From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([140.186.70.92]:59526) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1QHjDc-0003eQ-K0 for qemu-devel@nongnu.org; Wed, 04 May 2011 17:02:53 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1QHjDb-0007AJ-N9 for qemu-devel@nongnu.org; Wed, 04 May 2011 17:02:48 -0400 Received: from mx1.redhat.com ([209.132.183.28]:35847) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1QHjDb-0007AB-A3 for qemu-devel@nongnu.org; Wed, 04 May 2011 17:02:47 -0400 Date: Thu, 5 May 2011 00:01:48 +0300 From: "Michael S. Tsirkin" Message-ID: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Subject: [Qemu-devel] [PATCH 0/3] virtio-net: 64 bit features, event index List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: Krishna Kumar , Carsten Otte , lguest@lists.ozlabs.org, Shirley Ma , kvm@vger.kernel.org, linux-s390@vger.kernel.org, habanero@linux.vnet.ibm.com, Rusty Russell , Heiko Carstens , virtualization@lists.linux-foundation.org, steved@us.ibm.com, Christian Borntraeger , Tom Lendacky , Martin Schwidefsky , linux390@de.ibm.com 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