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authorpmikus <pmikus@cisco.com>2021-03-03 10:13:28 +0000
committerPeter Mikus <pmikus@cisco.com>2021-03-03 17:39:11 +0000
commit1d7a226c6d9b237cdb034e40ededbfcc1094f363 (patch)
treeadc0cc8050455e4a999cb0135592b8674b81ce32 /docs/report/introduction/methodology_gso.rst
parent024975308630433b9e3f201d75090994ded2294d (diff)
Methodology: GSO
- Report methodology Signed-off-by: pmikus <pmikus@cisco.com> Change-Id: I1726af15ab003ff6ee4411ca1ceace986d3ee42b Signed-off-by: Maciek Konstantynowicz <mkonstan@cisco.com>
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+.. _gso_methodology:
+
+Generic Segmentation Offload Tests
+----------------------------------
+
+Overview
+~~~~~~~~
+
+Generic Segmentation Offload (GSO) reduces per-packet processing
+overhead by enabling applications to pass a multi-packet buffer to
+(v)NIC and process a smaller number of large packets (e.g. frame size of
+64 KB), instead of processing higher numbers of small packets (e.g.
+frame size of 1500 B), thus reducing per-packet overhead.
+
+|csit-release| introduced GSO tests for VPP vhostuser and tapv2
+interfaces. All tests cases use iPerf3 client and server applications
+running TCP/IP as a traffic generator. For performance comparison the
+same tests are run without GSO enabled.
+
+GSO Test Topologies
+~~~~~~~~~~~~~~~~~~~
+
+Two VPP GSO test topologies are implemented in |csit-release|:
+
+1. iPerfC_GSOvirtio_LinuxVM --- GSOvhost_VPP_GSOvhost --- iPerfS_GSOvirtio_LinuxVM
+
+ - Tests VPP GSO on vhostuser interfaces and interaction with Linux
+ virtio with GSO enabled.
+
+1. iPerfC_GSOtap_LinuxNspace --- GSOtapv2_VPP_GSOtapv2 --- iPerfS_GSOtap_LinuxNspace
+
+ - Tests VPP GSO on tapv2 interfaces and interaction with Linux tap
+ with GSO enabled.
+
+Common configuration:
+
+- iPerfC (client) and iPerfS (server) run in TCP/IP mode without upper
+ bandwidth limit.
+- Trial duration is set to 30 sec.
+- iPerfC, iPerfS and VPP run in the single SUT node.
+
+
+VPP GSOtap Topology
+-------------------
+
+VPP Configuration
+~~~~~~~~~~~~~~~~~
+
+VPP GSOtap tests in |csit-release| are executed without using
+hyperthreading. VPP worker runs on a single core. Multi-core tests are
+not executed. Each interface belongs to separate namespace. Following core
+pinning scheme is used:
+
+- 1t1c (rxq=1, rx_qsz=4096, tx_qsz=4096)
+
+ - system isolated: 0,28,56,84
+ - vpp mt: 1
+ - vpp wt: 2
+ - vhost: 3-5
+ - iperf-s: 6
+ - iperf-c: 7
+
+
+iPerf3 Server Configuration
+~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+iPerf3 version used 3.7
+
+::
+
+ $ sudo -E -S ip netns exec tap1_namespace iperf3 \
+ --server --daemon --pidfile /tmp/iperf3_server.pid --logfile /tmp/iperf3.log --port 5201 --affinity <X>
+
+For the full iPerf3 reference please see:
+`iPerf3 docs <https://github.com/esnet/iperf/blob/master/docs/invoking.rst>`_.
+
+
+iPerf3 Client Configuration
+~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+iPerf3 version used 3.7
+
+::
+
+ $ sudo -E -S ip netns exec tap1_namespace iperf3 \
+ --client 2.2.2.2 --bind 1.1.1.1 --port 5201 --parallel <Y> --time 30.0 --affinity <X> --zerocopy
+
+For the full iPerf3 reference please see:
+`iPerf3 docs <https://github.com/esnet/iperf/blob/master/docs/invoking.rst>`_.
+
+
+VPP GSOvhost Topology
+---------------------
+
+VPP Configuration
+~~~~~~~~~~~~~~~~~
+
+VPP GSOvhost tests in |csit-release| are executed without using
+hyperthreading. VPP worker runs on a single core. Multi-core tests are
+not executed. Following core pinning scheme is used:
+
+- 1t1c (rxq=1, rx_qsz=1024, tx_qsz=1024)
+ - system isolated: 0,28,56,84
+ - vpp mt: 1
+ - vpp wt: 2
+ - vm-iperf-s: 3,4,5,6,7
+ - vm-iperf-c: 8,9,10,11,12
+ - iperf-s: 1
+ - iperf-c: 1
+
+iPerf3 Server Configuration
+~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+iPerf3 version used 3.7
+
+::
+
+ $ sudo iperf3 \
+ --server --daemon --pidfile /tmp/iperf3_server.pid --logfile /tmp/iperf3.log --port 5201 --affinity X
+
+For the full iPerf3 reference please see:
+`iPerf3 docs <https://github.com/esnet/iperf/blob/master/docs/invoking.rst>`_.
+
+
+iPerf3 Client Configuration
+~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+iPerf3 version used 3.7
+
+::
+
+ $ sudo iperf3 \
+ --client 2.2.2.2 --bind 1.1.1.1 --port 5201 --parallel <Y> --time 30.0 --affinity X --zerocopy
+
+For the full iPerf3 reference please see:
+`iPerf3 docs <https://github.com/esnet/iperf/blob/master/docs/invoking.rst>`_. \ No newline at end of file