Add profile execute duration observation

Author: depeng1994

vllm_ascend/envs.py

@@ -36,6 +36,8 @@
     lambda: bool(int(os.getenv("COMPILE_CUSTOM_KERNELS", "1"))),
     "VLLM_ENABLE_MC2":
     lambda: bool(int(os.getenv("VLLM_ENABLE_MC2", '0'))),
+    "VLLM_MODEL_EXECUTE_TIME_OBSERVE":
+    lambda: bool(int(os.getenv("VLLM_MODEL_EXECUTE_TIME_OBSERVE", '0'))),
     "USING_LCCL_COM":
     lambda: bool(int(os.getenv("USING_LCCL_COM", '0'))),
     "SOC_VERSION":

vllm_ascend/utils.py

@@ -17,11 +17,15 @@
 # Adapted from vllm-project/vllm/vllm/worker/worker.py
 #
 
+import atexit
 import math
-from typing import TYPE_CHECKING
+from contextlib import contextmanager
+from threading import Lock
+from typing import TYPE_CHECKING, List, Tuple
 
 import torch
 from packaging.version import InvalidVersion, Version
+from torch_npu.npu.streams import Event
 from vllm.logger import logger
 
 import vllm_ascend.envs as envs
@@ -173,3 +177,51 @@ def update_aclgraph_sizes(vllm_config: VllmConfig) -> None:
 
 def dispose_tensor(x: torch.Tensor):
     x.set_(torch.empty((0, ), device=x.device, dtype=x.dtype))
+
+
+class ProfileExecuteDuration:
+    _instance = None
+    _observations: List[Tuple[str, Event, Event]] = []
+    _lock = Lock()
+
+    def __new__(cls):
+        with cls._lock:
+            if cls._instance is None:
+                cls._instance = super().__new__(cls)
+                atexit.register(cls._instance.destroy)
+            return cls._instance
+
+    def destroy(self):
+        with self._lock:
+            self._observations.clear()
+
+    @contextmanager
+    def capture_async(self, duration_tag: str):
+        if not envs.VLLM_MODEL_EXECUTE_TIME_OBSERVE:
+            yield
+            return
+
+        observe_start = Event(enable_timing=True)
+        observe_start.record()
+        try:
+            yield
+        finally:
+            observe_end = Event(enable_timing=True)
+            observe_end.record()
+            with self._lock:
+                self._observations.append(
+                    (duration_tag, observe_start, observe_end))
+
+    def pop_captured_sync(self, captured_name: str):
+        """Pop and synchronize all events in the observation list, print all duration"""
+        if not envs.VLLM_MODEL_EXECUTE_TIME_OBSERVE:
+            return
+
+        log = f"Profile execute duration [{captured_name}]:"
+        while self._observations:
+            with self._lock:
+                tag, observe_start, observe_end = self._observations.pop()
+            observe_end.synchronize()
+            duration = observe_start.elapsed_time(observe_end)
+            log += f" [{tag}]:{duration:.2f}ms"
+        print(log)

vllm_ascend/worker/model_runner_v1.py

@@ -61,6 +61,7 @@
 from vllm_ascend.attention.attention_v1 import AscendAttentionState
 from vllm_ascend.platform import NPUPlatform
 from vllm_ascend.sample.rejection_sampler import AscendRejectionSampler
+from vllm_ascend.utils import ProfileExecuteDuration
 
 if TYPE_CHECKING:
     import xgrammar as xgr  # type: ignore[import-untyped]
@@ -628,36 +629,38 @@ def _process_reqs(
         with set_forward_context(attn_metadata,
                                  self.vllm_config,
                                  num_tokens=num_input_tokens):
-            model_kwargs = {}
-            if self.enable_torchair_graph_mode:
-                model_kwargs["kv_caches"] = self.kv_caches
-                model_kwargs["attn_metadata"] = attn_metadata
-            if self.enable_torchair_graph_mode and attn_metadata.attn_state == AscendAttentionState.DecodeOnly:
-                torch._dynamo.mark_static(input_ids)
-                torch._dynamo.mark_static(positions)
-                torch._dynamo.mark_static(attn_metadata.decode.block_table)
-                torch._dynamo.mark_static(attn_metadata.decode.input_positions)
-                torch._dynamo.mark_static(attn_metadata.slot_mapping)
-                for kv in self.kv_caches:
-                    if isinstance(kv, tuple):
-                        torch._dynamo.mark_static(kv[0])
-                        torch._dynamo.mark_static(kv[1])
-                hidden_states = self.compile_model(
-                    input_ids=input_ids,
-                    positions=positions,
-                    intermediate_tensors=intermediate_tensors,
-                    inputs_embeds=None,
-                    **model_kwargs,
-                )
-            else:
-                assert self.model is not None
-                hidden_states = self.model(
-                    input_ids=input_ids,
-                    positions=positions,
-                    intermediate_tensors=intermediate_tensors,
-                    inputs_embeds=None,
-                    **model_kwargs,
-                )
+            with ProfileExecuteDuration().capture_async("forward"):
+                model_kwargs = {}
+                if self.enable_torchair_graph_mode:
+                    model_kwargs["kv_caches"] = self.kv_caches
+                    model_kwargs["attn_metadata"] = attn_metadata
+                if self.enable_torchair_graph_mode and attn_metadata.attn_state == AscendAttentionState.DecodeOnly:
+                    torch._dynamo.mark_static(input_ids)
+                    torch._dynamo.mark_static(positions)
+                    torch._dynamo.mark_static(attn_metadata.decode.block_table)
+                    torch._dynamo.mark_static(
+                        attn_metadata.decode.input_positions)
+                    torch._dynamo.mark_static(attn_metadata.slot_mapping)
+                    for kv in self.kv_caches:
+                        if isinstance(kv, tuple):
+                            torch._dynamo.mark_static(kv[0])
+                            torch._dynamo.mark_static(kv[1])
+                    hidden_states = self.compile_model(
+                        input_ids=input_ids,
+                        positions=positions,
+                        intermediate_tensors=intermediate_tensors,
+                        inputs_embeds=None,
+                        **model_kwargs,
+                    )
+                else:
+                    assert self.model is not None
+                    hidden_states = self.model(
+                        input_ids=input_ids,
+                        positions=positions,
+                        intermediate_tensors=intermediate_tensors,
+                        inputs_embeds=None,
+                        **model_kwargs,
+                    )
 
         use_spec_decode = len(
             scheduler_output.scheduled_spec_decode_tokens) > 0
@@ -844,103 +847,113 @@ def execute_model(
         scheduler_output: "SchedulerOutput",
         intermediate_tensors: Optional[IntermediateTensors] = None,
     ) -> Union[ModelRunnerOutput, torch.Tensor]:
-        self._update_states(scheduler_output)
-        if not scheduler_output.total_num_scheduled_tokens:
-            # Return empty ModelRunnerOuptut if there's no work to do.
-            return EMPTY_MODEL_RUNNER_OUTPUT
-        (attn_metadata, hidden_states, spec_decode_metadata, positions,
-         num_scheduled_tokens,
-         sample_indices) = (self._process_reqs(scheduler_output,
-                                               intermediate_tensors))
-        logits = self.model.compute_logits(hidden_states[sample_indices], None)
-
-        # Apply structured output bitmasks if present
-        if scheduler_output.grammar_bitmask is not None:
-            logits = self.apply_grammar_bitmask(scheduler_output, logits)
-
-        # Sample the next token and get logprobs if needed.
-        sampling_metadata = self.input_batch.sampling_metadata
-        if spec_decode_metadata is None:
-            sampler_output = self.sampler(
-                logits=logits,
-                sampling_metadata=sampling_metadata,
-            )
-        else:
-            # When indexing with a tensor (bonus_logits_indices), PyTorch
-            # creates a new tensor with separate storage from the original
-            # logits tensor. This means any in-place operations on bonus_logits
-            # won't affect the original logits tensor.
-            bonus_logits = logits[spec_decode_metadata.bonus_logits_indices]
-            sampler_output = self.sampler(
-                logits=bonus_logits,
-                sampling_metadata=sampling_metadata,
-            )
-            bonus_token_ids = sampler_output.sampled_token_ids
+        with ProfileExecuteDuration().capture_async(
+                "prepare input and forward"):
+            self._update_states(scheduler_output)
+            if not scheduler_output.total_num_scheduled_tokens:
+                # Return empty ModelRunnerOuptut if there's no work to do.
+                return EMPTY_MODEL_RUNNER_OUTPUT
+            (attn_metadata, hidden_states, spec_decode_metadata, positions,
+             num_scheduled_tokens,
+             sample_indices) = (self._process_reqs(scheduler_output,
+                                                   intermediate_tensors))
+
+        with ProfileExecuteDuration().capture_async("post process"):
+            logits = self.model.compute_logits(hidden_states[sample_indices],
+                                               None)
+
+            # Apply structured output bitmasks if present
+            if scheduler_output.grammar_bitmask is not None:
+                logits = self.apply_grammar_bitmask(scheduler_output, logits)
+
+            # Sample the next token and get logprobs if needed.
+            sampling_metadata = self.input_batch.sampling_metadata
+            if spec_decode_metadata is None:
+                sampler_output = self.sampler(
+                    logits=logits,
+                    sampling_metadata=sampling_metadata,
+                )
+            else:
+                # When indexing with a tensor (bonus_logits_indices), PyTorch
+                # creates a new tensor with separate storage from the original
+                # logits tensor. This means any in-place operations on bonus_logits
+                # won't affect the original logits tensor.
+                bonus_logits = logits[
+                    spec_decode_metadata.bonus_logits_indices]
+                sampler_output = self.sampler(
+                    logits=bonus_logits,
+                    sampling_metadata=sampling_metadata,
+                )
+                bonus_token_ids = sampler_output.sampled_token_ids
+
+                # Just like `bonus_logits`, `target_logits` is a new tensor with
+                # separate storage from the original `logits` tensor. Therefore,
+                # it is safe to update `target_logits` in place.
+                target_logits = logits[
+                    spec_decode_metadata.target_logits_indices]
+                output_token_ids = self.rejection_sampler(
+                    spec_decode_metadata,
+                    None,  # draft_probs
+                    target_logits,
+                    bonus_token_ids,
+                    sampling_metadata,
+                )
+                sampler_output.sampled_token_ids = output_token_ids
+
+            # TODO(woosuk): The following loop can be slow since it iterates over
+            # the requests one by one. Optimize.
+            for i, req_id in enumerate(self.input_batch.req_ids):
+                req_state = self.requests[req_id]
+                seq_len = (req_state.num_computed_tokens +
+                           scheduler_output.num_scheduled_tokens[req_id])
+                if seq_len < req_state.num_tokens:
+                    # Ignore the sampled token.
+                    # Rewind the generator state as if the token was not sampled.
+                    generator = self.input_batch.generators.get(i)
+                    if generator is not None:
+                        generator.set_offset(generator.get_offset() - 4)
+
+            # NOTE: NPU -> CPU Sync happens here.
+            # Move as many CPU operations as possible before this sync point.
+            logprobs_tensors = sampler_output.logprobs_tensors
+            logprobs_lists = logprobs_tensors.tolists() \
+                if logprobs_tensors is not None else None
+
+            # Get the valid generated tokens.
+            sampled_token_ids = sampler_output.sampled_token_ids
+            max_gen_len = sampled_token_ids.shape[-1]
+            if max_gen_len == 1:
+                # No spec decode tokens.
+                valid_sampled_token_ids = sampled_token_ids.tolist()
+            else:
+                # Includes spec decode tokens.
+                valid_sampled_token_ids = self.rejection_sampler.parse_output(
+                    sampled_token_ids,
+                    self.input_batch.vocab_size,
+                )
 
-            # Just like `bonus_logits`, `target_logits` is a new tensor with
-            # separate storage from the original `logits` tensor. Therefore,
-            # it is safe to update `target_logits` in place.
-            target_logits = logits[spec_decode_metadata.target_logits_indices]
-            output_token_ids = self.rejection_sampler(
-                spec_decode_metadata,
-                None,  # draft_probs
-                target_logits,
-                bonus_token_ids,
+            spec_token_ids = self._get_spec_token_ids(
+                valid_sampled_token_ids,
                 sampling_metadata,
+                scheduler_output,
+                spec_decode_metadata,
+                positions,
+                num_scheduled_tokens,
+                hidden_states,
+                attn_metadata,
             )
-            sampler_output.sampled_token_ids = output_token_ids
 
-        # TODO(woosuk): The following loop can be slow since it iterates over
-        # the requests one by one. Optimize.
-        for i, req_id in enumerate(self.input_batch.req_ids):
-            req_state = self.requests[req_id]
-            seq_len = (req_state.num_computed_tokens +
-                       scheduler_output.num_scheduled_tokens[req_id])
-            if seq_len < req_state.num_tokens:
-                # Ignore the sampled token.
-                # Rewind the generator state as if the token was not sampled.
-                generator = self.input_batch.generators.get(i)
-                if generator is not None:
-                    generator.set_offset(generator.get_offset() - 4)
-
-        # NOTE: NPU -> CPU Sync happens here.
-        # Move as many CPU operations as possible before this sync point.
-        logprobs_tensors = sampler_output.logprobs_tensors
-        logprobs_lists = logprobs_tensors.tolists() \
-            if logprobs_tensors is not None else None
-
-        # Get the valid generated tokens.
-        sampled_token_ids = sampler_output.sampled_token_ids
-        max_gen_len = sampled_token_ids.shape[-1]
-        if max_gen_len == 1:
-            # No spec decode tokens.
-            valid_sampled_token_ids = sampled_token_ids.tolist()
-        else:
-            # Includes spec decode tokens.
-            valid_sampled_token_ids = self.rejection_sampler.parse_output(
-                sampled_token_ids,
-                self.input_batch.vocab_size,
+            model_runner_output = ModelRunnerOutput(
+                req_ids=self.input_batch.req_ids,
+                req_id_to_index=self.input_batch.req_id_to_index,
+                sampled_token_ids=valid_sampled_token_ids,
+                spec_token_ids=spec_token_ids,
+                logprobs=logprobs_lists,
+                prompt_logprobs_dict={},
             )
 
-        spec_token_ids = self._get_spec_token_ids(
-            valid_sampled_token_ids,
-            sampling_metadata,
-            scheduler_output,
-            spec_decode_metadata,
-            positions,
-            num_scheduled_tokens,
-            hidden_states,
-            attn_metadata,
-        )
-
-        model_runner_output = ModelRunnerOutput(
-            req_ids=self.input_batch.req_ids,
-            req_id_to_index=self.input_batch.req_id_to_index,
-            sampled_token_ids=valid_sampled_token_ids,
-            spec_token_ids=spec_token_ids,
-            logprobs=logprobs_lists,
-            prompt_logprobs_dict={},
-        )
+        capture_name = "Decode" if self.attn_state == AscendAttentionState.DecodeOnly else "Prefill"
+        ProfileExecuteDuration().pop_captured_sync(capture_name)
         return model_runner_output
 
     def _profile_multimodal(self) -> None: