Add synthetic delay points for latency testing

Add synthetic delay points for simulating long computation in the
following parts of the graphics/input pipeline:

1. blink.HandleInputEvent - Expensive JavaScript input event handling.
2. cc.RasterRequiredForActivation - Long running raster tasks.
3. cc.BeginMainFrame - Complex main thread picture recording, layout or
   rAF.
4. gpu.AsyncTexImage - Slow texture uploads.
5. gpu.SwapBuffers - GPU-bound rendering.

BUG=307841

Review URL: https://codereview.chromium.org/83183005

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@244175 0039d316-1c4b-4281-b951-d872f2087c98

4 files changed, 18 insertions, 0 deletions

diff --git a/gpu/command_buffer/service/async_pixel_transfer_manager_egl.cc b/gpu/command_buffer/service/async_pixel_transfer_manager_egl.cc
index 7e0d515..3f3acc5 100644
--- a/gpu/command_buffer/service/async_pixel_transfer_manager_egl.cc
+++ b/gpu/command_buffer/service/async_pixel_transfer_manager_egl.cc
@@ -9,6 +9,7 @@
 
 #include "base/bind.h"
 #include "base/debug/trace_event.h"
+#include "base/debug/trace_event_synthetic_delay.h"
 #include "base/lazy_instance.h"
 #include "base/logging.h"
 #include "base/memory/ref_counted.h"
@@ -234,10 +235,12 @@ class TransferStateInternal
   }
 
   void MarkAsTransferIsInProgress() {
+    TRACE_EVENT_SYNTHETIC_DELAY_BEGIN("gpu.AsyncTexImage");
     transfer_completion_.Reset();
   }
 
   void MarkAsCompleted() {
+    TRACE_EVENT_SYNTHETIC_DELAY_END("gpu.AsyncTexImage");
     transfer_completion_.Signal();
   }
 
diff --git a/gpu/command_buffer/service/async_pixel_transfer_manager_idle.cc b/gpu/command_buffer/service/async_pixel_transfer_manager_idle.cc
index 88aff57..dcd870d 100644
--- a/gpu/command_buffer/service/async_pixel_transfer_manager_idle.cc
+++ b/gpu/command_buffer/service/async_pixel_transfer_manager_idle.cc
@@ -6,6 +6,7 @@
 
 #include "base/bind.h"
 #include "base/debug/trace_event.h"
+#include "base/debug/trace_event_synthetic_delay.h"
 #include "base/lazy_instance.h"
 #include "base/memory/weak_ptr.h"
 #include "gpu/command_buffer/service/safe_shared_memory_pool.h"
@@ -98,6 +99,7 @@ void AsyncPixelTransferDelegateIdle::AsyncTexImage2D(
     const AsyncTexImage2DParams& tex_params,
     const AsyncMemoryParams& mem_params,
     const base::Closure& bind_callback) {
+  TRACE_EVENT_SYNTHETIC_DELAY_BEGIN("gpu.AsyncTexImage");
   DCHECK_EQ(static_cast<GLenum>(GL_TEXTURE_2D), tex_params.target);
   DCHECK(mem_params.shared_memory);
   DCHECK_LE(mem_params.shm_data_offset + mem_params.shm_data_size,
@@ -121,6 +123,7 @@ void AsyncPixelTransferDelegateIdle::AsyncTexImage2D(
 void AsyncPixelTransferDelegateIdle::AsyncTexSubImage2D(
     const AsyncTexSubImage2DParams& tex_params,
     const AsyncMemoryParams& mem_params) {
+  TRACE_EVENT_SYNTHETIC_DELAY_BEGIN("gpu.AsyncTexImage");
   DCHECK_EQ(static_cast<GLenum>(GL_TEXTURE_2D), tex_params.target);
   DCHECK(mem_params.shared_memory);
   DCHECK_LE(mem_params.shm_data_offset + mem_params.shm_data_size,
@@ -188,6 +191,7 @@ void AsyncPixelTransferDelegateIdle::PerformAsyncTexImage2D(
         data);
   }
 
+  TRACE_EVENT_SYNTHETIC_DELAY_END("gpu.AsyncTexImage");
   transfer_in_progress_ = false;
   shared_state_->texture_upload_count++;
   shared_state_->total_texture_upload_time +=
@@ -243,6 +247,7 @@ void AsyncPixelTransferDelegateIdle::PerformAsyncTexSubImage2D(
         data);
   }
 
+  TRACE_EVENT_SYNTHETIC_DELAY_END("gpu.AsyncTexImage");
   transfer_in_progress_ = false;
   shared_state_->texture_upload_count++;
   shared_state_->total_texture_upload_time +=
diff --git a/gpu/command_buffer/service/async_pixel_transfer_manager_share_group.cc b/gpu/command_buffer/service/async_pixel_transfer_manager_share_group.cc
index f71e07e..dcdab1c 100644
--- a/gpu/command_buffer/service/async_pixel_transfer_manager_share_group.cc
+++ b/gpu/command_buffer/service/async_pixel_transfer_manager_share_group.cc
@@ -8,6 +8,7 @@
 
 #include "base/bind.h"
 #include "base/debug/trace_event.h"
+#include "base/debug/trace_event_synthetic_delay.h"
 #include "base/lazy_instance.h"
 #include "base/logging.h"
 #include "base/memory/ref_counted.h"
@@ -251,6 +252,7 @@ class TransferStateInternal
       const AsyncMemoryParams mem_params,
       scoped_refptr<AsyncPixelTransferUploadStats> texture_upload_stats,
       const base::Closure& bind_callback) {
+    TRACE_EVENT_SYNTHETIC_DELAY_BEGIN("gpu.AsyncTexImage");
     pending_upload_task_ = new PendingTask(base::Bind(
         &TransferStateInternal::PerformAsyncTexImage2D,
         this,
@@ -276,6 +278,7 @@ class TransferStateInternal
       AsyncTexSubImage2DParams tex_params,
       AsyncMemoryParams mem_params,
       scoped_refptr<AsyncPixelTransferUploadStats> texture_upload_stats) {
+    TRACE_EVENT_SYNTHETIC_DELAY_BEGIN("gpu.AsyncTexImage");
     pending_upload_task_ = new PendingTask(base::Bind(
         &TransferStateInternal::PerformAsyncTexSubImage2D,
         this,
@@ -328,6 +331,7 @@ class TransferStateInternal
                    tex_params.format,
                    tex_params.type,
                    data);
+      TRACE_EVENT_SYNTHETIC_DELAY_END("gpu.AsyncTexImage");
     }
 
     if (texture_upload_stats.get()) {
@@ -367,6 +371,7 @@ class TransferStateInternal
                       tex_params.format,
                       tex_params.type,
                       data);
+      TRACE_EVENT_SYNTHETIC_DELAY_END("gpu.AsyncTexImage");
     }
 
     if (texture_upload_stats.get()) {
diff --git a/gpu/command_buffer/service/gles2_cmd_decoder.cc b/gpu/command_buffer/service/gles2_cmd_decoder.cc
index 25509d8..d76fec6 100644
--- a/gpu/command_buffer/service/gles2_cmd_decoder.cc
+++ b/gpu/command_buffer/service/gles2_cmd_decoder.cc
@@ -17,6 +17,7 @@
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/debug/trace_event.h"
+#include "base/debug/trace_event_synthetic_delay.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/string_split.h"
@@ -8944,6 +8945,10 @@ void GLES2DecoderImpl::DoSwapBuffers() {
   TRACE_EVENT2("gpu", "GLES2DecoderImpl::DoSwapBuffers",
                "offscreen", is_offscreen,
                "frame", this_frame_number);
+  {
+    TRACE_EVENT_SYNTHETIC_DELAY("gpu.SwapBuffers");
+  }
+
   bool is_tracing;
   TRACE_EVENT_CATEGORY_GROUP_ENABLED(TRACE_DISABLED_BY_DEFAULT("gpu.debug"),
                                      &is_tracing);