On 16/12/2014 17:22, Oleg Ovechko wrote: >> What is your benchmark? > > I've tried different ways (CrystalDiskMark 3.0.3 x64, ATTO Disk > Banchmark v2.47) all give same result. All are run on the AHCI passthrough disk(s), right? > When everything is enabled in BIOS it is 6:23 on real Windows versus > 9:03 on virtualized... > > Phil Ehrens has sent me link > https://lists.gnu.org/archive/html/qemu-discuss/2014-10/msg00036.html > If I don't misunderstand, it means kvm/qemu simply is not designed for > multi-threading. No, it means TCG does not support multithreading. KVM does, and you are using it. > I guess I need to try different hypervisor. 50% performance is too > high price especially when VT-x and VT-d are meant to make it 0% It is surprising to me too. Paolo -- 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