From 453e90ef6f2d3b85d5363a3dbd927e189b7dcd62 Mon Sep 17 00:00:00 2001
From: ameerj <52414509+ameerj@users.noreply.github.com>
Date: Sat, 15 May 2021 20:34:20 -0400
Subject: perf_stats: Rework FPS counter to be more accurate

The FPS counter was based on metrics in the nvdisp swapbuffers call. This metric would be accurate if the gpu thread/renderer were synchronous with the nvdisp service, but that's no longer the case.

This commit moves the frame counting responsibility onto the concrete renderers after their frame draw calls. Resulting in more meaningful metrics.
The displayed FPS is now made up of the average framerate between the previous and most recent update, in order to avoid distracting FPS counter updates when framerate is oscillating between close values.

The status bar update frequency was also changed from 2 seconds to 500ms.
---
 src/core/core.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

(limited to 'src/core/core.cpp')

diff --git a/src/core/core.cpp b/src/core/core.cpp
index 434bf32626..47e70c1574 100644
--- a/src/core/core.cpp
+++ b/src/core/core.cpp
@@ -289,7 +289,8 @@ struct System::Impl {
 
             telemetry_session->AddField(performance, "Shutdown_EmulationSpeed",
                                         perf_results.emulation_speed * 100.0);
-            telemetry_session->AddField(performance, "Shutdown_Framerate", perf_results.game_fps);
+            telemetry_session->AddField(performance, "Shutdown_Framerate",
+                                        perf_results.average_game_fps);
             telemetry_session->AddField(performance, "Shutdown_Frametime",
                                         perf_results.frametime * 1000.0);
             telemetry_session->AddField(performance, "Mean_Frametime_MS",
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