On Thu, 2009-07-23 at 13:56 -0400, Cole Robinson wrote: > On 07/23/2009 01:34 PM, Mark McLoughlin wrote: > > Hey, > > Here's a series of patches to implement danpb's suggestion of > > using 'qemu -M ?' to probe for valid machine types and then to build > > on that for the machine type canonicalization. > > > > Cheers, > > Mark. > > > > What's the speed difference of GetCapabilities after these patches? Not > that it needs to be fast, but it would be useful to know if it's > slowwwwwwww. It's a fair point, especially since it wasn't long ago we discussed this: http://www.redhat.com/archives/libvir-list/2009-April/msg00537.html I took your little script, made it do 100 iterations, ran that 20 times on F-11 and averaged the results: - Before this series of patches, it's averaging at 10ms, giving 100us per call - After this series with only qemu-system-x86 installed, it's averaging at 1.7s, giving 17ms per call - With qemu-system-arm/mips/ppc/sparc and xenner installed, it's averaging at 5.8s, giving 58ms per call 60ms vs 100us is a huge slowdown, relatively speaking. Is 60ms an unacceptable worst-case got a GetCapabilities call? Probably not, but it is certainly approaching unacceptable. Cheers, Mark. -- Libvir-list mailing list Libvir-list@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/libvir-list