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#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <pthread.h>
#include <signal.h>
#include <string.h>
void * thr_fun(void *arg)
{
int policy, ret;
struct sched_param param;
//»ñÈ¡Ï̵߳÷¶È²ÎÊý
ret = pthread_getschedparam(pthread_self(), &policy, &param);
if(ret!=0)
{
printf("pthread_getschedparam %s\n", strerror(ret) );
exit(1);
}
if (policy == SCHED_FIFO)
{
printf("policy:SCHED_FIFO\n");
}
else if (policy == SCHED_OTHER)
{
printf("policy:SCHED_OTHER\n");
}
else if (policy == SCHED_RR)
{
printf("policy:SCHED_RR\n");
}
printf("param:%d\n", param.sched_priority);
long long i;
while (1) {
i++;
i *= 2;
}
pthread_exit(NULL);
}
int main(void)
{
int ret;
pthread_t tid;
pthread_attr_t attr;
int policy, inher;
struct sched_param param;

//³õʼ»¯Ïß³ÌÊôÐÔ
pthread_attr_init(&attr);
//»ñÈ¡¼Ì³ÐµÄµ÷¶È²ßÂÔ
ret = pthread_attr_getinheritsched(&attr, &inher);
if (ret!=0)
{
printf("pthread_attr_getinheritsched\n%s\n", strerror(ret));
exit(1);
}
//
if (inher == PTHREAD_EXPLICIT_SCHED)
{
printf("PTHREAD_EXPLICIT_SCHED\n");
}
else if (inher == PTHREAD_INHERIT_SCHED)
{
printf("PTHREAD_INHERIT_SCHED\n");
inher = PTHREAD_EXPLICIT_SCHED;
}
//ÉèÖü̳еĵ÷¶È²ßÂÔ
//±ØÐèÉèÖÃinherµÄÊôÐÔΪ PTHREAD_EXPLICIT_SCHED£¬·ñÔòÉèÖÃÏ̵߳ÄÓÅÏȼ¶»á±»ºöÂÔ
ret = pthread_attr_setinheritsched(&attr, inher);
if (ret!=0)
{
printf("pthread_attr_setinheritsched\n%s\n", strerror(ret));
exit(1);
}

policy = SCHED_FIFO;//ÔÚUbuntu9.10ÉÏÐèÒªrootȨÏÞ
//ÉèÖÃÏ̵߳÷¶È²ßÂÔ
ret = pthread_attr_setschedpolicy(&attr, policy);
if (ret!=0)
{
printf(" pthread_attr_setschedpolicy\n%s\n", strerror(ret));
exit(1);
}
param.sched_priority = 3;
//ÉèÖõ÷¶È²ÎÊý
ret = pthread_attr_setschedparam(&attr,


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