path: root/docs/userguides/quickstart.rst

=============================
Getting Started with 'vsperf'
=============================

Hardware Requirements
---------------------

VSPERF requires one of the following traffic generators to run tests:

- IXIA traffic generator (IxNetwork hardware) and a machine that runs the IXIA client software
- Spirent traffic generator (TestCenter hardware chassis or TestCenter virtual in a VM) and a
  VM to run the Spirent Virtual Deployment Service image, formerly known as "Spirent LabServer".

Both test configurations, above, also require a CentOS Linux release 7.1.1503 (Core) host.

vSwitch Requirements
--------------------

The vSwitch must support Open Flow 1.3 or greater.

Installation
------------

Follow the `installation instructions <http://artifacts.opnfv.org/vswitchperf/docs/docs/guides/index.html>`__ to install.

Traffic Generator Setup
-----------------------
Follow the `Traffic generator instructions <http://artifacts.opnfv.org/vswitchperf/docs/docs/guides/trafficgen.html>`__ to install and configure a suitable traffic generator.

Cloning and building src dependencies
-------------------------------------

In order to run VSPERF, you will need to download DPDK and OVS. You can
do this manually and build them in a preferred location, or you could
use vswitchperf/src. The vswitchperf/src directory contains makefiles
that will allow you to clone and build the libraries that VSPERF depends
on, such as DPDK and OVS. To clone and build simply:

  .. code-block:: console

    cd src
    make

VSPERF can be used with OVS without DPDK support. In this case you have
to specify path to the kernel sources by WITH\_LINUX parameter:

  .. code-block:: console

     cd src
     make WITH_LINUX=/lib/modules/`uname -r`/build

To build DPDK and OVS for PVP and PVVP testing with vhost_user as the guest
access method, use:

  .. code-block:: console

     make VHOST_USER=y

To build everything: Vanilla OVS, OVS with vhost_user as the guest access
method and OVS with vhost_cuse access simply:

  .. code-block:: console

     make

The vhost_user build will reside in src/ovs/
The vhost_cuse build will reside in vswitchperf/src_cuse
The Vanilla OVS build will reside in vswitchperf/src_vanilla

To delete a src subdirectory and its contents to allow you to re-clone simply
use:

  .. code-block:: console

     make clobber

Configure the ``./conf/10_custom.conf`` file
--------------------------------------------
The ``10_custom.conf`` file is the configuration file that overrides
default configurations in all the other configuration files in ``./conf``
The supplied ``10_custom.conf`` file must be modified, as it contains
configuration items for which there are no reasonable default values.

The configuration items that can be added is not limited to the initial
contents. Any configuration item mentioned in any .conf file in
``./conf`` directory can be added and that item will be overridden by
the custom configuration value.

Using a custom settings file
----------------------------

If your ``10_custom.conf`` doesn't reside in the ``./conf`` directory
of if you want to use an alternative configuration file, the file can
be passed to ``vsperf`` via the ``--conf-file`` argument.

  .. code-block:: console

    ./vsperf --conf-file <path_to_settings_py> ...

Note that configuration passed in via the environment (``--load-env``)
or via another command line argument will override both the default and
your custom configuration files. This "priority hierarchy" can be
described like so (1 = max priority):

1. Command line arguments
2. Environment variables
3. Configuration file(s)

--------------

Executing tests
---------------

Before running any tests make sure you have root permissions by adding
the following line to /etc/sudoers:

  .. code-block:: console

    username ALL=(ALL)       NOPASSWD: ALL

username in the example above should be replaced with a real username.

To list the available tests:

  .. code-block:: console

    ./vsperf --list

To run a single test:

  .. code-block:: console

    ./vsperf $TESTNAME

Where $TESTNAME is the name of the vsperf test you would like to run.

To run a group of tests, for example all tests with a name containing
'RFC2544':

  .. code-block:: console

    ./vsperf --conf-file=user_settings.py --tests="RFC2544"

To run all tests:

  .. code-block:: console

    ./vsperf --conf-file=user_settings.py

Some tests allow for configurable parameters, including test duration
(in seconds) as well as packet sizes (in bytes).

.. code:: bash

    ./vsperf --conf-file user_settings.py
        --tests RFC2544Tput
        --test-param "duration=10;pkt_sizes=128"

For all available options, check out the help dialog:

  .. code-block:: console

    ./vsperf --help

Executing Vanilla OVS tests
----------------------------
If you have compiled all the variants of OVS in ''src/'' please skip
step 1.

1. Recompile src for Vanilla OVS testing

  .. code-block:: console

     cd src
     make cleanse
     make WITH_LINUX=/lib/modules/`uname -r`/build

2. Update your ''10_custom.conf'' file to use the appropriate variables
for Vanilla OVS:

  .. code-block:: console

   VSWITCH = 'OvsVanilla'
   VSWITCH_VANILLA_PHY_PORT_NAMES = ['$PORT1', '$PORT1']

Where $PORT1 and $PORT2 are the Linux interfaces you'd like to bind
to the vswitch.

3. Run test:

  .. code-block:: console

     ./vsperf --conf-file <path_to_settings_py>

Please note if you don't want to configure Vanilla OVS through the
configuration file, you can pass it as a CLI argument; BUT you must
set the ports.

  .. code-block:: console

    ./vsperf --vswitch OvsVanilla


Executing PVP and PVVP tests
----------------------------
To run tests using vhost-user as guest access method:

1. Set VHOST_METHOD and VNF of your settings file to:

  .. code-block:: console

   VHOST_METHOD='user'
   VNF = 'QemuDpdkVhost'

2. Recompile src for VHOST USER testing

  .. code-block:: console

     cd src
     make cleanse
     make VHOST_USER=y

3. Run test:

  .. code-block:: console

     ./vsperf --conf-file <path_to_settings_py>

To run tests using vhost-cuse as guest access method:

1. Set VHOST_METHOD and VNF of your settings file to:

  .. code-block:: console

     VHOST_METHOD='cuse'
     VNF = 'QemuDpdkVhostCuse'

2. Recompile src for VHOST USER testing

  .. code-block:: console

     cd src
     make cleanse
     make VHOST_USER=n

3. Run test:

  .. code-block:: console

     ./vsperf --conf-file <path_to_settings_py>

Executing PVP tests using Vanilla OVS
-------------------------------------
To run tests using Vanilla OVS:

1. Set the following variables:

  .. code-block:: console

   VSWITCH = 'OvsVanilla'
   VNF = 'QemuVirtioNet'

   VANILLA_TGEN_PORT1_IP = n.n.n.n
   VANILLA_TGEN_PORT1_MAC = nn:nn:nn:nn:nn:nn

   VANILLA_TGEN_PORT2_IP = n.n.n.n
   VANILLA_TGEN_PORT2_MAC = nn:nn:nn:nn:nn:nn

   VANILLA_BRIDGE_IP = n.n.n.n

   or use --test-param

   ./vsperf --conf-file user_settings.py
            --test-param "vanilla_tgen_tx_ip=n.n.n.n;
                          vanilla_tgen_tx_mac=nn:nn:nn:nn:nn:nn"


2. Recompile src for Vanilla OVS testing

  .. code-block:: console

     cd src
     make cleanse
     make WITH_LINUX=/lib/modules/`uname -r`/build

3. Run test:

  .. code-block:: console

     ./vsperf --conf-file <path_to_settings_py>

Selection of loopback application for PVP and PVVP tests
--------------------------------------------------------
To select loopback application, which will perform traffic forwarding
inside VM, following configuration parameter should be configured:

  .. code-block:: console

     GUEST_LOOPBACK = ['testpmd', 'testpmd']

     or use --test-param

     ./vsperf --conf-file user_settings.py
              --test-param "guest_loopback=testpmd"

Supported loopback applications are:

  .. code-block:: console

     'testpmd'       - testpmd from dpdk will be built and used
     'l2fwd'         - l2fwd module provided by Huawei will be built and used
     'linux_bridge'  - linux bridge will be configured
     'buildin'       - nothing will be configured by vsperf; VM image must
                       ensure traffic forwarding between its interfaces

Guest loopback application must be configured, otherwise traffic
will not be forwarded by VM and testcases with PVP and PVVP deployments
will fail. Guest loopback application is set to 'testpmd' by default.

Code change verification by pylint
----------------------------------
Every developer participating in VSPERF project should run
pylint before his python code is submitted for review. Project
specific configuration for pylint is available at 'pylint.rc'.

Example of manual pylint invocation:

  .. code-block:: console

          pylint --rcfile ./pylintrc ./vsperf

GOTCHAs:
--------

OVS with DPDK and QEMU
~~~~~~~~~~~~~~~~~~~~~~~
If you encounter the following error: "before (last 100 chars):
'-path=/dev/hugepages,share=on: unable to map backing store for
hugepages: Cannot allocate memory\r\n\r\n" with the PVP or PVVP
deployment scenario, check the amount of hugepages on your system:

.. code:: bash

    cat /proc/meminfo | grep HugePages


By default the vswitchd is launched with 1Gb of memory, to  change
this, modify --socket-mem parameter in conf/02_vswitch.conf to allocate
an appropriate amount of memory:

.. code:: bash

    VSWITCHD_DPDK_ARGS = ['-c', '0x4', '-n', '4', '--socket-mem 1024,0']