I did some tests using Raring Server Beta 2. There are some interesting results for this test the results are mixing. Using different machine types produces different results. At this time i've only ran these simple "lat_syscall" tests from lmbench and haven't run some of the more exhaustive benchmarks or compilations.
Summary of the "lat_syscall" results using different machine types of qemu-kvm: pc-1.0 - affected pc-1.1 - normal pc-1.2 - affected pc-1.3 - affected pc-i440fx-1.4 - normal Test Setup Hypervisor OS: Raring Beta2 qemu: 1.4.0+dfsg-1expubuntu4 Kernel: 3.8.0-16-generic Guest: OS: Ubuntu 12.04.02 Minimal install using ubuntu-vmbuilder LMBench results for lat syscall tests ---machine type pc-1.0--- -PRESAVE- Simple read: 0.1301 microseconds Simple write: 0.1052 microseconds Simple open/close: 1.3819 microseconds -POSTRESTORE- Simple read: 0.2699 microseconds Simple write: 0.2401 microseconds Simple open/close: 1.4112 microseconds ---machine type pc-1.1--- -PRESAVE- Simple read: 0.1265 microseconds Simple write: 0.1033 microseconds Simple open/close: 1.2974 microseconds -POSTRESTORE- Simple read: 0.1266 microseconds Simple write: 0.1042 microseconds Simple open/close: 1.2093 microseconds ---machine type pc-1.2--- -PRESAVE- Simple syscall: 0.0484 microseconds Simple read: 0.1291 microseconds Simple write: 0.1042 microseconds Simple open/close: 1.2501 microseconds -POSTRESTORE- Simple syscall: 0.0485 microseconds Simple read: 0.2737 microseconds Simple write: 0.2414 microseconds Simple open/close: 1.3953 microseconds ---machine type pc-1.3--- -PRESAVE- Simple read: 0.1276 microseconds Simple write: 0.1101 microseconds Simple open/close: 1.1501 microseconds -POSTRESTORE- Simple read: 0.2717 microseconds Simple write: 0.2415 microseconds Simple open/close: 1.3997 microseconds ---machine type pc-i440fx-1.4--- -PRESAVE- Simple read: 0.1291 microseconds Simple write: 0.1039 microseconds Simple open/close: 1.2344 microseconds -POSTRESTORE- Simple read: 0.1335 microseconds Simple write: 0.1080 microseconds Simple open/close: 1.0453 microseconds -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1100843 Title: Live Migration Causes Performance Issues To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/qemu-kvm/+bug/1100843/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
