线程占用内存多大？

#include 
#include 
 
int main()
{
//      char *p =(char *) malloc(1024*1024);
 
        while(1)
        {
                sleep(1);
        }
        return 0;
}

主线程main占用内存大小为4188K ，大约4M

示例2：

#include 
#include 
#include 
#include 
void *Thread1(void *)
{
        while(1)
        {
                sleep(1);
        }
}
 
int main()
{
        int ret = 0;
        pthread_t threadid;
        ret = pthread_create(&threadid, NULL, Thread1, NULL);
        if(ret == -1)
        {
                printf("create thread failed!!!\n");
        }
        while(1)
        {
                sleep(1);
        }
        return 0;
}

main线程+Thread1线程 占用大小位14684K  Thread1占用= 14684-4188=10M

示例3：

#include 
#include 
#include 
#include 
void *Thread1(void *)
{
        while(1)
        {
                sleep(1);
        }
}
void *Thread2(void *)
{
        while(1)
        {
                sleep(1);
        }
}
int main()
{
        int ret = 0;
        pthread_t threadid1,threadid2;
        ret = pthread_create(&threadid1, NULL, Thread1, NULL);
        if(ret == -1)
        {
                printf("create thread failed!!!\n");
        }
        ret = pthread_create(&threadid2, NULL, Thread2, NULL);
        if(ret == -1)
        {
                printf("create thread failed!!!\n");
        }
        while(1)
        {
                sleep(1);
        }
        return 0;
}

main线程+Thread1线程+ Thread2线程 占用内存为22880K Thread2占用内存=22880-14684=8M