-
*************************************
Yardstick Test Case Description TC010
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+
+.. _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 |
| | |
| | * Iterations: 10 - test is run 10 times iteratively. |
| | * Interval: 1 - there is 1 second delay between each |
| | iteration. |
+| | |
+--------------+--------------------------------------------------------------+
|test tool | Lmbench |
| | |
| | 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 |
-| | (See :ref:`guest-image` for how to generate a Linux image |
-| | for Glance with Lmbench included). |
+| | |
+--------------+--------------------------------------------------------------+
-|references |* http://manpages.ubuntu.com/manpages/trusty/lat_mem_rd.8.html|
+|references | man-pages_ |
+| | |
+| | McVoy, Larry W.,and Carl Staelin. "lmbench: Portable Tools |
+| | for Performance Analysis." USENIX annual technical |
+| | conference 1996. |
| | |
-| |* 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; |
+|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. |
+| | 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 | step | description | result |
-| +------+----------------------------------+--------------------+
-| | 1 | The host is installed as client. | Logs are stored |
-| | | Lmbench's lat_mem_rd tool is | |
-| | | invoked and logs are produced and| |
-| | | stored. | |
-+--------------+------+----------------------------------+--------------------+
+| | |
++--------------+--------------------------------------------------------------+
+|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. |
+| | |
+--------------+--------------------------------------------------------------+
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