#include <stdio.h>
#include <stdlib.h>
#include <sys/time.h>
#include <time.h>
#include <sched.h>
#include <sys/types.h>
#include <unistd.h>
//pipe()
int main()
{
int x, i, fd[2], p[2];
char send = 's';
char receive;
pipe(fd);
pipe(p);
struct timeval tv;
struct sched_param param;
param.sched_priority = 0;
while ((x = fork()) == -1);
if (x==0)
{
sched_setscheduler(getpid(), SCHED_FIFO, ¶m);
gettimeofday(&tv, NULL);
printf("Before Context Switch Time%u s, %u usn", tv.tv_sec, tv.tv_usec);
for (i = 0; i < 10000; i++)
{
read(fd[0], &receive, 1);
write(p[1], &send, 1);
}
exit(0);
} else
{
sched_setscheduler(getpid(), SCHED_FIFO, ¶m);
for (i = 0; i < 10000; i++)
{
write(fd[1], &send, 1);
read(p[0], &receive, 1);
}
gettimeofday(&tv, NULL);
printf("After Context SWitch Time%u s, %u usn", tv.tv_sec, tv.tv_usec);
}
return 0;
}