On Wed, Nov 30, 2011 at 01:55:53PM +0200, Ohad Ben-Cohen wrote: > On Tue, Nov 29, 2011 at 5:19 PM, Michael S. Tsirkin <mst@xxxxxxxxxx> wrote: > > On Tue, Nov 29, 2011 at 03:57:19PM +0200, Ohad Ben-Cohen wrote: > >> > Is an extra branch faster or slower than reverting d57ed95? > >> > >> Sorry, unfortunately I have no way to measure this, as I don't have > >> any virtualization/x86 setup. I'm developing on ARM SoCs, where > >> virtualization hardware is coming, but not here yet. > > > > You can try using the micro-benchmark in tools/virtio/. > > Hmm, care to show me exactly what do you mean ? make headers_install make -C tools/virtio/ (you'll need an empty stub for tools/virtio/linux/module.h, I just sent a patch to add that) sudo insmod tools/virtio/vhost_test/vhost_test.ko ./tools/virtio/virtio_test > Though I somewhat suspect that any micro-benchmarking I'll do with my > random ARM SoC will not have much value to real virtualization/x86 > workloads. > > Thanks, > Ohad. Real virtualization/x86 can keep using current smp_XX barriers, right? We can have some config for your kind of setup. -- MST -- 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
