[PATCH v2 12/12] app/mldev: add documentation for mldev test cases

[Srikanth Yalavarthi <syalavarthi@marvell.com>]

Added documentation specific to mldev test cases. Added details
about all test cases and option supported by individual tests.

Signed-off-by: Srikanth Yalavarthi <syalavarthi@marvell.com>
---
 MAINTAINERS                                   |   1 +
 .../tools/img/mldev_inference_interleave.svg  | 667 ++++++++++++++++++
 .../tools/img/mldev_inference_ordered.svg     | 526 ++++++++++++++
 .../tools/img/mldev_model_ops_subtest_a.svg   | 418 +++++++++++
 .../tools/img/mldev_model_ops_subtest_b.svg   | 421 +++++++++++
 .../tools/img/mldev_model_ops_subtest_c.svg   | 364 ++++++++++
 .../tools/img/mldev_model_ops_subtest_d.svg   | 422 +++++++++++
 doc/guides/tools/index.rst                    |   1 +
 doc/guides/tools/testmldev.rst                | 441 ++++++++++++
 9 files changed, 3261 insertions(+)
 create mode 100644 doc/guides/tools/img/mldev_inference_interleave.svg
 create mode 100644 doc/guides/tools/img/mldev_inference_ordered.svg
 create mode 100644 doc/guides/tools/img/mldev_model_ops_subtest_a.svg
 create mode 100644 doc/guides/tools/img/mldev_model_ops_subtest_b.svg
 create mode 100644 doc/guides/tools/img/mldev_model_ops_subtest_c.svg
 create mode 100644 doc/guides/tools/img/mldev_model_ops_subtest_d.svg
 create mode 100644 doc/guides/tools/testmldev.rst

diff --git a/MAINTAINERS b/MAINTAINERS
index 1edea42fad..1cddd6ead2 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -540,6 +540,7 @@ M: Srikanth Yalavarthi <syalavarthi@marvell.com>
 F: lib/mldev/
 F: app/test-mldev/
 F: doc/guides/prog_guide/mldev.rst
+F: doc/guides/tools/testmldev.rst
 
 
 Memory Pool Drivers
diff --git a/doc/guides/tools/img/mldev_inference_interleave.svg b/doc/guides/tools/img/mldev_inference_interleave.svg
new file mode 100644
index 0000000000..517c53d294
--- /dev/null
+++ b/doc/guides/tools/img/mldev_inference_interleave.svg
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diff --git a/doc/guides/tools/index.rst b/doc/guides/tools/index.rst
index f1f5b94c8c..6f84fc31ff 100644
--- a/doc/guides/tools/index.rst
+++ b/doc/guides/tools/index.rst
@@ -21,4 +21,5 @@ DPDK Tools User Guides
     comp_perf
     testeventdev
     testregex
+    testmldev
     dts
diff --git a/doc/guides/tools/testmldev.rst b/doc/guides/tools/testmldev.rst
new file mode 100644
index 0000000000..845c2d9381
--- /dev/null
+++ b/doc/guides/tools/testmldev.rst
@@ -0,0 +1,441 @@
+..  SPDX-License-Identifier: BSD-3-Clause
+    Copyright (c) 2022 Marvell.
+
+dpdk-test-mldev Application
+===========================
+
+The ``dpdk-test-mldev`` tool is a Data Plane Development Kit (DPDK) application that allows testing
+various mldev use cases. This application has a generic framework to add new mldev based test cases
+to verify functionality and measure the performance of inference execution on DPDK ML devices.
+
+
+Application and Options
+-----------------------
+
+The application has a number of command line options:
+
+.. code-block:: console
+
+   dpdk-test-mldev [EAL Options] -- [application options]
+
+EAL Options
+~~~~~~~~~~~
+
+The following are the EAL command-line options that can be used with the ``dpdk-test-mldev``
+application. See the DPDK Getting Started Guides for more information on these options.
+
+*   ``-c <COREMASK>`` or ``-l <CORELIST>``
+
+        Set the hexadecimal bitmask of the cores to run on. The corelist is a list of cores to use.
+
+*   ``-a <PCI_ID>``
+
+        Attach a PCI based ML device. Specific to drivers using a PCI based ML devices.
+
+*   ``--vdev <driver>``
+
+        Add a virtual mldev device. Specific to drivers using a ML virtual device.
+
+
+Application Options
+~~~~~~~~~~~~~~~~~~~
+
+The following are the command-line options supported by the test application.
+
+* ``--test <name>``
+
+        ML tests are divided into two groups, Model and Device tests and Inference tests. Test
+        name one of the following supported tests.
+
+      **ML Device Tests** ::
+
+         device_ops
+
+      **ML Model Tests** ::
+
+         model_ops
+
+      **ML Inference Tests** ::
+
+         inference_ordered
+         inference_interleave
+
+* ``--dev_id <n>``
+
+        Set the device id of the ML device to be used for the test. Default value is `0`.
+
+* ``--socket_id <n>``
+
+        Set the socket id of the application resources. Default value is `SOCKET_ID_ANY`.
+
+* ``--debug``
+
+        Enable the tests to run in debug mode.
+
+* ``--models <model_list>``
+
+        Set the list of model files to be used for the tests. Application expects the
+        ``model_list`` in comma separated form (i.e. ``--models model_A.bin,model_B.bin``).
+        Maximum number of models supported by the test is ``8``.
+
+* ``--filelist <file_list>``
+
+        Set the list of model, input, output and reference files to be used for the tests.
+        Application expects the ``file_list`` to be in comma separated form
+        (i.e. ``--filelist <model,input,output>[,reference]``).
+
+        Multiple filelist entries can be specified when running the tests with multiple models.
+        Both quantized and dequantized outputs are written to the disk. Dequantized output file
+        would have the name specified by the user through ``--filelist`` option. A suffix ``.q``
+        is appended to quantized output filename. Maximum number of filelist entries supported
+        by the test is ``8``.
+
+* ``--repetitions <n>``
+
+        Set the number of inference repetitions to be executed in the test per each model. Default
+        value is `1`.
+
+* ``--burst_size <n>``
+
+        Set the burst size to be used when enqueuing / dequeuing inferences. Default value is `1`.
+
+* ``--queue_pairs <n>``
+
+        Set the number of queue-pairs to be used for inference enqueue and dequeue operations.
+        Default value is `1`.
+
+* ``--queue_size <n>``
+
+        Set the size of queue-pair to be created for inference enqueue / dequeue operations.
+        Queue size would translate into `rte_ml_dev_qp_conf::nb_desc` field during queue-pair
+        creation. Default value is `1`.
+
+* ``--batches <n>``
+
+        Set the number batches in the input file provided for inference run. When not specified
+        the test would assume the number of batches is equal to the batch size of the model.
+
+* ``--tolerance <n>``
+
+        Set the tolerance value in percentage to be used for output validation. Default value
+        is `0`.
+
+* ``--stats``
+
+        Enable reporting device extended stats.
+
+
+ML Device Tests
+-------------------------
+
+ML device tests are functional tests to validate ML device APIs. Device tests validate the ML device
+handling APIs configure, close, start and stop APIs.
+
+
+Application Options
+~~~~~~~~~~~~~~~~~~~
+
+Supported command line options for the `model_ops` test are following::
+
+        --debug
+        --test
+        --dev_id
+        --socket_id
+        --queue_pairs
+        --queue_size
+
+
+DEVICE_OPS Test
+~~~~~~~~~~~~~~~
+
+Device ops test validates the device configuration and reconfiguration support. The test configures
+ML device based on the option ``--queue_pairs`` and ``--queue_size`` specified by the user, and
+later reconfigures the ML device with the number of queue pairs and queue size based the maximum
+specified through the device info.
+
+
+Example
+^^^^^^^
+
+Command to run device_ops test:
+
+.. code-block:: console
+
+    sudo <build_dir>/app/dpdk-test-mldev -c 0xf -a <PCI_ID> -- \
+        --test=device_ops
+
+
+Command to run device_ops test with user options:
+
+.. code-block:: console
+
+    sudo <build_dir>/app/dpdk-test-mldev -c 0xf -a <PCI_ID> -- \
+        --test=device_ops --queue_pairs <M> --queue_size <N>
+
+
+ML Model Tests
+-------------------------
+
+Model tests are functional tests to validate ML model APIs. Model tests validate the functioning
+of APIs to load, start, stop and unload ML models.
+
+
+Application Options
+~~~~~~~~~~~~~~~~~~~
+
+Supported command line options for the `model_ops` test are following::
+
+        --debug
+        --test
+        --dev_id
+        --socket_id
+        --models
+
+
+List of model files to be used for the `model_ops` test can be specified through the option
+``--models <model_list>`` as a comma separated list. Maximum number of models supported in
+the test is `8`.
+
+.. Note::
+
+    * The ``--models <model_list>`` is a mandatory option for running this test.
+    * Options not supported by the test are ignored if specified.
+
+
+MODEL_OPS Test
+~~~~~~~~~~~~~~
+
+The test is a collection of multiple sub-tests, each with a different order of slow-path
+operations when handling with `N` number of models.
+
+
+**Sub-test A:** executes the sequence of load / start / stop / unload for a model in order,
+followed by next model.
+.. _figure_mldev_model_ops_subtest_a:
+
+.. figure:: img/mldev_model_ops_subtest_a.*
+
+   Execution sequence of model_ops subtest A.
+
+
+**Sub-test B:** executes load for all models, followed by a start for all models. Upon successful
+start of all models, stop is invoked for all models followed by unload.
+.. _figure_mldev_model_ops_subtest_b:
+
+.. figure:: img/mldev_model_ops_subtest_b.*
+
+   Execution sequence of model_ops subtest B.
+
+
+**Sub-test C:** loads all models, followed by a start and stop of all models in order. Upon
+completion of stop, unload is invoked for all models.
+.. _figure_mldev_model_ops_subtest_c:
+
+.. figure:: img/mldev_model_ops_subtest_c.*
+
+   Execution sequence of model_ops subtest C.
+
+
+**Sub-test D:** executes load and start for all models available. Upon successful start of all
+models, stop and stop is executed for the models.
+.. _figure_mldev_model_ops_subtest_d:
+
+.. figure:: img/mldev_model_ops_subtest_d.*
+
+   Execution sequence of model_ops subtest D.
+
+
+Example
+^^^^^^^
+
+Command to run model_ops test:
+
+.. code-block:: console
+
+    sudo <build_dir>/app/dpdk-test-mldev -c 0xf -a <PCI_ID> -- \
+        --test=model_ops --models model_1.bin,model_2.bin,model_3.bin, model_4.bin
+
+
+ML Inference Tests
+------------------
+
+Inference tests are a set of tests to validate end-to-end inference execution on ML device.
+These tests executes the full sequence of operations required to run inferences with one or
+multiple models.
+
+Application Options
+~~~~~~~~~~~~~~~~~~~
+
+Supported command line options for inference tests are following::
+
+        --debug
+        --test
+        --dev_id
+        --socket_id
+        --filelist
+        --repetitions
+        --burst_size
+        --queue_pairs
+        --queue_size
+        --batches
+        --tolerance
+        --stats
+
+
+List of files to be used for the inference tests can be specified through the option
+``--filelist <file_list>`` as a comma separated list. A filelist entry would be of the format
+``--filelist <model_file,input_file,output_file>[,reference_file]`` and is used to specify the
+list of files required to test with a single model. Multiple filelist entries are supported by
+the test, one entry per model. Maximum number of file entries supported by the test is `8`.
+
+When ``--burst_size <num>`` option is specified for the test, enqueue and dequeue burst would
+try to enqueue or dequeue ``num`` number of inferences per each call respectively.
+
+In the inference test, a pair of lcores are mapped to each queue pair. Minimum number of lcores
+required for the tests is equal to ``(queue_pairs * 2 + 1)``.
+
+Output validation of inference would be enabled only when a reference file is specified through
+the ``--filelist`` option. Application would additionally consider the tolerance value provided
+through ``--tolerance`` option during validation. When the tolerance values is 0, CRC32 hash of
+inference output and reference output are compared. When the tolerance is non-zero, element wise
+comparison of output is performed. Validation is considered as successful only when all the
+elements of the output tensor are with in the tolerance range specified.
+
+When ``--debug`` option is specified, tests are run in debug mode.
+
+Enabling ``--stats`` would print the extended stats supported by the driver.
+
+.. Note::
+
+    * The ``--filelist <file_list>`` is a mandatory option for running inference tests.
+    * Options not supported by the tests are ignored if specified.
+    * Element wise comparison is not supported when the output dtype is either fp8, fp16
+      or bfloat16. This is applicable only when the tolerance is greater than zero and for
+      pre-quantized models only.
+
+
+INFERENCE_ORDERED Test
+~~~~~~~~~~~~~~~~~~~~~~
+
+This is a functional test for validating the end-to-end inference execution on ML device. This
+test configures ML device and queue pairs as per the queue-pair related options (queue_pairs and
+queue_size) specified by the user. Upon successful configuration of the device and queue pairs,
+the first model specified through the filelist is loaded to the device and inferences are enqueued
+by a pool of worker threads to the ML device. Total number of inferences enqueued for the model
+are equal to the repetitions specified. A dedicated pool of worker threads would dequeue the
+inferences from the device. The model is unloaded upon completion of all inferences for the model.
+The test would continue loading and executing inference requests for all models specified
+through ``filelist`` option in an ordered manner.
+
+.. _figure_mldev_inference_ordered:
+
+.. figure:: img/mldev_inference_ordered.*
+
+   Execution of inference_ordered on single model.
+
+
+Example
+^^^^^^^
+
+Example command to run inference_ordered test:
+
+.. code-block:: console
+
+    sudo <build_dir>/app/dpdk-test-mldev -c 0xf -a <PCI_ID> -- \
+        --test=inference_ordered --filelist model.bin,input.bin,output.bin
+
+Example command to run inference_ordered with output validation using tolerance of `1%``:
+
+.. code-block:: console
+
+    sudo <build_dir>/app/dpdk-test-mldev -c 0xf -a <PCI_ID> -- \
+        --test=inference_ordered --filelist model.bin,input.bin,output.bin,reference.bin \
+        --tolerance 1.0
+
+Example command to run inference_ordered test with multiple queue-pairs and queue size:
+
+.. code-block:: console
+
+    sudo <build_dir>/app/dpdk-test-mldev -c 0xf -a <PCI_ID> -- \
+        --test=inference_ordered --filelist model.bin,input.bin,output.bin \
+        --queue_pairs 4 --queue_size 16
+
+Example command to run inference_ordered test with a specific burst size:
+
+.. code-block:: console
+
+    sudo <build_dir>/app/dpdk-test-mldev -c 0xf -a <PCI_ID> -- \
+        --test=inference_ordered --filelist model.bin,input.bin,output.bin \
+        --burst_size 12
+
+
+INFERENCE_INTERLEAVE Test
+~~~~~~~~~~~~~~~~~~~~~~~~~
+
+This is a stress test for validating the end-to-end inference execution on ML device. The test
+configures the ML device and queue pairs as per the queue-pair related options (queue_pairs
+and queue_size) specified by the user. Upon successful configuration of the device and queue
+pairs, all models specified through the filelist are loaded to the device. Inferences for multiple
+models are enqueued by a pool of worker threads in parallel. Inference execution by the device is
+interleaved between multiple models. Total number of inferences enqueued for a model are equal to
+the repetitions specified. An additional pool of threads would dequeue the inferences from the
+device. Models would be unloaded upon completion of inferences for all models loaded.
+
+
+.. _figure_mldev_inference_interleave:
+
+.. figure:: img/mldev_inference_interleave.*
+
+   Execution of inference_interleave on single model.
+
+
+Example
+^^^^^^^
+
+Example command to run inference_interleave test:
+
+.. code-block:: console
+
+    sudo <build_dir>/app/dpdk-test-mldev -c 0xf -a <PCI_ID> -- \
+        --test=inference_interleave --filelist model.bin,input.bin,output.bin
+
+
+Example command to run inference_interleave test with multiple models:
+
+.. code-block:: console
+
+    sudo <build_dir>/app/dpdk-test-mldev -c 0xf -a <PCI_ID> -- \
+        --test=inference_interleave --filelist model_A.bin,input_A.bin,output_A.bin \
+        --filelist model_B.bin,input_B.bin,output_B.bin
+
+
+Example command to run inference_interleave test with multiple models ad output validation
+using tolerance of `2.0%``:
+
+.. code-block:: console
+
+    sudo <build_dir>/app/dpdk-test-mldev -c 0xf -a <PCI_ID> -- \
+        --test=inference_interleave \
+        --filelist model_A.bin,input_A.bin,output_A.bin,reference_A.bin \
+        --filelist model_B.bin,input_B.bin,output_B.bin,reference_B.bin \
+        --tolerance 2.0
+
+Example command to run inference_interleave test with multiple queue-pairs and queue size
+and burst size:
+
+.. code-block:: console
+
+    sudo <build_dir>/app/dpdk-test-mldev -c 0xf -a <PCI_ID> -- \
+        --test=inference_interleave --filelist model.bin,input.bin,output.bin \
+        --queue_pairs 8 --queue_size 12 --burst_size 16
+
+
+Debug mode
+----------
+
+ML tests can be executed in debug mode by enabling the option ``--debug``. Execution of tests in
+debug mode would enable additional prints.
+
+When a validation failure is observed, output from that buffer is written to the disk, with the
+filenames having similar convention when the test has passed. Additionally index of the buffer
+would be appended to the filenames.
-- 
2.17.1