[Dashboard] Display actor task execution info (#6705)

Co-authored-by: Philipp Moritz <pcmoritz@gmail.com>

src/ray/core_worker/core_worker.cc

@@ -1189,6 +1189,7 @@ void CoreWorker::HandleGetCoreWorkerStats(const rpc::GetCoreWorkerStatsRequest &
     (*used_resources_map)[it.first] = quantity;
   }
   stats->set_webui_display(webui_display_);
+  stats->set_actor_title(actor_title_);
   MemoryStoreStats memory_store_stats = memory_store_->GetMemoryStoreStatisticalData();
   stats->set_num_local_objects(memory_store_stats.num_local_objects);
   stats->set_used_object_store_memory(memory_store_stats.used_object_store_memory);
@@ -1225,4 +1226,9 @@ void CoreWorker::SetWebuiDisplay(const std::string &message) {
   webui_display_ = message;
 }
 
+void CoreWorker::SetActorTitle(const std::string &title) {
+  absl::MutexLock lock(&mutex_);
+  actor_title_ = title;
+}
+
 }  // namespace ray

src/ray/core_worker/core_worker.h

@@ -99,6 +99,8 @@ class CoreWorker : public rpc::CoreWorkerServiceHandler {
 
   void SetWebuiDisplay(const std::string &message);
 
+  void SetActorTitle(const std::string &title);
+
   /// Increase the reference count for this object ID.
   /// Increase the local reference count for this object ID. Should be called
   /// by the language frontend when a new reference is created.
@@ -657,6 +659,9 @@ class CoreWorker : public rpc::CoreWorkerServiceHandler {
   /// String to be displayed on Web UI.
   std::string webui_display_ GUARDED_BY(mutex_);
 
+  /// Actor title that consists of class name, args, kwargs for actor construction.
+  std::string actor_title_ GUARDED_BY(mutex_);
+
   /// Number of tasks that have been pushed to the actor but not executed.
   std::atomic<int64_t> task_queue_length_;
 

src/ray/protobuf/common.proto

@@ -214,4 +214,6 @@ message CoreWorkerStats {
   int32 task_queue_length = 13;
   // Number of executed tasks.
   int32 num_executed_tasks = 14;
+  // Actor constructor.
+  string actor_title = 15;
 }

src/ray/protobuf/reporter.proto

@@ -0,0 +1,27 @@
+syntax = "proto3";
+
+package ray.rpc;
+
+import "src/ray/protobuf/common.proto";
+
+message GetProfilingStatsRequest {
+  // PID of the worker process.
+  uint32 pid = 1;
+  // Duration of the profiling in seconds.
+  int32 duration = 2;
+}
+
+message GetProfilingStatsReply {
+  // Profiling stats.
+  string profiling_stats = 1;
+  // Standard output of the profiler process.
+  string stdout = 2;
+  // Standard error of the profiler process.
+  string stderr = 3;
+}
+
+// Service for communicating with the reporter.py process on a remote node.
+service ReporterService {
+  // Get the profiling stats.
+  rpc GetProfilingStats(GetProfilingStatsRequest) returns (GetProfilingStatsReply);
+}