.. 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 TC012 ************************************* .. _man-pages: http://manpages.ubuntu.com/manpages/trusty/bw_mem.8.html +-----------------------------------------------------------------------------+ |Memory Bandwidth | | | +--------------+--------------------------------------------------------------+ |test case id | OPNFV_YARDSTICK_TC012_Memory Bandwidth | | | | +--------------+--------------------------------------------------------------+ |metric | Megabyte per second (MBps) | | | | +--------------+--------------------------------------------------------------+ |test purpose | Measure the rate at which data can be read from and written | | | to the memory (this includes all levels of memory). | | | | +--------------+--------------------------------------------------------------+ |configuration | File: opnfv_yardstick_tc012.yaml | | | | | | * SLA (optional): 15000 (MBps) min_bw: The minimum amount of | | | memory bandwidth that is accepted. | | | * Size: 10 240 kB - test allocates twice that size (20 480kB)| | | zeros it and then measures the time it takes to copy from | | | one side to another. | | | * Benchmark: rdwr - measures the time to read data into | | | memory and then write data to the same location. | | | * Warmup: 0 - the number of iterations to perform before | | | taking actual measurements. | | | * 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 bw_mem 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: | | | | | | * memory sizes; | | | * memory operations (such as rd, wr, rdwr, cp, frd, fwr, | | | fcp, bzero, bcopy); | | | * number of warmup iterations; | | | * iterations and intervals. | | | | | | There are default values for each above-mentioned option. | | | | +--------------+--------------------------------------------------------------+ |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 bw_mem tool is | | | invoked and logs are produced and stored. | | | | | | Result: logs are stored. | | | | +--------------+--------------------------------------------------------------+ |test verdict | Test fails if the measured memory bandwidth is below the SLA | | | value or if there is a test case execution problem. | | | | +--------------+--------------------------------------------------------------+ .. Revision: 692f3223c53d43686fa660456a34703f2e0a756c Build date: 2016-09-14