mirror of https://github.com/hpcaitech/ColossalAI
119 lines
4.7 KiB
Python
119 lines
4.7 KiB
Python
import torch
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from torch.fx import GraphModule
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import torch.nn as nn
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import pytest
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from colossalai.fx.proxy import ColoProxy
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from colossalai.fx.tracer.tracer import ColoTracer
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from colossalai.tensor.sharding_spec import ShardingSpec, _DimSpec
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from colossalai.auto_parallel.solver.op_handler.batch_norm_handler import BatchNormHandler
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from colossalai.auto_parallel.solver.sharding_strategy import ShardingStrategy, StrategiesVector
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from colossalai.device.device_mesh import DeviceMesh
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class BNModel(nn.Module):
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def __init__(self, c):
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super().__init__()
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self.bn = nn.BatchNorm2d(c)
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def forward(self, x):
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x = x * 2
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x = self.bn(x)
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return x
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def test_bn_handler():
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physical_mesh_id = torch.arange(0, 4)
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mesh_shape = (2, 2)
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# [[0, 1]
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# [2, 3]]
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device_mesh = DeviceMesh(physical_mesh_id, mesh_shape)
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entire_shape = torch.Size((4, 16, 64, 64))
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tracer = ColoTracer()
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model = BNModel(16)
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input_sample = {'x': torch.rand(4, 16, 64, 64).to('meta')}
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# graph():
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# %x : torch.Tensor [#users=1] = placeholder[target=x]
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# %mul : [#users=1] = call_function[target=operator.mul](args = (%x, 2), kwargs = {})
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# %bn : [#users=1] = call_module[target=bn](args = (%mul,), kwargs = {})
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# return bn
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graph = tracer.trace(root=model, meta_args=input_sample)
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gm = GraphModule(model, graph, model.__class__.__name__)
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gm.recompile()
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# [x, mul, bn, output]
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nodes = [node for node in gm.graph.nodes]
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# find the sharding strategies for the input node of the bn node
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# strategies_for_input = [[R, R, R, R], [R, S0, R, R], [R, S1, R, R], [S0, R, R, R], [S0, S1, R, R], [S1, R, R, R], [S1, S0, R, R]]
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strategies_vector_for_input = StrategiesVector(nodes[1])
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sharding_option = (None, 0, 1)
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for first_sharding_index in sharding_option:
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for second_sharding_index in sharding_option:
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if first_sharding_index is not None and second_sharding_index == first_sharding_index:
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continue
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if first_sharding_index is None:
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first_dim_spec = _DimSpec([])
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else:
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first_dim_spec = _DimSpec([first_sharding_index])
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if second_sharding_index is None:
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second_dim_spec = _DimSpec([])
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else:
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second_dim_spec = _DimSpec([second_sharding_index])
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replica_dim_spec = _DimSpec([])
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sharding_sequence = [first_dim_spec, second_dim_spec, replica_dim_spec, replica_dim_spec]
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sharding_spec = ShardingSpec(device_mesh=device_mesh,
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entire_shape=entire_shape,
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sharding_sequence=sharding_sequence)
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strategy_name = str(sharding_spec.sharding_sequence)
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sharding_strategy = ShardingStrategy(name=strategy_name, output_sharding_spec=sharding_spec)
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strategies_vector_for_input.append(sharding_strategy)
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setattr(nodes[1], 'strategies_vector', strategies_vector_for_input)
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# generate bn strategy
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strategies_vector = StrategiesVector(node=nodes[2])
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bn_handler = BatchNormHandler(
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node=nodes[2],
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device_mesh=device_mesh,
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strategies_vector=strategies_vector,
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)
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bn_handler.register_strategy()
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# ['RS0 = RS0 x S0', 'S1S0 = RS0 x S0', 'RS1 = RS1 x S1', 'S0S1 = RS1 x S1', 'RR = RR x R', 'S0R = RR x R', 'S1R = RR x R', 'S01R = RR x R', 'RS01 = RS01 x S01',
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# 'S0R = S0R x R WITH SYNC_BN', 'S1R = S1R x R WITH SYNC_BN', 'S0S1 = S0S1 x S1 WITH SYNC_BN', 'S1S0 = S1S0 x S0 WITH SYNC_BN', 'S01R = S01R x R WITH SYNC_BN']
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strategy_name_list = [strategy.name for strategy in bn_handler.strategies_vector]
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# RS = RS x S and strategies based on it, such as
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# SS = RS x S
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assert 'RS0 = RS0 x S0' in strategy_name_list
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assert 'S1S0 = RS0 x S0' in strategy_name_list
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assert 'RS1 = RS1 x S1' in strategy_name_list
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assert 'S0S1 = RS1 x S1' in strategy_name_list
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# RR = RR x R and strategies based on it, such as
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# SR = SR x R
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assert 'RR = RR x R' in strategy_name_list
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assert 'S0R = RR x R' in strategy_name_list
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assert 'S1R = RR x R' in strategy_name_list
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assert 'S01R = RR x R' in strategy_name_list
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# RS01 = RS01 x S01
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assert 'RS01 = RS01 x S01' in strategy_name_list
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# SR = SR x R WITH SYNC_BN
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assert 'S0R = S0R x R WITH SYNC_BN' in strategy_name_list
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assert 'S1R = S1R x R WITH SYNC_BN' in strategy_name_list
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# SS = SS x S WITH SYNC_BN
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assert 'S0S1 = S0S1 x S1 WITH SYNC_BN' in strategy_name_list
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assert 'S1S0 = S1S0 x S0 WITH SYNC_BN' in strategy_name_list
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# S01R = S01R x R WITH SYNC_BN
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assert 'S01R = S01R x R WITH SYNC_BN' in strategy_name_list
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if __name__ == '__main__':
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test_bn_handler()
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