On Mon, Mar 10, 2008 at 11:58 AM, Dhirendra Pal Singh <[EMAIL PROTECTED]> wrote: > Hi Guys, > > I am trying to evaluate, kvm at my work for virtual support in our product.. > > I had setup up a windows guest, in my ubuntu host, on hardware with Intel VT > support. > > Now when I try to download a 1 GB file present, inside windows virtual > machine, using samba, from a another linux box, I get the following... > > > a) time when coping from windows in kvm > > linux:~/tmp # time cp /media/hdisk/1GB_text.txt . > > real 6m36.478s > > user 0m0.060s > > sys 0m8.293s > > linux:~/tmp # > > > b) time when coping from linux native.. > > linux:~/tmp/tmp # time cp /media/hdisk/1GB_text . > > real 0m49.501s > > user 0m0.040s > > sys 0m8.657s > > linux:~/tmp/tmp # > > > So its like 50second (linux native) Vs 6+minutes(windows guest in KVM), > which is huge. > > This is using user based networking, where I am just forwarding all the > netbios ports from host to guest. > > Are there any links, pointers, faqs, ideas , suggestions I could try out to > increase the performance of this kvm virtual machine? Will using public > bridge (option 3), as described on page > http://kvm.qumranet.com/kvmwiki/Networking help?
Most probably. When I was trying VMGL (http://www.cs.toronto.edu/~andreslc/xen-gl/) in KVM I got a 20-fold increase in performance when I switched from usermode networking to the tap/bridge approach. Definitely try it. I assume you are forced to use a Windows guest, but if not you might also want to try virtio (http://kvm.qumranet.com/kvmwiki/Virtio). ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ _______________________________________________ kvm-devel mailing list kvm-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/kvm-devel
