[fluid_ops] c_scatter remove FLAGS_dynamic_static_unified_comm (#70717)

co63oc · web-flow · commit dbf9de203ae3 · 2025-01-09T14:48:15.000+08:00
diff --git a/paddle/phi/kernels/gpu/c_scatter_kernel.cu b/paddle/phi/kernels/gpu/c_scatter_kernel.cu
@@ -51,20 +51,8 @@ void CScatterOpCUDAKernel(const Context& dev_ctx,
       common::errors::InvalidArgument(
           "The ring_id (%d) for c_scatter_op must be non-negative.", ring_id));
 
-  const auto& comm_context_manager =
-      phi::distributed::CommContextManager::GetInstance();
-
-  PADDLE_ENFORCE_EQ(comm_context_manager.Has(std::to_string(ring_id)),
-                    true,
-                    common::errors::InvalidArgument(
-                        "You choose to use new communication library by "
-                        "setting environment "
-                        "variable FLAGS_dynamic_static_unified_comm True. "
-                        "But ring_id(%d) is "
-                        "not found in comm_context_manager.",
-                        std::to_string(ring_id)));
-  comm_ctx = static_cast<phi::distributed::NCCLCommContext*>(
-      comm_context_manager.Get(std::to_string(ring_id)));
+  comm_ctx =
+      static_cast<phi::distributed::NCCLCommContext*>(dev_ctx.GetCommContext());
   PADDLE_ENFORCE_NE(comm_ctx,
                     nullptr,
                     common::errors::Unavailable(
