hertz
clockinfo.profhz = hertz();
clockinfo.profhz = hertz();
static int hertz(void);
int sysbeep(int hertz, sbintime_t duration);
gmonhdr.profrate = rate = hertz();
int hertz(void);
int hertz(void);
extern double hertz; /* sampling frequency for cp_time and dk_time */
etime /= hertz;
hertz = clkinfo.stathz;
double hertz;
etime /= hertz;