aboutsummaryrefslogtreecommitdiffstats
path: root/docs/content/methodology/generic_segmentation_offload.md
diff options
context:
space:
mode:
authorpmikus <peter.mikus@protonmail.ch>2023-03-15 15:15:48 +0000
committerpmikus <peter.mikus@protonmail.ch>2023-03-15 15:15:48 +0000
commit22999c2df14eb455080ff0a09bf93dc795a4049f (patch)
tree21ed91e3b3461b64801e693aa797e3a30293783b /docs/content/methodology/generic_segmentation_offload.md
parent2986c774cd6520cab7e7e380e1511d521e8afe04 (diff)
feat(docs): Add Methodology
Signed-off-by: pmikus <peter.mikus@protonmail.ch> Change-Id: I5b2e4c14cc258d821b630d2e54b23a8468820764
Diffstat (limited to 'docs/content/methodology/generic_segmentation_offload.md')
-rw-r--r--docs/content/methodology/generic_segmentation_offload.md117
1 files changed, 117 insertions, 0 deletions
diff --git a/docs/content/methodology/generic_segmentation_offload.md b/docs/content/methodology/generic_segmentation_offload.md
new file mode 100644
index 0000000000..abfab03e16
--- /dev/null
+++ b/docs/content/methodology/generic_segmentation_offload.md
@@ -0,0 +1,117 @@
+---
+bookToc: false
+title: "Generic Segmentation Offload"
+weight: 15
+---
+
+# Generic Segmentation Offload
+
+## 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.
+
+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:
+
+1. iPerfC_GSOvirtio_LinuxVM --- GSOvhost_VPP_GSOvhost --- iPerfS_GSOvirtio_LinuxVM
+
+ - Tests VPP GSO on vhostuser interfaces and interaction with Linux
+ virtio with GSO enabled.
+
+2. 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 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 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