Kernel and subsequently QEMU learned multiple transmit queues a while ago. The feature has a nice advantage, it alloes a single guest to transmit multiple flows of network data using multiple CPUs simultaneously which increase traffic bandwidth. A lot. The documentation how to use this is available at [1] or [2]. 1: https://git.kernel.org/cgit/linux/kernel/git/davem/net-next.git/tree/Documentation/networking/tuntap.txt 2: http://git.qemu.org/?p=qemu.git;a=blob;f=qemu-options.hx;hb=HEAD#l1363 Michal Privoznik (12): Introduce /domain/devices/interface/driver/@queues attribute qemu: Move interface cmd line construction into a separate function qemu: Make qemuMonitorAddHostNetwork to pass multiple FDs qemu: Make qemuMonitorAddHostNetwork to pass multiple FDs qemu: Adapt command line generation to multiqueue net util: Learn virNetDevTapCreate multiqueue network qemu: Allow multiple vhost-net openings qemu: Rework qemuNetworkIfaceConnect qemu: Adapt qemuDomainAttachNetDevice to multiqueue net qemu: Change qemuOpenVhostNet return value qemu: Adapt qemuBuildInterfaceCommandLine to to multiqueue net qemu: Enable multiqueue network docs/formatdomain.html.in | 11 +- docs/schemas/domaincommon.rng | 5 + src/conf/domain_conf.c | 15 + src/conf/domain_conf.h | 1 + src/network/bridge_driver.c | 2 +- src/qemu/qemu_command.c | 527 +++++++++++++-------- src/qemu/qemu_command.h | 13 +- src/qemu/qemu_domain.c | 27 +- src/qemu/qemu_hotplug.c | 99 ++-- src/qemu/qemu_monitor.c | 78 +-- src/qemu/qemu_monitor.h | 8 +- src/uml/uml_conf.c | 5 +- src/util/virnetdevtap.c | 105 ++-- src/util/virnetdevtap.h | 2 + tests/qemuxml2argvdata/qemuxml2argv-event_idx.xml | 2 +- .../qemuxml2argv-net-virtio-device.xml | 2 +- .../qemuxml2argvdata/qemuxml2argv-vhost_queues.xml | 50 ++ tests/qemuxml2argvdata/qemuxml2argv-virtio-lun.xml | 2 +- tests/qemuxml2xmltest.c | 1 + 19 files changed, 616 insertions(+), 339 deletions(-) create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-vhost_queues.xml -- 1.8.1.5 -- libvir-list mailing list libvir-list@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/libvir-list