!7898 Set gpu device id for multiple threads

Merge pull request !7898 from ZPaC/master-multithread-set-device-id

mindspore/ccsrc/backend/session/gpu_session.cc

@@ -53,6 +53,8 @@
 #include "runtime/device/gpu/gpu_stream_assign.h"
 #include "runtime/device/gpu/kernel_info_setter.h"
 #include "runtime/device/kernel_runtime_manager.h"
+#include "runtime/device/gpu/cuda_driver.h"
+#include "runtime/device/gpu/distribution/collective_init.h"
 #include "utils/ms_utils.h"
 #include "utils/config_manager.h"
 #include "utils/ms_context.h"
@@ -64,6 +66,25 @@ namespace mindspore {
 namespace session {
 namespace gpu {
 using AnfAlgo = mindspore::session::AnfRuntimeAlgorithm;
+using CollectiveInitializer = device::gpu::CollectiveInitializer;
+using GetLocalRankId = device::gpu::GetLocalRankId;
+
+void GPUSession::Init(uint32_t device_id) {
+  const void *collective_handle_ = CollectiveInitializer::instance().collective_handle();
+  bool collective_inited = CollectiveInitializer::instance().collective_inited();
+  if (collective_inited && collective_handle_ != nullptr) {
+    auto get_local_rank_funcptr =
+      reinterpret_cast<GetLocalRankId>(dlsym(const_cast<void *>(collective_handle_), "local_rank_id"));
+    MS_EXCEPTION_IF_NULL(get_local_rank_funcptr);
+    device_id = IntToUint((*get_local_rank_funcptr)());
+  }
+  bool ret = device::gpu::CudaDriver::set_current_device(UintToInt(device_id));
+  if (!ret) {
+    MS_LOG(EXCEPTION) << "GPUSession failed to set current device id.";
+  }
+  MS_LOG(INFO) << "Set device id " << device_id << " for gpu session.";
+  InitDevice(kGPUDevice, device_id);
+}
 
 void GPUSession::SelectKernel(const std::shared_ptr<KernelGraph> &kernel_graph) const {
   MS_EXCEPTION_IF_NULL(kernel_graph);

mindspore/ccsrc/backend/session/gpu_session.h

@@ -31,7 +31,7 @@ class GPUSession : public SessionBasic {
  public:
   GPUSession() = default;
   ~GPUSession() override = default;
-  void Init(uint32_t device_id) override { InitDevice(kGPUDevice, device_id); }
+  void Init(uint32_t device_id) override;
 
  protected:
   GraphId CompileGraphImpl(const AnfNodePtrList &lst, const AnfNodePtrList &outputs) override;

mindspore/ccsrc/runtime/device/gpu/gpu_kernel_runtime.cc

@@ -187,14 +187,6 @@ bool GPUKernelRuntime::InitDevice() {
     MS_LOG(ERROR) << "No GPU device found.";
     return false;
   }
-  const void *collective_handle_ = CollectiveInitializer::instance().collective_handle();
-  bool collective_inited = CollectiveInitializer::instance().collective_inited();
-  if (collective_inited && collective_handle_ != nullptr) {
-    auto get_local_rank_funcptr =
-      reinterpret_cast<GetLocalRankId>(dlsym(const_cast<void *>(collective_handle_), "local_rank_id"));
-    MS_EXCEPTION_IF_NULL(get_local_rank_funcptr);
-    device_id_ = IntToUint((*get_local_rank_funcptr)());
-  }
   if (!GPUDeviceManager::GetInstance().is_device_id_init()) {
     if (!GPUDeviceManager::GetInstance().set_cur_device_id(device_id_)) {
       MS_LOG(ERROR) << "Failed to set current device to " << SizeToInt(device_id_);