Using a slightly modified script (injecting sudo before each qemu-img command) here's my process for testing:
1. uvt-simplestreams-libvirt --verbose sync --source http://cloud-images.ubuntu.com/daily release=trusty arch=amd64 2. uvt-kvm create --memory 1024 --cpu 1 --disk 10 trusty-test1 release=trusty arch=amd64 3. bash -x ./bench.sh trusty-test1 I ran this on up-to-date trusty and utopic on Intel NUCs with an SSD: Trusty output (only the times): real 0m0.063s (qemu-img create) real 0m25.432s (virsh block copy) real 0m4.774s (qemu-img convert) real 0m32.475s (total) Utopic output (only the times): real 0m0.054s (qemu-img create) real 0m25.862s (virsh block copy) real 0m4.895s (qemu-img convert) real 0m32.115s (total) These numbers will go up as the VMs stay up and running, which may expose different performance characteristics. Trusty Host: (kriek) ~ % dpkg --list | egrep "(libvirt|qemu)" ii ipxe-qemu 1.0.0+git-20131111.c3d1e78-2ubuntu1 all PXE boot firmware - ROM images for qemu ii libvirt-bin 1.2.2-0ubuntu13.1 amd64 programs for the libvirt library ii libvirt0 1.2.2-0ubuntu13.1 amd64 library for interfacing with different virtualization systems ii python-libvirt 1.2.2-0ubuntu1 amd64 libvirt Python bindings ii qemu-keymaps 2.0.0+dfsg-2ubuntu1 all QEMU keyboard maps ii qemu-kvm 2.0.0+dfsg-2ubuntu1 amd64 QEMU Full virtualization on x86 hardware (transitional package) ii qemu-system-common 2.0.0+dfsg-2ubuntu1 amd64 QEMU full system emulation binaries (common files) ii qemu-system-x86 2.0.0+dfsg-2ubuntu1 amd64 QEMU full system emulation binaries (x86) ii qemu-utils 2.0.0+dfsg-2ubuntu1 amd64 QEMU utilities ii uvtool-libvirt 0~bzr92-0ubuntu1 all Library and tools for using Ubuntu Cloud Images with libvirt Utopic host: (lambic) ~ % dpkg --list | egrep "(libvirt|qemu)" ii ipxe-qemu 1.0.0+git-20131111.c3d1e78-2ubuntu1 all PXE boot firmware - ROM images for qemu ii libvirt-bin 1.2.5-0ubuntu5 amd64 programs for the libvirt library ii libvirt0 1.2.5-0ubuntu5 amd64 library for interfacing with different virtualization systems ii python-libvirt 1.2.5-0ubuntu1 amd64 libvirt Python bindings ii qemu-keymaps 2.0.0+dfsg-2ubuntu3 all QEMU keyboard maps ii qemu-kvm 2.0.0+dfsg-2ubuntu3 amd64 QEMU Full virtualization on x86 hardware (transitional package) ii qemu-system-common 2.0.0+dfsg-2ubuntu3 amd64 QEMU full system emulation binaries (common files) ii qemu-system-x86 2.0.0+dfsg-2ubuntu3 amd64 QEMU full system emulation binaries (x86) ii qemu-utils 2.0.0+dfsg-2ubuntu3 amd64 QEMU utilities ii uvtool-libvirt 0~bzr92-0ubuntu1 all Library and tools for using Ubuntu Cloud Images with libvirt -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1327021 Title: regression in snapshot performance in trusty To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/libvirt/+bug/1327021/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
