Xiaodong Yi wrote: > Hi, > > I've tested the guest Linux using UnixBench 5.1.2. The platform is: > * Intel's Core Due CPU with 2 cores, 2GB RAM > * CentOS 5.2 as the dom0 Linux, i.e., the host Linux for KVM > * CentOS 5.2 as the guest Linux, i.e., the Linux running on the > virtual machine provided by Qemu > > The first set of results is for Luvalley, and the second one is for > KVM. As the result, Luvalley's guest Linux is 20% ~ 30% faster than > KVM's guest! It is very surprise to me. I had through Luvalley's guest > should be the same performance as KVM's. > > Yes, it is surprising. > Double-Precision Whetstone 12287.7 MWIPS (10.0 s, 2 samples) > Double-Precision Whetstone 2166.3 MWIPS (10.2 s, 2 samples That's by far the biggest difference. Can you confirm it isn't a typo? If not, then it looks like we have a bug in floating point handling. I don't think this benchmark uses sse. -- Do not meddle in the internals of kernels, for they are subtle and quick to panic. -- 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
