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Clean up rejit queue (#2751)

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FICTURE7 2022-09-09 03:14:08 +04:00 committed by GitHub
parent 7baa08dcb4
commit ee1825219b
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5 changed files with 225 additions and 119 deletions
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4
ARMeilleure/Common/AddressTable.cs
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@ -1,4 +1,4 @@
using ARMeilleure.Diagnostics.EventSources;
using ARMeilleure.Diagnostics;
using System;
using System.Collections.Generic;
using System.Runtime.InteropServices;
@ -218,7 +218,7 @@ namespace ARMeilleure.Common
_pages.Add(page);
AddressTableEventSource.Log.Allocated(size, leaf);
TranslatorEventSource.Log.AddressTableAllocated(size, leaf);
return page;
}

51
ARMeilleure/Diagnostics/EventSources/AddressTableEventSource.cs
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@ -1,51 +0,0 @@
using System.Diagnostics.Tracing;
namespace ARMeilleure.Diagnostics.EventSources
{
[EventSource(Name = "ARMeilleure")]
class AddressTableEventSource : EventSource
{
public static readonly AddressTableEventSource Log = new();
private ulong _size;
private ulong _leafSize;
private PollingCounter _sizeCounter;
private PollingCounter _leafSizeCounter;
public AddressTableEventSource()
{
_sizeCounter = new PollingCounter("addr-tab-alloc", this, () => _size / 1024d / 1024d)
{
DisplayName = "AddressTable Total Bytes Allocated",
DisplayUnits = "MB"
};
_leafSizeCounter = new PollingCounter("addr-tab-leaf-alloc", this, () => _leafSize / 1024d / 1024d)
{
DisplayName = "AddressTable Total Leaf Bytes Allocated",
DisplayUnits = "MB"
};
}
public void Allocated(int bytes, bool leaf)
{
_size += (uint)bytes;
if (leaf)
{
_leafSize += (uint)bytes;
}
}
protected override void Dispose(bool disposing)
{
_leafSizeCounter.Dispose();
_leafSizeCounter = null;
_sizeCounter.Dispose();
_sizeCounter = null;
base.Dispose(disposing);
}
}
}

67
ARMeilleure/Diagnostics/TranslatorEventSource.cs Normal file
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@ -0,0 +1,67 @@
using System.Diagnostics.Tracing;
using System.Threading;
namespace ARMeilleure.Diagnostics
{
[EventSource(Name = "ARMeilleure")]
class TranslatorEventSource : EventSource
{
public static readonly TranslatorEventSource Log = new();
private int _rejitQueue;
private ulong _funcTabSize;
private ulong _funcTabLeafSize;
private PollingCounter _rejitQueueCounter;
private PollingCounter _funcTabSizeCounter;
private PollingCounter _funcTabLeafSizeCounter;
public TranslatorEventSource()
{
_rejitQueueCounter = new PollingCounter("rejit-queue-length", this, () => _rejitQueue)
{
DisplayName = "Rejit Queue Length"
};
_funcTabSizeCounter = new PollingCounter("addr-tab-alloc", this, () => _funcTabSize / 1024d / 1024d)
{
DisplayName = "AddressTable Total Bytes Allocated",
DisplayUnits = "MB"
};
_funcTabLeafSizeCounter = new PollingCounter("addr-tab-leaf-alloc", this, () => _funcTabLeafSize / 1024d / 1024d)
{
DisplayName = "AddressTable Total Leaf Bytes Allocated",
DisplayUnits = "MB"
};
}
public void RejitQueueAdd(int count)
{
Interlocked.Add(ref _rejitQueue, count);
}
public void AddressTableAllocated(int bytes, bool leaf)
{
_funcTabSize += (uint)bytes;
if (leaf)
{
_funcTabLeafSize += (uint)bytes;
}
}
protected override void Dispose(bool disposing)
{
_rejitQueueCounter.Dispose();
_rejitQueueCounter = null;
_funcTabLeafSizeCounter.Dispose();
_funcTabLeafSizeCounter = null;
_funcTabSizeCounter.Dispose();
_funcTabSizeCounter = null;
base.Dispose(disposing);
}
}
}

101
ARMeilleure/Translation/Translator.cs
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@ -44,15 +44,11 @@ namespace ARMeilleure.Translation
private readonly IJitMemoryAllocator _allocator;
private readonly ConcurrentQueue<KeyValuePair<ulong, TranslatedFunction>> _oldFuncs;
private readonly ConcurrentDictionary<ulong, object> _backgroundSet;
private readonly ConcurrentStack<RejitRequest> _backgroundStack;
private readonly AutoResetEvent _backgroundTranslatorEvent;
private readonly ReaderWriterLock _backgroundTranslatorLock;
internal TranslatorCache<TranslatedFunction> Functions { get; }
internal AddressTable<ulong> FunctionTable { get; }
internal EntryTable<uint> CountTable { get; }
internal TranslatorStubs Stubs { get; }
internal TranslatorQueue Queue { get; }
internal IMemoryManager Memory { get; }
private volatile int _threadCount;
@ -67,10 +63,7 @@ namespace ARMeilleure.Translation
_oldFuncs = new ConcurrentQueue<KeyValuePair<ulong, TranslatedFunction>>();
_backgroundSet = new ConcurrentDictionary<ulong, object>();
_backgroundStack = new ConcurrentStack<RejitRequest>();
_backgroundTranslatorEvent = new AutoResetEvent(false);
_backgroundTranslatorLock = new ReaderWriterLock();
Queue = new TranslatorQueue();
JitCache.Initialize(allocator);
@ -87,43 +80,6 @@ namespace ARMeilleure.Translation
}
}
private void TranslateStackedSubs()
{
while (_threadCount != 0)
{
_backgroundTranslatorLock.AcquireReaderLock(Timeout.Infinite);
if (_backgroundStack.TryPop(out RejitRequest request) &&
_backgroundSet.TryRemove(request.Address, out _))
{
TranslatedFunction func = Translate(request.Address, request.Mode, highCq: true);
Functions.AddOrUpdate(request.Address, func.GuestSize, func, (key, oldFunc) =>
{
EnqueueForDeletion(key, oldFunc);
return func;
});
if (PtcProfiler.Enabled)
{
PtcProfiler.UpdateEntry(request.Address, request.Mode, highCq: true);
}
RegisterFunction(request.Address, func);
_backgroundTranslatorLock.ReleaseReaderLock();
}
else
{
_backgroundTranslatorLock.ReleaseReaderLock();
_backgroundTranslatorEvent.WaitOne();
}
}
// Wake up any other background translator threads, to encourage them to exit.
_backgroundTranslatorEvent.Set();
}
public void Execute(State.ExecutionContext context, ulong address)
{
if (Interlocked.Increment(ref _threadCount) == 1)
@ -155,7 +111,7 @@ namespace ARMeilleure.Translation
{
bool last = i != 0 && i == unboundedThreadCount - 1;
Thread backgroundTranslatorThread = new Thread(TranslateStackedSubs)
Thread backgroundTranslatorThread = new Thread(BackgroundTranslate)
{
Name = "CPU.BackgroundTranslatorThread." + i,
Priority = last ? ThreadPriority.Lowest : ThreadPriority.Normal
@ -186,10 +142,9 @@ namespace ARMeilleure.Translation
if (Interlocked.Decrement(ref _threadCount) == 0)
{
_backgroundTranslatorEvent.Set();
ClearJitCache();
Queue.Dispose();
Stubs.Dispose();
FunctionTable.Dispose();
CountTable.Dispose();
@ -317,6 +272,27 @@ namespace ARMeilleure.Translation
return new TranslatedFunction(func, counter, funcSize, highCq);
}
private void BackgroundTranslate()
{
while (_threadCount != 0 && Queue.TryDequeue(out RejitRequest request))
{
TranslatedFunction func = Translate(request.Address, request.Mode, highCq: true);
Functions.AddOrUpdate(request.Address, func.GuestSize, func, (key, oldFunc) =>
{
EnqueueForDeletion(key, oldFunc);
return func;
});
if (PtcProfiler.Enabled)
{
PtcProfiler.UpdateEntry(request.Address, request.Mode, highCq: true);
}
RegisterFunction(request.Address, func);
}
}
private struct Range
{
public ulong Start { get; }
@ -504,11 +480,7 @@ namespace ARMeilleure.Translation
internal void EnqueueForRejit(ulong guestAddress, ExecutionMode mode)
{
if (_backgroundSet.TryAdd(guestAddress, null))
{
_backgroundStack.Push(new RejitRequest(guestAddress, mode));
_backgroundTranslatorEvent.Set();
}
Queue.Enqueue(guestAddress, mode);
}
private void EnqueueForDeletion(ulong guestAddress, TranslatedFunction func)
@ -542,26 +514,23 @@ namespace ARMeilleure.Translation
private void ClearRejitQueue(bool allowRequeue)
{
_backgroundTranslatorLock.AcquireWriterLock(Timeout.Infinite);
if (allowRequeue)
if (!allowRequeue)
{
while (_backgroundStack.TryPop(out var request))
Queue.Clear();
return;
}
lock (Queue.Sync)
{
while (Queue.Count > 0 && Queue.TryDequeue(out RejitRequest request))
{
if (Functions.TryGetValue(request.Address, out var func) && func.CallCounter != null)
{
Volatile.Write(ref func.CallCounter.Value, 0);
}
_backgroundSet.TryRemove(request.Address, out _);
}
}
else
{
_backgroundStack.Clear();
}
_backgroundTranslatorLock.ReleaseWriterLock();
}
}
}

121
ARMeilleure/Translation/TranslatorQueue.cs Normal file
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@ -0,0 +1,121 @@
using ARMeilleure.Diagnostics;
using ARMeilleure.State;
using System;
using System.Collections.Generic;
using System.Threading;
namespace ARMeilleure.Translation
{
/// <summary>
/// Represents a queue of <see cref="RejitRequest"/>.
/// </summary>
/// <remarks>
/// This does not necessarily behave like a queue, i.e: a FIFO collection.
/// </remarks>
sealed class TranslatorQueue : IDisposable
{
private bool _disposed;
private readonly Stack<RejitRequest> _requests;
private readonly HashSet<ulong> _requestAddresses;
/// <summary>
/// Gets the object used to synchronize access to the <see cref="TranslatorQueue"/>.
/// </summary>
public object Sync { get; }
/// <summary>
/// Gets the number of requests in the <see cref="TranslatorQueue"/>.
/// </summary>
public int Count => _requests.Count;
/// <summary>
/// Initializes a new instance of the <see cref="TranslatorQueue"/> class.
/// </summary>
public TranslatorQueue()
{
Sync = new object();
_requests = new Stack<RejitRequest>();
_requestAddresses = new HashSet<ulong>();
}
/// <summary>
/// Enqueues a request with the specified <paramref name="address"/> and <paramref name="mode"/>.
/// </summary>
/// <param name="address">Address of request</param>
/// <param name="mode"><see cref="ExecutionMode"/> of request</param>
public void Enqueue(ulong address, ExecutionMode mode)
{
lock (Sync)
{
if (_requestAddresses.Add(address))
{
_requests.Push(new RejitRequest(address, mode));
TranslatorEventSource.Log.RejitQueueAdd(1);
Monitor.Pulse(Sync);
}
}
}
/// <summary>
/// Tries to dequeue a <see cref="RejitRequest"/>. This will block the thread until a <see cref="RejitRequest"/>
/// is enqueued or the <see cref="TranslatorQueue"/> is disposed.
/// </summary>
/// <param name="result"><see cref="RejitRequest"/> dequeued</param>
/// <returns><see langword="true"/> on success; otherwise <see langword="false"/></returns>
public bool TryDequeue(out RejitRequest result)
{
while (!_disposed)
{
lock (Sync)
{
if (_requests.TryPop(out result))
{
_requestAddresses.Remove(result.Address);
TranslatorEventSource.Log.RejitQueueAdd(-1);
return true;
}
Monitor.Wait(Sync);
}
}
result = default;
return false;
}
/// <summary>
/// Clears the <see cref="TranslatorQueue"/>.
/// </summary>
public void Clear()
{
lock (Sync)
{
TranslatorEventSource.Log.RejitQueueAdd(-_requests.Count);
_requests.Clear();
_requestAddresses.Clear();
Monitor.PulseAll(Sync);
}
}
/// <summary>
/// Releases all resources used by the <see cref="TranslatorQueue"/> instance.
/// </summary>
public void Dispose()
{
if (!_disposed)
{
_disposed = true;
Clear();
}
}
}
}