refactor: communication module (#1162)

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## 📌 Description

Separate communication kernels from different sources.

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Author: yyihuang

flashinfer/aot.py

@@ -10,7 +10,7 @@
 
 from .activation import act_func_def_str, gen_act_and_mul_module
 from .cascade import gen_cascade_module
-from .comm import gen_comm_module
+from .comm import gen_trtllm_comm_module, gen_vllm_comm_module
 from .fp4_quantization import gen_fp4_quantization_sm100_module
 from .fused_moe import gen_fused_moe_sm100_module
 from .gemm import gen_gemm_module, gen_gemm_sm90_module, gen_gemm_sm100_module
@@ -327,7 +327,8 @@ def gen_all_modules(
 
     jit_specs += [
         gen_cascade_module(),
-        gen_comm_module(),
+        gen_vllm_comm_module(),
+        gen_trtllm_comm_module(),
         gen_norm_module(),
         gen_page_module(),
         gen_quantization_module(),

flashinfer/comm.py

@@ -264,12 +264,20 @@ def cudaIpcOpenMemHandle(self, handle: cudaIpcMemHandle_t) -> ctypes.c_void_p:
 cudart = CudaRTLibrary()
 
 
-def gen_comm_module() -> JitSpec:
+def gen_vllm_comm_module() -> JitSpec:
     return gen_jit_spec(
-        "comm",
+        "vllm_comm",
         [
             jit_env.FLASHINFER_CSRC_DIR / "comm_pybind.cu",
             jit_env.FLASHINFER_CSRC_DIR / "custom_all_reduce.cu",
+        ],
+    )
+
+
+def gen_trtllm_comm_module() -> JitSpec:
+    return gen_jit_spec(
+        "trtllm_comm",
+        [
             jit_env.FLASHINFER_CSRC_DIR / "trtllm_allreduce.cu",
             jit_env.FLASHINFER_CSRC_DIR / "trtllm_allreduce_fusion.cu",
             jit_env.FLASHINFER_CSRC_DIR / "trtllm_moe_allreduce_fusion.cu",
@@ -279,8 +287,8 @@ def gen_comm_module() -> JitSpec:
 
 
 @functools.cache
-def get_comm_module():
-    module = gen_comm_module().build_and_load()
+def get_vllm_comm_module():
+    module = gen_vllm_comm_module().build_and_load()
 
     # torch library for all
     @register_custom_op(
@@ -333,6 +341,21 @@ def all_reduce(
     ) -> None:
         module.all_reduce(fa, inp, out, reg_buffer, reg_buffer_sz_bytes, num_ctas)
 
+    return SimpleNamespace(
+        init_custom_ar=init_custom_ar,
+        dispose=dispose,
+        get_graph_buffer_ipc_meta=get_graph_buffer_ipc_meta,
+        register_buffer=register_buffer,
+        register_graph_buffers=register_graph_buffers,
+        meta_size=meta_size,
+        all_reduce=all_reduce,
+    )
+
+
+@functools.cache
+def get_trtllm_comm_module():
+    module = gen_trtllm_comm_module().build_and_load()
+
     @register_custom_op(
         "flashinfer::trtllm_lamport_initialize", mutates_args=["buffer"]
     )
@@ -577,13 +600,6 @@ def trtllm_moe_allreduce_fusion(
         )
 
     return SimpleNamespace(
-        init_custom_ar=init_custom_ar,
-        dispose=dispose,
-        get_graph_buffer_ipc_meta=get_graph_buffer_ipc_meta,
-        register_buffer=register_buffer,
-        register_graph_buffers=register_graph_buffers,
-        meta_size=meta_size,
-        all_reduce=all_reduce,
         trtllm_lamport_initialize=trtllm_lamport_initialize,
         trtllm_lamport_initialize_all=trtllm_lamport_initialize_all,
         trtllm_custom_all_reduce=trtllm_custom_all_reduce,
@@ -595,11 +611,13 @@ def trtllm_moe_allreduce_fusion(
 def init_custom_ar(
     ipc_tensors: List[int], rank_data: torch.Tensor, rank: int, full_nvlink: bool
 ) -> int:
-    return get_comm_module().init_custom_ar(ipc_tensors, rank_data, rank, full_nvlink)
+    return get_vllm_comm_module().init_custom_ar(
+        ipc_tensors, rank_data, rank, full_nvlink
+    )
 
 
 def dispose(fa: int) -> None:
-    get_comm_module().dispose(fa)
+    get_vllm_comm_module().dispose(fa)
 
 
 def all_reduce(
@@ -621,27 +639,27 @@ def all_reduce(
         num_ctas: The number of CTAs to use for the all reduce.
         CTA upper bounds: 36. Generally, we can saturate the bandwidth even with small amount the SMs.
     """
-    get_comm_module().all_reduce(
+    get_vllm_comm_module().all_reduce(
         fa, inp, out, reg_buffer, reg_buffer_sz_bytes, num_ctas
     )
 
 
 def get_graph_buffer_ipc_meta(fa) -> Tuple[List[int], List[int]]:
-    return get_comm_module().get_graph_buffer_ipc_meta(fa)
+    return get_vllm_comm_module().get_graph_buffer_ipc_meta(fa)
 
 
 def register_buffer(fa: int, fake_ipc_ptrs: List[int]) -> None:
-    return get_comm_module().register_buffer(fa, fake_ipc_ptrs)
+    return get_vllm_comm_module().register_buffer(fa, fake_ipc_ptrs)
 
 
 def register_graph_buffers(
     fa: int, handles: List[List[int]], offsets: List[List[int]]
 ) -> None:
-    get_comm_module().register_graph_buffers(fa, handles, offsets)
+    get_vllm_comm_module().register_graph_buffers(fa, handles, offsets)
 
 
 def meta_size() -> int:
-    return get_comm_module().meta_size()
+    return get_vllm_comm_module().meta_size()
 
 
 def create_shared_buffer(
@@ -913,7 +931,7 @@ def pad_up(x, y):
 
 
 def trtllm_lamport_initialize(buffer_ptr: int, size: int, dtype: torch.dtype) -> None:
-    get_comm_module().trtllm_lamport_initialize(buffer_ptr, size, dtype)
+    get_trtllm_comm_module().trtllm_lamport_initialize(buffer_ptr, size, dtype)
 
 
 def trtllm_lamport_initialize_all(
@@ -923,7 +941,7 @@ def trtllm_lamport_initialize_all(
     size: int,
     dtype: torch.dtype,
 ) -> None:
-    get_comm_module().trtllm_lamport_initialize_all(
+    get_trtllm_comm_module().trtllm_lamport_initialize_all(
         buffer_0_ptr, buffer_1_ptr, buffer_2_ptr, size, dtype
     )
 
@@ -952,7 +970,7 @@ def trtllm_custom_all_reduce(
     lamport_peer_comm_buffer_ptrs_1: Optional[torch.Tensor],
     lamport_peer_comm_buffer_ptrs_2: Optional[torch.Tensor],
 ) -> None:
-    get_comm_module().trtllm_custom_all_reduce(
+    get_trtllm_comm_module().trtllm_custom_all_reduce(
         inp,
         out,
         tp_size,
@@ -1001,7 +1019,7 @@ def trtllm_allreduce_fusion(
     scale_factor: Optional[float],
     layout_code: Optional[FP4QuantizationSFLayout],
 ) -> None:
-    get_comm_module().trtllm_allreduce_fusion(
+    get_trtllm_comm_module().trtllm_allreduce_fusion(
         allreduce_in=allreduce_in,
         world_size=world_size,
         world_rank=world_rank,
@@ -1048,7 +1066,7 @@ def trtllm_moe_allreduce_fusion(
     quant_out: Optional[torch.Tensor],
     scale_out: Optional[torch.Tensor],
 ) -> None:
-    get_comm_module().trtllm_moe_allreduce_fusion(
+    get_trtllm_comm_module().trtllm_moe_allreduce_fusion(
         world_size=world_size,
         world_rank=world_rank,
         token_num=token_num,