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author | Tibor Frank <tifrank@cisco.com> | 2019-02-05 10:20:41 +0100 |
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committer | Tibor Frank <tifrank@cisco.com> | 2019-02-05 13:30:25 +0000 |
commit | 124101d22151239b0411a73ae4d2bf8d70970937 (patch) | |
tree | 3910b6e04d4737cbfc3295a25f86e7aaa3050d6a /docs/report/introduction/methodology_vpp_startup_settings.rst | |
parent | a221ffe6144eb0f372521fbbc828b8a225af12cd (diff) |
CSIT-1420: Split methodology section to more files
Change-Id: I861e578434abdf72244d684fca8cfd66e1db9c28
Signed-off-by: Tibor Frank <tifrank@cisco.com>
Diffstat (limited to 'docs/report/introduction/methodology_vpp_startup_settings.rst')
-rw-r--r-- | docs/report/introduction/methodology_vpp_startup_settings.rst | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/docs/report/introduction/methodology_vpp_startup_settings.rst b/docs/report/introduction/methodology_vpp_startup_settings.rst new file mode 100644 index 0000000000..16185b4c05 --- /dev/null +++ b/docs/report/introduction/methodology_vpp_startup_settings.rst @@ -0,0 +1,43 @@ +VPP Startup Settings +-------------------- + +CSIT code manipulates a number of VPP settings in startup.conf for optimized +performance. List of common settings applied to all tests and test +dependent settings follows. + +See `VPP startup.conf`_ +for a complete set and description of listed settings. + +Common Settings +~~~~~~~~~~~~~~~ + +List of vpp startup.conf settings applied to all tests: + +#. heap-size <value> - set separately for ip4, ip6, stats, main + depending on scale tested. +#. no-tx-checksum-offload - disables UDP / TCP TX checksum offload in DPDK. + Typically needed for use faster vector PMDs (together with + no-multi-seg). +#. socket-mem <value>,<value> - memory per numa. (Not required anymore + due to VPP code changes, should be removed in CSIT-18.10.) + +Per Test Settings +~~~~~~~~~~~~~~~~~ + +List of vpp startup.conf settings applied dynamically per test: + +#. corelist-workers <list_of_cores> - list of logical cores to run VPP + worker data plane threads. Depends on HyperThreading and core per + test configuration. +#. num-rx-queues <value> - depends on a number of VPP threads and NIC + interfaces. +#. num-rx-desc/num-tx-desc - number of rx/tx descriptors for specific + NICs, incl. xl710, x710, xxv710. +#. num-mbufs <value> - increases number of buffers allocated, needed + only in scenarios with large number of interfaces and worker threads. + Value is per CPU socket. Default is 16384. +#. no-multi-seg - disables multi-segment buffers in DPDK, improves + packet throughput, but disables Jumbo MTU support. Disabled for all + tests apart from the ones that require Jumbo 9000B frame support. +#. UIO driver - depends on topology file definition. +#. QAT VFs - depends on NRThreads, each thread = 1QAT VFs. |