put its best foot forward and try a Fedora > > 15 guest running on a Fedora 15 KVM host. > > > > When it worked, it was amazing. However, most of the time, the system > > was barely responsive and the X process was consuming 100% of the CPU. > > We initially thought this might be from KDE4 so we installed twm and > > experienced the same. We then launched a few applications without any > > Windows Manager at all and saw the same results. > > > > Alon was helpful on IRC and mentioned that it was because there was no > > kernel module for the driver. > > > > Does this mean that there is no driver for the QXL driver and thus it > > runs in user space and drives up the utilization? If so, what are people > > doing who are running this in production? > > > > This leads to another question. Our understanding is that rendering is > > done on the client and not the guest unless the client is unable to do > > so (haven't read enough on the protocol to understand how this is > > determined). Does this mean that, in cases where rendering is happening > > on the guest that a high end graphics card in the physical host would > > improve performance? Our experience with using NX is that the physical > > hardware is never involved but that is a completely different paradigm. > > > > If the rendering is taking place on the client, why is the lack of a > > kernel module for QXL causing a problem? Thanks - John > > I checked my Xorg.0.log file and noticed that I was getting persistent > messages about cache failures and out of memory. It looks like the vram > parameter was set to something like 9216. > > So I changed it to 256000. To my surprise, the SPICE client connected > but I had no mouse and no keyboard. I stopped the VM and redefined it > with 128000 and I now had keyboard and video but still had the same > excessive X utilization - John
hmm.. yes, this is a well known problem - I thought libvirt fixed it. What version of libvirt are you using? The default memory is 64MB btw. > > _______________________________________________ > Spice-devel mailing list > Spice-devel@lists.freedesktop.org > http://lists.freedesktop.org/mailman/listinfo/spice-devel _______________________________________________ Spice-devel mailing list Spice-devel@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/spice-devel
