Hello, the host runs on a Dual-Core AMD Opteron Processor. Does there exist a similar AMD parameter? Regard Stefanie -----Ursprüngliche Nachricht----- Von: Avi Kivity [mailto:avi@xxxxxxxxxx] Gesendet: Samstag, 11. April 2009 18:19 An: BRAUN, Stefanie Cc: kvm@xxxxxxxxxxxxxxx Betreff: Re: AW: AW: AW: KVM performance BRAUN, Stefanie wrote: > Hello, > > now I was able to start the guest vmu with disk virtio, and some of > the tests with disk involvement even improved a bit. > But the test in which a logo is added to the video stream does not > improve. I don't know why the performance is so bad? > > Subtest: Reading video locally, adding a logo to the video stream and > then saving the video locally > Host performance: 50% > kvm process in host (top) : 99% > vlc process in vmu (top) : 99% > > > The output of kvm_stat -1 during the subtest is the following: > > efer_reload 0 0 > exits 9913473 3994 > This indicates that kvm is running in guest mode all of the time and is therefore quite efficient. Perhaps the test uses sse instructions which kvm doesn't expose? Try adding -cpu core2duo to the command line. -- Do not meddle in the internals of kernels, for they are subtle and quick to panic. -- 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
