Hi,
the system call sched_yield() doesn't seem to work on Linux 2.2. Does
anyone know of a kernel patch that fixes this ?
Attached below is a small program that uses pthreads and demonstrates that
sched_yield() doesn't work. Basically, the program creates two threads that
alternatively try to yield CPU to each other.
- Mohit
#include <stdio.h>
#include <sched.h>
#include <pthread.h>
static pthread_t thread1, thread2;
static void *thread1_func(void *arg)
{
int i;
for (i=0; i < 5 ;i++) {
printf("Thread1\n");
if (sched_yield()) printf("error in yielding\n");
}
}
static void *thread2_func(void *arg)
{
int i;
for (i=0; i < 5 ;i++) {
printf("Thread2\n");
if (sched_yield()) printf("error in yielding\n");
}
}
int main(int argc, char **argv)
{
pthread_create(&thread1, NULL, thread1_func, NULL);
pthread_create(&thread2, NULL, thread2_func, NULL);
sleep(10);
return 0;
}
-
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