90 lines
3.7 KiB
C#
90 lines
3.7 KiB
C#
//-----------------------------------------------------------------------
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// -----------------------------------------------------------------------
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// file="Numa"
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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.Linq;
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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.Common.HighPerformance.ProcessorAbstraction
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{
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public static partial class Numa
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{
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private static NumaNode[] _numaNodes;
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public static int NumaNodeCount { get; private set; }
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public static ReadOnlySpan<NumaNode> AllNumaNode => _numaNodes;
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[LibraryImport(Native.LibName, EntryPoint = "sn_get_numa_each")]
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[UnmanagedCallConv(CallConvs = [typeof(CallConvCdecl)])]
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[DefaultDllImportSearchPaths(DllImportSearchPath.AssemblyDirectory)]
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public static partial int GetNumaEach(
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uint numaId,
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Span<ulong> CpuIndexInNuma,
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Span<uint> globalCpuIdInNuma
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);
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[LibraryImport(Native.LibName, EntryPoint = "sn_get_numa_overall")]
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[UnmanagedCallConv(CallConvs = [typeof(CallConvCdecl)])]
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[DefaultDllImportSearchPaths(DllImportSearchPath.AssemblyDirectory)]
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public static partial int GetNumaOverall(
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ref int count,
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Span<int> coreCountInNuma
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);
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internal static void Initialize()
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{
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Span<int> coreCountInNuma = stackalloc int[(Environment.ProcessorCount / 32) + 1];
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int numaNodeCount = 0;
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if (0 == GetNumaOverall(ref numaNodeCount, coreCountInNuma)) {
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throw new InvalidOperationException("Failed to get NUMA overall information.");
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}
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_numaNodes = new NumaNode[numaNodeCount];
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for (uint i = 0; i < numaNodeCount; i++) {
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_numaNodes[i] = InitNumaNode(i, coreCountInNuma[(int)i]);
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}
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}
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[MethodImpl(MethodImplOptions.NoInlining)]
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private static NumaNode InitNumaNode(
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uint numaId,
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int count
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)
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{
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Span<uint> globalIndex = stackalloc uint[count];
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Span<ulong> groupIndex = stackalloc ulong[count];
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_ = GetNumaEach(numaId, groupIndex, globalIndex);
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return new(numaId, count, globalIndex);
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}
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}
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}
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