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Timing: Optimize Timestamp Aquisition (#479)

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* Timing: Optimize Timestamp Aquisition

Currently, we make use of Environment.TickCount in a number of places. This has some downsides, mainly being that the TickCount is a signed 32-bit integer, and has an effective limit of ~25 days before overflowing and wrapping around. Due to the signed-ness of the value, this also caused issues with negative numbers. This resolves these issues by using a 64-bit tick count obtained from Performance Counters (via the Stopwatch class). This has a beneficial side effect of being significantly more accurate than the TickCount.

* Timing: Rename ElapsedTicks to ElapsedMilliseconds and expose TicksPerX

* Timing: Some style changes

* Timing: Align static variable initialization
This commit is contained in:
jduncanator 2018-10-29 09:31:13 +11:00 • committed by gdkchan
parent b956bbc32c
commit c1b7340023
6 changed files with 102 additions and 49 deletions
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21
Ryujinx.Graphics/Gal/OpenGL/OGLCachedResource.cs
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@ -1,3 +1,4 @@
using Ryujinx.Common;
using System;
using System.Collections.Generic;
@ -18,7 +19,7 @@ namespace Ryujinx.Graphics.Gal.OpenGL
public long DataSize { get; private set; }
public int Timestamp { get; private set; }
public long Timestamp { get; private set; }
public CacheBucket(T Value, long DataSize, LinkedListNode<long> Node)
{
@ -26,7 +27,7 @@ namespace Ryujinx.Graphics.Gal.OpenGL
this.DataSize = DataSize;
this.Node = Node;
Timestamp = Environment.TickCount;
Timestamp = PerformanceCounter.ElapsedMilliseconds;
}
}
@ -141,7 +142,7 @@ namespace Ryujinx.Graphics.Gal.OpenGL
private void ClearCacheIfNeeded()
{
int Timestamp = Environment.TickCount;
long Timestamp = PerformanceCounter.ElapsedMilliseconds;
int Count = 0;
@ -156,7 +157,7 @@ namespace Ryujinx.Graphics.Gal.OpenGL
CacheBucket Bucket = Cache[Node.Value];
int TimeDelta = RingDelta(Bucket.Timestamp, Timestamp);
long TimeDelta = Bucket.Timestamp - Timestamp;
if ((uint)TimeDelta <= (uint)MaxTimeDelta)
{
@ -170,17 +171,5 @@ namespace Ryujinx.Graphics.Gal.OpenGL
DeleteValueCallback(Bucket.Value);
}
}
private int RingDelta(int Old, int New)
{
if ((uint)New < (uint)Old)
{
return New + (~Old + 1);
}
else
{
return New - Old;
}
}
}
}