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Start GPU performance counter at 0 instead of host GPU value (#4992)

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* 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
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OpaqueReptile 2023-05-17 13:38:59 -05:00 committed by GitHub
parent f8cdd5f484
commit cb4b58052f
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src/Ryujinx.Graphics.Gpu/GpuContext.cs
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@ -99,6 +99,7 @@ namespace Ryujinx.Graphics.Gpu
private bool _pendingSync; private bool _pendingSync;
private long _modifiedSequence; private long _modifiedSequence;
private ulong _firstTimestamp;
/// <summary> /// <summary>
/// Creates a new instance of the GPU emulation context. /// Creates a new instance of the GPU emulation context.
@ -123,6 +124,8 @@ namespace Ryujinx.Graphics.Gpu
DeferredActions = new Queue<Action>(); DeferredActions = new Queue<Action>();
PhysicalMemoryRegistry = new ConcurrentDictionary<ulong, PhysicalMemory>(); PhysicalMemoryRegistry = new ConcurrentDictionary<ulong, PhysicalMemory>();
_firstTimestamp = ConvertNanosecondsToTicks((ulong)PerformanceCounter.ElapsedNanoseconds);
} }
/// <summary> /// <summary>
@ -217,7 +220,8 @@ namespace Ryujinx.Graphics.Gpu
/// <returns>The current GPU timestamp</returns> /// <returns>The current GPU timestamp</returns>
public ulong GetTimestamp() 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) if (GraphicsConfig.FastGpuTime)
{ {