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 - 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 , - 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 logical cores to run VPP worker data plane threads. Depends on HyperThreading and core per test configuration. #. num-rx-queues - 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 - 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.