From cb4b58052f325864ece956898cdd64373edf896a Mon Sep 17 00:00:00 2001
From: OpaqueReptile <1337paf92@gmail.com>
Date: Wed, 17 May 2023 13:38:59 -0500
Subject: [PATCH] Start GPU performance counter at 0 instead of host GPU value
(#4992)
* Start performance counter at 0 instead of host perf counter value
* whitespace
* init _firstTimestamp in constructer per feedback
* change comment
* punctuation
* address feedback
* revise comment
---
src/Ryujinx.Graphics.Gpu/GpuContext.cs | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/src/Ryujinx.Graphics.Gpu/GpuContext.cs b/src/Ryujinx.Graphics.Gpu/GpuContext.cs
index ccaabf70fb..0fe6a28ffe 100644
--- a/src/Ryujinx.Graphics.Gpu/GpuContext.cs
+++ b/src/Ryujinx.Graphics.Gpu/GpuContext.cs
@@ -99,6 +99,7 @@ namespace Ryujinx.Graphics.Gpu
private bool _pendingSync;
private long _modifiedSequence;
+ private ulong _firstTimestamp;
/// <summary>
/// Creates a new instance of the GPU emulation context.
@@ -123,6 +124,8 @@ namespace Ryujinx.Graphics.Gpu
DeferredActions = new Queue<Action>();
PhysicalMemoryRegistry = new ConcurrentDictionary<ulong, PhysicalMemory>();
+
+ _firstTimestamp = ConvertNanosecondsToTicks((ulong)PerformanceCounter.ElapsedNanoseconds);
}
/// <summary>
@@ -217,7 +220,8 @@ namespace Ryujinx.Graphics.Gpu
/// <returns>The current GPU timestamp</returns>
public ulong GetTimestamp()
{
- ulong ticks = ConvertNanosecondsToTicks((ulong)PerformanceCounter.ElapsedNanoseconds);
+ // Guest timestamp will start at 0, instead of host value.
+ ulong ticks = ConvertNanosecondsToTicks((ulong)PerformanceCounter.ElapsedNanoseconds) - _firstTimestamp;
if (GraphicsConfig.FastGpuTime)
{