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Vulkan: Simplify MultiFenceHolder and managing them (#4845)

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* Vulkan: Simplify waitable add/remove

Removal of unnecessary hashset and dictionary

* Thread safety for GetBufferData in PersistentFlushBuffer

* Fix WaitForFencesImpl thread safety

* Proper methods for risky reference increments

* Wrong type of CB.

* Address feedback
This commit is contained in:
riperiperi 2023-05-08 11:45:12 +01:00 committed by GitHub
parent 895d9b53bc
commit 1b28ecd63e
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GPG Key ID: 4AEE18F83AFDEB23
6 changed files with 138 additions and 48 deletions
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17
src/Ryujinx.Graphics.Vulkan/Auto.cs
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@ -105,6 +105,23 @@ namespace Ryujinx.Graphics.Vulkan
}
}
public bool TryIncrementReferenceCount()
{
int lastValue;
do
{
lastValue = _referenceCount;
if (lastValue == 0)
{
return false;
}
}
while (Interlocked.CompareExchange(ref _referenceCount, lastValue + 1, lastValue) != lastValue);
return true;
}
public void IncrementReferenceCount()
{
if (Interlocked.Increment(ref _referenceCount) == 1)

5
src/Ryujinx.Graphics.Vulkan/BufferHolder.cs
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@ -599,9 +599,10 @@ namespace Ryujinx.Graphics.Vulkan
Auto<DisposableBuffer> dst,
int srcOffset,
int dstOffset,
int size)
int size,
bool registerSrcUsage = true)
{
var srcBuffer = src.Get(cbs, srcOffset, size).Value;
var srcBuffer = registerSrcUsage ? src.Get(cbs, srcOffset, size).Value : src.GetUnsafe().Value;
var dstBuffer = dst.Get(cbs, dstOffset, size).Value;
InsertBufferBarrier(

12
src/Ryujinx.Graphics.Vulkan/CommandBufferPool.cs
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@ -31,7 +31,7 @@ namespace Ryujinx.Graphics.Vulkan
public SemaphoreHolder Semaphore;
public List<IAuto> Dependants;
public HashSet<MultiFenceHolder> Waitables;
public List<MultiFenceHolder> Waitables;
public HashSet<SemaphoreHolder> Dependencies;
public void Initialize(Vk api, Device device, CommandPool pool)
@ -47,7 +47,7 @@ namespace Ryujinx.Graphics.Vulkan
api.AllocateCommandBuffers(device, allocateInfo, out CommandBuffer);
Dependants = new List<IAuto>();
Waitables = new HashSet<MultiFenceHolder>();
Waitables = new List<MultiFenceHolder>();
Dependencies = new HashSet<SemaphoreHolder>();
}
}
@ -143,9 +143,11 @@ namespace Ryujinx.Graphics.Vulkan
public void AddWaitable(int cbIndex, MultiFenceHolder waitable)
{
ref var entry = ref _commandBuffers[cbIndex];
waitable.AddFence(cbIndex, entry.Fence);
if (waitable.AddFence(cbIndex, entry.Fence))
{
entry.Waitables.Add(waitable);
}
}
public bool HasWaitableOnRentedCommandBuffer(MultiFenceHolder waitable, int offset, int size)
{
@ -156,7 +158,7 @@ namespace Ryujinx.Graphics.Vulkan
ref var entry = ref _commandBuffers[i];
if (entry.InUse &&
entry.Waitables.Contains(waitable) &&
waitable.HasFence(i) &&
waitable.IsBufferRangeInUse(i, offset, size))
{
return true;
@ -331,7 +333,7 @@ namespace Ryujinx.Graphics.Vulkan
foreach (var waitable in entry.Waitables)
{
waitable.RemoveFence(cbIndex, entry.Fence);
waitable.RemoveFence(cbIndex);
waitable.RemoveBufferUses(cbIndex);
}

19
src/Ryujinx.Graphics.Vulkan/FenceHolder.cs
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@ -32,6 +32,25 @@ namespace Ryujinx.Graphics.Vulkan
return _fence;
}
public bool TryGet(out Fence fence)
{
int lastValue;
do
{
lastValue = _referenceCount;
if (lastValue == 0)
{
fence = default;
return false;
}
}
while (Interlocked.CompareExchange(ref _referenceCount, lastValue + 1, lastValue) != lastValue);
fence = _fence;
return true;
}
public Fence Get()
{
Interlocked.Increment(ref _referenceCount);

109
src/Ryujinx.Graphics.Vulkan/MultiFenceHolder.cs
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@ -1,6 +1,5 @@
using Silk.NET.Vulkan;
using System.Collections.Generic;
using System.Linq;
using System;
namespace Ryujinx.Graphics.Vulkan
{
@ -11,7 +10,7 @@ namespace Ryujinx.Graphics.Vulkan
{
private static int BufferUsageTrackingGranularity = 4096;
private readonly Dictionary<FenceHolder, int> _fences;
private readonly FenceHolder[] _fences;
private BufferUsageBitmap _bufferUsageBitmap;
/// <summary>
@ -19,7 +18,7 @@ namespace Ryujinx.Graphics.Vulkan
/// </summary>
public MultiFenceHolder()
{
_fences = new Dictionary<FenceHolder, int>();
_fences = new FenceHolder[CommandBufferPool.MaxCommandBuffers];
}
/// <summary>
@ -28,7 +27,7 @@ namespace Ryujinx.Graphics.Vulkan
/// <param name="size">Size of the buffer</param>
public MultiFenceHolder(int size)
{
_fences = new Dictionary<FenceHolder, int>();
_fences = new FenceHolder[CommandBufferPool.MaxCommandBuffers];
_bufferUsageBitmap = new BufferUsageBitmap(size, BufferUsageTrackingGranularity);
}
@ -80,25 +79,37 @@ namespace Ryujinx.Graphics.Vulkan
/// </summary>
/// <param name="cbIndex">Command buffer index of the command buffer that owns the fence</param>
/// <param name="fence">Fence to be added</param>
public void AddFence(int cbIndex, FenceHolder fence)
/// <returns>True if the command buffer's previous fence value was null</returns>
public bool AddFence(int cbIndex, FenceHolder fence)
{
lock (_fences)
ref FenceHolder fenceRef = ref _fences[cbIndex];
if (fenceRef == null)
{
_fences.TryAdd(fence, cbIndex);
fenceRef = fence;
return true;
}
return false;
}
/// <summary>
/// Removes a fence from the holder.
/// </summary>
/// <param name="cbIndex">Command buffer index of the command buffer that owns the fence</param>
/// <param name="fence">Fence to be removed</param>
public void RemoveFence(int cbIndex, FenceHolder fence)
public void RemoveFence(int cbIndex)
{
lock (_fences)
{
_fences.Remove(fence);
_fences[cbIndex] = null;
}
/// <summary>
/// Determines if a fence referenced on the given command buffer.
/// </summary>
/// <param name="cbIndex">Index of the command buffer to check if it's used</param>
/// <returns>True if referenced, false otherwise</returns>
public bool HasFence(int cbIndex)
{
return _fences[cbIndex] != null;
}
/// <summary>
@ -147,21 +158,29 @@ namespace Ryujinx.Graphics.Vulkan
/// <returns>True if all fences were signaled before the timeout expired, false otherwise</returns>
private bool WaitForFencesImpl(Vk api, Device device, int offset, int size, bool hasTimeout, ulong timeout)
{
FenceHolder[] fenceHolders;
Fence[] fences;
Span<FenceHolder> fenceHolders = new FenceHolder[CommandBufferPool.MaxCommandBuffers];
lock (_fences)
{
fenceHolders = size != 0 ? GetOverlappingFences(offset, size) : _fences.Keys.ToArray();
fences = new Fence[fenceHolders.Length];
int count = size != 0 ? GetOverlappingFences(fenceHolders, offset, size) : GetFences(fenceHolders);
Span<Fence> fences = stackalloc Fence[count];
for (int i = 0; i < fenceHolders.Length; i++)
int fenceCount = 0;
for (int i = 0; i < count; i++)
{
fences[i] = fenceHolders[i].Get();
if (fenceHolders[i].TryGet(out Fence fence))
{
fences[fenceCount] = fence;
if (fenceCount < i)
{
fenceHolders[fenceCount] = fenceHolders[i];
}
fenceCount++;
}
}
if (fences.Length == 0)
if (fenceCount == 0)
{
return true;
}
@ -170,14 +189,14 @@ namespace Ryujinx.Graphics.Vulkan
if (hasTimeout)
{
signaled = FenceHelper.AllSignaled(api, device, fences, timeout);
signaled = FenceHelper.AllSignaled(api, device, fences.Slice(0, fenceCount), timeout);
}
else
{
FenceHelper.WaitAllIndefinitely(api, device, fences);
FenceHelper.WaitAllIndefinitely(api, device, fences.Slice(0, fenceCount));
}
for (int i = 0; i < fenceHolders.Length; i++)
for (int i = 0; i < fenceCount; i++)
{
fenceHolders[i].Put();
}
@ -185,28 +204,50 @@ namespace Ryujinx.Graphics.Vulkan
return signaled;
}
/// <summary>
/// Gets fences to wait for.
/// </summary>
/// <param name="storage">Span to store fences in</param>
/// <returns>Number of fences placed in storage</returns>
private int GetFences(Span<FenceHolder> storage)
{
int count = 0;
for (int i = 0; i < _fences.Length; i++)
{
var fence = _fences[i];
if (fence != null)
{
storage[count++] = fence;
}
}
return count;
}
/// <summary>
/// Gets fences to wait for use of a given buffer region.
/// </summary>
/// <param name="storage">Span to store overlapping fences in</param>
/// <param name="offset">Offset of the range</param>
/// <param name="size">Size of the range in bytes</param>
/// <returns>Fences for the specified region</returns>
private FenceHolder[] GetOverlappingFences(int offset, int size)
/// <returns>Number of fences for the specified region placed in storage</returns>
private int GetOverlappingFences(Span<FenceHolder> storage, int offset, int size)
{
List<FenceHolder> overlapping = new List<FenceHolder>();
int count = 0;
foreach (var kv in _fences)
for (int i = 0; i < _fences.Length; i++)
{
var fence = kv.Key;
var ownerCbIndex = kv.Value;
var fence = _fences[i];
if (_bufferUsageBitmap.OverlapsWith(ownerCbIndex, offset, size))
if (fence != null && _bufferUsageBitmap.OverlapsWith(i, offset, size))
{
overlapping.Add(fence);
storage[count++] = fence;
}
}
return overlapping.ToArray();
return count;
}
}
}

14
src/Ryujinx.Graphics.Vulkan/PersistentFlushBuffer.cs
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@ -34,16 +34,26 @@ namespace Ryujinx.Graphics.Vulkan
public Span<byte> GetBufferData(CommandBufferPool cbp, BufferHolder buffer, int offset, int size)
{
var flushStorage = ResizeIfNeeded(size);
Auto<DisposableBuffer> srcBuffer;
using (var cbs = cbp.Rent())
{
var srcBuffer = buffer.GetBuffer(cbs.CommandBuffer);
srcBuffer = buffer.GetBuffer(cbs.CommandBuffer);
var dstBuffer = flushStorage.GetBuffer(cbs.CommandBuffer);
BufferHolder.Copy(_gd, cbs, srcBuffer, dstBuffer, offset, 0, size);
if (srcBuffer.TryIncrementReferenceCount())
{
BufferHolder.Copy(_gd, cbs, srcBuffer, dstBuffer, offset, 0, size, registerSrcUsage: false);
}
else
{
// Source buffer is no longer alive, don't copy anything to flush storage.
srcBuffer = null;
}
}
flushStorage.WaitForFences();
srcBuffer?.DecrementReferenceCount();
return flushStorage.GetDataStorage(0, size);
}