Source code for mxnet.engine

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# coding: utf-8
"""Engine properties management."""
from __future__ import absolute_import

import ctypes
from .base import _LIB, check_call


[docs]def set_bulk_size(size): """Set size limit on bulk execution. Bulk execution bundles many operators to run together. This can improve performance when running a lot of small operators sequentially. Parameters ---------- size : int Maximum number of operators that can be bundled in a bulk. Returns ------- int Previous bulk size. """ prev = ctypes.c_int() check_call(_LIB.MXEngineSetBulkSize( ctypes.c_int(size), ctypes.byref(prev))) return prev.value
class _BulkScope(object): """Scope object for bulk execution.""" def __init__(self, size): self._size = size self._old_size = None def __enter__(self): self._old_size = set_bulk_size(self._size) return self def __exit__(self, ptype, value, trace): set_bulk_size(self._old_size)
[docs]def bulk(size): """Bulk execution bundles many operators to run together. This can improve performance when running a lot of small operators sequentially. Returns a scope for managing bulk size:: with mx.engine.bulk(10): x = mx.nd.zeros((1,)) for i in range(100): x += 1 """ return _BulkScope(size)