如何在Parallel.For中配置最大线程数

Question

这是microsoft为parallel提供的示例，我想知道如何为此代码配置最大线程数。

     // A basic matrix multiplication.
     // Parallelize the outer loop to partition the source array by rows.
     System.Threading.Tasks.Parallel.For(0, matARows, i =>
     {
        for (int j = 0; j < matBCols; j++)
        {
           // Use a temporary to improve parallel performance.
           double temp = 0;
           for (int k = 0; k < matACols; k++)
           {
              temp += matA[i, k] * matB[k, j];
           }
           result[i, j] = temp;
        }
     }); // Parallel.For

Answer 1

您需要使用MaxDegreeOfParallelism指定ParallelOptions值：

例如：

Parallel.For(0, 10, new ParallelOptions { MaxDegreeOfParallelism = 4 }, count =>
{
    Console.WriteLine(count);
});

Answer 2

使用MaxDegreeOfParalelism属性来运行循环

Parallel.For(0, 1000, new ParallelOptions { MaxDegreeOfParallelism = 2 }, ...);

Answer 3

我建议您查看ParallelOption.MaxDegreesofParellelism并将其传递给For方法