On 04/05/16 04:26, Mark wrote: > Hello, I've had this problem consistently in both ubuntu server and arch > (fresh installs this week). When booting a brand new VM and the win7 > iso attached to cdrom, I am getting extremely poor performance. The > first 'Windows is loading files...' screen takes about 3 full seconds to > fill the progress bar, then starts the bar over and loads VERY slowly. > iotop shows the qemu process moving at 1100-1300K/s. > > Prior to this week, windows installs would load through the second > progress bar part in a matter of seconds. It is now taking almost 4 > minutes. I wanted to see if this was a windows iso specific issue (I > highly doubt it) and loaded and arch iso. Again, on choosing to load > arch install environment iotop reported no higher than 1133K/s, > averaging about 1100K/s during the loading. Once in the install shell, I > was able to issue a quick speed test (dd if=/dev/cdrom of=/dev/zero > bs=1M count=1024) which resulted in about 128M/s.
[snip] > <disk type='file' device='cdrom'> > <driver name='qemu' type='raw'/> > <source file='/stor/Downloads/archlinux-2016.03.01-dual.iso'/> > <target dev='hda' bus='ide'/> > <readonly/> > <address type='drive' controller='0' bus='0' target='0' unit='0'/> > </disk> This has been fixed in <https://github.com/tianocore/edk2/commit/fb8b54694c53>. Thank you for the report and subsequent testing. Laszlo _______________________________________________ vfio-users mailing list [email protected] https://www.redhat.com/mailman/listinfo/vfio-users
