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Linux下进程可以创建的最大线程数是多少？

如何(如果可能)可以修改此值？

我想创建一个程序来模拟Unix服务器上的内存不足(OOM)情况.我创造了这个超级简单的记忆食者:

#include <stdio.h>
#include <stdlib.h>

unsigned long long memory_to_eat = 1024 * 50000;
size_t eaten_memory = 0;
void *memory = NULL;

int eat_kilobyte()
{
    memory = realloc(memory, (eaten_memory * 1024) + 1024);
    if (memory == NULL)
    {
        // realloc failed here - we probably can't allocate more memory for whatever reason
        return 1;
    }
    else
    {
        eaten_memory++;
        return 0;
    }
}

int main(int argc, char **argv)
{
    printf("I will try to eat %i kb of ram\n", memory_to_eat);
    int megabyte = …

在运行启用了本机内存跟踪的Java应用程序(在YARN中)时(-XX:NativeMemoryTracking=detail请参阅https://docs.oracle.com/javase/8/docs/technotes/guides/vm/nmt-8.html和https:// docs. oracle.com/javase/8/docs/technotes/guides/troubleshoot/tooldescr007.html),我可以看到JVM在不同类别中使用了多少内存.

我在jdk 1.8.0_45上的应用程序显示:

Native Memory Tracking:

Total: reserved=4023326KB, committed=2762382KB
-                 Java Heap (reserved=1331200KB, committed=1331200KB)
                            (mmap: reserved=1331200KB, committed=1331200KB) 

-                     Class (reserved=1108143KB, committed=64559KB)
                            (classes #8621)
                            (malloc=6319KB #17371) 
                            (mmap: reserved=1101824KB, committed=58240KB) 

-                    Thread (reserved=1190668KB, committed=1190668KB)
                            (thread #1154)
                            (stack: reserved=1185284KB, committed=1185284KB)
                            (malloc=3809KB #5771) 
                            (arena=1575KB #2306)

-                      Code (reserved=255744KB, committed=38384KB)
                            (malloc=6144KB #8858) 
                            (mmap: reserved=249600KB, committed=32240KB) 

-                        GC (reserved=54995KB, committed=54995KB)
                            (malloc=5775KB #217) 
                            (mmap: reserved=49220KB, committed=49220KB) 

-                  Compiler (reserved=267KB, committed=267KB)
                            (malloc=137KB #333) 
                            (arena=131KB #3)

-                  Internal (reserved=65106KB, committed=65106KB)
                            (malloc=65074KB …