misc cleanups to prepare for rebase

Signed-off-by: Sage Moore <sage@neuralmagic.com>

vllm/compilation/backends.py

@@ -740,7 +740,7 @@ class PiecewiseBackend:
             # manage the memory during cuda graph capture
             return output
 
-        if self.is_debugging_mode or envs.VLLM_CUDAGRAPH_SANITIZER:
+        if self.is_debugging_mode:
             # check if the input addresses are the same
             new_input_addresses = [
                 x.data_ptr() for x in args if isinstance(x, torch.Tensor)

vllm/distributed/parallel_state.py

@@ -972,9 +972,7 @@ def pplx_finalize():
         logger.debug("PPLX NVSHMEM finalize")
         from vllm.model_executor.layers.fused_moe.layer import (
             _all_to_all_cache)
-        for cache in _all_to_all_cache:
-            cache.destroy()
-        # _all_to_all_cache.destroy()
+        _all_to_all_cache.destroy()
         nvshmem_finalize()
 
 

vllm/envs.py

@@ -117,7 +117,6 @@ if TYPE_CHECKING:
     VLLM_NIXL_SIDE_CHANNEL_HOST: str = "localhost"
     VLLM_NIXL_SIDE_CHANNEL_PORT: int = 5557
     VLLM_ALL2ALL_BACKEND: str = "naive"
-    VLLM_CUDAGRAPH_SANITIZER: bool = False
 
 
 def get_default_cache_root():

vllm/model_executor/layers/fused_moe/layer.py

@@ -306,24 +306,13 @@ class AllToAllCache:
                 self._cache[key] = instance
             return instance
 
-
-from typing import List
-_all_to_all_cache: List[AllToAllCache] = [AllToAllCache(), AllToAllCache()]
+# Global singleton
+_all_to_all_cache = AllToAllCache()
 
 
-# Factory function with cache ID support
-def get_all_to_all(cache_id: int, **kwargs):
-    """Get or create an AllToAll instance from the specified cache.
-    
-    Args:
-        cache_id: Integer ID of the cache to use (0 or 1)
-        **kwargs: Arguments passed to AllToAll creation
-        
-    Returns:
-        AllToAll instance from the specified cache
-    """
-    assert cache_id in (0, 1), f"cache_id must be 0 or 1, got {cache_id}"
-    return _all_to_all_cache[cache_id].get_or_create(**kwargs)
+# Factory function as a cleaner interface
+def get_all_to_all(**kwargs):
+    return _all_to_all_cache.get_or_create(**kwargs)
 
 
 @CustomOp.register("unquantized_fused_moe")
@@ -453,8 +442,7 @@ class UnquantizedFusedMoEMethod(FusedMoEMethodBase, CustomOp):
 
         if isinstance(prepare_finalize,
                       (BatchedPrepareAndFinalize, PplxPrepareAndFinalize)):
-            # print("BatchedTritonExperts %s", self.moe)
-            
+            logger.debug("BatchedTritonExperts %s", self.moe)
             experts = BatchedTritonExperts(
                 max_num_tokens=MOE_DP_CHUNK_SIZE,
                 world_size=world_size,
@@ -466,7 +454,7 @@ class UnquantizedFusedMoEMethod(FusedMoEMethodBase, CustomOp):
                 block_shape=None,
             )
         else:
-            # print("TritonExperts %s", self.moe)
+            logger.debug("TritonExperts %s", self.moe)
             experts = TritonExperts(
                 use_fp8_w8a8=False,
                 use_int8_w8a8=False,
@@ -702,26 +690,25 @@ def _construct_prepare_finalize(
 
     if moe.use_pplx_kernels:
         logger.debug("using PplxPrepareAndFinalize")
- 
-        kwargs =  {
-            "max_num_tokens" :max_num_tokens,
-            "num_experts" :moe.num_experts,
-            "experts_per_token" :moe.experts_per_token,  # topk
-            "rank" :rank,
-            "world_size" :world_size,
-            "dp_size" :dp_size,
-            "hidden_dim":moe.hidden_dim,
-            "hidden_dim_bytes" :moe.hidden_dim * moe.in_dtype.itemsize,
-            "hidden_dim_scale_bytes" :(0 if moe.in_dtype.itemsize != 1 else
+
+        all_to_all = get_all_to_all(
+            max_num_tokens=max_num_tokens,
+            num_experts=moe.num_experts,
+            experts_per_token=moe.experts_per_token,  # topk
+            rank=rank,
+            world_size=world_size,
+            dp_size=dp_size,
+            hidden_dim=moe.hidden_dim,
+            hidden_dim_bytes=moe.hidden_dim * moe.in_dtype.itemsize,
+            # For blocked per token: set to
+            #   ceil_div(hidden_dim, block_size) * sizeof(float32)
+            # For per-token: set to sizeof(float32)
+            hidden_dim_scale_bytes=(0 if moe.in_dtype.itemsize != 1 else
                                     ((moe.hidden_dim + moe.block_size - 1) //
-                                     moe.block_size * torch.float32.itemsize)),
-        }
-
-
-        a2as = [get_all_to_all(0, **kwargs),  get_all_to_all(1, **kwargs)]
+                                     moe.block_size * torch.float32.itemsize)))
 
         return PplxPrepareAndFinalize(
-            a2as,
+            all_to_all,
             max_num_tokens=max_num_tokens,
             world_size=world_size,
             rank=rank,
@@ -1311,9 +1298,6 @@ class FusedMoE(torch.nn.Module):
         max_tokens_across_dp = ctx.dp_metadata.max_tokens_across_dp_cpu
         moe_dp_chunk_size_per_rank = MOE_DP_CHUNK_SIZE
 
-        # if (ubatch_ctdx := get_current_ubatch_context()) is not None:
-        #     print("in fused moe, ubatch:", ubatch_ctdx.id, "chunk size:", max_tokens_across_dp, "moe_dp_chunk_size_per_rank", moe_dp_chunk_size_per_rank)
-
         num_tokens = full_hidden_states.size(0)
         for chunk_start_ in range(0, max_tokens_across_dp,
                                   moe_dp_chunk_size_per_rank):
@@ -1412,8 +1396,6 @@ def moe_forward(hidden_states: torch.Tensor, router_logits: torch.Tensor,
     forward_context: ForwardContext = get_forward_context()
     self = forward_context.no_compile_layers[layer_name]
     assert self.quant_method is not None
-    # if (ubatch_ctx := get_current_ubatch_context()) is not None:
-    #     print("in fused moe, ubatch:", ubatch_ctx.id, self)
 
     return self.forward_impl(hidden_states, router_logits)