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diff --git a/docs/userguide/opnfv_yardstick_tc010.rst b/docs/userguide/opnfv_yardstick_tc010.rst new file mode 100644 index 000000000..ab793de76 --- /dev/null +++ b/docs/userguide/opnfv_yardstick_tc010.rst @@ -0,0 +1,82 @@ +.. This work is licensed under a Creative Commons Attribution 4.0 International +.. License. +.. http://creativecommons.org/licenses/by/4.0 +.. (c) OPNFV, Ericsson AB and others. + +************************************* +Yardstick Test Case Description TC010 +************************************* + +.. _man-pages: http://manpages.ubuntu.com/manpages/trusty/lat_mem_rd.8.html + ++-----------------------------------------------------------------------------+ +|Memory Latency | +| | ++--------------+--------------------------------------------------------------+ +|test case id | OPNFV_YARDSTICK_TC010_Memory Latency | +| | | ++--------------+--------------------------------------------------------------+ +|metric | Latency in nanoseconds | +| | | ++--------------+--------------------------------------------------------------+ +|test purpose | Measure the memory read latency for varying memory sizes and | +| | strides. Whole memory hierarchy is measured including all | +| | levels of cache. | +| | | ++--------------+--------------------------------------------------------------+ +|configuration | File: opnfv_yardstick_tc010.yaml | +| | | +| | * SLA (max_latency): 30 nanoseconds | +| | * Stride - 128 bytes | +| | * Stop size - 64 megabytes | +| | * Iterations: 10 - test is run 10 times iteratively. | +| | * Interval: 1 - there is 1 second delay between each | +| | iteration. | +| | | ++--------------+--------------------------------------------------------------+ +|test tool | Lmbench | +| | | +| | Lmbench is a suite of operating system microbenchmarks. This | +| | test uses lat_mem_rd tool from that suite. | +| | Lmbench is not always part of a Linux distribution, hence it | +| | needs to be installed in the test image | +| | | ++--------------+--------------------------------------------------------------+ +|references | man-pages_ | +| | | +| | McVoy, Larry W.,and Carl Staelin. "lmbench: Portable Tools | +| | for Performance Analysis." USENIX annual technical | +| | conference 1996. | +| | | ++--------------+--------------------------------------------------------------+ +|applicability | Test can be configured with different: | +| | | +| | * strides; | +| | * stop_size; | +| | * iterations and intervals. | +| | | +| | There are default values for each above-mentioned option. | +| | | +| | SLA (optional) : max_latency: The maximum memory latency | +| | that is accepted. | +| | | ++--------------+--------------------------------------------------------------+ +|pre-test | The test case image needs to be installed into Glance | +|conditions | with Lmbench included in the image. | +| | | +| | No POD specific requirements have been identified. | +| | | ++--------------+--------------------------------------------------------------+ +|test sequence | description and expected result | +| | | ++--------------+--------------------------------------------------------------+ +|step 1 | The host is installed as client. Lmbench's lat_mem_rd tool | +| | is invoked and logs are produced and stored. | +| | | +| | Result: logs are stored. | +| | | ++--------------+--------------------------------------------------------------+ +|test verdict | Test fails if the measured memory latency is above the SLA | +| | value or if there is a test case execution problem. | +| | | ++--------------+--------------------------------------------------------------+ |