[LLM] First commit the llm deployment code

custom_ops/gpu_ops/share_external_data.cu

@@ -0,0 +1,57 @@
+// Copyright (c) 2025 PaddlePaddle Authors. All Rights Reserved.
+// 
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+// 
+//     http://www.apache.org/licenses/LICENSE-2.0
+// 
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "helper.h"
+#include<stdlib.h>
+#include<string.h>
+#include<sys/types.h>
+#include<sys/stat.h>
+#include<unistd.h>
+#include<fcntl.h>
+#include<sys/mman.h>
+#include<stdio.h>
+#include "cuda_multiprocess.h"
+#include "paddle/phi/core/tensor_meta.h"
+
+
+std::vector<paddle::Tensor> ShareExternalData(paddle::Tensor& input,
+                                              const std::string shm_name,
+                                              const std::vector<int>& shape) {     
+  volatile shmStruct *shm = NULL;
+  sharedMemoryInfo info;
+  if (sharedMemoryOpen(shm_name.c_str(), sizeof(shmStruct), &info) != 0) {
+    printf("Failed to create shared memory slab\n");
+    printf("Func ShareExternalData. Shm_name: %s\n", shm_name.c_str());
+    exit(EXIT_FAILURE);
+  }
+  shm = (volatile shmStruct *)info.addr;
+  void *ptr = nullptr;
+  checkCudaErrors(
+      cudaIpcOpenMemHandle(&ptr,
+                           *(cudaIpcMemHandle_t *)&shm->memHandle,  // NOLINT
+                           cudaIpcMemLazyEnablePeerAccess));
+  paddle::Tensor tmp_tensor = paddle::from_blob(
+    ptr,
+    shape,
+    input.type()
+  );
+  sharedMemoryClose(&info);
+  return {tmp_tensor};
+}
+
+PD_BUILD_STATIC_OP(share_external_data)
+    .Inputs({"input"})
+    .Outputs({"output"})
+    .Attrs({"shm_name: std::string", "shape: std::vector<int>"})
+    .SetKernelFn(PD_KERNEL(ShareExternalData));