如何确定.NET中的CPU缓存大小？ [英] how to determine CPU cache size in .NET?

问题描述

我想知道是否有一种方法可以确定托管代码中的CPU缓存大小吗？

I would like to know if there is a way to determine CPU cache size in managed code?

我正在编写一种Strassen算法，用于C＃中的矩阵乘法，想知道我可以在缓存中放入多少个矩阵元素以提高计算速度。

I am writing a Strassen's algorithm for matrix multiplication in C# and would like to know how many elements of the matrices I could fit into cache to improve computational speed.

推荐答案

您可以使用WMI来检索缓存信息。

You can use WMI to retrieve cache information.

您首先需要在项目中添加对 System.Management.dll 的引用，然后您可以使用以下代码：

You will first need to add a reference to System.Management.dll to your project, then you can use the following code:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Management;

namespace Scratch
{
    public enum CacheLevel : ushort 
    {
        Level1 = 3,
        Level2 = 4,
        Level3 = 5,
    }

    public static class CPUInfo
    {
        public static List<uint> GetCacheSizes(CacheLevel level)
        {
            ManagementClass mc = new ManagementClass("Win32_CacheMemory");
            ManagementObjectCollection moc = mc.GetInstances();
            List<uint> cacheSizes = new List<uint>(moc.Count);

            cacheSizes.AddRange(moc
              .Cast<ManagementObject>()
              .Where(p => (ushort)(p.Properties["Level"].Value) == (ushort)level)
              .Select(p => (uint)(p.Properties["MaxCacheSize"].Value)));

            return cacheSizes;
        }
    }
}

<$的详细信息c $ c> Win32_CacheMemory WMI类位于：

http://msdn.microsoft.com/zh-cn/library/aa394080（v = vs.85）.aspx

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