On Tue, Oct 9, 2012 at 2:01 PM, Paolo Bonzini <pbonz...@redhat.com> wrote: > Il 09/10/2012 13:55, Avi Kivity ha scritto: >> Oh, agree 100% raw + native aio wants to bypass coroutines/threads >> completely. > > Even posix-aio-compat can bypass coroutines.
Yes. I'll send benchmarks to show how much overhead there is from the block layer coroutines. The reason I'm interested in the aio fastpath is because Asias benchmarked lkvm vs qemu-kvm and found that QEMU's average latency and variance are much higher. Stefan
