lby/lk
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

[app][tests] add more tests to clock_tests

Browse Source
This commit is contained in:
Travis Geiselbrecht
2013-03-09 17:04:14 -08:00
parent a7ed7d2ef2
commit ec85566712
1 changed files with 66 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

68
app/tests/clock_tests.c
View File

@@ -32,16 +32,80 @@
void clock_tests(void)
{
uint32_t c;
lk_time_t t;
lk_bigtime_t t2;
thread_sleep(100);
c = arch_cycle_count();
t = current_time();
c = arch_cycle_count() - c;
printf("%u cycles per current_time()\n", c);
thread_sleep(100);
c = arch_cycle_count();
t2 = current_time_hires();
c = arch_cycle_count() - c;
printf("%u cycles per current_time_hires()\n", c);
printf("making sure time never goes backwards\n");
{
printf("testing current_time()\n");
lk_time_t start = current_time();
lk_time_t last = start;
for (;;) {
t = current_time();
//printf("%lu %lu\n", last, t);
if (TIME_LT(t, last)) {
printf("WARNING: time ran backwards: %lu < %lu\n", last, t);
}
last = t;
if (last - start > 5000)
break;
}
}
{
printf("testing current_time_hires()\n");
lk_bigtime_t start = current_time_hires();
lk_bigtime_t last = start;
for (;;) {
t2 = current_time_hires();
//printf("%llu %llu\n", last, t2);
if (t2 < last) {
printf("WARNING: time ran backwards: %llu < %llu\n", last, t2);
}
last = t2;
if (last - start > 5000000)
break;
}
}
printf("making sure current_time() and current_time_hires() are always the same base\n");
{
lk_time_t start = current_time();
for (;;) {
t = current_time();
t2 = current_time_hires();
if (t > (t2 / 1000)) {
printf("WARNING: current_time() ahead of current_time_hires() %lu %llu\n", t, t2);
}
if (t - start > 5000)
break;
}
}
printf("counting to 5, in one second intervals\n");
for (int i = 0; i < 5; i++) {
thread_sleep(1000);
printf("%d\n", i + 1);
}
printf("measuring cpu clock against time\n");
printf("measuring cpu clock against current_time_hires()\n");
for (int i = 0; i < 5; i++) {
uint cycles = arch_cycle_count();
spin(1000000);
lk_bigtime_t start = current_time_hires();
while ((current_time_hires() - start) < 1000000)
;
cycles = arch_cycle_count() - cycles;
printf("%u cycles per second\n", cycles);
}