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authorTrevor Cooper <trevor.cooper@intel.com>2017-03-21 13:25:49 -0700
committerTrevor Cooper <trevor.cooper@intel.com>2017-03-21 13:25:49 -0700
commit32a5263216d79ad34041dca55357278f092bb931 (patch)
treee3bf10ba8190ad93d2b114c1903cc43e2dfbf6b6 /docs/design/vswitchperf_design.rst
parent59668b1aa68da507335ef351619d9f50019df762 (diff)
Moved doc files to testing document structure testing/user ... testing/developer and modified doc index to match dir structure
Change-Id: I4b1a535808a48773505fa7874c61707cd349fced Signed-off-by: Trevor Cooper <trevor.cooper@intel.com>
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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, Intel Corporation, AT&T and others.
-
-.. _vsperf-design:
-
-======================
-VSPERF Design Document
-======================
-
-Intended Audience
-=================
-
-This document is intended to aid those who want to modify the vsperf code. Or
-to extend it - for example to add support for new traffic generators,
-deployment scenarios and so on.
-
-Usage
-=====
-
-Example Connectivity to DUT
----------------------------
-
-Establish connectivity to the VSPERF DUT Linux host, such as the DUT in Pod 3,
-by following the steps in `Testbed POD3
-<https://wiki.opnfv.org/get_started/pod_3_-_characterize_vswitch_performance>`__
-
-The steps cover booking the DUT and establishing the VSPERF environment.
-
-Example Command Lines
----------------------
-
-List all the cli options:
-
-.. code-block:: console
-
- $ ./vsperf -h
-
-Run all tests that have ``tput`` in their name - ``phy2phy_tput``, ``pvp_tput`` etc.:
-
-.. code-block:: console
-
- $ ./vsperf --tests 'tput'
-
-As above but override default configuration with settings in '10_custom.conf'.
-This is useful as modifying configuration directly in the configuration files
-in ``conf/NN_*.py`` shows up as changes under git source control:
-
-.. code-block:: console
-
- $ ./vsperf --conf-file=<path_to_custom_conf>/10_custom.conf --tests 'tput'
-
-Override specific test parameters. Useful for shortening the duration of tests
-for development purposes:
-
-.. code-block:: console
-
- $ ./vsperf --test-params 'TRAFFICGEN_DURATION=10;TRAFFICGEN_RFC2544_TESTS=1;' \
- 'TRAFFICGEN_PKT_SIZES=(64,)' pvp_tput
-
-Typical Test Sequence
-=====================
-
-This is a typical flow of control for a test.
-
-.. image:: vsperf.png
-
-.. _design-configuration:
-
-Configuration
-=============
-
-The conf package contains the configuration files (``*.conf``) for all system
-components, it also provides a ``settings`` object that exposes all of these
-settings.
-
-Settings are not passed from component to component. Rather they are available
-globally to all components once they import the conf package.
-
-.. code-block:: python
-
- from conf import settings
- ...
- log_file = settings.getValue('LOG_FILE_DEFAULT')
-
-Settings files (``*.conf``) are valid python code so can be set to complex
-types such as lists and dictionaries as well as scalar types:
-
-.. code-block:: python
-
- first_packet_size = settings.getValue('PACKET_SIZE_LIST')[0]
-
-Configuration Procedure and Precedence
---------------------------------------
-
-Configuration files follow a strict naming convention that allows them to be
-processed in a specific order. All the .conf files are named ``NN_name.conf``,
-where NN is a decimal number. The files are processed in order from 00_name.conf
-to 99_name.conf so that if the name setting is given in both a lower and higher
-numbered conf file then the higher numbered file is the effective setting as it
-is processed after the setting in the lower numbered file.
-
-The values in the file specified by ``--conf-file`` takes precedence over all
-the other configuration files and does not have to follow the naming
-convention.
-
-.. _paths-documentation:
-
-Configuration of PATHS dictionary
----------------------------------
-
-VSPERF uses external tools like Open vSwitch and Qemu for execution of testcases. These
-tools may be downloaded and built automatically (see :ref:`vsperf-installation-script`)
-or installed manually by user from binary packages. It is also possible to use a combination
-of both approaches, but it is essential to correctly set paths to all required tools.
-These paths are stored within a PATHS dictionary, which is evaluated before execution
-of each testcase, in order to setup testcase specific environment. Values selected for testcase
-execution are internally stored inside TOOLS dictionary, which is used by VSPERF to execute
-external tools, load kernel modules, etc.
-
-The default configuration of PATHS dictionary is spread among three different configuration files
-to follow logical grouping of configuration options. Basic description of PATHS dictionary
-is placed inside ``conf/00_common.conf``. The configuration specific to DPDK and vswitches
-is located at ``conf/02_vswitch.conf``. The last part related to the Qemu is defined inside
-``conf/04_vnf.conf``. Default configuration values can be used in case, that all required
-tools were downloaded and built automatically by vsperf itself. In case, that some of
-tools were installed manually from binary packages, then it will be necessary to modify
-the content of PATHS dictionary accordingly.
-
-Dictionary has a specific section of configuration options for every tool type, it means:
-
- * ``PATHS['vswitch']`` - contains a separete dictionary for each of vswitches supported by VSPEF
-
- Example:
-
- .. code-block:: python
-
- PATHS['vswitch'] = {
- 'OvsDpdkVhost': { ... },
- 'OvsVanilla' : { ... },
- ...
- }
-
- * ``PATHS['dpdk']`` - contains paths to the dpdk sources, kernel modules and tools (e.g. testpmd)
-
- Example:
-
- .. code-block:: python
-
- PATHS['dpdk'] = {
- 'type' : 'src',
- 'src': {
- 'path': os.path.join(ROOT_DIR, 'src/dpdk/dpdk/'),
- 'modules' : ['uio', os.path.join(RTE_TARGET, 'kmod/igb_uio.ko')],
- 'bind-tool': 'tools/dpdk*bind.py',
- 'testpmd': os.path.join(RTE_TARGET, 'app', 'testpmd'),
- },
- ...
- }
-
- * ``PATHS['qemu']`` - contains paths to the qemu sources and executable file
-
- Example:
-
- .. code-block:: python
-
- PATHS['qemu'] = {
- 'type' : 'bin',
- 'bin': {
- 'qemu-system': 'qemu-system-x86_64'
- },
- ...
- }
-
-Every section specific to the particular vswitch, dpdk or qemu may contain following types
-of configuration options:
-
- * option ``type`` - is a string, which defines the type of configured paths ('src' or 'bin')
- to be selected for a given section:
-
- * value ``src`` means, that VSPERF will use vswitch, DPDK or QEMU built from sources
- e.g. by execution of ``systems/build_base_machine.sh`` script during VSPERF
- installation
-
- * value ``bin`` means, that VSPERF will use vswitch, DPDK or QEMU binaries installed
- directly in the operating system, e.g. via OS specific packaging system
-
- * option ``path`` - is a string with a valid system path; Its content is checked for
- existence, prefixed with section name and stored into TOOLS for later use
- e.g. ``TOOLS['dpdk_src']`` or ``TOOLS['vswitch_src']``
-
- * option ``modules`` - is list of strings with names of kernel modules; Every module name
- from given list is checked for a '.ko' suffix. In case that it matches and if it is not
- an absolute path to the module, then module name is prefixed with value of ``path``
- option defined for the same section
-
- Example:
-
- .. code-block:: python
-
- """
- snippet of PATHS definition from the configuration file:
- """
- PATHS['vswitch'] = {
- 'OvsVanilla' = {
- 'type' : 'src',
- 'src': {
- 'path': '/tmp/vsperf/src_vanilla/ovs/ovs/',
- 'modules' : ['datapath/linux/openvswitch.ko'],
- ...
- },
- ...
- }
- ...
- }
-
- """
- Final content of TOOLS dictionary used during runtime:
- """
- TOOLS['vswitch_modules'] = ['/tmp/vsperf/src_vanilla/ovs/ovs/datapath/linux/openvswitch.ko']
-
- * all other options are strings with names and paths to specific tools; If a given string
- contains a relative path and option ``path`` is defined for a given section, then string
- content will be prefixed with content of the ``path``. Otherwise the name of the tool will be
- searched within standard system directories. In case that filename contains OS specific
- wildcards, then they will be expanded to the real path. At the end of the processing, every
- absolute path will be checked for its existence. In case that temporary path (i.e. path with
- a ``_tmp`` suffix) does not exist, then log will be written and vsperf will continue. If any
- other path will not exist, then vsperf execution will be terminated with a runtime error.
-
- Example:
-
- .. code-block:: python
-
- """
- snippet of PATHS definition from the configuration file:
- """
- PATHS['vswitch'] = {
- 'OvsDpdkVhost': {
- 'type' : 'src',
- 'src': {
- 'path': '/tmp/vsperf/src_vanilla/ovs/ovs/',
- 'ovs-vswitchd': 'vswitchd/ovs-vswitchd',
- 'ovsdb-server': 'ovsdb/ovsdb-server',
- ...
- }
- ...
- }
- ...
- }
-
- """
- Final content of TOOLS dictionary used during runtime:
- """
- TOOLS['ovs-vswitchd'] = '/tmp/vsperf/src_vanilla/ovs/ovs/vswitchd/ovs-vswitchd'
- TOOLS['ovsdb-server'] = '/tmp/vsperf/src_vanilla/ovs/ovs/ovsdb/ovsdb-server'
-
-Note: In case that ``bin`` type is set for DPDK, then ``TOOLS['dpdk_src']`` will be set to
-the value of ``PATHS['dpdk']['src']['path']``. The reason is, that VSPERF uses downloaded
-DPDK sources to copy DPDK and testpmd into the GUEST, where testpmd is built. In case,
-that DPDK sources are not available, then vsperf will continue with test execution,
-but testpmd can't be used as a guest loopback. This is useful in case, that other guest
-loopback applications (e.g. buildin or l2fwd) are used.
-
-Note: In case of RHEL 7.3 OS usage, binary package configuration is required
-for Vanilla OVS tests. With the installation of a supported rpm for OVS there is
-a section in the ``conf\10_custom.conf`` file that can be used.
-
-.. _configuration-of-traffic-dictionary:
-
-Configuration of TRAFFIC dictionary
------------------------------------
-
-TRAFFIC dictionary is used for configuration of traffic generator. Default values
-can be found in configuration file ``conf/03_traffic.conf``. These default values
-can be modified by (first option has the highest priorty):
-
- 1. ``Parameters`` section of testcase defintion
- 2. command line options specified by ``--test-params`` argument
- 3. custom configuration file
-
-It is to note, that in case of option 1 and 2, it is possible to specify only
-values, which should be changed. In case of custom configuration file, it is
-required to specify whole ``TRAFFIC`` dictionary with its all values or explicitly
-call and update() method of ``TRAFFIC`` dictionary.
-
-Detailed description of ``TRAFFIC`` dictionary items follows:
-
-.. code-block:: console
-
- 'traffic_type' - One of the supported traffic types.
- E.g. rfc2544_throughput, rfc2544_back2back
- or rfc2544_continuous
- Data type: str
- Default value: "rfc2544_throughput".
- 'bidir' - Specifies if generated traffic will be full-duplex (True)
- or half-duplex (False)
- Data type: str
- Supported values: "True", "False"
- Default value: "False".
- 'frame_rate' - Defines desired percentage of frame rate used during
- continuous stream tests.
- Data type: int
- Default value: 100.
- 'multistream' - Defines number of flows simulated by traffic generator.
- Value 0 disables multistream feature
- Data type: int
- Supported values: 0-65535
- Default value: 0.
- 'stream_type' - Stream type is an extension of the "multistream" feature.
- If multistream is disabled, then stream type will be
- ignored. Stream type defines ISO OSI network layer used
- for simulation of multiple streams.
- Data type: str
- Supported values:
- "L2" - iteration of destination MAC address
- "L3" - iteration of destination IP address
- "L4" - iteration of destination port
- of selected transport protocol
- Default value: "L4".
- 'pre_installed_flows'
- - Pre-installed flows is an extension of the "multistream"
- feature. If enabled, it will implicitly insert a flow
- for each stream. If multistream is disabled, then
- pre-installed flows will be ignored.
- Note: It is supported only for p2p deployment scenario.
- Data type: str
- Supported values:
- "Yes" - flows will be inserted into OVS
- "No" - flows won't be inserted into OVS
- Default value: "No".
- 'flow_type' - Defines flows complexity.
- Data type: str
- Supported values:
- "port" - flow is defined by ingress ports
- "IP" - flow is defined by ingress ports
- and src and dst IP addresses
- Default value: "port"
- 'l2' - A dictionary with l2 network layer details. Supported
- values are:
- 'srcmac' - Specifies source MAC address filled by traffic generator.
- NOTE: It can be modified by vsperf in some scenarios.
- Data type: str
- Default value: "00:00:00:00:00:00".
- 'dstmac' - Specifies destination MAC address filled by traffic generator.
- NOTE: It can be modified by vsperf in some scenarios.
- Data type: str
- Default value: "00:00:00:00:00:00".
- 'framesize' - Specifies default frame size. This value should not be
- changed directly. It will be overridden during testcase
- execution by values specified by list TRAFFICGEN_PKT_SIZES.
- Data type: int
- Default value: 64
- 'l3' - A dictionary with l3 network layer details. Supported
- values are:
- 'srcip' - Specifies source MAC address filled by traffic generator.
- NOTE: It can be modified by vsperf in some scenarios.
- Data type: str
- Default value: "1.1.1.1".
- 'dstip' - Specifies destination MAC address filled by traffic generator.
- NOTE: It can be modified by vsperf in some scenarios.
- Data type: str
- Default value: "90.90.90.90".
- 'proto' - Specifies deflaut protocol type.
- Please check particular traffic generator implementation
- for supported protocol types.
- Data type: str
- Default value: "udp".
- 'l4' - A dictionary with l4 network layer details. Supported
- values are:
- 'srcport' - Specifies source port of selected transport protocol.
- NOTE: It can be modified by vsperf in some scenarios.
- Data type: int
- Default value: 3000
- 'dstport' - Specifies destination port of selected transport protocol.
- NOTE: It can be modified by vsperf in some scenarios.
- Data type: int
- Default value: 3001
- 'vlan' - A dictionary with vlan encapsulation details. Supported
- values are:
- 'enabled' - Specifies if vlan encapsulation should be enabled or
- disabled.
- Data type: bool
- Default value: False
- 'id' - Specifies vlan id.
- Data type: int (NOTE: must fit to 12 bits)
- Default value: 0
- 'priority' - Specifies a vlan priority (PCP header field).
- Data type: int (NOTE: must fit to 3 bits)
- Default value: 0
- 'cfi' - Specifies if frames can or cannot be dropped during
- congestion (DEI header field).
- Data type: int (NOTE: must fit to 1 bit)
- Default value: 0
-
-.. _configuration-of-guest-options:
-
-Configuration of GUEST options
-------------------------------
-
-VSPERF is able to setup scenarios involving a number of VMs in series or in parallel.
-All configuration options related to a particular VM instance are defined as
-lists and prefixed with ``GUEST_`` label. It is essential, that there is enough
-items in all ``GUEST_`` options to cover all VM instances involved in the test.
-In case there is not enough items, then VSPERF will use the first item of
-particular ``GUEST_`` option to expand the list to required length.
-
-Example of option expansion for 4 VMs:
-
- .. code-block:: python
-
- """
- Original values:
- """
- GUEST_SMP = ['2']
- GUEST_MEMORY = ['2048', '4096']
-
- """
- Values after automatic expansion:
- """
- GUEST_SMP = ['2', '2', '2', '2']
- GUEST_MEMORY = ['2048', '4096', '2048', '2048']
-
-
-First option can contain macros starting with ``#`` to generate VM specific values.
-These macros can be used only for options of ``list`` or ``str`` types with ``GUEST_``
-prefix.
-
-Example of macros and their expnasion for 2 VMs:
-
- .. code-block:: python
-
- """
- Original values:
- """
- GUEST_SHARE_DIR = ['/tmp/qemu#VMINDEX_share']
- GUEST_BRIDGE_IP = ['#IP(1.1.1.5)/16']
-
- """
- Values after automatic expansion:
- """
- GUEST_SHARE_DIR = ['/tmp/qemu0_share', '/tmp/qemu1_share']
- GUEST_BRIDGE_IP = ['1.1.1.5/16', '1.1.1.6/16']
-
-Additional examples are available at ``04_vnf.conf``.
-
-Note: In case, that macro is detected in the first item of the list, then
-all other items are ignored and list content is created automatically.
-
-Multiple macros can be used inside one configuration option definition, but macros
-cannot be used inside other macros. The only exception is macro ``#VMINDEX``, which
-is expanded first and thus it can be used inside other macros.
-
-Following macros are supported:
-
- * ``#VMINDEX`` - it is replaced by index of VM being executed; This macro
- is expanded first, so it can be used inside other macros.
-
- Example:
-
- .. code-block:: python
-
- GUEST_SHARE_DIR = ['/tmp/qemu#VMINDEX_share']
-
- * ``#MAC(mac_address[, step])`` - it will iterate given ``mac_address``
- with optional ``step``. In case that step is not defined, then it is set to 1.
- It means, that first VM will use the value of ``mac_address``, second VM
- value of ``mac_address`` increased by ``step``, etc.
-
- Example:
-
- .. code-block:: python
-
- GUEST_NICS = [[{'mac' : '#MAC(00:00:00:00:00:01,2)'}]]
-
- * ``#IP(ip_address[, step])`` - it will iterate given ``ip_address``
- with optional ``step``. In case that step is not defined, then it is set to 1.
- It means, that first VM will use the value of ``ip_address``, second VM
- value of ``ip_address`` increased by ``step``, etc.
-
- Example:
-
- .. code-block:: python
-
- GUEST_BRIDGE_IP = ['#IP(1.1.1.5)/16']
-
- * ``#EVAL(expression)`` - it will evaluate given ``expression`` as python code;
- Only simple expressions should be used. Call of the functions is not supported.
-
- Example:
-
- .. code-block:: python
-
- GUEST_CORE_BINDING = [('#EVAL(6+2*#VMINDEX)', '#EVAL(7+2*#VMINDEX)')]
-
-Other Configuration
--------------------
-
-``conf.settings`` also loads configuration from the command line and from the environment.
-
-.. _pxp-deployment:
-
-PXP Deployment
-==============
-
-Every testcase uses one of the supported deployment scenarios to setup test environment.
-The controller responsible for a given scenario configures flows in the vswitch to route
-traffic among physical interfaces connected to the traffic generator and virtual
-machines. VSPERF supports several deployments including PXP deployment, which can
-setup various scenarios with multiple VMs.
-
-These scenarios are realized by VswitchControllerPXP class, which can configure and
-execute given number of VMs in serial or parallel configurations. Every VM can be
-configured with just one or an even number of interfaces. In case that VM has more than
-2 interfaces, then traffic is properly routed among pairs of interfaces.
-
-Example of traffic routing for VM with 4 NICs in serial configuration:
-
-.. code-block:: console
-
- +------------------------------------------+
- | VM with 4 NICs |
- | +---------------+ +---------------+ |
- | | Application | | Application | |
- | +---------------+ +---------------+ |
- | ^ | ^ | |
- | | v | v |
- | +---------------+ +---------------+ |
- | | logical ports | | logical ports | |
- | | 0 1 | | 2 3 | |
- +--+---------------+----+---------------+--+
- ^ : ^ :
- | | | |
- : v : v
- +-----------+---------------+----+---------------+----------+
- | vSwitch | 0 1 | | 2 3 | |
- | | logical ports | | logical ports | |
- | previous +---------------+ +---------------+ next |
- | VM or PHY ^ | ^ | VM or PHY|
- | port -----+ +------------+ +---> port |
- +-----------------------------------------------------------+
-
-It is also possible to define different number of interfaces for each VM to better
-simulate real scenarios.
-
-Example of traffic routing for 2 VMs in serial configuration, where 1st VM has
-4 NICs and 2nd VM 2 NICs:
-
-.. code-block:: console
-
- +------------------------------------------+ +---------------------+
- | 1st VM with 4 NICs | | 2nd VM with 2 NICs |
- | +---------------+ +---------------+ | | +---------------+ |
- | | Application | | Application | | | | Application | |
- | +---------------+ +---------------+ | | +---------------+ |
- | ^ | ^ | | | ^ | |
- | | v | v | | | v |
- | +---------------+ +---------------+ | | +---------------+ |
- | | logical ports | | logical ports | | | | logical ports | |
- | | 0 1 | | 2 3 | | | | 0 1 | |
- +--+---------------+----+---------------+--+ +--+---------------+--+
- ^ : ^ : ^ :
- | | | | | |
- : v : v : v
- +-----------+---------------+----+---------------+-------+---------------+----------+
- | vSwitch | 0 1 | | 2 3 | | 4 5 | |
- | | logical ports | | logical ports | | logical ports | |
- | previous +---------------+ +---------------+ +---------------+ next |
- | VM or PHY ^ | ^ | ^ | VM or PHY|
- | port -----+ +------------+ +---------------+ +----> port |
- +-----------------------------------------------------------------------------------+
-
-The number of VMs involved in the test and the type of their connection is defined
-by deployment name as follows:
-
- * ``pvvp[number]`` - configures scenario with VMs connected in series with
- optional ``number`` of VMs. In case that ``number`` is not specified, then
- 2 VMs will be used.
-
- Example of 2 VMs in a serial configuration:
-
- .. code-block:: console
-
- +----------------------+ +----------------------+
- | 1st VM | | 2nd VM |
- | +---------------+ | | +---------------+ |
- | | Application | | | | Application | |
- | +---------------+ | | +---------------+ |
- | ^ | | | ^ | |
- | | v | | | v |
- | +---------------+ | | +---------------+ |
- | | logical ports | | | | logical ports | |
- | | 0 1 | | | | 0 1 | |
- +---+---------------+--+ +---+---------------+--+
- ^ : ^ :
- | | | |
- : v : v
- +---+---------------+---------+---------------+--+
- | | 0 1 | | 3 4 | |
- | | logical ports | vSwitch | logical ports | |
- | +---------------+ +---------------+ |
- | ^ | ^ | |
- | | +-----------------+ v |
- | +----------------------------------------+ |
- | | physical ports | |
- | | 0 1 | |
- +---+----------------------------------------+---+
- ^ :
- | |
- : v
- +------------------------------------------------+
- | |
- | traffic generator |
- | |
- +------------------------------------------------+
-
- * ``pvpv[number]`` - configures scenario with VMs connected in parallel with
- optional ``number`` of VMs. In case that ``number`` is not specified, then
- 2 VMs will be used. Multistream feature is used to route traffic to particular
- VMs (or NIC pairs of every VM). It means, that VSPERF will enable multistream
- feaure and sets the number of streams to the number of VMs and their NIC
- pairs. Traffic will be dispatched based on Stream Type, i.e. by UDP port,
- IP address or MAC address.
-
- Example of 2 VMs in a parallel configuration, where traffic is dispatched
- based on the UDP port.
-
- .. code-block:: console
-
- +----------------------+ +----------------------+
- | 1st VM | | 2nd VM |
- | +---------------+ | | +---------------+ |
- | | Application | | | | Application | |
- | +---------------+ | | +---------------+ |
- | ^ | | | ^ | |
- | | v | | | v |
- | +---------------+ | | +---------------+ |
- | | logical ports | | | | logical ports | |
- | | 0 1 | | | | 0 1 | |
- +---+---------------+--+ +---+---------------+--+
- ^ : ^ :
- | | | |
- : v : v
- +---+---------------+---------+---------------+--+
- | | 0 1 | | 3 4 | |
- | | logical ports | vSwitch | logical ports | |
- | +---------------+ +---------------+ |
- | ^ | ^ : |
- | | ......................: : |
- | UDP | UDP : | : |
- | port| port: +--------------------+ : |
- | 0 | 1 : | : |
- | | : v v |
- | +----------------------------------------+ |
- | | physical ports | |
- | | 0 1 | |
- +---+----------------------------------------+---+
- ^ :
- | |
- : v
- +------------------------------------------------+
- | |
- | traffic generator |
- | |
- +------------------------------------------------+
-
-
-PXP deployment is backward compatible with PVP deployment, where ``pvp`` is
-an alias for ``pvvp1`` and it executes just one VM.
-
-The number of interfaces used by VMs is defined by configuration option
-``GUEST_NICS_NR``. In case that more than one pair of interfaces is defined
-for VM, then:
-
- * for ``pvvp`` (serial) scenario every NIC pair is connected in serial
- before connection to next VM is created
- * for ``pvpv`` (parallel) scenario every NIC pair is directly connected
- to the physical ports and unique traffic stream is assigned to it
-
-Examples:
-
- * Deployment ``pvvp10`` will start 10 VMs and connects them in series
- * Deployment ``pvpv4`` will start 4 VMs and connects them in parallel
- * Deployment ``pvpv1`` and GUEST_NICS_NR = [4] will start 1 VM with
- 4 interfaces and every NIC pair is directly connected to the
- physical ports
- * Deployment ``pvvp`` and GUEST_NICS_NR = [2, 4] will start 2 VMs;
- 1st VM will have 2 interfaces and 2nd VM 4 interfaces. These interfaces
- will be connected in serial, i.e. traffic will flow as follows:
- PHY1 -> VM1_1 -> VM1_2 -> VM2_1 -> VM2_2 -> VM2_3 -> VM2_4 -> PHY2
-
-Note: In case that only 1 or more than 2 NICs are configured for VM,
-then ``testpmd`` should be used as forwarding application inside the VM.
-As it is able to forward traffic between multiple VM NIC pairs.
-
-Note: In case of ``linux_bridge``, all NICs are connected to the same
-bridge inside the VM.
-
-VM, vSwitch, Traffic Generator Independence
-===========================================
-
-VSPERF supports different vSwithes, Traffic Generators, VNFs
-and Forwarding Applications by using standard object-oriented polymorphism:
-
- * Support for vSwitches is implemented by a class inheriting from IVSwitch.
- * Support for Traffic Generators is implemented by a class inheriting from
- ITrafficGenerator.
- * Support for VNF is implemented by a class inheriting from IVNF.
- * Support for Forwarding Applications is implemented by a class inheriting
- from IPktFwd.
-
-By dealing only with the abstract interfaces the core framework can support
-many implementations of different vSwitches, Traffic Generators, VNFs
-and Forwarding Applications.
-
-IVSwitch
---------
-
-.. code-block:: python
-
- class IVSwitch:
- start(self)
- stop(self)
- add_switch(switch_name)
- del_switch(switch_name)
- add_phy_port(switch_name)
- add_vport(switch_name)
- get_ports(switch_name)
- del_port(switch_name, port_name)
- add_flow(switch_name, flow)
- del_flow(switch_name, flow=None)
-
-ITrafficGenerator
------------------
-
-.. code-block:: python
-
- class ITrafficGenerator:
- connect()
- disconnect()
-
- send_burst_traffic(traffic, numpkts, time, framerate)
-
- send_cont_traffic(traffic, time, framerate)
- start_cont_traffic(traffic, time, framerate)
- stop_cont_traffic(self):
-
- send_rfc2544_throughput(traffic, tests, duration, lossrate)
- start_rfc2544_throughput(traffic, tests, duration, lossrate)
- wait_rfc2544_throughput(self)
-
- send_rfc2544_back2back(traffic, tests, duration, lossrate)
- start_rfc2544_back2back(traffic, , tests, duration, lossrate)
- wait_rfc2544_back2back()
-
-Note ``send_xxx()`` blocks whereas ``start_xxx()`` does not and must be followed by a subsequent call to ``wait_xxx()``.
-
-IVnf
-----
-
-.. code-block:: python
-
- class IVnf:
- start(memory, cpus,
- monitor_path, shared_path_host,
- shared_path_guest, guest_prompt)
- stop()
- execute(command)
- wait(guest_prompt)
- execute_and_wait (command)
-
-IPktFwd
---------
-
- .. code-block:: python
-
- class IPktFwd:
- start()
- stop()
-
-
-Controllers
------------
-
-Controllers are used in conjunction with abstract interfaces as way
-of decoupling the control of vSwtiches, VNFs, TrafficGenerators
-and Forwarding Applications from other components.
-
-The controlled classes provide basic primitive operations. The Controllers
-sequence and co-ordinate these primitive operation in to useful actions. For
-instance the vswitch_controller_p2p can be used to bring any vSwitch (that
-implements the primitives defined in IVSwitch) into the configuration required
-by the Phy-to-Phy Deployment Scenario.
-
-In order to support a new vSwitch only a new implementation of IVSwitch needs
-be created for the new vSwitch to be capable of fulfilling all the Deployment
-Scenarios provided for by existing or future vSwitch Controllers.
-
-Similarly if a new Deployment Scenario is required it only needs to be written
-once as a new vSwitch Controller and it will immediately be capable of
-controlling all existing and future vSwitches in to that Deployment Scenario.
-
-Similarly the Traffic Controllers can be used to co-ordinate basic operations
-provided by implementers of ITrafficGenerator to provide useful tests. Though
-traffic generators generally already implement full test cases i.e. they both
-generate suitable traffic and analyse returned traffic in order to implement a
-test which has typically been predefined in an RFC document. However the
-Traffic Controller class allows for the possibility of further enhancement -
-such as iterating over tests for various packet sizes or creating new tests.
-
-Traffic Controller's Role
--------------------------
-
-.. image:: traffic_controller.png
-
-
-Loader & Component Factory
---------------------------
-
-The working of the Loader package (which is responsible for *finding* arbitrary
-classes based on configuration data) and the Component Factory which is
-responsible for *choosing* the correct class for a particular situation - e.g.
-Deployment Scenario can be seen in this diagram.
-
-.. image:: factory_and_loader.png
-
-Routing Tables
-==============
-
-Vsperf uses a standard set of routing tables in order to allow tests to easily
-mix and match Deployment Scenarios (PVP, P2P topology), Tuple Matching and
-Frame Modification requirements.
-
-.. code-block:: console
-
- +--------------+
- | |
- | Table 0 | table#0 - Match table. Flows designed to force 5 & 10
- | | tuple matches go here.
- | |
- +--------------+
- |
- |
- v
- +--------------+ table#1 - Routing table. Flow entries to forward
- | | packets between ports goes here.
- | Table 1 | The chosen port is communicated to subsequent tables by
- | | setting the metadata value to the egress port number.
- | | Generally this table is set-up by by the
- +--------------+ vSwitchController.
- |
- |
- v
- +--------------+ table#2 - Frame modification table. Frame modification
- | | flow rules are isolated in this table so that they can
- | Table 2 | be turned on or off without affecting the routing or
- | | tuple-matching flow rules. This allows the frame
- | | modification and tuple matching required by the tests
- | | in the VSWITCH PERFORMANCE FOR TELCO NFV test
- +--------------+ specification to be independent of the Deployment
- | Scenario set up by the vSwitchController.
- |
- v
- +--------------+
- | |
- | Table 3 | table#3 - Egress table. Egress packets on the ports
- | | setup in Table 1.
- +--------------+
-
-