FPSCounter: Add "Log render time to file" feature.

Allows for a more accurate performance measurement.

Source/Core/DolphinWX/VideoConfigDiag.cpp

@@ -127,6 +127,7 @@ wxString disable_fog_desc = wxTRANSLATE("Makes distant objects more visible by r
 wxString disable_dstalpha_desc = wxTRANSLATE("Disables emulation of a hardware feature called destination alpha, which is used in many games for various graphical effects.\n\nIf unsure, leave this unchecked.");
 wxString show_fps_desc = wxTRANSLATE("Show the number of frames rendered per second as a measure of emulation speed.\n\nIf unsure, leave this unchecked.");
 wxString log_fps_to_file_desc = wxTRANSLATE("Log the number of frames rendered per second to User/Logs/fps.txt. Use this feature when you want to measure the performance of Dolphin.\n\nIf unsure, leave this unchecked.");
+wxString log_render_time_to_file_desc = wxTRANSLATE("Log the render time of every frame to User/Logs/render_time.txt. Use this feature when you want to measure the performance of Dolphin.\n\nIf unsure, leave this unchecked.");
 wxString show_input_display_desc = wxTRANSLATE("Display the inputs read by the emulator.\n\nIf unsure, leave this unchecked.");
 wxString show_stats_desc = wxTRANSLATE("Show various statistics.\n\nIf unsure, leave this unchecked.");
 wxString texfmt_desc = wxTRANSLATE("Modify textures to show the format they're encoded in. Needs an emulation reset in most cases.\n\nIf unsure, leave this unchecked.");
@@ -586,6 +587,8 @@ VideoConfigDiag::VideoConfigDiag(wxWindow* parent, const std::string &title, con
 	szr_misc->Add(cb_prog_scan);
 	}
 
+	szr_misc->Add(CreateCheckBox(page_advanced, _("Log render time to file"), wxGetTranslation(log_render_time_to_file_desc), vconfig.bLogRenderTimeToFile));
+
 	wxStaticBoxSizer* const group_misc = new wxStaticBoxSizer(wxVERTICAL, page_advanced, _("Misc"));
 	szr_advanced->Add(group_misc, 0, wxEXPAND | wxALL, 5);
 	group_misc->Add(szr_misc, 1, wxEXPAND | wxLEFT | wxRIGHT | wxBOTTOM, 5);

Source/Core/VideoCommon/FPSCounter.cpp

@@ -20,17 +20,24 @@ static unsigned int s_fps_last_counter = 0;
 static unsigned long s_last_update_time = 0;
 static std::ofstream s_bench_file;
 
+static Common::Timer s_render_time;
+static std::ofstream s_time_file;
+
 void Initialize()
 {
 	s_counter = s_fps_last_counter = 0;
 	s_fps = 0;
 	s_last_update_time = Common::Timer::GetTimeMs();
 
+	s_render_time.Update();
+
 	if (s_bench_file.is_open())
 		s_bench_file.close();
+	if (s_time_file.is_open())
+		s_time_file.close();
 }
 
-static void LogFPSToFile(unsigned long val)
+static void LogFPSToFile(u64 val)
 {
 	if (!s_bench_file.is_open())
 		s_bench_file.open(File::GetUserPath(D_LOGS_IDX) + "fps.txt");
@@ -38,6 +45,14 @@ static void LogFPSToFile(unsigned long val)
 	s_bench_file << StringFromFormat("%lu\n", val);
 }
 
+static void LogRenderTimeToFile(u64 val)
+{
+	if (!s_time_file.is_open())
+		s_time_file.open(File::GetUserPath(D_LOGS_IDX) + "render_time.txt");
+
+	s_time_file << StringFromFormat("%lu\n", val);
+}
+
 int Update()
 {
 	if (Common::Timer::GetTimeMs() - s_last_update_time >= FPS_REFRESH_INTERVAL)
@@ -49,6 +64,12 @@ int Update()
 			LogFPSToFile(s_fps);
 	}
 
+	if (g_ActiveConfig.bLogRenderTimeToFile)
+	{
+		LogRenderTimeToFile(s_render_time.GetTimeDifference());
+		s_render_time.Update();
+	}
+
 	s_counter++;
 	return s_fps;
 }

Source/Core/VideoCommon/VideoConfig.cpp

@@ -58,6 +58,7 @@ void VideoConfig::Load(const std::string& ini_file)
 	settings->Get("SafeTextureCacheColorSamples", &iSafeTextureCache_ColorSamples,128);
 	settings->Get("ShowFPS", &bShowFPS, false);
 	settings->Get("LogFPSToFile", &bLogFPSToFile, false);
+	settings->Get("LogRenderTimeToFile", &bLogRenderTimeToFile, false);
 	settings->Get("ShowInputDisplay", &bShowInputDisplay, false);
 	settings->Get("OverlayStats", &bOverlayStats, false);
 	settings->Get("OverlayProjStats", &bOverlayProjStats, false);
@@ -230,6 +231,7 @@ void VideoConfig::Save(const std::string& ini_file)
 	settings->Set("SafeTextureCacheColorSamples", iSafeTextureCache_ColorSamples);
 	settings->Set("ShowFPS", bShowFPS);
 	settings->Set("LogFPSToFile", bLogFPSToFile);
+	settings->Set("LogRenderTimeToFile", bLogRenderTimeToFile);
 	settings->Set("ShowInputDisplay", bShowInputDisplay);
 	settings->Set("OverlayStats", bOverlayStats);
 	settings->Set("OverlayProjStats", bOverlayProjStats);

Source/Core/VideoCommon/VideoConfig.h

@@ -84,6 +84,7 @@ struct VideoConfig final
 	bool bTexFmtOverlayCenter;
 	bool bShowEFBCopyRegions;
 	bool bLogFPSToFile;
+	bool bLogRenderTimeToFile;
 
 	// Render
 	bool bWireFrame;