How jitter affects the no of steps or speed of the stepper motor

What's the exact error message? (Run linuxcnc from the terminal and copy and paste the error message(s) here.)

Large jitter amounts can cause following errors.
These following errors are velocity dependent.

This can typically be eliminated by adjusting the DPLL
timing.

Also if you get Ethernet timeouts you will get following
errors so depending on you host hardware, you may need to
increase the servo thread period.

There is a workaround for this also if you cannot completely eliminate
Ethernet timeouts

To check timing, run LinuxCNC for a while and then run
this command in a terminal:

halcmd show param *.tmax

These times are in CPU clocks (on x86 hosts)

Thanks PCW. I will try these.. By the way I am using Raspberry pi.. so hopefully will get something better....

I am getting following 2 errors

1) Unexpected realtime delay on task 0 with period 2000000
2) hm2/hm2_7i96s.0:stepgen.00.maxval is too big for current step timings and position-scale. clipping to max possible.