On Mon, 07/22 13:51, Yaodong Yang wrote: > Hi everyone, > > Previously, I used the qemu-kvm-1.2.0 from > (http://www.linux-kvm.org/page/Downloads), and it worked well in my ubuntu > server. Later, I found that some of the implementation(qemu-kvm-1.2.0) is out > of date, so that I changed to qemu-1.5.1 (http://wiki.qemu.org/Download). I > found that installing a guest ubuntu vm (qcow2 backup images) in qemu-1.5.1 > is much slower than that in qemu-kvm-1.2.0. > > So could someone tell me the differences between them? particularly why the > qemu-1.5.1 is slower than the qemu-kvm-1.2.0. > > I would like to implement something in the io path. My platform is a x86 > 64bit server, and my host os is ubuntu 12.04 desktop, 64 bits. >
Are you using KVM? If not, please use --enable-kvm to compile QEMU with kvm support and run with '-enable-kvm'. What's your command to run it? -- Fam
