unsigned loop_time_overhead() {
unsigned ccnt = 0;
ccnt = ccnt_read();
for (int i = 0; i < LOOP_TIME_TEST_NUM; i++) { }
ccnt = ccnt_read() - ccnt;
return ccnt / LOOP_TIME_TEST_NUM;
}
unsigned reading_time_overhead() {
unsigned ccnt = 0;
unsigned total_ccnt = 0;
for (int i = 0; i < OVERHEAD_TEST_NUM; i++) {
ccnt = ccnt_read();
ccnt = ccnt_read() - ccnt;
total_ccnt += ccnt;
}
return total_ccnt / OVERHEAD_TEST_NUM;
}
unsigned get_overhead() {
unsigned t;
float total = 0;
for (int i = 0; i < OVERHEAD_TEST_NUM; i++) {
t = ccnt_read();
t = ccnt_read() - t;
total += (float)t;
// printf("%dth measurement overhead: %u\n",i, t);
}
printf("Avg measurement overhead: %f\n", (float)total/OVERHEAD_TEST_NUM);
return (total/OVERHEAD_TEST_NUM);
}
void counter_stop(void)
{
c2 = ccnt_read();
}
void counter_start(void)
{
c1 = ccnt_read();
}
