NAME

       timedelta - LinuxCNC HAL component that measures thread scheduling timing behavior

SYNOPSIS

       loadrt timedelta [count=N|names=name1[,name2...]]

FUNCTIONS

       timedelta.N

PINS

       timedelta.N.jitter s32 out (default: 0)
              Worst-case scheduling error (in ns).  This is the largest discrepancy between ideal thread period,
              and  actual  time  between sequential runs of this component.  This uses the absolute value of the
              error, so 'got run too early' and 'got run too late' both show up as positive jitter.

       timedelta.N.current-jitter s32 out (default: 0)
              Scheduling error (in ns) of the current invocation.  This is the discrepancy between ideal  thread
              period, and actual time since the previous run of this component.  This uses the absolute value of
              the error, so 'got run too early' and 'got run too late' both show up as positive jitter.

       timedelta.N.current-error s32 out (default: 0)
              Scheduling  error (in ns) of the current invocation.  This is the discrepancy between ideal thread
              period, and actual time since the previous run of this component.  This does not use the  absolute
              value of the error, so 'got run too early' shows up as negative error and 'got run too late' shows
              up as positive error.

       timedelta.N.min s32 out (default: 0)
              Minimum time (in ns) between sequential runs of this component.

       timedelta.N.max s32 out (default: 0)
              Maximum time (in ns) between sequential runs of this component.

       timedelta.N.reset bit in
              Set this pin to True, then back to False, to reset some of the statistics.

       timedelta.N.out s32 out
              Time (in ns) since the previous run of this component.  This should ideally be equal to the thread
              period.

       timedelta.N.err s32 out (default: 0)
              Cumulative time error (in ns).  Probably not useful.

       timedelta.N.avg-err float out (default: 0)
              The average scheduling error (in ns).

AUTHOR

       Jeff Epler

LICENSE

       GPL

LinuxCNC Documentation                             2025-06-19                                       TIMEDELTA(9)