循环pthread_create导致虚拟内存上涨
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//测试pthread_create创建太快导致虚拟内存一直上涨直至上限
//pthread_create_test.c
#include <pthread.h>
#include <stdio.h>
#include <sys/wait.h>
#define WAITTIME 500000
void * Client_TS_handle_ss_local_data_cmd(void * arg)
{
printf("enter local ss handler\n");
printf("leave local ss handler\n");
usleep(WAITTIME);
pthread_detach(pthread_self());
pthread_exit(NULL);
}
void * Client_TS_handle_up_local_data_cmd(void * arg)
{
printf("enter local up handler\n");
printf("leave local up handler\n");
usleep(WAITTIME);
pthread_detach(pthread_self());
pthread_exit(NULL);
}
int main()
{
pthread_t _local_up_thread;
pthread_t _local_ss_thread;
while(1)
{
if(pthread_create(&_local_up_thread,NULL,Client_TS_handle_up_local_data_cmd,NULL)!=0)
{
perror("Error Creating UP Thread");
}
usleep(1000);
if(pthread_create(&_local_ss_thread,NULL,Client_TS_handle_ss_local_data_cmd,NULL)!=0)
{
perror("Error Creating SS Thread");
}
}
return 0;
}
编译运行后查看虚拟内存上涨,导致这个原因是因为pthread_create创建线程太快,而且每个线程运行时间都教长,因此循环创建线程都需要注意这个问题,现在的解决方法是在pthread_create创建线程之后添加usleep()使其休眠一段时间,具体时间可以使用算法动态修改,也可以确定一个定值