WIP: Plumbing input event latency reporting through Mus GPU.

ui/events/latency_info.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ui/events/latency_info.h"
 
 #include <stddef.h>
 
 #include <algorithm>
 #include <string>
 #include <utility>
 
 #include "base/json/json_writer.h"
 #include "base/lazy_instance.h"
 #include "base/macros.h"
 #include "base/strings/stringprintf.h"
 #include "base/trace_event/trace_event.h"
 
 namespace {
 
 const size_t kMaxLatencyInfoNumber = 100;
 
-const char* GetComponentName(ui::LatencyComponentType type) {
-#define CASE_TYPE(t) case ui::t:  return #t
-  switch (type) {
-    CASE_TYPE(INPUT_EVENT_LATENCY_BEGIN_RWH_COMPONENT);
-    CASE_TYPE(LATENCY_BEGIN_SCROLL_LISTENER_UPDATE_MAIN_COMPONENT);
-    CASE_TYPE(INPUT_EVENT_LATENCY_SCROLL_UPDATE_ORIGINAL_COMPONENT);
-    CASE_TYPE(INPUT_EVENT_LATENCY_FIRST_SCROLL_UPDATE_ORIGINAL_COMPONENT);
-    CASE_TYPE(INPUT_EVENT_LATENCY_ORIGINAL_COMPONENT);
-    CASE_TYPE(INPUT_EVENT_LATENCY_UI_COMPONENT);
-    CASE_TYPE(INPUT_EVENT_LATENCY_RENDERING_SCHEDULED_MAIN_COMPONENT);
-    CASE_TYPE(INPUT_EVENT_LATENCY_RENDERING_SCHEDULED_IMPL_COMPONENT);
-    CASE_TYPE(INPUT_EVENT_LATENCY_FORWARD_SCROLL_UPDATE_TO_MAIN_COMPONENT);
-    CASE_TYPE(INPUT_EVENT_LATENCY_ACK_RWH_COMPONENT);
-    CASE_TYPE(WINDOW_SNAPSHOT_FRAME_NUMBER_COMPONENT);
-    CASE_TYPE(TAB_SHOW_COMPONENT);
-    CASE_TYPE(INPUT_EVENT_LATENCY_RENDERER_MAIN_COMPONENT);
-    CASE_TYPE(INPUT_EVENT_LATENCY_RENDERER_SWAP_COMPONENT);
-    CASE_TYPE(INPUT_EVENT_BROWSER_RECEIVED_RENDERER_SWAP_COMPONENT);
-    CASE_TYPE(INPUT_EVENT_GPU_SWAP_BUFFER_COMPONENT);
-    CASE_TYPE(INPUT_EVENT_LATENCY_GENERATE_SCROLL_UPDATE_FROM_MOUSE_WHEEL);
-    CASE_TYPE(INPUT_EVENT_LATENCY_TERMINATED_NO_SWAP_COMPONENT);
-    CASE_TYPE(INPUT_EVENT_LATENCY_TERMINATED_FRAME_SWAP_COMPONENT);
-    CASE_TYPE(INPUT_EVENT_LATENCY_TERMINATED_COMMIT_FAILED_COMPONENT);
-    CASE_TYPE(INPUT_EVENT_LATENCY_TERMINATED_COMMIT_NO_UPDATE_COMPONENT);
-    CASE_TYPE(INPUT_EVENT_LATENCY_TERMINATED_SWAP_FAILED_COMPONENT);
-    default:
-      DLOG(WARNING) << "Unhandled LatencyComponentType.\n";
-      break;
-  }
-#undef CASE_TYPE
-  return "unknown";
-}
 
 bool IsTerminalComponent(ui::LatencyComponentType type) {
   switch (type) {
     case ui::INPUT_EVENT_LATENCY_TERMINATED_NO_SWAP_COMPONENT:
     case ui::INPUT_EVENT_LATENCY_TERMINATED_FRAME_SWAP_COMPONENT:
     case ui::INPUT_EVENT_LATENCY_TERMINATED_COMMIT_FAILED_COMPONENT:
     case ui::INPUT_EVENT_LATENCY_TERMINATED_COMMIT_NO_UPDATE_COMPONENT:
     case ui::INPUT_EVENT_LATENCY_TERMINATED_SWAP_FAILED_COMPONENT:
       return true;
     default:
@@ skipping 58 matching lines @@
   const unsigned char* latency_info_enabled;
 };
 
 static base::LazyInstance<LatencyInfoEnabledInitializer>::Leaky
   g_latency_info_enabled = LAZY_INSTANCE_INITIALIZER;
 
 }  // namespace
 
 namespace ui {
 
+const char* GetComponentName(ui::LatencyComponentType type) {
+#define CASE_TYPE(t) case ui::t:  return #t
+  switch (type) {
+    CASE_TYPE(INPUT_EVENT_LATENCY_BEGIN_RWH_COMPONENT);
+    CASE_TYPE(LATENCY_BEGIN_SCROLL_LISTENER_UPDATE_MAIN_COMPONENT);
+    CASE_TYPE(INPUT_EVENT_LATENCY_SCROLL_UPDATE_ORIGINAL_COMPONENT);
+    CASE_TYPE(INPUT_EVENT_LATENCY_FIRST_SCROLL_UPDATE_ORIGINAL_COMPONENT);
+    CASE_TYPE(INPUT_EVENT_LATENCY_ORIGINAL_COMPONENT);
+    CASE_TYPE(INPUT_EVENT_LATENCY_UI_COMPONENT);
+    CASE_TYPE(INPUT_EVENT_LATENCY_RENDERING_SCHEDULED_MAIN_COMPONENT);
+    CASE_TYPE(INPUT_EVENT_LATENCY_RENDERING_SCHEDULED_IMPL_COMPONENT);
+    CASE_TYPE(INPUT_EVENT_LATENCY_FORWARD_SCROLL_UPDATE_TO_MAIN_COMPONENT);
+    CASE_TYPE(INPUT_EVENT_LATENCY_ACK_RWH_COMPONENT);
+    CASE_TYPE(WINDOW_SNAPSHOT_FRAME_NUMBER_COMPONENT);
+    CASE_TYPE(TAB_SHOW_COMPONENT);
+    CASE_TYPE(INPUT_EVENT_LATENCY_RENDERER_MAIN_COMPONENT);
+    CASE_TYPE(INPUT_EVENT_LATENCY_RENDERER_SWAP_COMPONENT);
+    CASE_TYPE(INPUT_EVENT_BROWSER_RECEIVED_RENDERER_SWAP_COMPONENT);
+    CASE_TYPE(INPUT_EVENT_GPU_SWAP_BUFFER_COMPONENT);
+    CASE_TYPE(INPUT_EVENT_LATENCY_GENERATE_SCROLL_UPDATE_FROM_MOUSE_WHEEL);
+    CASE_TYPE(INPUT_EVENT_LATENCY_TERMINATED_NO_SWAP_COMPONENT);
+    CASE_TYPE(INPUT_EVENT_LATENCY_TERMINATED_FRAME_SWAP_COMPONENT);
+    CASE_TYPE(INPUT_EVENT_LATENCY_TERMINATED_COMMIT_FAILED_COMPONENT);
+    CASE_TYPE(INPUT_EVENT_LATENCY_TERMINATED_COMMIT_NO_UPDATE_COMPONENT);
+    CASE_TYPE(INPUT_EVENT_LATENCY_TERMINATED_SWAP_FAILED_COMPONENT);
+    default:
+      DLOG(WARNING) << "Unhandled LatencyComponentType.\n";
+      break;
+  }
+#undef CASE_TYPE
+  return "unknown";
+}
+
 LatencyInfo::LatencyInfo() : LatencyInfo(SourceEventType::UNKNOWN) {}
 
 LatencyInfo::LatencyInfo(SourceEventType type)
     : input_coordinates_size_(0),
       trace_id_(-1),
       coalesced_(false),
       terminated_(false),
       source_event_type_(type) {}
 
 LatencyInfo::LatencyInfo(const LatencyInfo& other) = default;
@@ skipping 205 matching lines @@
                               LatencyComponent* output) const {
   LatencyMap::const_iterator it = latency_components_.find(
       std::make_pair(type, id));
   if (it == latency_components_.end())
     return false;
   if (output)
     *output = it->second;
   return true;
 }
 
+bool LatencyInfo::FindLatency(LatencyComponentType type,
+                              LatencyComponent* output) const {
+  LatencyMap::const_iterator it = latency_components_.begin();
+  while (it != latency_components_.end()) {
+    if (it->first.first == type) {
+      if (output)
+        *output = it->second;
+      return true;
+    }
+    it++;
+  }
+  return false;
+}
+
 void LatencyInfo::RemoveLatency(LatencyComponentType type) {
   LatencyMap::iterator it = latency_components_.begin();
   while (it != latency_components_.end()) {
     if (it->first.first == type)
       it = latency_components_.erase(it);
     else
       it++;
   }
 }
 
 bool LatencyInfo::AddInputCoordinate(const gfx::PointF& input_coordinate) {
   if (input_coordinates_size_ >= kMaxInputCoordinates)
     return false;
   input_coordinates_[input_coordinates_size_++] = input_coordinate;
   return true;
 }
 
 }  // namespace ui