Add page flip completion event to trace on CrOS

ui/ozone/platform/drm/gpu/drm_device.cc

 // Copyright 2014 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/ozone/platform/drm/gpu/drm_device.h"
 
 #include <fcntl.h>
 #include <sys/mman.h>
 #include <unistd.h>
 #include <xf86drm.h>
 #include <xf86drmMode.h>
 #include <utility>
 
 #include "base/logging.h"
 #include "base/macros.h"
 #include "base/memory/free_deleter.h"
 #include "base/message_loop/message_loop.h"
 #include "base/posix/safe_strerror.h"
 #include "base/task_runner.h"
 #include "base/threading/thread_task_runner_handle.h"
 #include "base/trace_event/trace_event.h"
+#include "base/trace_event/trace_event_argument.h"
 #include "third_party/skia/include/core/SkImageInfo.h"
 #include "ui/display/types/gamma_ramp_rgb_entry.h"
 #include "ui/ozone/platform/drm/common/drm_util.h"
 #include "ui/ozone/platform/drm/gpu/hardware_display_plane_manager_legacy.h"
 
 #if defined(USE_DRM_ATOMIC)
 #include "ui/ozone/platform/drm/gpu/hardware_display_plane_manager_atomic.h"
 #endif
 
 namespace ui {
@@ skipping 52 matching lines @@
   int idx = 0;
   while (idx < len) {
     DCHECK_LE(static_cast<int>(sizeof(drm_event)), len - idx);
     drm_event event;
     memcpy(&event, &buffer[idx], sizeof(event));
     switch (event.type) {
       case DRM_EVENT_FLIP_COMPLETE: {
         DCHECK_LE(static_cast<int>(sizeof(drm_event_vblank)), len - idx);
         drm_event_vblank vblank;
         memcpy(&vblank, &buffer[idx], sizeof(vblank));
+        std::unique_ptr<base::trace_event::TracedValue> drm_data(
+            new base::trace_event::TracedValue());
+        drm_data->SetInteger("frame_count", 1);
+        drm_data->SetInteger("vblank.tv_sec", vblank.tv_sec);
+        drm_data->SetInteger("vblank.tv_usec", vblank.tv_usec);
+        TRACE_EVENT_INSTANT1("benchmark,drm", "DrmEventFlipComplete",
+                             TRACE_EVENT_SCOPE_THREAD, "data",
+                             std::move(drm_data));
         callback.Run(vblank.sequence, vblank.tv_sec, vblank.tv_usec,
                      vblank.user_data);
       } break;
       case DRM_EVENT_VBLANK:
         break;
       default:
         NOTREACHED();
         break;
     }
 
@@ skipping 708 matching lines @@
               reinterpret_cast<unsigned char*>(ctm_blob_data.get()),
               sizeof(DrmColorCtm)))
         return false;
     }
   }
 
   return true;
 }
 
 }  // namespace ui