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diff --git a/docs/report/introduction/test_environment_pre_test_server_calib.rst b/docs/report/introduction/test_environment_pre_test_server_calib.rst new file mode 100644 index 0000000000..325c61b212 --- /dev/null +++ b/docs/report/introduction/test_environment_pre_test_server_calib.rst @@ -0,0 +1,26 @@ +Pre-Test Server Calibration +--------------------------- + +Number of SUT server sub-system runtime parameters have been identified +as impacting data plane performance tests. Calibrating those parameters +is part of FD.io CSIT pre-test activities, and includes measuring and +reporting following: + +#. System level core jitter - measure duration of core interrupts by + Linux in clock cycles and how often interrupts happen. Using + `CPU core jitter tool <https://git.fd.io/pma_tools/tree/jitter>`_. + +#. Memory bandwidth - measure bandwidth with `Intel MLC tool + <https://software.intel.com/en-us/articles/intelr-memory-latency-checker>`_. + +#. Memory latency - measure memory latency with Intel MLC tool. + +#. Cache latency at all levels (L1, L2, and Last Level Cache) - measure + cache latency with Intel MLC tool. + +Measured values of listed parameters are especially important for +repeatable zero packet loss throughput measurements across multiple +system instances. Generally they come useful as a background data for +comparing data plane performance results across disparate servers. + +Following sections include measured calibration data for testbeds. |