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rte_mldev.h(3) DPDK rte_mldev.h(3)

NAME

rte_mldev.h

SYNOPSIS

#include <rte_common.h>
#include <rte_log.h>
#include <rte_mempool.h>

Data Structures


struct rte_ml_dev_info
struct rte_ml_dev_config
struct rte_ml_dev_qp_conf
struct rte_ml_buff_seg
struct rte_ml_op
struct rte_ml_op_error
struct rte_ml_dev_stats
struct rte_ml_dev_xstats_map
struct rte_ml_model_params
struct rte_ml_io_info
struct rte_ml_model_info

Macros


#define RTE_ML_STR_MAX 128

Typedefs


typedef void(* rte_ml_dev_stop_flush_t) (int16_t dev_id, uint16_t qp_id, struct rte_ml_op *op)

Enumerations


enum rte_ml_op_status { RTE_ML_OP_STATUS_SUCCESS = 0, RTE_ML_OP_STATUS_NOT_PROCESSED, RTE_ML_OP_STATUS_ERROR }
enum rte_ml_dev_xstats_mode { RTE_ML_DEV_XSTATS_DEVICE, RTE_ML_DEV_XSTATS_MODEL }
enum rte_ml_io_type { RTE_ML_IO_TYPE_UNKNOWN = 0, RTE_ML_IO_TYPE_INT8, RTE_ML_IO_TYPE_UINT8, RTE_ML_IO_TYPE_INT16, RTE_ML_IO_TYPE_UINT16, RTE_ML_IO_TYPE_INT32, RTE_ML_IO_TYPE_UINT32, RTE_ML_IO_TYPE_FP8, RTE_ML_IO_TYPE_FP16, RTE_ML_IO_TYPE_FP32, RTE_ML_IO_TYPE_BFLOAT16 }
enum rte_ml_io_layout { RTE_ML_IO_LAYOUT_PACKED, RTE_ML_IO_LAYOUT_SPLIT }

Functions


__rte_experimental int rte_ml_dev_init (size_t dev_max)
__rte_experimental uint16_t rte_ml_dev_count (void)
__rte_experimental int rte_ml_dev_is_valid_dev (int16_t dev_id)
__rte_experimental int rte_ml_dev_socket_id (int16_t dev_id)
__rte_experimental int rte_ml_dev_info_get (int16_t dev_id, struct rte_ml_dev_info *dev_info)
__rte_experimental int rte_ml_dev_configure (int16_t dev_id, const struct rte_ml_dev_config *config)
__rte_experimental int rte_ml_dev_queue_pair_setup (int16_t dev_id, uint16_t queue_pair_id, const struct rte_ml_dev_qp_conf *qp_conf, int socket_id)
__rte_experimental int rte_ml_dev_start (int16_t dev_id)
__rte_experimental int rte_ml_dev_stop (int16_t dev_id)
__rte_experimental int rte_ml_dev_close (int16_t dev_id)
__rte_experimental uint16_t rte_ml_enqueue_burst (int16_t dev_id, uint16_t qp_id, struct rte_ml_op **ops, uint16_t nb_ops)
__rte_experimental uint16_t rte_ml_dequeue_burst (int16_t dev_id, uint16_t qp_id, struct rte_ml_op **ops, uint16_t nb_ops)
__rte_experimental int rte_ml_op_error_get (int16_t dev_id, struct rte_ml_op *op, struct rte_ml_op_error *error)
__rte_experimental int rte_ml_dev_stats_get (int16_t dev_id, struct rte_ml_dev_stats *stats)
__rte_experimental void rte_ml_dev_stats_reset (int16_t dev_id)
__rte_experimental int rte_ml_dev_xstats_names_get (int16_t dev_id, enum rte_ml_dev_xstats_mode mode, int32_t model_id, struct rte_ml_dev_xstats_map *xstats_map, uint32_t size)
__rte_experimental int rte_ml_dev_xstats_by_name_get (int16_t dev_id, const char *name, uint16_t *stat_id, uint64_t *value)
__rte_experimental int rte_ml_dev_xstats_get (int16_t dev_id, enum rte_ml_dev_xstats_mode mode, int32_t model_id, const uint16_t stat_ids[], uint64_t values[], uint16_t nb_ids)
__rte_experimental int rte_ml_dev_xstats_reset (int16_t dev_id, enum rte_ml_dev_xstats_mode mode, int32_t model_id, const uint16_t stat_ids[], uint16_t nb_ids)
__rte_experimental int rte_ml_dev_dump (int16_t dev_id, FILE *fd)
__rte_experimental int rte_ml_dev_selftest (int16_t dev_id)
__rte_experimental int rte_ml_model_load (int16_t dev_id, struct rte_ml_model_params *params, uint16_t *model_id)
__rte_experimental int rte_ml_model_unload (int16_t dev_id, uint16_t model_id)
__rte_experimental int rte_ml_model_start (int16_t dev_id, uint16_t model_id)
__rte_experimental int rte_ml_model_stop (int16_t dev_id, uint16_t model_id)
__rte_experimental int rte_ml_model_info_get (int16_t dev_id, uint16_t model_id, struct rte_ml_model_info *model_info)
__rte_experimental int rte_ml_model_params_update (int16_t dev_id, uint16_t model_id, void *buffer)
__rte_experimental int rte_ml_io_quantize (int16_t dev_id, uint16_t model_id, struct rte_ml_buff_seg **dbuffer, struct rte_ml_buff_seg **qbuffer)
__rte_experimental int rte_ml_io_dequantize (int16_t dev_id, uint16_t model_id, struct rte_ml_buff_seg **qbuffer, struct rte_ml_buff_seg **dbuffer)
__rte_experimental struct rte_mempool * rte_ml_op_pool_create (const char *name, unsigned int nb_elts, unsigned int cache_size, uint16_t user_size, int socket_id)
__rte_experimental void rte_ml_op_pool_free (struct rte_mempool *mempool)

Detailed Description

Warning:

EXPERIMENTAL: All functions in this file may be changed or removed without prior notice.

ML (Machine Learning) device API.

The ML framework is built on the following model:

+-----------------+               rte_ml_[en|de]queue_burst()
|                 |                          |
|     Machine     o------+     +--------+    |
|     Learning    |      |     | queue  |    |    +------+
|     Inference   o------+-----o        |<===o===>|Core 0|
|     Engine      |      |     | pair 0 |         +------+
|                 o----+ |     +--------+
|                 |    | |
+-----------------+    | |     +--------+


         ^             | |     | queue  |         +------+


         |             | +-----o        |<=======>|Core 1|


         |             |       | pair 1 |         +------+


         |             |       +--------+
+--------+--------+    |
| +-------------+ |    |       +--------+
| |   Model 0   | |    |       | queue  |         +------+
| +-------------+ |    +-------o        |<=======>|Core N|
| +-------------+ |            | pair N |         +------+
| |   Model 1   | |            +--------+
| +-------------+ |
| +-------------+ |<------> rte_ml_model_load()
| |   Model ..  | |-------> rte_ml_model_info_get()
| +-------------+ |<------- rte_ml_model_start()
| +-------------+ |<------- rte_ml_model_stop()
| |   Model N   | |<------- rte_ml_model_params_update()
| +-------------+ |<------- rte_ml_model_unload()
+-----------------+

ML Device: A hardware or software-based implementation of ML device API for running inferences using a pre-trained ML model.

ML Model: An ML model is an algorithm trained over a dataset. A model consists of procedure/algorithm and data/pattern required to make predictions on live data. Once the model is created and trained outside of the DPDK scope, the model can be loaded via rte_ml_model_load() and then start it using rte_ml_model_start() API. The rte_ml_model_params_update() can be used to update the model parameters such as weight and bias without unloading the model using rte_ml_model_unload().

ML Inference: ML inference is the process of feeding data to the model via rte_ml_enqueue_burst() API and use rte_ml_dequeue_burst() API to get the calculated outputs/predictions from the started model.

In all functions of the ML device API, the ML device is designated by an integer >= 0 named as device identifier dev_id.

The functions exported by the ML device API to setup a device designated by its device identifier must be invoked in the following order:



 - rte_ml_dev_configure()


 - rte_ml_dev_queue_pair_setup()


 - rte_ml_dev_start()

A model is required to run the inference operations with the user specified inputs. Application needs to invoke the ML model API in the following order before queueing inference jobs.



 - rte_ml_model_load()


 - rte_ml_model_start()

A model can be loaded on a device only after the device has been configured and can be started or stopped only after a device has been started.

The rte_ml_model_info_get() API is provided to retrieve the information related to the model. The information would include the shape and type of input and output required for the inference.

Data quantization and dequantization is one of the main aspects in ML domain. This involves conversion of input data from a higher precision to a lower precision data type and vice-versa for the output. APIs are provided to enable quantization through rte_ml_io_quantize() and dequantization through rte_ml_io_dequantize(). These APIs have the capability to handle input and output buffers holding data for multiple batches.

Two utility APIs rte_ml_io_input_size_get() and rte_ml_io_output_size_get() can used to get the size of quantized and de-quantized multi-batch input and output buffers.

User can optionally update the model parameters with rte_ml_model_params_update() after invoking rte_ml_model_stop() API on a given model ID.

The application can invoke, in any order, the functions exported by the ML API to enqueue inference jobs and dequeue inference response.

If the application wants to change the device configuration (i.e., call rte_ml_dev_configure() or rte_ml_dev_queue_pair_setup()), then application must stop the device using rte_ml_dev_stop() API. Likewise, if model parameters need to be updated then the application must call rte_ml_model_stop() followed by rte_ml_model_params_update() API for the given model. The application does not need to call rte_ml_dev_stop() API for any model re-configuration such as rte_ml_model_params_update(), rte_ml_model_unload() etc.

Once the device is in the start state after invoking rte_ml_dev_start() API and the model is in start state after invoking rte_ml_model_start() API, then the application can call rte_ml_enqueue_burst() and rte_ml_dequeue_burst() API on the destined device and model ID.

Finally, an application can close an ML device by invoking the rte_ml_dev_close() function.

Typical application utilisation of the ML API will follow the following programming flow.

  • rte_ml_dev_configure()
  • rte_ml_dev_queue_pair_setup()
  • rte_ml_model_load()
  • rte_ml_dev_start()
  • rte_ml_model_start()
  • rte_ml_model_info_get()
  • rte_ml_enqueue_burst()
  • rte_ml_dequeue_burst()
  • rte_ml_model_stop()
  • rte_ml_model_unload()
  • rte_ml_dev_stop()
  • rte_ml_dev_close()

Regarding multi-threading, by default, all the functions of the ML Device API exported by a PMD are lock-free functions which assume to not be invoked in parallel on different logical cores on the same target object. For instance, the dequeue function of a poll mode driver cannot be invoked in parallel on two logical cores to operate on same queue pair. Of course, this function can be invoked in parallel by different logical core on different queue pair. It is the responsibility of the user application to enforce this rule.

Definition in file rte_mldev.h.

Macro Definition Documentation

#define RTE_ML_STR_MAX 128

Maximum length of name string

Definition at line 151 of file rte_mldev.h.

Typedef Documentation

typedef void(* rte_ml_dev_stop_flush_t) (int16_t dev_id, uint16_t qp_id, struct rte_ml_op *op)

Callback function called during rte_ml_dev_stop(), invoked once per flushed ML op

Definition at line 301 of file rte_mldev.h.

Enumeration Type Documentation

enum rte_ml_op_status

Status of ML operation

Enumerator

Operation completed successfully
Operation has not yet been processed by the device.
Operation completed with error. Application can invoke rte_ml_op_error_get() to get PMD specific error code if needed.

Definition at line 390 of file rte_mldev.h.

enum rte_ml_dev_xstats_mode

Selects the component of the mldev to retrieve statistics from.

Enumerator

Device xstats
Model xstats

Definition at line 618 of file rte_mldev.h.

enum rte_ml_io_type

Input and output data types. ML models can operate on reduced precision datatypes to achieve better power efficiency, lower network latency and lower memory footprint. This enum is used to represent the lower precision integer and floating point types used by ML models.

Enumerator

Invalid or unknown type
8-bit integer
8-bit unsigned integer
16-bit integer
16-bit unsigned integer
32-bit integer
32-bit unsigned integer
8-bit floating point number
IEEE 754 16-bit floating point number
IEEE 754 32-bit floating point number
16-bit brain floating point number.

Definition at line 861 of file rte_mldev.h.

enum rte_ml_io_layout

ML I/O buffer layout

Enumerator

All inputs for the model should packed in a single buffer with no padding between individual inputs. The buffer is expected to be aligned to rte_ml_dev_info::align_size.

When I/O segmentation is supported by the device, the packed data can be split into multiple segments. In this case, each segment is expected to be aligned to rte_ml_dev_info::align_size

Same applies to output.

See also:

struct rte_ml_dev_info::max_segments
Each input for the model should be stored as separate buffers and each input should be aligned to rte_ml_dev_info::align_size.

When I/O segmentation is supported, each input can be split into multiple segments. In this case, each segment is expected to be aligned to rte_ml_dev_info::align_size

Same applies to output.

See also:

struct rte_ml_dev_info::max_segments

Definition at line 887 of file rte_mldev.h.

Function Documentation

__rte_experimental int rte_ml_dev_init (size_t dev_max)

Maximum number of devices if rte_ml_dev_init() is not called.
Initialize the device array before probing devices. If not called, the first device probed would initialize the array to a size of RTE_MLDEV_DEFAULT_MAX.

Parameters:

dev_max Maximum number of devices.

Returns:

0 on success, -rte_errno otherwise:
  • ENOMEM if out of memory
  • EINVAL if 0 size
  • EBUSY if already initialized

__rte_experimental uint16_t rte_ml_dev_count (void)

Get the total number of ML devices that have been successfully initialised.

Returns:

•
The total number of usable ML devices.

__rte_experimental int rte_ml_dev_is_valid_dev (int16_t dev_id)

Check if the device is in ready state.

Parameters:

dev_id The identifier of the device.

Returns:

  • 0 if device state is not in ready state.
  • 1 if device state is ready state.

__rte_experimental int rte_ml_dev_socket_id (int16_t dev_id)

Return the NUMA socket to which a device is connected.

Parameters:

dev_id The identifier of the device.

Returns:

  • The NUMA socket id to which the device is connected
  • 0 If the socket could not be determined.
  • -EINVAL: if the dev_id value is not valid.

__rte_experimental int rte_ml_dev_info_get (int16_t dev_id, struct rte_ml_dev_info * dev_info)

Retrieve the information of the device.

Parameters:

dev_id The identifier of the device.
dev_info A pointer to a structure of type rte_ml_dev_info to be filled with the info of the device.

Returns:

  • 0: Success, driver updates the information of the ML device
  • < 0: Error code returned by the driver info get function.

__rte_experimental int rte_ml_dev_configure (int16_t dev_id, const struct rte_ml_dev_config * config)

Configure an ML device.

This function must be invoked first before any other function in the API.

ML Device can be re-configured, when in a stopped state. Device cannot be re-configured after rte_ml_dev_close() is called.

The caller may use rte_ml_dev_info_get() to get the capability of each resources available for this ML device.

Parameters:

dev_id The identifier of the device to configure.
config The ML device configuration structure.

Returns:

  • 0: Success, device configured.
  • < 0: Error code returned by the driver configuration function.

__rte_experimental int rte_ml_dev_queue_pair_setup (int16_t dev_id, uint16_t queue_pair_id, const struct rte_ml_dev_qp_conf * qp_conf, int socket_id)

Set up a queue pair for a device. This should only be called when the device is stopped.

Parameters:

dev_id The identifier of the device.
queue_pair_id The index of the queue pairs to set up. The value must be in the range [0, nb_queue_pairs - 1] previously supplied to rte_ml_dev_configure().
qp_conf The pointer to the configuration data to be used for the queue pair.
socket_id The socket_id argument is the socket identifier in case of NUMA. The value can be SOCKET_ID_ANY if there is no NUMA constraint for the memory allocated for the queue pair.

Returns:

  • 0: Success, queue pair correctly set up.
  • < 0: Queue pair configuration failed.

__rte_experimental int rte_ml_dev_start (int16_t dev_id)

Start an ML device.

The device start step consists of setting the configured features and enabling the ML device to accept inference jobs.

Parameters:

dev_id The identifier of the device.

Returns:

  • 0: Success, device started.
  • <0: Error code of the driver device start function.

__rte_experimental int rte_ml_dev_stop (int16_t dev_id)

Stop an ML device. A stopped device cannot accept inference jobs. The device can be restarted with a call to rte_ml_dev_start().

Parameters:

dev_id The identifier of the device.

Returns:

  • 0: Success, device stopped.
  • <0: Error code of the driver device stop function.

__rte_experimental int rte_ml_dev_close (int16_t dev_id)

Close an ML device. The device cannot be restarted!

Parameters:

dev_id The identifier of the device.

Returns:

  • 0 on successfully closing device.
  • <0 on failure to close device.

__rte_experimental uint16_t rte_ml_enqueue_burst (int16_t dev_id, uint16_t qp_id, struct rte_ml_op ** ops, uint16_t nb_ops)

Enqueue a burst of ML inferences for processing on an ML device.

The rte_ml_enqueue_burst() function is invoked to place ML inference operations on the queue qp_id of the device designated by its dev_id.

The nb_ops parameter is the number of inferences to process which are supplied in the ops array of rte_ml_op structures.

The rte_ml_enqueue_burst() function returns the number of inferences it actually enqueued for processing. A return value equal to nb_ops means that all packets have been enqueued.

Parameters:

dev_id The identifier of the device.
qp_id The index of the queue pair which inferences are to be enqueued for processing. The value must be in the range [0, nb_queue_pairs - 1] previously supplied to rte_ml_dev_configure.
ops The address of an array of nb_ops pointers to rte_ml_op structures which contain the ML inferences to be processed.
nb_ops The number of operations to process.

Returns:

The number of inference operations actually enqueued to the ML device. The return value can be less than the value of the nb_ops parameter when the ML device queue is full or if invalid parameters are specified in a rte_ml_op.

__rte_experimental uint16_t rte_ml_dequeue_burst (int16_t dev_id, uint16_t qp_id, struct rte_ml_op ** ops, uint16_t nb_ops)

Dequeue a burst of processed ML inferences operations from a queue on the ML device. The dequeued operations are stored in rte_ml_op structures whose pointers are supplied in the ops array.

The rte_ml_dequeue_burst() function returns the number of inferences actually dequeued, which is the number of rte_ml_op data structures effectively supplied into the ops array.

A return value equal to nb_ops indicates that the queue contained at least nb_ops* operations, and this is likely to signify that other processed operations remain in the devices output queue. Application implementing a 'retrieve as many processed operations as possible' policy can check this specific case and keep invoking the rte_ml_dequeue_burst() function until a value less than nb_ops is returned.

The rte_ml_dequeue_burst() function does not provide any error notification to avoid the corresponding overhead.

Parameters:

dev_id The identifier of the device.
qp_id The index of the queue pair from which to retrieve processed packets. The value must be in the range [0, nb_queue_pairs - 1] previously supplied to rte_ml_dev_configure().
ops The address of an array of pointers to rte_ml_op structures that must be large enough to store nb_ops pointers in it.
nb_ops The maximum number of inferences to dequeue.

Returns:

The number of operations actually dequeued, which is the number of pointers to rte_ml_op structures effectively supplied to the ops array.

__rte_experimental int rte_ml_op_error_get (int16_t dev_id, struct rte_ml_op * op, struct rte_ml_op_error * error)

Get PMD specific error information for an ML op.

When an ML operation completed with RTE_ML_OP_STATUS_ERROR as status, This API allows to get PMD specific error details.

Parameters:

dev_id Device identifier
op Handle of ML operation
error Address of structure rte_ml_op_error to be filled

Returns:

  • Returns 0 on success
  • Returns negative value on failure

__rte_experimental int rte_ml_dev_stats_get (int16_t dev_id, struct rte_ml_dev_stats * stats)

Retrieve the general I/O statistics of a device.

Parameters:

dev_id The identifier of the device.
stats Pointer to structure to where statistics will be copied. On error, this location may or may not have been modified.

Returns:

  • 0 on success
  • -EINVAL: If invalid parameter pointer is provided.

__rte_experimental void rte_ml_dev_stats_reset (int16_t dev_id)

Reset the statistics of a device.

Parameters:

dev_id The identifier of the device.

__rte_experimental int rte_ml_dev_xstats_names_get (int16_t dev_id, enum rte_ml_dev_xstats_mode mode, int32_t model_id, struct rte_ml_dev_xstats_map * xstats_map, uint32_t size)

Retrieve names of extended statistics of an ML device.

Parameters:

dev_id The identifier of the device.
mode Mode of statistics to retrieve. Choices include the device statistics and model statistics.
model_id Used to specify the model number in model mode, and is ignored in device mode.
xstats_map Block of memory to insert names and ids into. Must be at least size in capacity. If set to NULL, function returns required capacity. The id values returned can be passed to rte_ml_dev_xstats_get to select statistics.
size Capacity of xstats_names (number of xstats_map).

Returns:

  • Positive value lower or equal to size: success. The return value is the number of entries filled in the stats table.
  • Positive value higher than size: error, the given statistics table is too small. The return value corresponds to the size that should be given to succeed. The entries in the table are not valid and shall not be used by the caller.
  • Negative value on error: -ENODEV for invalid dev_id. -EINVAL for invalid mode, model parameters. -ENOTSUP if the device doesn't support this function.

__rte_experimental int rte_ml_dev_xstats_by_name_get (int16_t dev_id, const char * name, uint16_t * stat_id, uint64_t * value)

Retrieve the value of a single stat by requesting it by name.

Parameters:

dev_id The identifier of the device.
name Name of stat name to retrieve.
stat_id If non-NULL, the numerical id of the stat will be returned, so that further requests for the stat can be got using rte_ml_dev_xstats_get, which will be faster as it doesn't need to scan a list of names for the stat. If the stat cannot be found, the id returned will be (unsigned)-1.
value Value of the stat to be returned.

Returns:

  • Zero: No error.
  • Negative value: -EINVAL if stat not found, -ENOTSUP if not supported.

__rte_experimental int rte_ml_dev_xstats_get (int16_t dev_id, enum rte_ml_dev_xstats_mode mode, int32_t model_id, const uint16_t stat_ids[], uint64_t values[], uint16_t nb_ids)

Retrieve extended statistics of an ML device.

Parameters:

dev_id The identifier of the device.
mode Mode of statistics to retrieve. Choices include the device statistics and model statistics.
model_id Used to specify the model id in model mode, and is ignored in device mode.
stat_ids ID numbers of the stats to get. The ids can be got from the stat position in the stat list from rte_ml_dev_xstats_names_get(), or by using rte_ml_dev_xstats_by_name_get().
values Values for each stats request by ID.
nb_ids Number of stats requested.

Returns:

  • Positive value: number of stat entries filled into the values array
  • Negative value on error: -ENODEV for invalid dev_id. -EINVAL for invalid mode, model id or stat id parameters. -ENOTSUP if the device doesn't support this function.

__rte_experimental int rte_ml_dev_xstats_reset (int16_t dev_id, enum rte_ml_dev_xstats_mode mode, int32_t model_id, const uint16_t stat_ids[], uint16_t nb_ids)

Reset the values of the xstats of the selected component in the device.

Parameters:

dev_id The identifier of the device.
mode Mode of the statistics to reset. Choose from device or model.
model_id Model stats to reset. 0 and positive values select models, while -1 indicates all models.
stat_ids Selects specific statistics to be reset. When NULL, all statistics selected by mode will be reset. If non-NULL, must point to array of at least nb_ids size.
nb_ids The number of ids available from the ids array. Ignored when ids is NULL.

Returns:

  • Zero: successfully reset the statistics.
  • Negative value: -EINVAL invalid parameters, -ENOTSUP if not supported.

__rte_experimental int rte_ml_dev_dump (int16_t dev_id, FILE * fd)

Dump internal information about dev_id to the FILE* provided in fd.

Parameters:

dev_id The identifier of the device.
fd A pointer to a file for output.

Returns:

  • 0: on success.
  • <0: on failure.

__rte_experimental int rte_ml_dev_selftest (int16_t dev_id)

Trigger the ML device self test.

Parameters:

dev_id The identifier of the device.

Returns:

  • 0: Selftest successful.
  • -ENOTSUP: if the device doesn't support selftest.
  • other values < 0 on failure.

__rte_experimental int rte_ml_model_load (int16_t dev_id, struct rte_ml_model_params * params, uint16_t * model_id)

Load an ML model to the device.

Load an ML model to the device with parameters requested in the structure rte_ml_model_params.

Parameters:

dev_id The identifier of the device.
params Parameters for the model to be loaded.
model_id Identifier of the model loaded.

Returns:

  • 0: Success, Model loaded.
  • < 0: Failure, Error code of the model load driver function.

__rte_experimental int rte_ml_model_unload (int16_t dev_id, uint16_t model_id)

Unload an ML model from the device.

Parameters:

dev_id The identifier of the device.
model_id Identifier of the model to be unloaded.

Returns:

  • 0: Success, Model unloaded.
  • < 0: Failure, Error code of the model unload driver function.

__rte_experimental int rte_ml_model_start (int16_t dev_id, uint16_t model_id)

Start an ML model for the given device ID.

Start an ML model to accept inference requests.

Parameters:

dev_id The identifier of the device.
model_id Identifier of the model to be started.

Returns:

  • 0: Success, Model loaded.
  • < 0: Failure, Error code of the model start driver function.

__rte_experimental int rte_ml_model_stop (int16_t dev_id, uint16_t model_id)

Stop an ML model for the given device ID.

Model stop would disable the ML model to be used for inference jobs. All inference jobs must have been completed before model stop is attempted.

Parameters:

dev_id The identifier of the device.
model_id Identifier of the model to be stopped.

Returns:

  • 0: Success, Model unloaded.
  • < 0: Failure, Error code of the model stop driver function.

__rte_experimental int rte_ml_model_info_get (int16_t dev_id, uint16_t model_id, struct rte_ml_model_info * model_info)

Get ML model information.

Parameters:

dev_id The identifier of the device.
model_id Identifier for the model created
model_info Pointer to a model info structure

Returns:

  • Returns 0 on success
  • Returns negative value on failure

__rte_experimental int rte_ml_model_params_update (int16_t dev_id, uint16_t model_id, void * buffer)

Update the model parameters without unloading model.

Update model parameters such as weights and bias without unloading the model. rte_ml_model_stop() must be called before invoking this API.

Parameters:

dev_id The identifier of the device.
model_id Identifier for the model created
buffer Pointer to the model weights and bias buffer. Size of the buffer is equal to wb_size returned in rte_ml_model_info.

Returns:

  • Returns 0 on success
  • Returns negative value on failure

__rte_experimental int rte_ml_io_quantize (int16_t dev_id, uint16_t model_id, struct rte_ml_buff_seg ** dbuffer, struct rte_ml_buff_seg ** qbuffer)

Quantize input data.

Quantization converts data from a higher precision types to a lower precision types to improve the throughput and efficiency of the model execution with minimal loss of accuracy. Types of dequantized data and quantized data are specified by the model.

Parameters:

dev_id The identifier of the device.
model_id Identifier for the model
dbuffer Address of dequantized input data
qbuffer Address of quantized input data

Returns:

  • Returns 0 on success
  • Returns negative value on failure

__rte_experimental int rte_ml_io_dequantize (int16_t dev_id, uint16_t model_id, struct rte_ml_buff_seg ** qbuffer, struct rte_ml_buff_seg ** dbuffer)

Dequantize output data.

Dequantization converts data from a lower precision type to a higher precision type. Types of quantized data and dequantized are specified by the model.

Parameters:

dev_id The identifier of the device.
model_id Identifier for the model
qbuffer Address of quantized output data
dbuffer Address of dequantized output data

Returns:

  • Returns 0 on success
  • Returns negative value on failure

__rte_experimental struct rte_mempool* rte_ml_op_pool_create (const char * name, unsigned int nb_elts, unsigned int cache_size, uint16_t user_size, int socket_id)

Create an ML operation pool

Parameters:

name ML operations pool name
nb_elts Number of elements in pool
cache_size Number of elements to cache on lcore, see rte_mempool_create for further details about cache size
user_size Size of private data to allocate for user with each operation
socket_id Socket to identifier allocate memory on

Returns:

  • On success pointer to mempool
  • On failure NULL

__rte_experimental void rte_ml_op_pool_free (struct rte_mempool * mempool)

Free an ML operation pool

Parameters:

mempool A pointer to the mempool structure. If NULL then, the function does nothing.

Author

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Thu May 23 2024 Version 23.11.0