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[csit.git] / docs / cpta / methodology / performance_tests.rst

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-Performance Tests
------------------
-
-Performance trending relies on Maximum Receive Rate (MRR) tests.
-MRR tests measure the packet forwarding rate, in multiple trials of set
-duration, under the maximum load offered by traffic generator
-regardless of packet loss. Maximum load for specified Ethernet frame
-size is set to the bi-directional link rate.
-
-Current parameters for performance trending MRR tests:
-
-- **Ethernet frame sizes**: 64B (78B for IPv6 tests) for all tests, IMIX for
-  selected tests (vhost, memif); all quoted sizes include frame CRC, but
-  exclude per frame transmission overhead of 20B (preamble, inter frame
-  gap).
-- **Maximum load offered**: 10GE and 40GE link (sub-)rates depending on NIC
-  tested, with the actual packet rate depending on frame size,
-  transmission overhead and traffic generator NIC forwarding capacity.
-
-  - For 10GE NICs the maximum packet rate load is 2* 14.88 Mpps for 64B,
-    a 10GE bi-directional link rate.
-  - For 40GE NICs the maximum packet rate load is 2* 18.75 Mpps for 64B,
-    a 40GE bi-directional link sub-rate limited by the packet forwarding
-    capacity of 2-port 40GE NIC model (XL710) used on T-Rex Traffic
-    Generator.
-
-- **Trial duration**: 1 sec.
-- **Number of trials per test**: 10.
-- **Test execution frequency**: twice a day, every 12 hrs (02:00,
-  14:00 UTC).
-
-Note: MRR tests should be reporting bi-directional link rate (or NIC
-rate, if lower) if tested VPP configuration can handle the packet rate
-higher than bi-directional link rate, e.g. large packet tests and/or
-multi-core tests. In other words MRR = min(VPP rate, bi-dir link rate,
-NIC rate).