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72 lines
2.5 KiB
72 lines
2.5 KiB
import pytest
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import torch
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import torch.distributed as dist
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import torch.nn as nn
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import colossalai
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from colossalai.context.moe_context import MOE_CONTEXT
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from colossalai.legacy.engine.gradient_handler import MoeGradientHandler
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from colossalai.nn.layer.moe import Experts, MoeLayer, Top1Router, UniformNoiseGenerator
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from colossalai.testing import assert_equal_in_group, rerun_if_address_is_in_use, spawn
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from colossalai.utils import get_current_device
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from colossalai.utils.moe import sync_moe_model_param
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BATCH_SIZE = 4
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DIM = 16
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CONFIG = dict()
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def run_test(rank, world_size, port):
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colossalai.launch(config=CONFIG, rank=rank, world_size=world_size, host='localhost', port=port, backend='nccl')
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expert_module = nn.Linear
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expert_factor = dict(in_features=DIM, out_features=DIM, device=get_current_device())
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MOE_CONTEXT.setup(42) # MOE initialization
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noisy_func = UniformNoiseGenerator()
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router = Top1Router(noisy_func=noisy_func)
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num_experts_list = [1, 2, 4]
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layer_list = []
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for num_experts in num_experts_list:
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exp = Experts(expert_module, num_experts, **expert_factor)
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moe_layer = MoeLayer(DIM, num_experts, router, exp)
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layer_list.append(moe_layer)
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model = nn.ModuleList(layer_list)
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model = model.to(get_current_device())
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sync_moe_model_param(model)
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dist_dict = MOE_CONTEXT.parallel_info_dict
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assert_equal_in_group(layer_list[0].experts.experts[0].weight.data, dist_dict[1].dp_group)
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assert_equal_in_group(layer_list[1].experts.experts[0].weight.data, dist_dict[2].dp_group)
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# MoE model synchronization passed
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grad_handler = MoeGradientHandler(model, 0)
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rank = dist.get_rank()
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torch.cuda.manual_seed(78 + rank)
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data = torch.randn(BATCH_SIZE, DIM, device=get_current_device())
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grad = torch.randn_like(data)
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MOE_CONTEXT.reset_loss()
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for layer in layer_list:
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data, _ = layer(data)
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data.backward(grad)
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grad_handler.handle_gradient()
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assert_equal_in_group(layer_list[0].experts.experts[0].weight.grad, dist_dict[1].dp_group)
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assert_equal_in_group(layer_list[0].experts.experts[0].bias.grad, dist_dict[1].dp_group)
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assert_equal_in_group(layer_list[1].experts.experts[0].weight.grad, dist_dict[2].dp_group)
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assert_equal_in_group(layer_list[1].experts.experts[0].bias.grad, dist_dict[2].dp_group)
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# MoE grad handler test passed
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@pytest.mark.dist
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@rerun_if_address_is_in_use()
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def test_grad_handler():
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spawn(run_test, 4)
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if __name__ == '__main__':
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test_grad_handler()
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