OK, here's a patch that implements the virtio spec update that I sent earlier. It supercedes the PUBLISH_USED_IDX patches I sent out earlier. Support is added in both userspace and vhost-net. I see nice performance improvements: e.g. from 12 to 18 Gbit/s host to guest with netperf, but did not spend a lot of time testing performance. I hope others will try this out and report. Note: there are 2 new features, reducing the number of interrupts (used_event) and of exits (avail_event). If you see issues or are just curious, you can turn them off separately. For example: -global virtio-net-pci.avail_event=on -global virtio-net-pci.used_event=on -global virtio-blk-pci.avail_event=off -global virtio-blk-pci.used_event=off Also, it's possible to try both vhost-net and virtio-net. Michael S. Tsirkin (3): virtio/vhost: support 64 bit features virtio+vhost: used_event feature virtio: avail_event index support hw/qdev-properties.c | 39 +++++++++++++--- hw/qdev.h | 10 ++++ hw/s390-virtio-bus.c | 5 +- hw/s390-virtio-bus.h | 2 +- hw/syborg_virtio.c | 7 ++- hw/vhost_net.c | 20 +++++++-- hw/vhost_net.h | 4 +- hw/virtio-9p.c | 2 +- hw/virtio-balloon.c | 2 +- hw/virtio-blk.c | 2 +- hw/virtio-blk.h | 2 +- hw/virtio-net.c | 11 +++-- hw/virtio-net.h | 34 +++++++------- hw/virtio-pci.c | 91 +++++++++++++++++++++++++++---------- hw/virtio-serial-bus.c | 2 +- hw/virtio.c | 116 ++++++++++++++++++++++++++++++++++++++++++------ hw/virtio.h | 27 ++++++++--- 17 files changed, 284 insertions(+), 92 deletions(-) -- 1.7.5.53.gc233e -- 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
