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123 lines
4.7 KiB
123 lines
4.7 KiB
import os
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from copy import deepcopy
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from functools import partial
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import pytest
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import torch
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import torch.distributed as dist
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import torch.multiprocessing as mp
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from chatgpt.experience_maker import NaiveExperienceMaker
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from chatgpt.models.base import RewardModel
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from chatgpt.models.gpt import GPTActor, GPTCritic
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from chatgpt.replay_buffer import NaiveReplayBuffer
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from chatgpt.trainer.strategies import ColossalAIStrategy, DDPStrategy
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from transformers.models.gpt2.configuration_gpt2 import GPT2Config
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from colossalai.testing import rerun_if_address_is_in_use
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from colossalai.utils import free_port
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GPT_CONFIG = GPT2Config(n_embd=128, n_layer=4, n_head=4)
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def get_data(batch_size: int, seq_len: int = 10) -> dict:
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input_ids = torch.randint(0, 50257, (batch_size, seq_len), device='cuda')
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attention_mask = torch.ones_like(input_ids)
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return dict(input_ids=input_ids, attention_mask=attention_mask)
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def gather_and_equal(tensor: torch.Tensor) -> bool:
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world_size = dist.get_world_size()
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outputs = [torch.empty_like(tensor) for _ in range(world_size)]
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dist.all_gather(outputs, tensor.contiguous())
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for t in outputs[1:]:
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if not torch.equal(outputs[0], t):
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return False
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return True
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def run_test_data(strategy):
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EXPERINCE_BATCH_SIZE = 4
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SAMPLE_BATCH_SIZE = 2
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if strategy == 'ddp':
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strategy = DDPStrategy()
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elif strategy == 'colossalai':
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strategy = ColossalAIStrategy(placement_policy='cuda')
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else:
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raise ValueError(f'Unsupported strategy "{strategy}"')
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actor = GPTActor(config=GPT_CONFIG).cuda()
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critic = GPTCritic(config=GPT_CONFIG).cuda()
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initial_model = deepcopy(actor)
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reward_model = RewardModel(deepcopy(critic.model)).cuda()
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experience_maker = NaiveExperienceMaker(actor, critic, reward_model, initial_model)
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replay_buffer = NaiveReplayBuffer(SAMPLE_BATCH_SIZE, cpu_offload=False)
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# experience of all ranks should be the same
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for _ in range(2):
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data = get_data(EXPERINCE_BATCH_SIZE)
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assert gather_and_equal(data['input_ids'])
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assert gather_and_equal(data['attention_mask'])
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experience = experience_maker.make_experience(**data,
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do_sample=True,
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max_length=16,
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eos_token_id=50256,
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pad_token_id=50256)
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assert gather_and_equal(experience.sequences)
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assert gather_and_equal(experience.action_log_probs)
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assert gather_and_equal(experience.values)
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assert gather_and_equal(experience.reward)
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assert gather_and_equal(experience.advantages)
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assert gather_and_equal(experience.action_mask)
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assert gather_and_equal(experience.attention_mask)
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replay_buffer.append(experience)
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# replay buffer's data should be the same
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buffer_size = torch.tensor([len(replay_buffer)], device='cuda')
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assert gather_and_equal(buffer_size)
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for item in replay_buffer.items:
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assert gather_and_equal(item.sequences)
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assert gather_and_equal(item.action_log_probs)
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assert gather_and_equal(item.values)
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assert gather_and_equal(item.reward)
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assert gather_and_equal(item.advantages)
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assert gather_and_equal(item.action_mask)
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assert gather_and_equal(item.attention_mask)
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# dataloader of each rank should have the same size and different batch
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dataloader = strategy.setup_dataloader(replay_buffer)
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dataloader_size = torch.tensor([len(dataloader)], device='cuda')
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assert gather_and_equal(dataloader_size)
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for experience in dataloader:
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assert not gather_and_equal(experience.sequences)
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assert not gather_and_equal(experience.action_log_probs)
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assert not gather_and_equal(experience.values)
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assert not gather_and_equal(experience.reward)
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assert not gather_and_equal(experience.advantages)
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# action mask and attention mask may be same
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def run_dist(rank, world_size, port, strategy):
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os.environ['RANK'] = str(rank)
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os.environ['LOCAL_RANK'] = str(rank)
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os.environ['WORLD_SIZE'] = str(world_size)
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os.environ['MASTER_ADDR'] = 'localhost'
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os.environ['MASTER_PORT'] = str(port)
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run_test_data(strategy)
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@pytest.mark.skip
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@pytest.mark.dist
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@pytest.mark.parametrize('world_size', [2])
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@pytest.mark.parametrize('strategy', ['ddp', 'colossalai'])
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@rerun_if_address_is_in_use()
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def test_data(world_size, strategy):
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run_func = partial(run_dist, world_size=world_size, port=free_port(), strategy=strategy)
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mp.spawn(run_func, nprocs=world_size)
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if __name__ == '__main__':
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test_data(2, 'colossalai')
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