执行c代码
#include<sched.h>
#include<stdio.h>
#include<stdlib.h>
#include<string.h>
#include<errno.h>
#include <math.h>
int main(int argc,char **argv)
{
long i,j,temp;
char cmd_str[100];
int rc,current_scheduler_policy;
unsigned long mask=(unsigned long)atoi(argv[3]); /* processor 0 ->valu=1,and processor 1->value=2 */
struct sched_param my_params;//将要设置的调度参数
printf("The argc value = %d,arv[3]=%d,hope is=1, argv[2]=%d,hope is=90+,argv[1]=%d
",argc,atoi(argv[3]),atoi(argv[2]),atoi(argv[1]));
/*if(argc!=4){
printf("usage:RR-FIFO-sched sched_class priority
sched_class: 0 for CFS;1 for FIFO;2 for RR
");
exit(1);
}*/
//增加绑定进程
if (sched_setaffinity(0, sizeof(mask), &mask) <0) {
perror("sched_setaffinity");
}
my_params.sched_priority = atoi(argv[2]);
rc = sched_setscheduler(0,atoi(argv[1]),&my_params);
if(rc<0){
perror("sched_setscheduler error
");
exit(0);
}
current_scheduler_policy = sched_getscheduler(0);
printf("the PID:%d current scheduler=%d
",getpid(),current_scheduler_policy);
for(i=0;i<1024*1024*1024;i++){
for(j=0;j<10;j++)
temp++;
}
//while(1);
sprintf(cmd_str,"cat /proc/%d/sched > ./sched-%d; date >> ./sched-%d",getpid(),getpid(),getpid());//sprintf
system(cmd_str);//记录各个进程的/proc/PID/sched以及时间信息
return 0;
}
通过gcc 链接成可执行文件RR-FIFO2
shell可执行脚本：
#!/usr/bin/bash echo Running a shell #./RR-FIFO-sched 2 90 1& #./RR-FIFO-sched 2 90 1& #taskset -c 0 ./RR-FIFO-sched 2 90& #taskset -c 0 ./RR-FIFO-sched 2 90& #sleep 5s #taskset -c 0 ./RR-FIFO-sched 1 95& #./RR-FIFO-sched 1 95 1& # SCRIP 3 ./RR-FIFO2 2 90 1& # 2 -指定进程为RR类 ， 90-priority 1 -绑定到cpu 0 &挂起 ./RR-FIFO2 2 90 1& sleep 5s ./RR-FIFO2 1 95 1&# 2 -指定进程为FIFO类 ， 90-priority 1 -绑定到cpu 0 &挂起