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authorYujun Zhang <zhang.yujunz@zte.com.cn>2017-03-30 10:14:04 +0800
committerYujun Zhang <zhang.yujunz@zte.com.cn>2017-03-30 22:21:39 +0800
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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) 2015 Dell Inc.
-.. (c) 2016 ZTE Corp.
-
-
-Compute QPI
-===========
-
-Introduction
-------------
-
-The compute QPI aims to benchmark the compute components of an OPNFV platform.
-Such components include, the CPU performance, the memory performance.
-
-The compute QPI consists of both synthetic and application specific benchmarks to
-test compute components.
-
-All the compute benchmarks could be run in the scenario:
-On Baremetal Machines provisioned by an OPNFV installer (Host machines)
-
-Note: The Compute benchmank constains relatively old benchmarks such as dhrystone
-and whetstone. The suite would be updated for better benchmarks such as Linbench for
-the OPNFV E release.
-
-Getting start with compute QPI
-------------------------------
-
-Notice: All descriptions are based on QTIP container.
-
-Inventory File
-^^^^^^^^^^^^^^
-
-QTIP uses Ansible to trigger benchmark test. Ansible uses an inventory file to
-determine what hosts to work against. QTIP can automatically generate a inventory
-file via OPNFV installer. Users also can write their own inventory infomation into
-``/home/opnfv/qtip/hosts``. This file is just a text file containing a list of host
-IP addresses. For example:
-::
-
- [hosts]
- 10.20.0.11
- 10.20.0.12
-
-QTIP key Pair
-^^^^^^^^^^^^^
-
-QTIP use a SSH key pair to connect to remote hosts. When users execute compute QPI,
-QTIP will generate a key pair named *QtipKey* under ``/home/opnfv/qtip/`` and pass
-public key to remote hosts.
-
-If environment variable *CI_DEBUG* is set to *true*, users should delete it by
-manual. If *CI_DEBUG* is not set or set to *false*, QTIP will delete the key from
-remote hosts before the execution ends. Please make sure the key deleted from remote
-hosts or it can introduce a security flaw.
-
-Commands to run compute QPI
-^^^^^^^^^^^^^^^^^^^^^^^^^^^
-
-In a QTIP container, you can run compute QPI by using QTIP CLI:
-::
-
- mkdir result
- qtip plan run <plan_name> -p $PWD/result
-
-QTIP generates results in the ``$PWD/result`` directory are listed down under the
-timestamp name.
-
-you can get more details from *userguide/cli.rst*.
-
-Benchmarks
-----------
-
-The benchmarks include:
-
-Dhrystone 2.1
-^^^^^^^^^^^^^
-
-Dhrystone is a synthetic benchmark for measuring CPU performance. It uses integer
-calculations to evaluate CPU capabilities. Both Single CPU performance is measured
-along multi-cpu performance.
-
-
-Dhrystone, however, is a dated benchmark and has some short comings.
-Written in C, it is a small program that doesn't test the CPU memory subsystem.
-Additionally, dhrystone results could be modified by optimizing the compiler and
-insome cases hardware configuration.
-
-References: http://www.eembc.org/techlit/datasheets/dhrystone_wp.pdf
-
-Whetstone
-^^^^^^^^^
-
-Whetstone is a synthetic benchmark to measure CPU floating point operation performance.
-Both Single CPU performance is measured along multi-cpu performance.
-
-Like Dhrystone, Whetstone is a dated benchmark and has short comings.
-
-References:
-
-http://www.netlib.org/benchmark/whetstone.c
-
-OpenSSL Speed
-^^^^^^^^^^^^^
-
-OpenSSL Speed can be used to benchmark compute performance of a machine. In QTIP,
-two OpenSSL Speed benchmarks are incorporated:
-
-1. RSA signatunes/sec signed by a machine
-2. AES 128-bit encryption throughput for a machine for cipher block sizes
-
-References:
-
-https://www.openssl.org/docs/manmaster/apps/speed.html
-
-RAMSpeed
-^^^^^^^^
-
-RAMSpeed is used to measure a machine's memory perfomace. The problem(array)size is
-large enough to ensure Cache Misses so that the main machine memory is used.
-
-INTmem and FLOATmem benchmarks are executed in 4 different scenarios:
-
-a. Copy: a(i)=b(i)
-b. Add: a(i)=b(i)+c(i)
-c. Scale: a(i)=b(i)*d
-d. Tniad: a(i)=b(i)+c(i)*d
-
-INTmem uses integers in these four benchmarks whereas FLOATmem uses floating points
-for these benchmarks.
-
-References:
-
-http://alasir.com/software/ramspeed/
-
-https://www.ibm.com/developerworks/community/wikis/home?lang=en#!/wiki/W51a7ffcf4dfd_4b40_9d82_446ebc23c550/page/Untangling+memory+access+measurements
-
-DPI
-^^^
-
-nDPI is a modified variant of OpenDPI, Open source Deep packet Inspection, that
-is maintained by ntop. An example application called *pcapreader* has been developed
-and is available for use along nDPI.
-
-A sample .pcap file is passed to the *pcapreader* application. nDPI classifies traffic
-in the pcap file into different categories based on string matching. The *pcapreader*
-application provides a throughput number for the rate at which traffic was classified,
-indicating a machine's computational performance. The results are run 10 times and an
-average is taken for the obtained number.
-
-*nDPI may provide non consistent results and was added to Brahmaputra for experimental
-purposes*
-
-References:
-
-http://www.ntop.org/products/deep-packet-inspection/ndpi/
-
-http://www.ntop.org/wp-content/uploads/2013/12/nDPI_QuickStartGuide.pdf