Did you look at using the RDTSC instruction to read the cycle counter? http://en.wikipedia.org/wiki/Time_Stamp_Counter Sample this over an interval to get an estimate of the clock frequency based on this counter. __inline__ unsigned long long int rdtsc() { unsigned long long int x; __asm__ volatile (".byte 0x0f, 0x31" : "=A" (x)); return(x); } I use gettimeofday() calls to check the wall-clock time, usleep(n) to sleep for a long time (second or more), and rdtsc to compute the cycles.... Seems to work well. Cheers, -- Wade Hampton -- users mailing list users@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe or change subscription options: https://admin.fedoraproject.org/mailman/listinfo/users Guidelines: http://fedoraproject.org/wiki/Mailing_list_guidelines
