The current time is used to determine event periods in seconds. Comparison is in seconds. Randomize the salt for MD5 password hashing. Check for client expiry times. Calculate the deviation from correct time for a slave machine.
Calculation is in seconds and usec.
Calculate polling time and sample intervals for conversing with slaves. Adjust time for residence in a queue. Check the response time of slaves. Schedule sending of an ack to a slave. Delay sending time to slaves until confident of accuracy.