[Fix] Fix update_aclgraph_sizes when running MoE models (#913)

### What this PR does / why we need it?
Fix update_aclgraph_sizes when running MoE models.

---------

Signed-off-by: Yizhou Liu <liu_yizhou@outlook.com>

vllm_ascend/distributed/parallel_state.py

@@ -22,18 +22,17 @@ def get_etp_group() -> GroupCoordinator:
 
 
 def init_ascend_model_parallel(
-    tensor_model_parallel_size: int = 1,
+    expert_parallel_size: int = 1,
-    pipeline_model_parallel_size: int = 1,
     expert_tensor_parallel_size: int = 1,
+    world_size: Optional[int] = None,
     backend: Optional[str] = None,
 ):
     assert torch.distributed.is_initialized()
-    world_size: int = torch.distributed.get_world_size()
+    world_size = world_size or torch.distributed.get_world_size()
     backend = backend or torch.distributed.get_backend(
         get_world_group().device_group)
-    num_expert_parallel_groups: int = expert_tensor_parallel_size
+    num_expert_parallel_groups = expert_tensor_parallel_size
-    num_expert_tensor_parallel_groups: int = (world_size //
+    num_expert_tensor_parallel_groups = expert_parallel_size
-                                              expert_tensor_parallel_size)
 
     global _EP
     group_ranks = []

vllm_ascend/platform.py

@@ -119,6 +119,26 @@ class NPUPlatform(Platform):
         from vllm.config import CompilationLevel  # noqa: E402
         compilation_config = vllm_config.compilation_config
         model_config = vllm_config.model_config
+        additional_config = vllm_config.additional_config
+        parallel_config = vllm_config.parallel_config
+        cache_config = vllm_config.cache_config
+
+        if parallel_config:
+            # Default value for expert tensor parallel size
+            parallel_config.expert_tensor_parallel_size = parallel_config.tensor_parallel_size
+
+            # NOTE: When enable_expert_parallel is True, we follow vLLM convention:
+            # ep_size = world_size, which means expert_tensor_parallel_size must be 1
+            if (additional_config
+                    and "expert_tensor_parallel_size" in additional_config
+                    and not parallel_config.enable_expert_parallel):
+                parallel_config.expert_tensor_parallel_size = int(
+                    additional_config["expert_tensor_parallel_size"])
+
+            # Calculate expert parallel size based on world size
+            parallel_config.expert_parallel_size = (
+                parallel_config.world_size //
+                parallel_config.expert_tensor_parallel_size)
 
         if model_config is None:
             logger.warning("Model config is missing. This may indicate "
@@ -127,9 +147,9 @@ class NPUPlatform(Platform):
         else:
             enforce_eager = getattr(model_config, "enforce_eager", False)
 
-        if vllm_config.additional_config is not None:
+        if additional_config is not None:
-            enable_graph_mode = vllm_config.additional_config.get(
+            enable_graph_mode = additional_config.get("enable_graph_mode",
-                "enable_graph_mode", False)
+                                                      False)
             if enable_graph_mode:
                 if enforce_eager:
                     raise RuntimeError(
@@ -139,7 +159,7 @@ class NPUPlatform(Platform):
                     logger.warning(
                         "NPU graph mode is still experimental and not supported for V1 without mla currently, "
                         "it has been disabled automatically.")
-                    vllm_config.additional_config["enable_graph_mode"] = False
+                    additional_config["enable_graph_mode"] = False
                 if model_config:
                     model_type = model_config.hf_config.model_type
                     if "deepseek" not in model_type:
@@ -178,7 +198,6 @@ class NPUPlatform(Platform):
                 ["vllm.unified_ascend_attention_with_output"])
             update_aclgraph_sizes(vllm_config)
 
-        parallel_config = vllm_config.parallel_config
         if parallel_config and parallel_config.worker_cls == "auto":
             if envs.VLLM_USE_V1:
                 parallel_config.worker_cls = "vllm_ascend.worker.worker_v1.NPUWorker"
@@ -190,7 +209,6 @@ class NPUPlatform(Platform):
             else:
                 parallel_config.worker_cls = "vllm_ascend.worker.worker.NPUWorker"
 
-        cache_config = vllm_config.cache_config
         if cache_config:
             if cache_config.block_size is None:
                 cache_config.block_size = 128
@@ -202,11 +220,10 @@ class NPUPlatform(Platform):
 
         if envs.VLLM_USE_V1:
             # Activate custom ops for v1.
-            vllm_config.compilation_config.custom_ops = ["all"]
+            compilation_config.custom_ops = ["all"]
             # If ascend_scheduler_config exists in additional_config,
             # extents original scheduler_config to use AscendScheduler.
 
-            additional_config = vllm_config.additional_config
             if additional_config and additional_config.get(
                     "ascend_scheduler_config", None) is not None:
                 additional_scheduler_config = additional_config.get(

vllm_ascend/utils.py

@@ -126,14 +126,16 @@ def update_aclgraph_sizes(vllm_config: VllmConfig) -> None:
     original_sizes, compilation_config.cudagraph_capture_sizes = \
         compilation_config.cudagraph_capture_sizes, None
 
-    # Calculate parallel configuration factor (increases with DP or TP)
+    # Calculate parallel configuration factor
-    # TODO(Yizhou): This is a temporary solution, need to be improved
-    # in the future, taking into account the other parallel configurations.
     num_hidden_layers = vllm_config.model_config.hf_config.num_hidden_layers
     parallel_config = vllm_config.parallel_config
+
+    # TODO: Find out whether we need to take into account the pp_size
     parallel_factor = 1 + sum(size > 1 for size in [
-        parallel_config.data_parallel_size,
+        parallel_config.data_parallel_size_local,
-        parallel_config.tensor_parallel_size
+        parallel_config.tensor_parallel_size,
+        parallel_config.expert_parallel_size,
+        parallel_config.expert_tensor_parallel_size,
     ])
 
     # Calculate maximum supported batch sizes considering model architecture

vllm_ascend/worker/worker.py

@@ -534,7 +534,6 @@ class NPUWorker(LocalOrDistributedWorkerBase):
             backend: str = "hccl") -> None:
         """Initialize the distributed environment."""
         parallel_config = self.parallel_config
-        additional_config = self.vllm_config.additional_config
         set_custom_all_reduce(not parallel_config.disable_custom_all_reduce)
         init_distributed_environment(parallel_config.world_size, rank,
                                      distributed_init_method, local_rank,
@@ -542,13 +541,11 @@ class NPUWorker(LocalOrDistributedWorkerBase):
         ensure_model_parallel_initialized(
             parallel_config.tensor_parallel_size,
             parallel_config.pipeline_parallel_size)
-        expert_tensor_parallel_size = 1
+        init_ascend_model_parallel(
-        if additional_config:
+            parallel_config.expert_parallel_size,
-            expert_tensor_parallel_size = additional_config.get(
+            parallel_config.expert_tensor_parallel_size,
-                "expert_tensor_parallel_size", 1)
+            parallel_config.world_size,
-        init_ascend_model_parallel(parallel_config.tensor_parallel_size,
+        )
-                                   parallel_config.pipeline_parallel_size,
-                                   expert_tensor_parallel_size)
         ensure_kv_transfer_initialized(vllm_config)
 
 

vllm_ascend/worker/worker_v1.py

@@ -234,7 +234,6 @@ class NPUWorker(WorkerBase):
 
     def _init_worker_distributed_environment(self) -> None:
         """Initialize the distributed environment."""
-        additional_config = self.vllm_config.additional_config
         parallel_config = self.vllm_config.parallel_config
         set_custom_all_reduce(
             not self.parallel_config.disable_custom_all_reduce)
@@ -244,13 +243,11 @@ class NPUWorker(WorkerBase):
         ensure_model_parallel_initialized(
             self.parallel_config.tensor_parallel_size,
             self.parallel_config.pipeline_parallel_size)
-        expert_tensor_parallel_size = 1
+        init_ascend_model_parallel(
-        if additional_config is not None and "expert_tensor_parallel_size" in additional_config:
+            parallel_config.expert_parallel_size,
-            expert_tensor_parallel_size = int(
+            parallel_config.expert_tensor_parallel_size,
-                additional_config["expert_tensor_parallel_size"])
+            parallel_config.world_size,
-        init_ascend_model_parallel(parallel_config.tensor_parallel_size,
+        )
-                                   parallel_config.pipeline_parallel_size,
-                                   expert_tensor_parallel_size)
         ensure_kv_transfer_initialized(self.vllm_config)
 
     def _init_profiler(self):