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-.. This work is licensed under a Creative Commons Attribution 4.0 International
-.. License.
-.. http://creativecommons.org/licenses/by/4.0
-.. (c) OPNFV, Huawei Technologies Co.,Ltd and others.
-
-*************************************
-Yardstick Test Case Description TC004
-*************************************
-
-.. _cachestat: https://github.com/brendangregg/perf-tools/tree/master/fs
-
-+-----------------------------------------------------------------------------+
-|Cache Utilization |
-| |
-+--------------+--------------------------------------------------------------+
-|test case id | OPNFV_YARDSTICK_TC004_CACHE Utilization |
-| | |
-+--------------+--------------------------------------------------------------+
-|metric | cache hit, cache miss, hit/miss ratio, buffer size and page |
-| | cache size |
-| | |
-+--------------+--------------------------------------------------------------+
-|test purpose | The purpose of TC004 is to evaluate the IaaS compute |
-| | capability with regards to cache utilization.This test case |
-| | should be run in parallel with other Yardstick test cases |
-| | and not run as a stand-alone test case. |
-| | |
-| | This test case measures cache usage statistics, including |
-| | cache hit, cache miss, hit ratio, buffer cache size and page |
-| | cache size, with some wokloads runing on the infrastructure. |
-| | Both average and maximun values are collected. |
-| | |
-| | The purpose is also to be able to spot the trends. |
-| | Test results, graphs and similar shall be stored for |
-| | comparison reasons and product evolution understanding |
-| | between different OPNFV versions and/or configurations. |
-| | |
-+--------------+--------------------------------------------------------------+
-|test tool | cachestat |
-| | |
-| | cachestat is a tool using Linux ftrace capabilities for |
-| | showing Linux page cache hit/miss statistics. |
-| | |
-| | (cachestat is not always part of a Linux distribution, hence |
-| | it needs to be installed. As an example see the |
-| | /yardstick/tools/ directory for how to generate a Linux |
-| | image with cachestat included.) |
-| | |
-+--------------+--------------------------------------------------------------+
-|test | cachestat test is invoked in a host VM on a compute blade, |
-|description | cachestat test requires some other test cases running in the |
-| | host to stimulate workload. |
-| | |
-+--------------+--------------------------------------------------------------+
-|configuration | File: cachestat.yaml (in the 'samples' directory) |
-| | |
-| | Interval is set 1. Test repeat, pausing every 1 seconds |
-| | in-between. |
-| | Test durarion is set to 60 seconds. |
-| | |
-| | SLA is not available in this test case. |
-| | |
-+--------------+--------------------------------------------------------------+
-|applicability | Test can be configured with different: |
-| | |
-| | * interval; |
-| | * runner Duration. |
-| | |
-| | Default values exist. |
-| | |
-+--------------+--------------------------------------------------------------+
-|usability | This test case is one of Yardstick's generic test. Thus it |
-| | is runnable on most of the scenarios. |
-| | |
-+--------------+--------------------------------------------------------------+
-|references | cachestat_ |
-| | |
-| | ETSI-NFV-TST001 |
-| | |
-+--------------+--------------------------------------------------------------+
-|pre-test | The test case image needs to be installed into Glance |
-|conditions | with cachestat included in the image. |
-| | |
-| | No POD specific requirements have been identified. |
-| | |
-+--------------+--------------------------------------------------------------+
-|test sequence | description and expected result |
-| | |
-+--------------+--------------------------------------------------------------+
-|step 1 | A host VM with cachestat installed is booted. |
-| | |
-+--------------+--------------------------------------------------------------+
-|step 2 | Yardstick is connected with the host VM by using ssh. |
-| | 'cache_stat' bash script is copyied from Jump Host to |
-| | the server VM via the ssh tunnel. |
-| | |
-+--------------+--------------------------------------------------------------+
-|step 3 | 'cache_stat' script is invoked. Raw cache usage statistics |
-| | are collected and filtrated. Average and maximum values are |
-| | calculated and recorded. Logs are produced and stored. |
-| | |
-| | Result: Logs are stored. |
-| | |
-+--------------+--------------------------------------------------------------+
-|step 4 | The host VM is deleted. |
-| | |
-+--------------+--------------------------------------------------------------+
-|test verdict | None. Cache utilization results are collected and stored. |
-| | |
-+--------------+--------------------------------------------------------------+