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ffcb0989e7
Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/45292 This PR merges all quantization mode and will only expose the following top level functions: ``` prepare_fx prepare_qat_fx convert_fx ``` Test Plan: Imported from OSS Reviewed By: vkuzo Differential Revision: D23913105 fbshipit-source-id: 4e335286d6de225839daf51d1df54322d52d68e5
75 lines
2.4 KiB
Python
75 lines
2.4 KiB
Python
import torch
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import sys
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from collections import OrderedDict
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# pattern for conv bn fusion
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FUSION_PATTERNS = OrderedDict()
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def register_fusion_pattern(pattern):
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def insert(fn):
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FUSION_PATTERNS[pattern] = fn
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return fn
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return insert
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def get_fusion_patterns():
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return FUSION_PATTERNS
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QUANTIZATION_PATTERNS = OrderedDict()
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# Register pattern for both static quantization and qat
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def register_quant_pattern(pattern):
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def insert(fn):
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QUANTIZATION_PATTERNS[pattern] = fn
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return fn
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return insert
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# Get patterns for both static quantization and qat
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def get_quant_patterns():
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return QUANTIZATION_PATTERNS
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# Example use of register pattern function:
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# @register_fusion_pattern(torch.nn.ReLU, (torch.nn.BatchNorm2d, torch.nn.Conv2d)))
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# class ConvBNReLUFusion():
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# def __init__(...):
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# ...
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#
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# Note: The order of patterns is important! match function will take whatever is matched first, so we'll
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# need to put the fusion patterns before single patterns. For example, add_relu should be registered come before relu.
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# decorators are applied in the reverse order we see. Also when we match the nodes in the graph with these patterns,
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# we'll start from the last node of the graph and traverse back.
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def is_match(modules, node, pattern, max_uses=sys.maxsize):
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""" Matches a node in fx against a pattern
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"""
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if isinstance(pattern, tuple):
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self_match, *arg_matches = pattern
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if self_match is getattr:
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assert len(pattern) == 2, 'Expecting getattr pattern to have two elements'
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arg_matches = []
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else:
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self_match = pattern
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arg_matches = []
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if node.uses > max_uses:
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return False
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if isinstance(self_match, type) and issubclass(self_match, torch.nn.Module):
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if node.op != 'call_module':
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return False
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if not type(modules[node.target]) == self_match:
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return False
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elif callable(self_match):
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if node.op != 'call_function' or node.target is not self_match:
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return False
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elif node.target is getattr:
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if node.args[1] != pattern[1]:
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return False
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elif node.target != self_match:
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return False
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if not arg_matches:
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return True
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if len(arg_matches) != len(node.args):
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return False
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return all(is_match(modules, node, arg_match, max_uses=1) for node, arg_match in zip(node.args, arg_matches))
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