1bbb20ea13
### What this PR does / why we need it?
Flashcomm_v1 optim in Qwen Dense Models.
### Does this PR introduce _any_ user-facing change?
No.
### How was this patch tested?
CI passed with new added/existing test.
- vLLM version: v0.10.1.1
- vLLM main:
5e537f45b4
Co-authored-by: 1024daniel <xxltju324@gmail.com>
63 lines
2.6 KiB
Python
63 lines
2.6 KiB
Python
import torch
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import torch.nn.functional as F
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from vllm.distributed import (get_tensor_model_parallel_rank,
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get_tensor_model_parallel_world_size,
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tensor_model_parallel_all_gather,
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tensor_model_parallel_all_reduce,
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tensor_model_parallel_reduce_scatter)
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from vllm.forward_context import get_forward_context
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from vllm.utils import direct_register_custom_op
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def _maybe_chunk_residual_impl(x: torch.Tensor,
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residual: torch.Tensor) -> torch.Tensor:
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if get_forward_context().flashcomm_v1_enabled:
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pad_size = get_forward_context().pad_size
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if pad_size > 0:
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residual = F.pad(residual, (0, 0, 0, pad_size))
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tp_size = get_tensor_model_parallel_world_size()
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tp_rank = get_tensor_model_parallel_rank()
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residual = torch.chunk(residual, tp_size, dim=0)[tp_rank]
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return residual
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def _maybe_all_gather_and_maybe_unpad_impl(x: torch.Tensor,
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label: bool) -> torch.Tensor:
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flashcomm_v1_enabled = get_forward_context().flashcomm_v1_enabled
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if flashcomm_v1_enabled and label:
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x = tensor_model_parallel_all_gather(x, 0)
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pad_size = get_forward_context().pad_size
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if pad_size > 0:
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x = x[:-pad_size, :]
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return x
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def _maybe_pad_and_reduce_impl(x: torch.Tensor) -> torch.Tensor:
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flashcomm_v1_enabled = get_forward_context().flashcomm_v1_enabled
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if flashcomm_v1_enabled:
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pad_size = get_forward_context().pad_size
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if pad_size > 0:
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x = F.pad(x, (0, 0, 0, pad_size))
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return tensor_model_parallel_reduce_scatter(x, 0)
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else:
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return tensor_model_parallel_all_reduce(x)
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direct_register_custom_op(op_name="maybe_chunk_residual",
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op_func=_maybe_chunk_residual_impl,
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fake_impl=lambda x, residual: residual,
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mutates_args=[],
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dispatch_key="PrivateUse1")
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direct_register_custom_op(op_name="maybe_all_gather_and_maybe_unpad",
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op_func=_maybe_all_gather_and_maybe_unpad_impl,
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fake_impl=lambda x, label: x,
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mutates_args=[],
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dispatch_key="PrivateUse1")
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direct_register_custom_op(op_name="maybe_pad_and_reduce",
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op_func=_maybe_pad_and_reduce_impl,
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fake_impl=lambda x: x,
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mutates_args=[],
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dispatch_key="PrivateUse1") |