pthread_create时, 退出时要记得释放资源. 但有时由于系统限制, 线程数被限制. 解决方法如下:

linux系统中每个线程都拥有独立的栈空间, 可用ulimit -a查看限制大小, 如下:
core file size          (blocks, -c) 0
data seg size           (kbytes, -d) unlimited
scheduling priority             (-e) 0
file size               (blocks, -f) unlimited
pending signals                 (-i) 63437
max locked memory       (kbytes, -l) 64
max memory size         (kbytes, -m) unlimited
open files                      (-n) 1024
pipe size            (512 bytes, -p) 8
POSIX message queues     (bytes, -q) 819200
real-time priority              (-r) 0
stack size              (kbytes, -s) 8192
cpu time               (seconds, -t) unlimited
max user processes              (-u) 63437
virtual memory          (kbytes, -v) unlimited
file locks                      (-x) unlimited

stack size              (kbytes, -s) 8192

这里显示为8M,  线程数就被这里限制了.改变线程栈大小方法如下:

1. ulimit -s xxx

2. pthread_attr_setstacksize

https://www.cnblogs.com/qq78292959/archive/2012/03/29/2423821.html