87 lines
3.2 KiB
Python
87 lines
3.2 KiB
Python
# SPDX-License-Identifier: Apache-2.0
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from contextlib import contextmanager
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from typing import Any
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import torch
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from vllm.config import VllmConfig
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from vllm.logger import init_logger
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from vllm.model_executor.model_loader import get_model
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from vllm.v1.worker.gpu_model_runner import GPUModelRunner
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logger = init_logger(__name__)
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class CPUModelRunner(GPUModelRunner):
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def __init__(self, vllm_config: VllmConfig, device: torch.device):
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super().__init__(vllm_config, device)
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assert device == torch.device("cpu")
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assert self.speculative_config is None, "spec decode is not supported."
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self.use_cuda_graph = False
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self.cascade_attn_enabled = False
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self._postprocess_tenosrs()
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def _postprocess_tenosrs(self) -> None:
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# Note: replace device tensors with cpu tensors
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def replace_tensor(obj: Any, cpu_attr_name: str,
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device_attr_name) -> None:
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cpu_tensor = getattr(obj, cpu_attr_name, None)
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device_tensor = getattr(obj, device_attr_name, None)
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if cpu_tensor is not None and device_tensor is not None:
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assert isinstance(cpu_tensor, torch.Tensor)
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assert isinstance(device_tensor, torch.Tensor)
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setattr(obj, device_attr_name, cpu_tensor)
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for k, v in vars(self).items():
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if k.endswith("_cpu") and isinstance(v, torch.Tensor):
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replace_tensor(self, k, k[:-4])
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for k, v in vars(self.input_batch).items():
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if k.endswith("_cpu_tensor") and isinstance(v, torch.Tensor):
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replace_tensor(self.input_batch, k, k[:-11])
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for k, v in vars(self.input_batch.block_table).items():
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if k.endswith("_cpu") and isinstance(v, torch.Tensor):
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replace_tensor(self.input_batch.block_table, k, k[:-4])
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def load_model(self) -> None:
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logger.info("Starting to load model %s...", self.model_config.model)
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self.model = get_model(vllm_config=self.vllm_config)
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if self.lora_config:
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self.model = self.load_lora_model(self.model, self.model_config,
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self.scheduler_config,
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self.lora_config, self.device)
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def warming_up_model(self) -> None:
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logger.info("Warming up model for the compilation...")
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# Only generate graph for the generic shape
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self._dummy_run(max(16, self.max_num_reqs))
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logger.info("Warming up done.")
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def _init_device_properties(self) -> None:
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pass
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def _sync_device(self) -> None:
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pass
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@contextmanager
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def _set_global_compilation_settings():
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import torch._inductor.config
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# Note: The CPPGEMM backend requires freezing parameters.
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freezing_value = torch._inductor.config.freezing
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torch._inductor.config.freezing = True
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# Note: workaround for "ValueError: fast mode: can't pickle cyclic objects
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# including object type dict"
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force_disable_caches = torch._inductor.config.force_disable_caches
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torch._inductor.config.force_disable_caches = True
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yield
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torch._inductor.config.freezing = freezing_value
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torch._inductor.config.force_disable_caches = force_disable_caches
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