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To: Itsuro Oda <oda@valinux.co.jp>, spp@dpdk.org
References: <20200412230210.28685-1-oda@valinux.co.jp>
 <20200510234339.28011-1-oda@valinux.co.jp>
From: Yasufumi Ogawa <yasufum.o@gmail.com>
Message-ID: <f7d5df77-ef26-53bc-8c05-13dc4dac81a3@gmail.com>
Date: Mon, 25 May 2020 12:08:53 +0900
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Subject: Re: [spp] [PATCH v2] docs: add document of vdev_test tool
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> This patch adds a document of vdev_test tool.
Acked-by: Yasufumi Ogawa <yasufum.o@gmail.com>

> 
> Signed-off-by: Itsuro Oda <oda@valinux.co.jp>
> ---
> v2:
> * remove a blank line at EOF
> 
>   .../vdev_test/vdev_test_example_pipe.svg      | 611 ++++++++++++++++++
>   .../vdev_test/vdev_test_example_vhost.svg     | 564 ++++++++++++++++
>   docs/guides/tools/index.rst                   |   1 +
>   docs/guides/tools/vdev_test.rst               |  85 +++
>   4 files changed, 1261 insertions(+)
>   create mode 100644 docs/guides/images/tools/vdev_test/vdev_test_example_pipe.svg
>   create mode 100644 docs/guides/images/tools/vdev_test/vdev_test_example_vhost.svg
>   create mode 100644 docs/guides/tools/vdev_test.rst
> 
> diff --git a/docs/guides/images/tools/vdev_test/vdev_test_example_pipe.svg b/docs/guides/images/tools/vdev_test/vdev_test_example_pipe.svg
> new file mode 100644
> index 0000000..72f5919
> --- /dev/null
> +++ b/docs/guides/images/tools/vdev_test/vdev_test_example_pipe.svg
> @@ -0,0 +1,611 @@
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> diff --git a/docs/guides/tools/index.rst b/docs/guides/tools/index.rst
> index c739d79..495b9a8 100644
> --- a/docs/guides/tools/index.rst
> +++ b/docs/guides/tools/index.rst
> @@ -12,3 +12,4 @@ Tools
>   
>      sppc/index
>      helpers/index
> +   vdev_test.rst
> diff --git a/docs/guides/tools/vdev_test.rst b/docs/guides/tools/vdev_test.rst
> new file mode 100644
> index 0000000..90a2647
> --- /dev/null
> +++ b/docs/guides/tools/vdev_test.rst
> @@ -0,0 +1,85 @@
> +..  SPDX-License-Identifier: BSD-3-Clause
> +    Copyright(c) 2020 Nippon Telegraph and Telephone Corporation
> +
> +.. _spp_tools_vdev_test:
> +
> +Vdev_test
> +=========
> +
> +Vdev_test is a simple application that it forwards packets received
> +from rx queue to tx queue on the main core. It can become a secondary
> +process of the spp_primary. It is mainly used for testing spp_pipe
> +but it can be used to test any virtual Ethernet devices as well.
> +
> +Usage
> +-----
> +
> +.. code-block:: none
> +
> +    vdev_test [EAL options] -- [--send] [--create devargs] device-name
> +
> +Vdev_test runs foreground and stops when Ctrl-C is pressed. If ``--send``
> +option specified a packet is sent first. The virtual Ethernet device can
> +be created to specify ``--create`` option.
> +
> +.. note::
> +
> +    Since the device can be created by EAL ``--vdev`` option for a
> +    primary process, ``--create`` option mainly used by a secondary
> +    process.
> +
> +Examples
> +--------
> +
> +Examining spp_pipe
> +~~~~~~~~~~~~~~~~~~
> +
> +.. _figure_vdev_test_example_pipe:
> +
> +.. figure:: ../images/tools/vdev_test/vdev_test_example_pipe.*
> +   :width: 50%
> +
> +It is assumed that pipe ports were created beforehand. First run vdev_test
> +without ``--send`` option.
> +
> +.. code-block:: console
> +
> +    # terminal 1
> +    $ sudo vdev_test -l 8 -n 4 --proc-type secondary -- spp_pipe0
> +
> +Then run vdev_test with ``--send`` option on another terminal.
> +
> +.. code-block:: console
> +
> +    # terminal 2
> +    $ sudo vdev_test -l 9 -n 4 --proc-type secondary -- --send spp_pipe1
> +
> +Press Ctrl-C to stop processes on both terminals after for a while.
> +
> +Examining vhost
> +~~~~~~~~~~~~~~~
> +
> +.. _figure_vdev_test_example_vhost:
> +
> +.. figure:: ../images/tools/vdev_test/vdev_test_example_vhost.*
> +   :width: 50%
> +
> +This example is independent of SPP. First run vdev_test using eth_vhost0
> +without ``--send`` option.
> +
> +.. code-block:: console
> +
> +    # terminal 1
> +    $ sudo vdev_test -l 8 -n 4 --vdev eht_vhost0,iface=/tmp/sock0,client=1 \
> +      --file-prefix=app1 -- eth_vhost0
> +
> +Then run vdev_test using virtio_user0 with ``--send`` option on another
> +terminal.
> +
> +.. code-block:: console
> +
> +    # terminal 1
> +    $ sudo vdev_test -l 9 -n 4 --vdev virtio_user0,path=/tmp/sock0,server=1 \
> +      --file-prefix=app2 --single-file-segments -- --send virtio_user0
> +
> +Press Ctrl-C to stop processes on both terminals after for a while.
>