使用睡眠时的pthread调度问题

Question

I spawn four detachable threads and in each thread i am giving 1 second sleep (sleep is my application requirement) because of that OS only schedule the 2 threads and other two threads are sitting ideal but if i remove sleep all threads are scheduled by OS but my application requirement is each thread should go to sleep mode once it complete its task

I already tried sleep, nanosleep and set the threads properties, priority and round robin scheduling in pthread but not success.

Please suggest what else I can do to solve my application issue.

Answer 1

Now I am giving one second interval for each thread using below logic and removed the sleep from my code and issue is resolved (now all four threads are scheduled).

(void) gettimeofday (&nowtime, NULL);
unsigned long long currentTime = (nowtime.tv_sec * 1000000) + nowtime.tv_usec;
unsigned long long FutureTime =  ((nowtime.tv_sec + interval) * 1000000) + nowtime.tv_usec;
while(FutureTime >= currentTime)
{
    (void) gettimeofday (&nowtime, NULL);
    currentTime = (nowtime.tv_sec * 1000000) + nowtime.tv_usec;
}