On 02/08/2012 09:12 PM, Richard Cochran wrote:
I think "resolution" does not mean tick duration, but rather the finest timer unit.
#include <stdio.h> #include <time.h>
int main (int argc, char *argv[]) { int i; struct timespec rs, ts[10];
clock_getres (CLOCK_REALTIME, &rs); printf ("res: %lus %luns\n", rs.tv_sec, rs.tv_nsec);
for (i = 0; i < 10; i++) clock_gettime (CLOCK_REALTIME, ts + i); for (i = 0; i < 10; i++) printf ("%d: %lus %luns\n", i, ts[i].tv_sec, ts[i].tv_nsec);
return 0; }
=>
res: 0s 10000000ns 0: 1328779203s 975317500ns 1: 1328779203s 975317900ns 2: 1328779203s 975318200ns 3: 1328779203s 975318400ns 4: 1328779203s 975318600ns 5: 1328779203s 975318800ns 6: 1328779203s 975319000ns 7: 1328779203s 975319300ns 8: 1328779203s 975319500ns 9: 1328779203s 975319600ns
Old Sun Fire 880, SunOS 5.10 Generic_139555-08.
100ns precision with 10ms "finest timer unit"???
Dmitry