443 lines
15 KiB
C#
443 lines
15 KiB
C#
//-----------------------------------------------------------------------
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// -----------------------------------------------------------------------
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// file="MatrixParallelThread"
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// Project: StgSharp
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// AuthorGroup: Nitload
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// Copyright (c) Nitload. All rights reserved.
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in all
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// copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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// SOFTWARE.
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//
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// -----------------------------------------------------------------------
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// -----------------------------------------------------------------------
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using System;
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using System.Collections.Generic;
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using System.ComponentModel.DataAnnotations;
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using System.Diagnostics.CodeAnalysis;
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using System.Linq;
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using System.Runtime.CompilerServices;
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using System.Runtime.InteropServices;
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using System.Text;
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using System.Threading.Tasks;
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namespace StgSharp.Mathematics.Numeric
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{
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public partial class MatrixParallelThread : IDisposable
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{
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// Affinity binding info for this thread
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private AffinityBinding _affinity;
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private bool _affinityApplied;
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private bool disposedValue;
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private readonly ManualResetEventSlim _resetEvent;
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private readonly Thread _managedThread;
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public MatrixParallelThread()
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{
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// Allocate a unique logical processor for this worker (mutually exclusive)
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_affinity = AffinityAllocator.Allocate();
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_resetEvent = new ManualResetEventSlim(false);
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_managedThread = new Thread(MatrixParallelWorker);
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_managedThread.Start();
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}
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// Global runtime switch: true => UMA/no-affinity; false => NUMA/affinity (auto-detected)
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public static bool UseUmaAffinityPath { get; } = DetectUmaAffinityPath();
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// ~MatrixComputeThread()
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// {
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// Dispose(disposing: false);
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// }
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public ThreadPriority AfterWork
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{
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get => field;
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set => field = value;
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}
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internal ManualResetEventSlim? LeaderEvent { get; set; }
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public void Dispose()
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{
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Dispose(disposing:true);
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GC.SuppressFinalize(this);
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}
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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public static unsafe void ExecuteTaskPackage(Queue<IntPtr> taskQueue)
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{
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while (taskQueue.TryDequeue(out nint handle))
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{
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MatrixParallelTaskPackage* p = (MatrixParallelTaskPackage*)handle;
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switch (p->ComputeMode.OperationStyle)
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{
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case MatrixOperationStyle.PANEL_OP:
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break;
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case MatrixOperationStyle.BUFFER_OP:
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switch (p->ComputeMode.ParameterStyle)
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{
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case MatrixOperationParam.RIGHT_ANS_PARAM:
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MatrixComputeModel.BufferComputeUnary(p);
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break;
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case MatrixOperationParam.LEFT_RIGHT_ANS_PARAM:
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MatrixComputeModel.BufferComputeBinary(p);
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break;
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case MatrixOperationParam.RIGHT_ANS_SCALAR_PARAM:
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MatrixComputeModel.BufferComputeUnaryScalar(p);
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break;
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case MatrixOperationParam.LEFT_RIGHT_ANS_SCALAR_PARAM:
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break;
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case MatrixOperationParam.ANS_SCALAR_PARAM:
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MatrixComputeModel.BufferComputeNoOperatorScalar(p);
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break;
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default:
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break;
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}
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break;
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case MatrixOperationStyle.KERNEL_OP:
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switch (p->ComputeMode.ParameterStyle)
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{
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case MatrixOperationParam.RIGHT_ANS_PARAM:
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MatrixComputeModel.KernelComputeUnary(p);
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break;
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case MatrixOperationParam.RIGHT_ANS_SCALAR_PARAM:
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MatrixComputeModel.KernelComputeUnaryScalar(p);
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break;
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case MatrixOperationParam.LEFT_RIGHT_ANS_PARAM:
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MatrixComputeModel.KernelComputeBinary(p);
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break;
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case MatrixOperationParam.LEFT_RIGHT_ANS_SCALAR_PARAM:
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MatrixComputeModel.KernelComputeBinaryScalar(p);
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break;
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default:
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break;
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}
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break;
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default:
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break;
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}
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}
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}
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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public void Restart()
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{
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if (Role == RoleType.Leader)
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{
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LeaderEvent?.Set();
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} else
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{
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_resetEvent.Set();
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}
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}
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internal void MatrixParallelLeader()
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{
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Thread current = Thread.CurrentThread;
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current.Priority = ThreadPriority.Highest;
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LeaderEvent?.Wait();
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LeaderEvent?.Reset();
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// Console.WriteLine("Leader is computing");
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#if WINDOWS
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if (!UseUmaAffinityPath)
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{
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// NUMA/affinity path: bind to this thread's reserved mask, then restore
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nuint previousMask = SetThreadAffinityMask(GetCurrentThread(), _affinity.Mask);
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bool affinityChanged = previousMask != 0; // nonzero => success
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Thread.Sleep(0);
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ExecuteTaskPackage(Tasks);
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if (affinityChanged) {
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_ = SetThreadAffinityMask(GetCurrentThread(), previousMask);
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}
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} else
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{
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// UMA path: no affinity binding
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ExecuteTaskPackage(Tasks);
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}
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#else
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// Non-Windows: no affinity control
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ExecuteTaskPackage(Tasks);
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#endif
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BindedWrap.ReportThreadAccomplished();
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// Console.WriteLine("leader's computing is done");
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Role = RoleType.Worker;
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LeaderEvent = null;
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current.Priority = ThreadPriority.Normal;
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}
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protected virtual void Dispose(bool disposing)
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{
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if (!disposedValue)
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{
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if (disposing)
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{
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_resetEvent.Dispose();
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_managedThread.Join();
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}
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// Release the reserved logical processor back to the pool
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AffinityAllocator.Release(_affinity.LogicalProcessor);
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disposedValue = true;
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}
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}
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private static bool DetectUmaAffinityPath()
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{
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#if WINDOWS
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try
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{
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// Quick heuristic: single CPU looks like UMA
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if (Environment.ProcessorCount <= 1)
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{
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return true;
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}
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// Query NUMA topology: highest node number 0 => single node => UMA
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uint highest = 0;
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if (GetNumaHighestNodeNumber(out highest)) {
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return highest == 0;
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}
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// If query fails, prefer UMA (safer: no affinity changes)
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return true;
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}
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catch
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{
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return true;
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}
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#else
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// Non-Windows: treat as UMA (no affinity API available)
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return true;
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#endif
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}
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private unsafe void MatrixParallelWorker()
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{
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// Bind OS-thread affinity once when the worker starts running
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ApplyAffinityIfNeeded();
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while (true)
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{
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// Thread self = Thread.CurrentThread;
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_managedThread.Priority = ThreadPriority.Highest;
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_resetEvent.Wait();
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_resetEvent.Reset();
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switch (Role)
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{
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case RoleType.Worker://worker
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// _ = Interlocked.Decrement(ref RemainThreadCount);
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// Console.WriteLine("worker start");
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ExecuteTaskPackage(Tasks);
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BindedWrap.ReportThreadAccomplished();
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// Console.WriteLine("worker end");
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break;
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case RoleType.Scheduler://scheduler
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// Console.WriteLine("scheduler start");
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BindedWrap.PublishTaskToWorkers();
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BindedWrap.SetAllWorker();
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// Console.WriteLine("scheduler done");
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ExecuteTaskPackage(Tasks);
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BindedWrap.ReportThreadAccomplished();
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BindedWrap.WaitAllWorker();
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BindedWrap.ReportWrapAccomplished();
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Role = RoleType.Worker;
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break;
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case RoleType.Leader://leader, error because leader should be at outer thread but not here
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break;
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default:
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break;
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}
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_managedThread.Priority = AfterWork;
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}
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}
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#region core affinity
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/*
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* data to record core affinity
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* preparation for future NUMA affinity setting
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*/
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// Represents the binding information for a worker thread
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internal readonly struct AffinityBinding
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{
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public readonly int LogicalProcessor;
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public readonly nuint Mask;
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public AffinityBinding(int logicalProcessor, nuint mask)
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{
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LogicalProcessor = logicalProcessor;
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Mask = mask;
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}
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}
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// Thread-safe allocator that hands out unique logical processors (mutually exclusive)
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internal static class AffinityAllocator
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{
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// Bitset of reserved logical processors (0..63). One bit per CPU.
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private static long s_reservedMask; // treat as unsigned bits
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public static AffinityBinding Allocate()
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{
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int cpuCount = Environment.ProcessorCount;
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if (cpuCount > 64)
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{
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cpuCount = 64; // SetThreadAffinityMask supports up to 64-bit mask
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}
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while (true)
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{
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long snapshot = Volatile.Read(ref s_reservedMask);
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// Find first zero bit
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int candidate = -1;
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long bit = 0;
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for (int i = 0; i < cpuCount; i++)
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{
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bit = 1L << i;
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if ((snapshot & bit) == 0)
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{
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candidate = i;
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break;
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}
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}
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if (candidate < 0)
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{
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// No free CPU found: fall back to CPU 0 (shared)
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return new AffinityBinding(0, (nuint)1);
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}
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long desired = snapshot | bit;
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if (Interlocked.CompareExchange(ref s_reservedMask, desired, snapshot) == snapshot)
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{
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// Successfully reserved candidate
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nuint mask = (nuint)(1UL << candidate);
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return new AffinityBinding(candidate, mask);
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}
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// else: another thread raced us; retry
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}
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}
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public static void Release(int logicalProcessor)
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{
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if ((uint)logicalProcessor >= 64u) {
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return;
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}
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long bit = 1L << logicalProcessor;
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while (true)
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{
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long snapshot = Volatile.Read(ref s_reservedMask);
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if ((snapshot & bit) == 0)
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{
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return; // already free
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}
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long desired = snapshot & ~bit;
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if (Interlocked.CompareExchange(ref s_reservedMask, desired, snapshot) == snapshot) {
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return;
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}
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}
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}
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}
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private void ApplyAffinityIfNeeded()
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{
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if (_affinityApplied) {
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return;
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}
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#if WINDOWS
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try
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{
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// On Windows pin the current native thread to the reserved logical processor
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SetThreadAffinityMask(GetCurrentThread(), _affinity.Mask);
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}
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catch
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{
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// Ignore binding errors; continue without affinity
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}
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#elif LINUX
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#endif
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_affinityApplied = true;
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}
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#endregion
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#if WINDOWS
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[DllImport("kernel32.dll")]
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private static extern IntPtr GetCurrentThread();
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[DllImport("kernel32.dll")]
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private static extern nuint SetThreadAffinityMask(
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IntPtr hThread,
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nuint dwThreadAffinityMask);
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[LibraryImport("kernel32.dll")]
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[return: MarshalAs(UnmanagedType.Bool)]
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private static partial bool GetNumaHighestNodeNumber(out uint HighestNodeNumber);
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#elif LINUX
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#endif
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#region wrap belong
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internal MatrixParallelWrap BindedWrap { get; set; } = null!;
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internal Queue<IntPtr> Tasks { get; } = [];
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public RoleType Role
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{
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get;
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internal set
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{
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// Console.WriteLine($"Thread {_managedThread.ManagedThreadId} set to {value}, from thread {Environment.CurrentManagedThreadId}");
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field = value;
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}
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}
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public enum RoleType : int
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{
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Worker = 0,
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Scheduler = 1,
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Leader = 2,
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}
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#endregion
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}
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}
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