September 4, 2001 HZ 9

### NAME

hz - system clock frequency

### SYNOPSIS

int hz;

### DESCRIPTION

hz specifies the number of times the hardclock(9) timer ticks per second. hz is hardware-dependent; it can be overridden (if the machine dependent code supports this) by defining HZ in the kernel configuration file (see options(4)). Only override the default value if you really know what you are doing.

### SEE ALSO

options(4), callout(9), hardclock(9), microtime(9), time_second(9)