C OpenMP:libgomp:线程创建失败:资源暂时不可用 [英] C OpenMP : libgomp: Thread creation failed: Resource temporarily unavailable

问题描述

我正在尝试做一个基本项目，但似乎线程用完了?你们知道我该如何解决这个问题吗?

I was trying to do a p basic project and It seems like I have run out of threads? Do you guys know how do can I fix the problem?

代码如下:

int main()
{
    omp_set_num_threads(2150);
    #pragma omp parallel
    {
        printf("%d\n",omp_get_thread_num());
    }


    return 0;
}

这里是我在其他编译器选项"上写的全局编译器设置在代码块上:

and here is the global compiler setting I have written on "other compiler options" on CodeBlocks:

-fopenmp

我收到以下错误:

libgomp:线程创建失败:资源暂时不可用

libgomp: Thread creation failed: Resource temporarily unavailable

我在网站上看到过类似的帖子，但我还没有得到答案或解决方案.

I have seen similar threads on the site, but I have not got the answer or solution as of yet.

规格:

英特尔 i5 6400

Intel i5 6400

2x8GB 内存

Windows 10 64 位

Windows 10 64 bit

推荐答案

问题是

omp_set_num_threads(2150);

操作系统会对进程可以创建的线程数施加限制.这可以是间接的，例如通过限制堆栈大小.创2150超限.

The OS will impose a limit on the number of threads a process can create. This may be indirect for example by limiting the stack size. Creating 2150 exceeds the limits.

您提到您拥有四核芯片 intel 15 6400.尝试将线程数设置为更合理的值.在你的情况下:

You mention that you've got the intel 15 6400 which is a quad core chip. Try setting the number of threads to something more reasonable. In your case:

omp_set_num_threads(4);

对于数值处理，在 4 核系统上使用超过 4 个线程时，性能可能会受到影响

For numerical processing, performance will likely suffer when using more than 4 threads on a 4 core system

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