[feat](eplb): support eplb on rocm platform

vllm/config/parallel.py

@@ -267,7 +267,7 @@ def _validate_parallel_config(self) -> Self:
             )
 
         if self.enable_eplb:
-            if not current_platform.is_cuda():
+            if not (current_platform.is_cuda() or current_platform.is_rocm()):
                 raise ValueError(
                     "Expert parallelism load balancing is only supported on "
                     "CUDA devices now."

vllm/distributed/eplb/eplb_state.py

@@ -429,6 +429,7 @@ def step(
         # rearrangement step and perform rearrangement to ensure all ranks are
         # performing collective communication.
         self.expert_rearrangement_step += 1
+        print("self.expert_step: ", self.expert_rearrangement_step)
         if self.expert_rearrangement_step >= self.expert_rearrangement_step_interval:
             self.expert_rearrangement_step = 0
             self.rearrange(model)

vllm/distributed/eplb/rebalance_execute.py

@@ -141,6 +141,7 @@ def shuffle_layer(
 
     p2p_ops: list[P2POp] = []
 
+
     # 2. Initiate sending of weights.
     experts_send_loc: dict[int, int] = {}
     for src in range(num_local_experts):
@@ -224,11 +225,42 @@ def shuffle_layer(
             for weight in expert_weights_buffer
         ]
 
+    # op_info = []
+    # for op in p2p_ops:
+    #     if op is None:
+    #         op_info.append(None)
+    #         continue
+
+    #     op_data = {
+    #         'isend': op.op.__name__ == "isend",
+    #         'peer': op.peer,
+    #         'tag': getattr(op, 'tag', 0),
+    #         'tensor_shape': op.tensor.shape,
+    #         'tensor_dtype': op.tensor.dtype,
+    #         'tensor_device': op.tensor.device,
+    #     }
+    #     op_info.append(op_data)
+    # torch.save({"op":op_info}, f"op_info_device_{ep_rank}.pt")
+
     # 4. Execute the P2P operations. The real communication happens here.
     if p2p_ops:
         reqs = batch_isend_irecv(p2p_ops)
         for req in reqs:
             req.wait()
+    # if p2p_ops:
+    #     reqs = []
+    #     for op in p2p_ops:
+    #         if op is None:
+    #             continue
+    #         if op.op.__name__ == "isend":
+    #             print("isend: ", op.peer)
+    #             req = torch.distributed.isend(op.tensor, op.peer, op.group, op.tag)
+    #         else:
+    #             print("irecv: ", op.peer)
+    #             req = torch.distributed.irecv(op.tensor, op.peer, op.group, op.tag)
+    #         reqs.append(req)
+    #     for req in reqs:
+    #         req.wait()
 
     # 5. Copy the weights from the buffer back to the original weights.
     for dst in range(num_local_experts):
@@ -325,6 +357,7 @@ def rearrange_expert_weights_inplace(
         # NOTE(bowen): We need this synchronize to run, but I don't know why.
         # If you figure out the reason, please let me know -- thank you!
         torch.cuda.synchronize()
+        print("layer: ", layer)
         shuffle_layer(
             num_local_physical_experts,
             ep_rank,

vllm/model_executor/layers/fused_moe/layer.py

@@ -1271,17 +1271,17 @@
         if self.enable_eplb:
             from vllm.model_executor.layers.quantization.fp8 import Fp8MoEMethod
 
-            if not isinstance(quant_method, (Fp8MoEMethod, UnquantizedFusedMoEMethod)):
-                # TODO: Add support for additional quantization methods.
-                # The implementation for other quantization methods does not
-                # contain essential differences, but the current quant API
-                # design causes duplicated work when extending to new
-                # quantization methods, so I'm leaving it for now.
-                # If you plan to add support for more quantization methods,
-                # please refer to the implementation in `Fp8MoEMethod`.
-                raise NotImplementedError(
-                    "EPLB is only supported for FP8 quantization for now."
-                )
+            # if not isinstance(quant_method, (Fp8MoEMethod, UnquantizedFusedMoEMethod)):
+            #     # TODO: Add support for additional quantization methods.
+            #     # The implementation for other quantization methods does not
+            #     # contain essential differences, but the current quant API
+            #     # design causes duplicated work when extending to new
+            #     # quantization methods, so I'm leaving it for now.
+            #     # If you plan to add support for more quantization methods,
+            #     # please refer to the implementation in `Fp8MoEMethod`.
+            #     raise NotImplementedError(
+            #         "EPLB is only supported for FP8 quantization for now."
+            #     )
 
         moe_quant_params = {
             "num_experts": self.local_num_experts,
@@ -1890,7 +1890,7 @@
 
     def get_expert_weights(self) -> Iterable[torch.Tensor]:
         weights = list(self.named_parameters())
-        assert all(weight.is_contiguous() for _, weight in weights)
+        # assert all(weight.is_contiguous() for _, weight in weights)
 
         # Filter out the non-expert weights.
         # `e_score_correction_bias` is a bias for each logical expert,

vllm/model_executor/layers/quantization/compressed_tensors/compressed_tensors_moe.py

@@ -1037,10 +1037,16 @@ def apply(
         logical_to_physical_map: torch.Tensor | None = None,
         logical_replica_count: torch.Tensor | None = None,
     ) -> torch.Tensor | tuple[torch.Tensor, torch.Tensor]:
+        # if enable_eplb:
+        #     raise NotImplementedError(
+        #         "EPLB not supported for `CompressedTensorsW8A8Fp8MoEMethod` yet."
+        #     )
+
         if enable_eplb:
-            raise NotImplementedError(
-                "EPLB not supported for `CompressedTensorsW8A8Fp8MoEMethod` yet."
-            )
+            assert expert_load_view is not None
+            assert logical_to_physical_map is not None
+            assert logical_replica_count is not None
+            assert isinstance(layer, FusedMoE)
 
         topk_weights, topk_ids, _ = FusedMoE.select_experts(
             hidden_states=x,
@@ -1056,6 +1062,11 @@ def apply(
             e_score_correction_bias=e_score_correction_bias,
             indices_type=self.topk_indices_dtype,
             num_fused_shared_experts=layer.num_fused_shared_experts,
+            enable_eplb=enable_eplb,
+            expert_map=expert_map,
+            expert_load_view=expert_load_view,
+            logical_to_physical_map=logical_to_physical_map,
+            logical_replica_count=logical_replica_count,
         )
 
         per_act_token = self.input_quant.strategy == QuantizationStrategy.TOKEN

vllm/model_executor/layers/quantization/utils/w8a8_utils.py

@@ -503,6 +503,13 @@ def __init__(
             and current_platform.is_fp8_fnuz()
             and pad_output is not True
         )
+        # if pad_output:
+        #    print("aa")
+        self.pad_output = pad_output
+        self.aiter = envs.VLLM_ROCM_USE_AITER
+        self.rocm = envs.VLLM_ROCM_USE_AITER_LINEAR
+        self.pla = current_platform.is_rocm()
+        self.f8 = current_platform.is_fp8_fnuz()
 
         if self.use_aiter_and_is_supported:
             self.preferred_backend = "aiter"
@@ -515,6 +522,7 @@ def __init__(
                 self.preferred_backend = "cutlass"
         else:
             self.preferred_backend = "torch"
+        self.bak = self.preferred_backend
 
         # Note: we pad the input because torch._scaled_mm is more performant
         # for matrices with batch dimension > 16.