[Freeswitch-users] reverse time skew warning

[Peter Olsson]

It might cause bad audio during a very short time - however, as you say it's a very short time so it shouldn't cause any real problems.

The timer loop will always detect this though, no matter how small the time change was.

The best way is to use a monotonic clock. On Linux this should be default, on Windows it requires a specific startup param, on Mac OS X it's not available at this time. The monotonic clock doesn't change when time changes, so it's always a better choice.

/Peter

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Från: freeswitch-users-bounces at lists.freeswitch.org [freeswitch-users-bounces at lists.freeswitch.org] för Bote Man [bote_radio at botecomm.com]
Skickat: den 18 mars 2012 12:14
Till: 'FreeSWITCH Users Help'
Ämne: [Freeswitch-users] reverse time skew warning

What kind of problems can arise from the FreeSWITCH error message "Reverse time skew!"?

I notice in the system logs that at the time of the FreeSWITCH complaint, ntp adjusted the system time backwards from 1:00:13.982493600Z to 1:00:13.982000000Z which is less than half a millisecond. That sounds negligible to you and mean, but that is an eternity for an android.

I just hope it doesn't cause a serious problem down the road like a segfault or something every time ntp adjusts the time. Any comments?

Thanks.

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