Clock Interval

Hi

Can someone describe what a Clock Interval is, either on a Windows 2KP/XP or a Windows Server Systems?


Thanks
FallenZer0

When periodic time adjustment is in effect, the system adds an adjusting value to the time-of-day clock at a periodic interval, at each clock interrupt. the mean time between these periodic interval is known as a clock interval. this is crucial for anything from clock cycle synchronization between computers inside a domain, or a windows server scheduling.

When periodic time adjustment is in effect, the system adds an adjusting value to the time-of-day clock at a periodic interval, at each clock interrupt. the mean time between these periodic interval is known as a clock interval. this is crucial for anything from clock cycle synchronization between computers inside a domain, or a windows server scheduling.

-Why would there be a periodic time adjustment?

-Is it the System Time or Is it the Local Time?

-How does the System know what the *adjusting value* is, to add to the time-of-day?

-To adjust time, there has to be a difference in time. So what is the time of the day clock compared against?


Thanks
FallenZer0

hi,
it's periodic because systems don't fall out of sync every moment. as a matter of fact systems don't lose sync for days. this is a failsafe mechanism. it's pointless from a resource point of view, to update time sequence every moment. you do appreciate, that there are better things to do with resources.

there is one head end system which maintains the time sequence, so this sends the sync signals to the rest of the systems. hence each individual system does not need to keep track of sync events. all it has to do it to stay in sync after receiving the clock information. once knowing what the difference is, (and this is not in minutes or even seconds, it's done in terms of a much smaller fraction of a second), the system adds or substracts this amount from it's own time, and keeps on running time dependant events and schedules from that updated time.

this is the system time. as said before, this time is used to schedule various events.