X-Git-Url: http://git.droids-corp.org/?a=blobdiff_plain;f=doc%2Fguides%2Fhowto%2Fvirtio_user_as_exceptional_path.rst;h=ec021af399d048ac8008b9818f880fe9e0e2db97;hb=01863b9d2354;hp=6a13c761e69b6a1483ee8a5afe0c3b232a16267a;hpb=5630257fcc30397e7217139ec55da4f301f59fb7;p=dpdk.git diff --git a/doc/guides/howto/virtio_user_as_exceptional_path.rst b/doc/guides/howto/virtio_user_as_exceptional_path.rst index 6a13c761e6..ec021af399 100644 --- a/doc/guides/howto/virtio_user_as_exceptional_path.rst +++ b/doc/guides/howto/virtio_user_as_exceptional_path.rst @@ -1,7 +1,7 @@ .. SPDX-License-Identifier: BSD-3-Clause Copyright(c) 2016 Intel Corporation. -.. _virtio_user_as_excpetional_path: +.. _virtio_user_as_exceptional_path: Virtio_user as Exceptional Path =============================== @@ -22,7 +22,7 @@ solution is very promising in: * Features vhost-net is born to be a networking solution, which has lots of networking - related featuers, like multi queue, tso, multi-seg mbuf, etc. + related features, like multi queue, tso, multi-seg mbuf, etc. * Performance @@ -38,7 +38,7 @@ in :numref:`figure_virtio_user_as_exceptional_path`. .. figure:: img/virtio_user_as_exceptional_path.* - Overview of a DPDK app using virtio-user as excpetional path + Overview of a DPDK app using virtio-user as exceptional path Sample Usage @@ -57,8 +57,8 @@ compiling the kernel and those kernel modules should be inserted. $(testpmd) -l 2-3 -n 4 \ --vdev=virtio_user0,path=/dev/vhost-net,queue_size=1024 \ - -- -i --txqflags=0x0 --enable-lro \ - --enable-rx-cksum --rxd=1024 --txd=1024 + -- -i --tx-offloads=0x0000002c --enable-lro \ + --txd=1024 --rxd=1024 This command runs testpmd with two ports, one physical NIC to communicate with outside, and one virtio-user to communicate with kernel. @@ -69,26 +69,29 @@ compiling the kernel and those kernel modules should be inserted. VIRTIO_NET_F_GUEST_TSO6 feature so that large packets from kernel can be transmitted to DPDK application and further TSOed by physical NIC. -* ``--enable-rx-cksum`` - - This is used to negotiate VIRTIO_NET_F_GUEST_CSUM so that packets from - kernel can be deemed as valid Rx checksumed. - * ``queue_size`` 256 by default. To avoid shortage of descriptors, we can increase it to 1024. * ``queues`` - Number of multi-queues. Each qeueue will be served by a kthread. For example: + Number of multi-queues. Each queue will be served by a kthread. For example: .. code-block:: console $(testpmd) -l 2-3 -n 4 \ --vdev=virtio_user0,path=/dev/vhost-net,queues=2,queue_size=1024 \ - -- -i --txqflags=0x0 --enable-lro \ - --enable-rx-cksum --txq=2 --rxq=2 --rxd=1024 \ - --txd=1024 + -- -i --tx-offloads=0x0000002c --enable-lro \ + --txq=2 --rxq=2 --txd=1024 --rxd=1024 + +#. Enable Rx checksum offloads in testpmd: + + .. code-block:: console + + (testpmd) port stop 0 + (testpmd) port config 0 rx_offload tcp_cksum on + (testpmd) port config 0 rx_offload udp_cksum on + (testpmd) port start 0 #. Start testpmd: