ping Cheers Vincenzo
2014-01-20 Vincenzo Maffione <v.maffi...@gmail.com>: > The purpose of this patch series is to add offloadings support > (TSO/UFO/CSUM) to the netmap network backend, and make it possible > for the paravirtual network frontends (virtio-net and vmxnet3) to > use it. > In order to achieve this, these patches extend the existing > net.h interface to add abstract operations through which a network > frontend can manipulate backend offloading features, instead of > directly calling TAP-specific functions. > > Guest-to-guest performance before this patches for virtio-net + netmap: > > TCP_STREAM 5.0 Gbps > TCP_RR 12.7 Gbps > UDP_STREAM (64-bytes) 790 Kpps > > Guest-to-guest performance after this patches for virtio-net + netmap: > > TCP_STREAM 21.4 Gbps > TCP_RR 12.7 Gbps > UDP_STREAM (64-bytes) 790 Kpps > > Experiment details: > - Processor: Intel i7-3770K CPU @ 3.50GHz (8 cores) > - Memory @ 1333 MHz > - Host O.S.: Archlinux with Linux 3.11 > - Guest O.S.: Archlinux with Linux 3.11 > > - QEMU command line: > qemu-system-x86_64 archdisk.qcow -snapshot -enable-kvm -device > virtio-net-pci,ioeventfd=on,mac=00:AA:BB:CC:DD:01,netdev=mynet -netdev > netmap,ifname=vale0:01,id=mynet -smp 2 -vga std -m 3G > > > ******** Changes against the previous version *********** > NOTE: Now the VALE switch supports the offloadings, meaning that TCP/UDP > will work > even between a virtio-net guest with offloadings enabled and another > guest with offloadings disabled. This has been achieved without > performance loss > on the "fast" case (e.g. two virtio-net-guest communicating with > offloadings on). > > (1) removed the second commit of the previous version, which was > intended to remove tap_using_vnet_hdr() > (2) the last commit has been revised: NETMAP_BDG_OFFSET becomes > NETMAP_BDG_VNET_HDR, netmap_set_offload() implemented and > netmap_has_vnet_hdr_len() rewritten. > > > Vincenzo Maffione (5): > net: change vnet-hdr TAP prototypes > net: extend NetClientInfo for offloading > net: TAP uses NetClientInfo offloading callbacks > net: virtio-net and vmxnet3 use offloading API > net: add offloading support to netmap backend > > hw/net/virtio-net.c | 16 +++++-------- > hw/net/vmxnet3.c | 12 ++++------ > include/net/net.h | 19 +++++++++++++++ > include/net/tap.h | 4 ++-- > net/net.c | 55 +++++++++++++++++++++++++++++++++++++++++++ > net/netmap.c | 68 > ++++++++++++++++++++++++++++++++++++++++++++++++++++- > net/tap-win32.c | 8 +++---- > net/tap.c | 12 +++++++--- > 8 files changed, 167 insertions(+), 27 deletions(-) > > -- > 1.8.5.2 > > -- Vincenzo Maffione
