On Thu, Jul 24, 2014 at 07:36:06AM +0000, Koehrer Mathias (ETAS/ESW5) wrote: > What speaks against using CLOCK_REALTIME for the real time application? > Are there any drawbacks? The only drawback is that, in general, someone else might set the time. This can happen in three ways. 1. local root user calls settime 2. system boots with large time offset, then learns the correct time using NTP or PTP, then resets the local clock to match. 3. when using NTP or PTP, the remote root user calls settime > With our application I can ensure that no manually set of the time occurs. You also will want to make sure that the application does not start until case #2 has occurred. Both NTP and PTP provide ways to find out the synchronization state. So, if you can control the networked run time environments, then there is no drawback to using CLOCK_REALTIME. Thanks, Richard -- To unsubscribe from this list: send the line "unsubscribe linux-rt-users" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
