int job(struct thread_context *ctx) {
int ret;
struct timespec start, end;
litmus_lock(lock_1);
clock_gettime(CLOCK_REALTIME, &start);
loop_for(ctx->id, 0.001);
if(non_preemption == 0)
loop_for(ctx->id, 0.72);
if(non_preemption == 1)
loop_for(ctx->id, 0.000504);
clock_gettime(CLOCK_REALTIME, &end);
ret = litmus_unlock(lock_1);
if (ret != 0)
printf("%s\n", "unlock error");
ctx->response_time[ctx->execute_count] = (end.tv_sec * 1000000000 + end.tv_nsec) - (start.tv_sec * 1000000000 + start.tv_nsec);
ctx->execute_count += 1;
return 0;
}
static void fine_tune(double interval)
{
double start, end, delta;
start = wctime();
loop_for(interval);
end = wctime();
delta = (end - start - interval) / interval;
if (delta != 0)
loop_length = loop_length / (1 - delta);
}
static void debug_delay_loop(void)
{
double start, end, delay;
show_loop_length();
while (1) {
for (delay = 0.5; delay > 0.01; delay -= 0.01) {
start = wctime();
loop_for(delay);
end = wctime();
printf("%6.4fs: looped for %10.8fs, delta=%11.8fs, error=%7.4f%%\n",
delay,
end - start,
end - start - delay,
100 * (end - start - delay) / delay);
}
}
}
static int job(double exec_time)
{
loop_for(exec_time);
sleep_next_period();
return 0;
}
