Il 16/12/2012 19:55, Andrew Cathrow ha scritto: >> After the install and the resulting patch orgy finished, I noticed >> that the KVM-based Windows install was running much slower than an >> existing Windows 7 guest running under VirtualBox (on the same >> hardware and a similiarly configured VM), which is odd since >> sparkling new Windows installs usually tend to run much better than >> an > > Where you using virtio-blk or emulated IDE? Also, if you're using virtio-blk, can you cut-and-paste the libvirt XML? Check that it does not have cache='writethrough'. Paolo > > >> install that has been used for months. A few benchmarks showed that >> the KVM-based Windows suffers from I/O performance that is almost an >> order of magnitude slower than the one running based on VirtualBox. >> >> I would like to know whether I did something wrong, or if there is >> another way to achieve compareable I/O performance in a Windows VM on >> KVM than it is reachable with a trivial VirtualBox installation. >> >> On another point: The VirtualBox graphics drivers for Windows have an >> option to couple the Windows desktop size to the size of the guest >> Window. That is, when I resize the X11 Window that shows the VM >> desktop, the desktop is automatically resized to fill the window >> completely. > > Try using spice with the windows guest tools which will give you copy and paste, cursor handling, resolution matching etc. > http://www.spice-space.org/download.html > >> >> On KVM, I understand that the canonical way to run Windows in a VM is >> to use the graphics drivers from VMWare as the graphics card emulated >> by qemu-kvm is VMWare compatible. But it looks like this doesn't work >> since Windows claims to have a "Standard VGA graphics adapter" which >> is rather slow and only offers a list of standard screen resolutions >> which also does not adapt to window size. I guess this is an issue >> that I better address on a LibVirt mailing list, right? >> >> I would appreciate any comments, and - if appropriate - pointers to >> other mailing lists that may help with getting Windows 7 to run >> better >> under KVM. >> >> Greetings >> Marc >> >> -- >> ----------------------------------------------------------------------------- >> Marc Haber | "I don't trust Computers. They | Mailadresse im >> Header >> Mannheim, Germany | lose things." Winona Ryder | Fon: *49 621 >> 31958061 >> Nordisch by Nature | How to make an American Quilt | Fax: *49 621 >> 31958062 >> -- >> To unsubscribe from this list: send the line "unsubscribe kvm" in >> the body of a message to majordomo@xxxxxxxxxxxxxxx >> More majordomo info at http://vger.kernel.org/majordomo-info.html >> > -- > To unsubscribe from this list: send the line "unsubscribe kvm" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html > -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
