CODEWITHSUNDEEP
linuxnetwork-programminglanguage-agnosticsynchronizationclock
Alba Mendez
Alba Mendez

Reputation: 4635

Synchronized calls across different computers

I have three Linux boxes, each running my program.

The program needs to call a certain callback at regular intervals, and each call must happen at the exact same time across the three boxes. I don't need any other synchronization except for the calls.

If it helps, the three boxes have their clocks synchronized by NTP (one of the boxes is the master).

Is there a way to accomplish this with good precision? Preferably non Linux specific. To make things simple, the callback must be called each N ms even if a previous call hasn't completed yet.

Upvotes: 0

Views: 33

Answers (1)

xnor
xnor

Reputation: 353

How about you send a request to execute the function far enough ahead of time including a timestamp when the function should be executed? The receiving application would sleep/wait the remaining time (some time is lost due to latency), then execute the function at the precise timestamp you requested.

If the called function itself takes longer than your interval, you should probably consider using threads. If the function executes quickly but transfer of the results takes longer then you should get away with something like select() without additional threads.

Upvotes: 1

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