tvm.autotvm

目录

tvm.autotvm#

The auto-tuning module of tvm

This module includes:

  • Tuning space definition API

  • Efficient auto-tuners

  • Tuning result and database support

  • Distributed measurement to scale up tuning

tvm.autotvm.apply_history_best(records: None | str | bytes | Path | TextIOBase | Iterable[Tuple[MeasureInput, MeasureResult]] | Iterable[str | bytes | Path | TextIOBase | Iterable[Tuple[MeasureInput, MeasureResult]]])#

Apply the history best config

参数:

records (None, Records, or iterator of Records objects, where a) --

Records object is a path-like object, a file-like object,

or an iterator of (MeasureInput, MeasureResult).

Collection of tuning records. If multiple Records objects are passed, their contents will be merged.

tvm.autotvm.measure#

User facing API for specifying how to measure the generated code

class tvm.autotvm.measure.MeasureInput(target, task, config)[源代码]#

Stores all the necessary inputs for a measurement.

参数:
class tvm.autotvm.measure.MeasureResult(costs, error_no, all_cost, timestamp)[源代码]#

Stores all the results of a measurement

参数:

  • costs (Array of float or Array of Exception) -- If no error occurs during measurement, it is an array of measured running times. If an error occurs during measurement, it is an array of the exception objections.

  • error_no (int) -- Denote error type, defined by MeasureErrorNo

  • all_cost (float) -- All cost of this measure, including rpc, compilation, test runs

  • timestamp (float) -- The absolute time stamp when we finish measurement.

tvm.autotvm.measure.measure_option(builder, runner)[源代码]#

Set options for measure. To measure a config, we will build it and run it. So we have to set options for these two steps. They have their own options on timeout, parallel, etc.

参数:

  • builder (Builder) -- Specify how to build programs

  • runner (Runner) -- Specify how to run programs

示例

# example setting for using local devices >>> measure_option = autotvm.measure_option( >>> builder=autotvm.LocalBuilder(), # use all local cpu cores for compilation >>> runner=autotvm.LocalRunner( # measure them sequentially >>> number=10, >>> timeout=5) >>> )

# example setting for using remote devices >>> measure_option = autotvm.measure_option( >>> builder=autotvm.LocalBuilder(), # use all local cpu cores for compilation >>> runner=autotvm.RPCRunner( >>> 'rasp3b', 'locahost', 9190, # device key, host and port of the rpc tracker >>> number=4, >>> timeout=4) # timeout of a run on the device. RPC request waiting time is excluded. >>>)

备注

To make measurement results accurate, you should pick the correct value for the argument number and repeat in Runner(). Some devices need a certain minimum running time to "warm up," such as GPUs that need time to reach a performance power state. Using min_repeat_ms can dynamically adjusts number, so it is recommended. The typical value for NVIDIA GPU is 150 ms.

tvm.autotvm.measure.create_measure_batch(task, option)[源代码]#

Get a standard measure_batch function.

参数:

  • task (tvm.autotvm.task.Task) -- The tuning task

  • option (dict) -- The option for measuring generated code. You should use the return value of function measure_option for this argument.

返回:

measure_batch -- a callback function to measure a batch of configs

返回类型:

callable

class tvm.autotvm.measure.measure_methods.LocalBuilder(timeout=10, n_parallel=None, build_kwargs=None, build_func='default', do_fork=False, runtime=None)[源代码]#

Run compilation on local machine

参数:

  • timeout (float) -- The timeout of a compilation

  • n_parallel (int) -- The number of tasks run in parallel. "None" will use all cpu cores

  • build_kwargs (dict) -- If supplied, additional kwargs passed to build_func. Overrides any build_kwargs supplied by the Runner.

  • build_func (callable or str) -- If is 'default', use default build function If is 'ndk', use function for android ndk If id 'stackvm', use function for stackvm If is callable, use it as custom build function, expect lib_format field.

  • do_fork (bool) -- If False, do not fork when building. Requires n_parallel=1.

  • runtime (Optional[Runtime]) -- Specify the runtime to generate artifacts for

class tvm.autotvm.measure.measure_methods.RPCRunner(key, host, port, priority=1, timeout=10, n_parallel=None, number=4, repeat=3, min_repeat_ms=0, cooldown_interval=0.1, enable_cpu_cache_flush=False, module_loader=None)[源代码]#

Run generated code on remove devices. This function will ask a RPC Tracker to get device for measurement.

参数:

  • timeout (float) -- The timeout of a RPCRunner measurement task

  • n_parallel (int) -- The number of tasks run in parallel. "None" will use all cpu cores

  • key (str) -- The key of the device registered in the tracker

  • host (str) -- The host address of RPC Tracker

  • port (int) -- The port of RPC Tracker

  • number (int) -- The number of times to run the generated code for taking average. We call these runs as one repeat of measurement.

  • repeat (int, optional) -- The number of times to repeat the measurement. In total, the generated code will be run (1 + number x repeat) times, where the first "1" is warm up and will be discarded. The returned result contains repeat costs, each of which is an average of number costs.

  • min_repeat_ms (int, optional) -- The minimum duration of one repeat in milliseconds. By default, one repeat contains number runs. If this parameter is set, the parameters number will be dynamically adjusted to meet the minimum duration requirement of one repeat. i.e., When the run time of one repeat falls below this time, the number parameter will be automatically increased.

  • cooldown_interval (float, optional) -- The cool down interval between two measurements.

  • enable_cpu_cache_flush (bool) -- Whether to flush cache on CPU between repeated measurements. Flushing cache can make the measured latency of one operator closer to its actual latency during end-to-end inference. To make this option effective, the argument number should also be set to 1. This is only has effect on CPU task.

  • module_loader (ModuleLoader) -- If given, a context manager that loads the module to be timed into the remote runtime. If not given, default_module_loader is used.

class tvm.autotvm.measure.measure_methods.LocalRunner(timeout=10, number=4, repeat=3, min_repeat_ms=0, cooldown_interval=0.1, enable_cpu_cache_flush=False, module_loader=None)[源代码]#

Run generated code on local devices.

参数:

  • timeout (float) -- The timeout of a compilation

  • number (int) -- The number of times to run the generated code for taking average. We call these runs as one repeat of measurement.

  • repeat (int, optional) -- The number of times to repeat the measurement. In total, the generated code will be run (1 + number x repeat) times, where the first one is warm up and will be discarded. The returned result contains repeat costs, each of which is an average of number costs.

  • min_repeat_ms (int, optional) -- The minimum duration of one repeat in milliseconds. By default, one repeat contains number runs. If this parameter is set, the parameters number will be dynamically adjusted to meet the minimum duration requirement of one repeat. i.e., When the run time of one repeat falls below this time, the number parameter will be automatically increased.

  • cooldown_interval (float, optional) -- The cool down interval between two measurements.

  • enable_cpu_cache_flush (bool) -- Whether to flush cache on CPU between repeated measurements. Flushing cache can make the measured latency of one operator closer to its actual latency during end-to-end inference. To make this option effective, the argument number should also be set to 1. This is only has effect on CPU task.

备注

This is a "fake" local mode. We start a silent rpc tracker and rpc server for the user. In this way we reuse timeout/isolation mechanism in RPC infrastructure.

tvm.autotvm.tuner#

A tuner takes a task as input. It proposes some promising ConfigEntity in the ConfigSpace and measure them on the real hardware. Then it proposed the next batch of ConfigEntity according to the measure results. This tuning loop is repeated.

class tvm.autotvm.tuner.Tuner(task, **kwargs)[源代码]#

Base class for tuners

参数:

task (autotvm.task.Task) -- Tuning Task

has_next()[源代码]#

Whether has next untried config in the space

返回:

has_next

返回类型:

bool

load_history(data_set, min_seed_records=500)[源代码]#

load history data for transfer learning

参数:

  • data_set (Array of (autotvm.measure.MeasureInput, autotvm.measure.MeasureResult) pair) -- Previous tuning records

  • min_seed_records (int) -- Defaults to 500. Indicates the minimum number of records to train the tuner with. If there are less than min_seed_records number of records in data_set, no training of the tuner will be done.

next_batch(batch_size)[源代码]#

get the next batch of configs to be measure on real hardware

参数:

batch_size (int) -- The size of the batch

返回类型:

a batch of configs

reset()[源代码]#

reset the status of tuner

set_error_threshold(threshold)[源代码]#

Modify error counter threshold, which controls switch to debug mode

参数:

threshold (New threshold value)

tune(n_trial, measure_option, early_stopping=None, callbacks=(), si_prefix='G')[源代码]#

Begin tuning

参数:

  • n_trial (int) -- Maximum number of configs to try (measure on real hardware)

  • measure_option (dict) -- The options for how to measure generated code. You should use the return value ot autotvm.measure_option for this argument.

  • early_stopping (int, optional) -- Early stop the tuning when not finding better configs in this number of trials

  • callbacks (List of callable) -- A list of callback functions. The signature of callback function is (Tuner, List of MeasureInput, List of MeasureResult) with no return value. These callback functions will be called on every measurement pair. See autotvm/tuner/callback.py for some examples.

  • si_prefix (str) -- One of tvm.autotvm.utils.SI_PREFIXES. The SI prefix to use when reporting FLOPS.

update(inputs, results)[源代码]#

Update parameters of the tuner according to measurement results

参数:
class tvm.autotvm.tuner.RandomTuner(task, range_idx=None)[源代码]#

Enumerate the search space in a random order

参数:

  • task (autotvm.task.Task) -- Tuning Task

  • range_idx (Optional[Tuple[int, int]]) -- A tuple of index range to random

has_next()#

Whether has next untried config in the space

返回:

has_next

返回类型:

bool

load_history(data_set, min_seed_records=500)#

load history data for transfer learning

参数:

  • data_set (Array of (autotvm.measure.MeasureInput, autotvm.measure.MeasureResult) pair) -- Previous tuning records

  • min_seed_records (int) -- Defaults to 500. Indicates the minimum number of records to train the tuner with. If there are less than min_seed_records number of records in data_set, no training of the tuner will be done.

next_batch(batch_size)[源代码]#

get the next batch of configs to be measure on real hardware

参数:

batch_size (int) -- The size of the batch

返回类型:

a batch of configs

reset()#

reset the status of tuner

set_error_threshold(threshold)#

Modify error counter threshold, which controls switch to debug mode

参数:

threshold (New threshold value)

tune(n_trial, measure_option, early_stopping=None, callbacks=(), si_prefix='G')#

Begin tuning

参数:

  • n_trial (int) -- Maximum number of configs to try (measure on real hardware)

  • measure_option (dict) -- The options for how to measure generated code. You should use the return value ot autotvm.measure_option for this argument.

  • early_stopping (int, optional) -- Early stop the tuning when not finding better configs in this number of trials

  • callbacks (List of callable) -- A list of callback functions. The signature of callback function is (Tuner, List of MeasureInput, List of MeasureResult) with no return value. These callback functions will be called on every measurement pair. See autotvm/tuner/callback.py for some examples.

  • si_prefix (str) -- One of tvm.autotvm.utils.SI_PREFIXES. The SI prefix to use when reporting FLOPS.

update(inputs, results)#

Update parameters of the tuner according to measurement results

参数:
class tvm.autotvm.tuner.GridSearchTuner(task, range_idx=None)[源代码]#

Enumerate the search space in a grid search order

has_next()#

Whether has next untried config in the space

返回:

has_next

返回类型:

bool

load_history(data_set, min_seed_records=500)#

load history data for transfer learning

参数:

  • data_set (Array of (autotvm.measure.MeasureInput, autotvm.measure.MeasureResult) pair) -- Previous tuning records

  • min_seed_records (int) -- Defaults to 500. Indicates the minimum number of records to train the tuner with. If there are less than min_seed_records number of records in data_set, no training of the tuner will be done.

next_batch(batch_size)[源代码]#

get the next batch of configs to be measure on real hardware

参数:

batch_size (int) -- The size of the batch

返回类型:

a batch of configs

reset()#

reset the status of tuner

set_error_threshold(threshold)#

Modify error counter threshold, which controls switch to debug mode

参数:

threshold (New threshold value)

tune(n_trial, measure_option, early_stopping=None, callbacks=(), si_prefix='G')#

Begin tuning

参数:

  • n_trial (int) -- Maximum number of configs to try (measure on real hardware)

  • measure_option (dict) -- The options for how to measure generated code. You should use the return value ot autotvm.measure_option for this argument.

  • early_stopping (int, optional) -- Early stop the tuning when not finding better configs in this number of trials

  • callbacks (List of callable) -- A list of callback functions. The signature of callback function is (Tuner, List of MeasureInput, List of MeasureResult) with no return value. These callback functions will be called on every measurement pair. See autotvm/tuner/callback.py for some examples.

  • si_prefix (str) -- One of tvm.autotvm.utils.SI_PREFIXES. The SI prefix to use when reporting FLOPS.

update(inputs, results)#

Update parameters of the tuner according to measurement results

参数:
class tvm.autotvm.tuner.GATuner(task, pop_size=100, elite_num=3, mutation_prob=0.1)[源代码]#

Tuner with genetic algorithm. This tuner does not have a cost model so it always run measurement on real machines. This tuner expands the ConfigEntity as gene.

参数:

  • pop_size (int) -- number of genes in one generation

  • elite_num (int) -- number of elite to keep

  • mutation_prob (float) -- probability of mutation of a knob in a gene

has_next()[源代码]#

Whether has next untried config in the space

返回:

has_next

返回类型:

bool

load_history(data_set, min_seed_records=500)[源代码]#

load history data for transfer learning

参数:

  • data_set (Array of (autotvm.measure.MeasureInput, autotvm.measure.MeasureResult) pair) -- Previous tuning records

  • min_seed_records (int) -- Defaults to 500. Indicates the minimum number of records to train the tuner with. If there are less than min_seed_records number of records in data_set, no training of the tuner will be done.

next_batch(batch_size)[源代码]#

get the next batch of configs to be measure on real hardware

参数:

batch_size (int) -- The size of the batch

返回类型:

a batch of configs

reset()#

reset the status of tuner

set_error_threshold(threshold)#

Modify error counter threshold, which controls switch to debug mode

参数:

threshold (New threshold value)

tune(n_trial, measure_option, early_stopping=None, callbacks=(), si_prefix='G')#

Begin tuning

参数:

  • n_trial (int) -- Maximum number of configs to try (measure on real hardware)

  • measure_option (dict) -- The options for how to measure generated code. You should use the return value ot autotvm.measure_option for this argument.

  • early_stopping (int, optional) -- Early stop the tuning when not finding better configs in this number of trials

  • callbacks (List of callable) -- A list of callback functions. The signature of callback function is (Tuner, List of MeasureInput, List of MeasureResult) with no return value. These callback functions will be called on every measurement pair. See autotvm/tuner/callback.py for some examples.

  • si_prefix (str) -- One of tvm.autotvm.utils.SI_PREFIXES. The SI prefix to use when reporting FLOPS.

update(inputs, results)[源代码]#

Update parameters of the tuner according to measurement results

参数:
class tvm.autotvm.tuner.XGBTuner(task, plan_size=64, feature_type='itervar', loss_type='reg', num_threads=None, optimizer='sa', diversity_filter_ratio=None, log_interval=50)[源代码]#

Tuner that uses xgboost as cost model

参数:

  • task (Task) -- The tuning task

  • plan_size (int) -- The size of a plan. After plan_size trials, the tuner will refit a new cost model and do planing for the next plan_size trials.

  • feature_type (str, optional) --

    If is 'itervar', use features extracted from IterVar (loop variable). If is 'knob', use flatten ConfigEntity directly. If is 'curve', use sampled curve feature (relation feature).

    Note on choosing feature type: For single task tuning, 'itervar' and 'knob' are good. 'itervar' is more accurate but 'knob' is much faster. There are some constraints on 'itervar', if you meet problems with feature extraction when using 'itervar', you can switch to 'knob'.

    For cross-shape tuning (e.g. many convolutions with different shapes), 'itervar' and 'curve' has better transferability, 'knob' is faster.

    For cross-device or cross-operator tuning, you can use 'curve' only.

  • loss_type (str) -- If is 'reg', use regression loss to train cost model. The cost model predicts the normalized flops. If is 'rank', use pairwise rank loss to train cost model. The cost model predicts relative rank score. If is 'rank-binary', use pairwise rank loss with binarized labels to train cost model. The cost model predicts relative rank score.

  • num_threads (int, optional) -- The number of threads.

  • optimizer (str or ModelOptimizer, optional) -- If is 'sa', use a default simulated annealing optimizer. Otherwise it should be a ModelOptimizer object.

  • diversity_filter_ratio (int or float, optional) -- If is not None, the tuner will first select top-(plan_size * diversity_filter_ratio) candidates according to the cost model and then pick batch_size of them according to the diversity metric.

  • log_interval (int = 50) -- The verbose level. If is 0, output nothing. Otherwise, output debug information every verbose iterations.

has_next()#

Whether has next untried config in the space

返回:

has_next

返回类型:

bool

load_history(data_set, min_seed_records=500)#

load history data for transfer learning

参数:

  • data_set (Array of (autotvm.measure.MeasureInput, autotvm.measure.MeasureResult) pair) -- Previous tuning records

  • min_seed_records (int) -- Defaults to 500. Indicates the minimum number of records to train the tuner with. If there are less than min_seed_records number of records in data_set, no training of the tuner will be done.

next_batch(batch_size)#

get the next batch of configs to be measure on real hardware

参数:

batch_size (int) -- The size of the batch

返回类型:

a batch of configs

reset()#

reset the status of tuner

set_error_threshold(threshold)#

Modify error counter threshold, which controls switch to debug mode

参数:

threshold (New threshold value)

tune(*args, **kwargs)[源代码]#

Begin tuning

参数:

  • n_trial (int) -- Maximum number of configs to try (measure on real hardware)

  • measure_option (dict) -- The options for how to measure generated code. You should use the return value ot autotvm.measure_option for this argument.

  • early_stopping (int, optional) -- Early stop the tuning when not finding better configs in this number of trials

  • callbacks (List of callable) -- A list of callback functions. The signature of callback function is (Tuner, List of MeasureInput, List of MeasureResult) with no return value. These callback functions will be called on every measurement pair. See autotvm/tuner/callback.py for some examples.

  • si_prefix (str) -- One of tvm.autotvm.utils.SI_PREFIXES. The SI prefix to use when reporting FLOPS.

update(inputs, results)#

Update parameters of the tuner according to measurement results

参数:

Namespace of callback utilities of AutoTVM

class tvm.autotvm.tuner.callback.Monitor[源代码]#

A monitor to collect statistic during tuning

trial_scores()[源代码]#

get scores (currently is flops) of all trials

trial_timestamps()[源代码]#

get wall clock time stamp of all trials

tvm.autotvm.tuner.callback.log_to_database(db)[源代码]#

Save the tuning records to a database object.

参数:

db (Database) -- The database

tvm.autotvm.tuner.callback.log_to_file(file_out, protocol='json')[源代码]#

Log the tuning records into file. The rows of the log are stored in the format of autotvm.record.encode.

参数:

  • file_out (File or str) -- The file to log to.

  • protocol (str, optional) -- The log protocol. Can be 'json' or 'pickle'

返回:

callback -- Callback function to do the logging.

返回类型:

callable

tvm.autotvm.tuner.callback.progress_bar(total, prefix='', si_prefix='G')[源代码]#

Display progress bar for tuning

参数:

  • total (int) -- The total number of trials

  • prefix (str) -- The prefix of output message

  • si_prefix (str) -- SI prefix for flops

tvm.autotvm.task#

Task is a tunable composition of template functions.

Tuner takes a tunable task and optimizes the joint configuration space of all the template functions in the task. This module defines the task data structure, as well as a collection(zoo) of typical tasks of interest.

Definition of task function.

Task can be constructed from tuple of func, args, and kwargs. func is a state-less function, or a string that registers the standard task.

exception tvm.autotvm.task.task.FlopCalculationError[源代码]#

Error happens when estimating FLOP for a compute op

class tvm.autotvm.task.task.MissingTask(taskname: str)[源代码]#

Dummy task template for a task lookup which cannot be resolved. This can occur if the task being requested from _lookup_task() has not been imported in this run.

class tvm.autotvm.task.task.Task(name, args)[源代码]#

A Tunable Task

参数:

  • name (str) -- The name of the task.

  • args (Tuple) -- Positional argument of func

instantiate(config)[源代码]#

Instantiate this task function (template) with a config. Returns corresponding schedule.

参数:

config (template.ConfigEntity) -- parameter config for this template

返回:

  • sch (tvm.te.schedule.Schedule) -- The tvm schedule

  • arg_bufs (Array of te.tensor.Tensor) -- The input/output buffers

class tvm.autotvm.task.task.TaskTemplate[源代码]#

Task template is used to creates a tunable AutoTVM task.

It can be defined by a pair of compute and schedule function using _register_task_compute and _register_task_schedule, or by a customized task creation function that is more flexible using _register_customized_task.

Note that when customized func is registered, compute and schedule function will be ignored

tvm.autotvm.task.task.args_to_workload(args, task_name=None)[源代码]#

Convert argument list to hashable workload tuple. This function will convert list to tuple, tvm node to python value and flatten te.tensor.Tensor to a tuple

参数:

  • task_name (str) -- The AutoTVM task name

  • args (list of args) -- The arguments to the function

返回:

ret -- The hashable value

返回类型:

hashable

tvm.autotvm.task.task.compute_flop(sch)[源代码]#

Calculate number of FLOP (floating number operations) of the compute ops in a schedule

参数:

sch (tvm.te.schedule.Schedule) -- schedule

返回:

flop -- number of FLOP in this schedule

返回类型:

int

tvm.autotvm.task.task.create(task_name, args, target, target_host=None)[源代码]#

Create a tuning task and initialize its search space

参数:

  • task_name (str) -- The AutoTVM task name

  • args (List) -- Positional arguments

  • target (Target) -- The compilation target

  • target_host (Target, optional) -- The compilation target for host side

返回:

tsk -- a task object

返回类型:

Task

tvm.autotvm.task.task.deserialize_args(args)[源代码]#

The inverse function of serialize_args.

参数:

args (list of hashable or Tensor)

tvm.autotvm.task.task.get_config()[源代码]#

Get current config object

返回:

cfg -- The current config

返回类型:

ConfigSpace or ConfigEntity

tvm.autotvm.task.task.serialize_args(args)[源代码]#

serialize arguments of a topi function to a hashable tuple.

参数:

args (list of hashable or Tensor)

tvm.autotvm.task.task.template(task_name, func=None)[源代码]#

Decorate a function as a tunable schedule template.

参数:

  • task_name (str) -- The task name

  • func (None or callable) -- A callable template function. If it is None, return a decorator. If is callable, decorate this function.

返回:

func -- The decorated function

返回类型:

callable

示例

The following code is a tunable template for a blocked matrix multiplication

@autotvm.template("matmul")
def matmul(N, L, M, dtype):
    A = te.placeholder((N, L), name='A', dtype=dtype)
    B = te.placeholder((L, M), name='B', dtype=dtype)

    k = te.reduce_axis((0, L), name='k')
    C = te.compute((N, M), lambda i, j: te.sum(A[i, k] * B[k, j], axis=k), name='C')
    s = te.create_schedule(C.op)

    # schedule
    y, x = s[C].op.axis
    k = s[C].op.reduce_axis[0]

    ##### define space begin #####
    cfg = autotvm.get_config()
    cfg.define_split("tile_y", y, num_outputs=2)
    cfg.define_split("tile_x", x, num_outputs=2)
    ##### define space end #####

    # schedule according to config
    yo, yi = cfg["tile_y"].apply(s, C, y)
    xo, xi = cfg["tile_x"].apply(s, C, x)

    s[C].reorder(yo, xo, k, yi, xi)

    return s, [A, B, C]

Template configuration space.

Each template function can be parameterized by a ConfigSpace. The space is declared when we invoke the template function with ConfigSpace. During evaluation, we pass in a ConfigEntity, which contains a specific entity in the space. This entity contains deterministic parameters.

class tvm.autotvm.task.space.AnnotateEntity(anns)[源代码]#

An annotation operation with detailed parameters that can apply to axes

参数:

anns (Array of string) -- The annotations of axes

apply(sch, op, axes, axis_lens=None, max_unroll=None, vec_size=None, cfg=None, source=None)[源代码]#

Apply annotation to an array of axes

参数:

  • sch (tvm.te.schedule.Schedule) -- The tvm schedule

  • op (tvm.te.Operation) -- The stage to be applied

  • axes (Array of tvm.te.schedule.IterVar) -- axis to split

  • axis_lens (Array of int, optional) -- the length of axes

  • max_unroll (int, optional) -- maximum unroll step

  • vec_size (Array of int, optional) -- valid vector lanes for vectorization

  • cfg (ConfigEntity, optional) -- cfg for recording error

  • source (Array of Array tensor, optional) -- source tensor for attaching cache

返回:

axes -- The transformed axes

返回类型:

list of tvm.te.schedule.IterVar

class tvm.autotvm.task.space.AnnotateSpace(axes, policy, **kwargs)[源代码]#

The parameter space for annotating an array of axes

static get_num_output(axes, policy, **kwargs)[源代码]#

get number of output axes after this transform

返回:

n -- number of output axes

返回类型:

int

class tvm.autotvm.task.space.Axis(space, index)#
index#

Alias for field number 1

space#

Alias for field number 0

class tvm.autotvm.task.space.ConfigEntity(index, code_hash, entity_map, constraints)[源代码]#

A configuration with detailed parameters

参数:

  • index (int) -- index of this config in space

  • code_hash (str) -- hash of schedule code

  • entity_map (dict) -- map name to transform entity

  • constraints (list) -- List of constraints

static from_json_dict(json_dict)[源代码]#

Build a ConfigEntity from json serializable dictionary

参数:

json_dict (dict) -- Json serializable dictionary. This should be the return value of to_json_dict.

返回:

config -- The corresponding config object

返回类型:

ConfigEntity

get_flatten_feature()[源代码]#

flatten entities to a numerical one-dimensional feature vector

返回:

fea -- one dimensional float32 array

返回类型:

np.array

get_other_option()[源代码]#
返回:

other_option -- other tunable parameters (tunable parameters defined by cfg.define_knob)

返回类型:

dict

to_json_dict()[源代码]#

convert to a json serializable dictionary

返回:

json_dict -- a json serializable dictionary

返回类型:

dict

class tvm.autotvm.task.space.ConfigSpace[源代码]#

The configuration space of a schedule. Pass it as config in template to collect transformation space and build transform graph of axes

add_flop(flop)[源代码]#

Add float operation statistics for this tuning task

参数:

flop (int or float or IntImm or FloatImm) -- number of float operations

static axis(var)[源代码]#

get a virtual axis (axis placeholder)

参数:

var (int or tvm.te.schedule.IterVar) -- If is int, return an axis whose length is the provided argument. If is IterVar, return an axis whose length is extracted from the IterVar's extent domain.

clear_cache()[源代码]#

Clears the cache of index validity

define_annotate(name, axes, policy, **kwargs)[源代码]#

Define a new tunable knob which annotates a list of axes

参数:

  • name (str) -- name to index the entity of this space

  • axes (Array of tvm.te.schedule.IterVar) -- axes to annotate

  • policy (str) -- name of policy If is 'unroll', unroll the axes. If is 'try_unroll', try to unroll the axes. If is 'try_unroll_vec', try to unroll or vectorize the axes. If is 'bind_gpu', bind the first few axes to gpu threads. If is 'locate_cache', choose n axes to attach shared/local cache.

  • kwargs (dict) -- extra arguments for policy

define_knob(name, candidate)[源代码]#

Define a tunable knob with a list of candidates

参数:

  • name (str) -- name key of that option

  • candidate (list) -- list of candidates

define_reorder(name, axes, policy, **kwargs)[源代码]#

Define a new tunable knob which reorders a list of axes

参数:

  • name (str) -- name to index the entity of this space

  • axes (Array of tvm.te.schedule.IterVar) -- axes to reorder

  • policy (str) -- name of policy If is 'identity', do an identity permutation. If is 'all', try all permutations. If is 'interval_all', try all permutations of an interval of axes. If is 'candidate', try listed candidate. If is 'interleave', interleave chains of spatial axes and chains of reduction axes.

  • kwargs (dict) -- extra arguments for policy

define_split(name, axis, policy='factors', **kwargs)[源代码]#

Define a new tunable knob which splits an axis into a list of axes

参数:

  • name (str) -- name to index the entity of this space

  • axis (tvm.te.schedule.IterVar) -- axis to split

  • policy (str) -- name of policy. If is 'factors', the tuner will try all divisible factors. If is 'power2', the tuner will try power-of-two factors less or equal to the length. If is 'verbose', the tuner will try all candidates in above two policies. If is 'candidate', try given candidates.

  • **kwargs --

    extra arguments for policy

    max_factor:

    the maximum split factor (int).

    filter:

    see examples below for how to use filter (Callable[[int], bool]).

    num_outputs:

    the total number of axis after split (int).

    no_tail:

    should we only include divisible numbers as split factors (bool).

    candidate:

    (policy=candidate) manual candidate list (List).

示例

>>> # use custom candidates
>>> cfg.define_split('tile_x', x, policy='candidate', num_outputs=3,
>>>   candidate=[[1, 4, 4], [4, 1, 4]])

>>> # use a filter that only accepts the split scheme whose inner most tile is less then 4
>>> cfg.define_split('tile_y', y, policy='factors', num_outputs=3,
>>>   filter=lambda x: x.size[-1] <= 4)
property dims#

Dimensions in the space

get(index)[源代码]#

Get a config entity with detailed parameters from this space

参数:

index (int) -- index in the space

返回:

config -- config corresponds to the index

返回类型:

ConfigEntity

get_next_index(index, n=1, start=None, end=None)[源代码]#

Returns the nth valid next index or None if out of range

参数:

  • index (int) -- specifying at which position to start, inclusive

  • n (int, optional) -- step by using to find the next index, for the opposite direction a negative number should be used

  • start (list, optional) -- start of subrange, inclusive

  • end (list, optional) -- end of subrange, exclusive

返回:

next -- next index in the space

返回类型:

int

get_rand_index(start=None, end=None, to_exclude=None)[源代码]#

Returns a random valid index unlisted to exclusion

参数:

  • start (int, optional) -- specifying at which position to start, inclusive

  • end (int, optional) -- specifying at which position to end, exclusive

  • to_exclude (list, optional) -- determines unsuitable values

返回:

  • rand (int) -- random index in the space

  • .. note:: -- Excluding all valid space indexes will lead to an infinite loop.

is_index_valid(index)[源代码]#

Checks if the index satisfies the multi_filter condition

参数:

index (int) -- index from the range of the space

返回:

valid -- whether the index meets all the constraints

返回类型:

bool

knob2point(knob)[源代码]#

Convert knob form (vector) to point form (single integer)

参数:

knob (list) -- knob to convert

返回:

point -- point of the knob representation

返回类型:

int

multi_filter(filter)[源代码]#

The filter can restrict combination of parameters in difference to the knob filter, that restricts only single parameter

参数:

  • filter (function) -- predicate with one argument (Callable[[int], bool])

  • note:: (..) -- Using this filter causes additional restrictions on the use of __len__. Normally, it define the count of valid indexes and the range of space, but when multi_filter enabled, it requires to use __len__ for getting the count of valid indexes or range_length for the range of space. It is recommended to use: is_index_valid, get_next_index, get_rand_index to bypass the space

示例

>>> # Pre-requisites
>>> candidates = [[16, 64], [32, 32], [64, 16]]
>>> filter = lambda v: v.size[0] != 16
>>> multi_filter = lambda e: (e["tile_x"].size[0] + e["tile_y"].size[0]) <= 64

>>> # Case 1 - without filtering
>>> cfg.define_split("tile_x", x, num_outputs=2, policy="candidate", candidate=candidates)
>>> cfg.define_split("tile_y", y, num_outputs=2, policy="candidate", candidate=candidates)
>>> # [('tile_x', [16, 64]), ('tile_y', [16, 64])],None,0
>>> # [('tile_x', [32, 32]), ('tile_y', [16, 64])],None,1
>>> # [('tile_x', [64, 16]), ('tile_y', [16, 64])],None,2
>>> # [('tile_x', [16, 64]), ('tile_y', [32, 32])],None,3
>>> # [('tile_x', [32, 32]), ('tile_y', [32, 32])],None,4
>>> # [('tile_x', [64, 16]), ('tile_y', [32, 32])],None,5
>>> # [('tile_x', [16, 64]), ('tile_y', [64, 16])],None,6
>>> # [('tile_x', [32, 32]), ('tile_y', [64, 16])],None,7
>>> # [('tile_x', [64, 16]), ('tile_y', [64, 16])],None,8

>>> # Case 2 - with filter
>>> cfg.define_split("tile_x", x, num_outputs=2, policy="candidate", candidate=candidates,
>>>   filter=filter)
>>> cfg.define_split("tile_y", y, num_outputs=2, policy="candidate", candidate=candidates,
>>>   filter=filter)
>>> # [('tile_x', [32, 32]), ('tile_y', [32, 32])],None,0
>>> # [('tile_x', [64, 16]), ('tile_y', [32, 32])],None,1
>>> # [('tile_x', [32, 32]), ('tile_y', [64, 16])],None,2
>>> # [('tile_x', [64, 16]), ('tile_y', [64, 16])],None,3

>>> # Case 3 - with filter and multi_filter
>>> cfg.define_split("tile_x", x, num_outputs=2, policy="candidate", candidate=candidates,
>>>   filter=filter)
>>> cfg.define_split("tile_y", y, num_outputs=2, policy="candidate", candidate=candidates,
>>>   filter=filter)
>>> cfg.multi_filter(filter=multi_filter)
>>> # [('tile_x', [32, 32]), ('tile_y', [32, 32])],None,0
point2knob(point)[源代码]#

Convert point form (single integer) to knob (vector)

参数:

point (int) -- point to convert

返回:

knob -- knob representation of the point

返回类型:

list

raise_error(msg)[源代码]#

register error in config Using this to actively detect error when scheduling. Otherwise these error will occur during runtime, which will cost more time.

参数:

msg (str)

random_walk(point)[源代码]#

random walk as local transition

参数:

point (int) -- index of the ConfigEntity

返回:

new_point -- new neighborhood index

返回类型:

int

property range_length#

Length of the index range in the space

static reduce_axis(var)#

get a virtual axis (axis placeholder)

参数:

var (int or tvm.te.schedule.IterVar) -- If is int, return an axis whose length is the provided argument. If is IterVar, return an axis whose length is extracted from the IterVar's extent domain.

sample_ints(m)[源代码]#

Sample m different integer numbers from [0, self.range_length) without replacement This function is an alternative of np.random.choice when self.range_length > 2 ^ 32, in which case numpy does not work.

参数:

m (int) -- The number of sampled int

返回:

ints

返回类型:

an numpy array of size m

subrange_length(start, end)[源代码]#

Returns the number of valid indexes within the limited range from [start, end]

参数:

  • start (int) -- start of subrange, inclusive

  • end (int) -- end of subrange, exclusive

返回:

count -- number of valid indexes

返回类型:

int

valid()[源代码]#

Check whether the config meets all the constraints

备注

This check should be called after instantiation of task, because the ConfigEntity/ConfigSpace collects errors during instantiation

返回:

valid -- whether the config meets all the constraints

返回类型:

bool

class tvm.autotvm.task.space.FallbackConfigEntity[源代码]#

The config entity created to support fallback

fallback_split(name, constraints)[源代码]#

Fallback a split knob

参数:

  • name (str) -- name of the knob

  • constraints (List of int) -- The maximum tile size for every dimension. Value -1 means no constraint.

示例

If you use cfg.define_split('tile_0', 128, num_outputs=3), Then cfg.fallback_split('tile_0', [-1, 8, 4]) will give you cfg['tile_0'].size = [4, 8, 4]

If you use cfg.define_split('tile_0', 49, num_outputs=3), Then cfg.fallback_split('tile_0', [-1, 8, 4]) will give you cfg['tile_0'].size = [7, 7, 1]

fallback_with_reference_log(ref_log)[源代码]#

A data driven fallback mechanism. We use tuned parameters from TopHub as reference data. For an unseen shape, we find the most similar tuned one from TopHub and mimic its parameters. Note that we are not matching by workload (e.g., input size, kernel size), but instead matching by configuration space. The idea is that if two workloads have similar configuration space, their optimal configurations are also likely to be similar.

参数:

ref_log (List of (autotvm.measure.MeasureInput, autotvm.measure.MeasureResult)) -- The reference log

exception tvm.autotvm.task.space.InstantiationError[源代码]#

Actively detected error in instantiating a template with a config, raised by cfg.raise_error e.g. too many unrolling, too many threads in a block

class tvm.autotvm.task.space.OtherOptionEntity(val)[源代码]#

The parameter entity for general option, with a detailed value

class tvm.autotvm.task.space.OtherOptionSpace(axes, policy, **kwargs)[源代码]#

The parameter space for general option

static get_num_output(axes, policy, **kwargs)[源代码]#

get number of output axes after this transform

返回:

n -- number of output axes

返回类型:

int

class tvm.autotvm.task.space.ReorderEntity(perm)[源代码]#

A reorder operation with detailed parameters that can apply to axes

参数:

perm (Array of int) -- define the permutation

apply(sch, op, axes)[源代码]#

Apply reorder to an array of axes

参数:

  • sch (tvm.te.schedule.Schedule) -- The tvm schedule

  • op (tvm.te.Operation) -- The stage to be applied

  • axis (tvm.te.schedule.IterVar) -- axis to split

返回:

axes -- The transformed axes.

返回类型:

list of Axis

class tvm.autotvm.task.space.ReorderSpace(axes, policy, **kwargs)[源代码]#

The parameter space for ordering an array of axes

static get_num_output(axes, policy, **kwargs)[源代码]#

get number of output axes after this transform

返回:

n -- number of output axes

返回类型:

int

class tvm.autotvm.task.space.SplitEntity(size)[源代码]#

A split operation with detailed parameters that can apply to an axis

参数:

size (Array of int) -- the size of every axis after split. e.g. an axis of extent 128, we split it into 3 axes, a possible size is [4, 4, 8] (4x4x8 = 128).

apply(sch, op, axis)[源代码]#

Apply split to an axis

参数:

  • sch (tvm.te.schedule.Schedule) -- The tvm schedule

  • op (tvm.te.Operation) -- The stage to be applied

  • axis (tvm.te.schedule.IterVar) -- axis to split

返回:

axes -- The transformed axes.

返回类型:

list of Axis

class tvm.autotvm.task.space.SplitSpace(axes, policy, **kwargs)[源代码]#

Split an axis for several times

static get_num_output(axes, policy, **kwargs)[源代码]#

get number of output axes after this transform

返回:

n -- number of output axes

返回类型:

int

class tvm.autotvm.task.space.TransformSpace[源代码]#

Base class for transform space TransformSpace is the node in the computation graph of axes

备注

We can regard our schedule code as a transformation graph of axes. Starting from raw axes in the definition of te.compute, we can transform these axes by some operators. The operator includes 'split', 'reorder' and 'annotate'. Each operator has some tunable parameters (e.g. the split factor). Then the tuning process is just to find good parameters of these op.

So all the combinations of the parameters of these op form our search space.

Naming convention: We call the set of all possible values as XXXSpace. (XXX can be Split, Reorder, Config ...) We call a specific entity in a space as XXXEntity.

static get_num_output()[源代码]#

get number of output axes after this transform

返回:

n -- number of output axes

返回类型:

int

class tvm.autotvm.task.space.VirtualAxis(var, name=None)[源代码]#

Axis placeholder in template

参数:

  • var (int or tvm.te.schedule.IterVar) -- If is int, return a virtual axis whose length is the provided argument. If is IterVar, return a virtual axis whose length is extracted from the IterVar's extent domain.

  • name (str)

static get_num_output(var, name=None)[源代码]#

get number of output axes after this transform

返回:

n -- number of output axes

返回类型:

int

tvm.autotvm.task.space.get_factors(n)[源代码]#

return all factors of an integer

参数:

n (int) -- integer to factorize

返回:

factors -- List of all factors

返回类型:

list

tvm.autotvm.task.space.get_pow2s(n)[源代码]#

return all power-of-two numbers that are less or equal than the integer

参数:

n (int) -- integer for reference

返回:

factors -- List of all power-of-two numbers

返回类型:

list

Template dispatcher module.

A dispatcher is a function that can contains multiple behaviors. Its specific behavior is can be controlled by DispatchContext.

DispatchContext is used in two ways, usually via different implementation of the DispatchContext base class.

  • During search, we can use it to pass the current proposal from tuner.

  • During evaluation, we can use it to set pick the best policy.

class tvm.autotvm.task.dispatcher.ApplyConfig(config)[源代码]#

Apply a deterministic config entity for all queries.

参数:

config (ConfigSpace or ConfigEntity) -- The specific configuration we care about.

update(target, workload, cfg)[源代码]#

Override update

class tvm.autotvm.task.dispatcher.ApplyFixedConfig(tasks, schedule_names: str | List[str])[源代码]#

Apply a config of a deterministic schedule. This is used for building a single Relay operator with deterministic schedule for testing schedules at Relay level.

参数:
update(target, workload, cfg)[源代码]#

Override update

class tvm.autotvm.task.dispatcher.ApplyGraphBest(records: str | bytes | Path | TextIOBase | Iterable[Tuple[MeasureInput, MeasureResult]])[源代码]#

Load the graph level tuning optimal schedules.

The input records should be in the ascending order of node index for target operator. Usually this can be obtained with graph tuner.

This context maintains an internal counter to indicate the current node index.

update(target, workload, cfg)[源代码]#

Update context with a specific config.

参数:

  • target (Target) -- The current target

  • workload (Workload) -- The current workload.

  • cfg (ConfigSpace) -- The specific configuration.

备注

This interface is for cases when TVM decides to replace an operator in the graph. For example, AlterOpLayout pass (enables when opt_level = 3) replaces NCHW convolution with NCHW[x]c implementation on x86 CPUs. Thus in TOPI, we first query schedule using original NCHW workload, then update the dispatcher with the new NCHW[x]c workload. So that later on, NCHW[x]c convolution can get schedule from the dispatcher using its own workload directly.

@conv2d_alter_layout.register("cpu")
def _alter_conv2d_layout(attrs, inputs, tinfo):
    workload = get_conv2d_workload(...)
    dispatch_ctx = autotvm.task.DispatchContext.current
    target = tvm.target.Target.current()
    config = dispatch_ctx.query(target, workload)

    # Get conv2d_NCHWc workload from config
    # new_workload = ...
    # new_inputs = ...
    # new_attrs = ...

    # Store altered operator's config
    dispatch_ctx.update(target, new_workload, config)
    return sym.contrib.conv2d_NCHWc(*new_inputs, **new_attrs)

We directly store config back because conv2d_NCHW and conv2d_NCHWc share the same schedule parameters. One can construct a new ConfigEntity if this is not the case.

class tvm.autotvm.task.dispatcher.ApplyHistoryBest(records: None | str | bytes | Path | TextIOBase | Iterable[Tuple[MeasureInput, MeasureResult]] | Iterable[str | bytes | Path | TextIOBase | Iterable[Tuple[MeasureInput, MeasureResult]]])[源代码]#

Apply the history best config

参数:

records (None, Records, or iterator of Records objects, where a) --

Records object is a path-like object, a file-like object,

or an iterator of (MeasureInput, MeasureResult).

Collection of tuning records. If multiple Records objects are passed, their contents will be merged.

load(records: str | bytes | Path | TextIOBase | Iterable[Tuple[MeasureInput, MeasureResult]] | Iterable[str | bytes | Path | TextIOBase | Iterable[Tuple[MeasureInput, MeasureResult]]])[源代码]#

Load records to this dispatch context

参数:

records (str, list of str, or iterator of (autotvm.measure.MeasureInput, autotvm.measure.MeasureResult)) -- Collection of tuning records. If multiple Records objects are passed, their contents will be merged.

update(target, workload, cfg)[源代码]#

Update context with a specific config.

参数:

  • target (Target) -- The current target

  • workload (Workload) -- The current workload.

  • cfg (ConfigSpace) -- The specific configuration.

备注

This interface is for cases when TVM decides to replace an operator in the graph. For example, AlterOpLayout pass (enables when opt_level = 3) replaces NCHW convolution with NCHW[x]c implementation on x86 CPUs. Thus in TOPI, we first query schedule using original NCHW workload, then update the dispatcher with the new NCHW[x]c workload. So that later on, NCHW[x]c convolution can get schedule from the dispatcher using its own workload directly.

@conv2d_alter_layout.register("cpu")
def _alter_conv2d_layout(attrs, inputs, tinfo):
    workload = get_conv2d_workload(...)
    dispatch_ctx = autotvm.task.DispatchContext.current
    target = tvm.target.Target.current()
    config = dispatch_ctx.query(target, workload)

    # Get conv2d_NCHWc workload from config
    # new_workload = ...
    # new_inputs = ...
    # new_attrs = ...

    # Store altered operator's config
    dispatch_ctx.update(target, new_workload, config)
    return sym.contrib.conv2d_NCHWc(*new_inputs, **new_attrs)

We directly store config back because conv2d_NCHW and conv2d_NCHWc share the same schedule parameters. One can construct a new ConfigEntity if this is not the case.

class tvm.autotvm.task.dispatcher.DispatchContext[源代码]#

Base class of dispatch context.

DispatchContext enables the target and workload specific dispatch mechanism for templates.

query(target, workload)[源代码]#

Query the context to get the specific config for a template. If cannot find the result inside this context, this function will query it from the upper contexts.

参数:

  • target (Target) -- The current target

  • workload (Workload) -- The current workload.

返回:

cfg -- The specific configuration.

返回类型:

ConfigSpace

update(target, workload, cfg)[源代码]#

Update context with a specific config.

参数:

  • target (Target) -- The current target

  • workload (Workload) -- The current workload.

  • cfg (ConfigSpace) -- The specific configuration.

备注

This interface is for cases when TVM decides to replace an operator in the graph. For example, AlterOpLayout pass (enables when opt_level = 3) replaces NCHW convolution with NCHW[x]c implementation on x86 CPUs. Thus in TOPI, we first query schedule using original NCHW workload, then update the dispatcher with the new NCHW[x]c workload. So that later on, NCHW[x]c convolution can get schedule from the dispatcher using its own workload directly.

@conv2d_alter_layout.register("cpu")
def _alter_conv2d_layout(attrs, inputs, tinfo):
    workload = get_conv2d_workload(...)
    dispatch_ctx = autotvm.task.DispatchContext.current
    target = tvm.target.Target.current()
    config = dispatch_ctx.query(target, workload)

    # Get conv2d_NCHWc workload from config
    # new_workload = ...
    # new_inputs = ...
    # new_attrs = ...

    # Store altered operator's config
    dispatch_ctx.update(target, new_workload, config)
    return sym.contrib.conv2d_NCHWc(*new_inputs, **new_attrs)

We directly store config back because conv2d_NCHW and conv2d_NCHWc share the same schedule parameters. One can construct a new ConfigEntity if this is not the case.

class tvm.autotvm.task.dispatcher.FallbackContext[源代码]#

A fallback dispatch context.

Any tunable template can be called under this context. This is the root context.

clear_cache(target, workload)[源代码]#

Clear fallback cache. Pass the same argument as _query_inside to this function to clean the cache.

参数:

  • target (Target) -- The current target

  • workload (Workload) -- The current workload.

update(target, workload, cfg)[源代码]#

Update context with a specific config.

参数:

  • target (Target) -- The current target

  • workload (Workload) -- The current workload.

  • cfg (ConfigSpace) -- The specific configuration.

备注

This interface is for cases when TVM decides to replace an operator in the graph. For example, AlterOpLayout pass (enables when opt_level = 3) replaces NCHW convolution with NCHW[x]c implementation on x86 CPUs. Thus in TOPI, we first query schedule using original NCHW workload, then update the dispatcher with the new NCHW[x]c workload. So that later on, NCHW[x]c convolution can get schedule from the dispatcher using its own workload directly.

@conv2d_alter_layout.register("cpu")
def _alter_conv2d_layout(attrs, inputs, tinfo):
    workload = get_conv2d_workload(...)
    dispatch_ctx = autotvm.task.DispatchContext.current
    target = tvm.target.Target.current()
    config = dispatch_ctx.query(target, workload)

    # Get conv2d_NCHWc workload from config
    # new_workload = ...
    # new_inputs = ...
    # new_attrs = ...

    # Store altered operator's config
    dispatch_ctx.update(target, new_workload, config)
    return sym.contrib.conv2d_NCHWc(*new_inputs, **new_attrs)

We directly store config back because conv2d_NCHW and conv2d_NCHWc share the same schedule parameters. One can construct a new ConfigEntity if this is not the case.

tvm.autotvm.task.dispatcher.clear_fallback_cache(target, workload)[源代码]#

Clear fallback cache. Pass the same argument as _query_inside to this function to clean the cache.

参数:

  • target (Target) -- The current target

  • workload (Workload) -- The current workload.

备注

This is used in alter_op_layout to clear the bad cache created before call topi compute function

Decorators for registering tunable templates to TOPI.

These decorators can make your simple implementation be able to use different configurations for different workloads. Here we directly use all arguments to the TOPI call as "workload", so make sure all the arguments (except tvm.te.Tensor) in you calls are hashable. For tvm.te.Tensor, we will serialize it to a hashable tuple.

See tvm/topi/python/topi/arm_cpu/depthwise_conv2d.py for example usage.

class tvm.autotvm.task.topi_integration.TaskExtractEnv(allow_duplicate=False)[源代码]#

Global environment for extracting tuning tasks from graph

add_task(task_name, args)[源代码]#

Add AutoTVM task

参数:

  • task_name (str) -- AutoTVM task name.

  • args (tuple) -- Arguments to the TOPI function.

static get(allow_duplicate=False)[源代码]#

Get the single instance of TaskExtractEnv

参数:

allow_duplicate (boolean) -- Whether to fetch all workloads in the network, even though some of them are the same. This is useful for graph tuning.

返回:

env -- The single instance of TaskExtractEnv

返回类型:

TaskExtractEnv

get_tasks()[源代码]#

Get collected tasks

返回:

tasks -- A list of tasks extracted from the graph

返回类型:

List of tuple(name, args)

reset(wanted_relay_ops=None)[源代码]#

Reset task collections

参数:

wanted_relay_ops (List of tvm.ir.Op) -- The relay ops to be extracted

tvm.autotvm.task.topi_integration.get_workload(outs, task_name=None)[源代码]#

Retrieve the workload from outputs

tvm.autotvm.task.topi_integration.register_topi_compute(task_name, func=None)[源代码]#

Register a tunable template for a topi compute function.

The registration will wrap this topi compute to take cfg as the first argument, followed by the original argument list. It uses all its argument as workload and stores this "workload" to its final ComputeOp, which can be used to reconstruct "workload" in the following topi_schedule call.

参数:

  • task_name (str) -- The AutoTVM task name

  • func (None or callable) -- If it is None, return a decorator. If is callable, decorate this function.

返回:

decorator -- A decorator

返回类型:

callable

示例

See tvm/topi/python/topi/arm_cpu/depthwise_conv2d.py for example usage.

tvm.autotvm.task.topi_integration.register_topi_schedule(task_name, func=None)[源代码]#

Register a tunable template for a topi schedule function.

The registration will wrap this topi schedule to take cfg as the first argument, followed by the original argument list.

Note that this function will try to find "workload" from all the ComputeOp in the input. You can attach "workload" to your compute op by using register_topi_compute.

The task name has to be the same as that of the corresponding topi compute function.

参数:

  • task_name (str) -- The AutoTVM task name

  • func (None or callable) -- If it is None, return a decorator. If is callable, decorate this function.

返回:

decorator -- A decorator

返回类型:

callable

示例

See tvm/topi/python/topi/arm_cpu/depthwise_conv2d.py for example usage.

tvm.autotvm.record#

Tuning record and serialization format

tvm.autotvm.record.decode(row, protocol='json')[源代码]#

Decode encoded record string to python object

参数:

  • row (str) -- a row in the logger file

  • protocol (str) -- log protocol, json or pickle

返回:

ret -- The tuple of input and result, or None if input uses old version log format.

返回类型:

tuple(autotvm.measure.MeasureInput, autotvm.measure.MeasureResult), or None

tvm.autotvm.record.encode(inp, result, protocol='json')[源代码]#

encode (MeasureInput, MeasureResult) pair to a string

参数:
返回:

row -- a row in the logger file

返回类型:

str

tvm.autotvm.record.load_from_buffer(file: TextIOBase)[源代码]#

Generator: load records from buffer. This is a generator that yields the records.

参数:

file (io.TextIOBase)

生成器:

  • input (autotvm.measure.MeasureInput)

  • result (autotvm.measure.MeasureResult)

tvm.autotvm.record.load_from_file(filepath: str | bytes | PathLike)[源代码]#

Generator: load records from path. This is a generator that yields the records.

参数:

filepath (str, bytes, or os.PathLike)

生成器:

  • input (autotvm.measure.MeasureInput)

  • result (autotvm.measure.MeasureResult)

tvm.autotvm.record.measure_str_key(inp, include_config=True)[源代码]#

get unique str key for MeasureInput

参数:
返回:

key -- The str representation of key

返回类型:

str

tvm.autotvm.record.pick_best(in_file, out_file)[源代码]#

Pick the best entries from a file and store them to another file. This function distills the useful log entries from a large log file. If out_file already exists, the best entries from both in_file and out_file will be saved.

参数:

  • in_file (str) -- The filename of input

  • out_file (str or file) -- The filename of output

tvm.autotvm.record.split_workload(in_file, clean=True)[源代码]#

Split a log file into separate files, each of which contains only a single workload This function can also delete duplicated records in log file

参数:

  • in_file (str) -- input filename

  • clean (bool) -- whether delete duplicated items

目录