fix multiple epoch data issue

mindspore/ccsrc/profiler/device/gpu/gpu_profiling.cc

@@ -60,8 +60,8 @@ namespace gpu {
 std::shared_ptr<GPUProfiler> GPUProfiler::profiler_inst_ = nullptr;
 
 int32_t GetThreadID() {
-  int32_t thread_id = 0;
-  thread_id = static_cast<int32_t>(pthread_self());
+  uint32_t thread_id = 0;
+  thread_id = static_cast<uint32_t>(pthread_self());
   return thread_id;
 }
 
@@ -475,6 +475,7 @@ void GPUProfiler::Stop() {
   StopCUPTI();
   OpsParser();
   SaveProfileData();
+  ClearInst();
 }
 
 void GPUProfiler::SaveProfileData() {
@@ -486,9 +487,19 @@ void GPUProfiler::SaveProfileData() {
     dataSaver.ParseEvent(events_);
     dataSaver.WriteFile(profile_data_path_);
   }
+}
+
+void GPUProfiler::ClearInst() {
   op_info_map_.clear();
   op_name_map_.clear();
   events_.clear();
+  activities_enable_.clear();
+  enable_flag_ = false;
+  sync_enable_flag_ = true;
+  cupti_callback_events_count_ = 0l;
+  cupti_callback_events_drop_count_ = 0l;
+  cupti_activity_events_count_ = 0l;
+  cupti_activity_events_drop_count_ = 0l;
 }
 
 void CUPTIAPI ActivityAllocBuffer(uint8_t **buffer, size_t *size, size_t *maxNumRecords) {

mindspore/ccsrc/profiler/device/gpu/gpu_profiling.h

@@ -75,7 +75,7 @@ struct Event {
   uint32_t device_id;
   uint32_t correlation_id;
   uint32_t thread_id;
-  int64_t context_id;
+  uint32_t context_id;
   uint32_t stream_id;
   CUpti_CallbackId cb_id;
   union {
@@ -131,7 +131,7 @@ class GPUProfiler {
   GPUProfiler() = default;
   void OpsParser();
   void EventLog(const Event &event);
-
+  void ClearInst();
   void HandleActivityRecord(CUpti_Activity *record);
   void AddEvent(Event &&event);
   void SetRunTimeData(const std::string &op_name, void *stream);