[Freeswitch-dev] Epoch current time difference

[Glaucio Vaz de Mello]

Yes, that's right. I had ntp enabled.
With ntp disabled the problem disappear, FS clock is exactly the same as
system clock.

Thanks.



On Fri, Sep 9, 2011 at 5:19 PM, Anthony Minessale <
anthony.minessale at gmail.com> wrote:

> Most likely you are using something like ntp to sync your system
> clock, if so you should also sync the FS clock when you change the ntp
> time.
>
> FS is keeping it's own time using the monotonic clock in the kernel
> which is the same mechanism as the system time so your machine
> probably keeps bad time.
>
>
> On Fri, Sep 9, 2011 at 8:27 AM, Glaucio Vaz de Mello <gvmello at yx.cl>
> wrote:
> > Hi,
> >
> > Thanks for the answer.
> > I made several tests and came to the conclusion that FreeSWITCH clock is
> > always avanced compared to system time. The difference is about 9 seconds
> > per day, just letting FreeSWITCH running, without touching the system
> clock.
> > Effectively I can sync with system time with "fsctl sync_clock", then the
> > difference comes to zero and start counting again.
> >
> > This can be an issue for billing long duration calls, since the
> registered
> > call duration will be some seconds more than it really was.
> > If someone need more information, logs or reporting this issue as a bug,
> > just let me know.
> >
> >
> > regards,
> > Glaucio
> >
> >
> >
> > On Tue, Sep 6, 2011 at 1:57 AM, lakshmanan ganapathy <
> lakindia89 at gmail.com>
> > wrote:
> >>
> >> As for as I know, FreeSWITCH maintains its own clock. When you start
> >> freeswitch for the first time, it takes the system time and from there
> on,
> >> it uses its own clock to update the time. So After starting freeswitch,
> if
> >> you change the system time, then freeswitch time and system time will be
> >> different.
> >>
> >> You can sync the system time by using "fsctl sync_clock". Check whether
> >> the 9 seconds it due to this behaviour....
> >>
> >>
> >> On Wed, Aug 31, 2011 at 7:26 PM, Glaucio Vaz de Mello <gvmello at yx.cl>
> >> wrote:
> >>>
> >>> Hello,
> >>>
> >>>    I noticed a difference between FreeSWITCH time and system clock
> time.
> >>>    Is this a standard behaviour? or something is wrong in my system?
> >>>
> >>> More details of the issue:
> >>>    Inside FreeSWITCH I look for current epoch time using this function:
> >>> time_t now = switch_epoch_time_now(NULL);
> >>>
> >>>    Then I look for system clock current time using:
> >>> #include <time.h>
> >>> time_t now = time(NULL);
> >>>
> >>>    Between both results I noticed a difference of 9 seconds.
> >>>
> >>>
> >>> This can also be viewed using Unix commands.
> >>>
> >>> Unix date command from console:
> >>> # date +%s
> >>> 1314741992
> >>>
> >>> Then, I start a call and make a DB query:
> >>> # sqlite3 /var/freeswitch/db/core.db "SELECT call_created_epoch FROM
> >>> calls;"
> >>> 1314742000
> >>>
> >>> Then I repeat unix date command:
> >>> # date +%s
> >>> 1314741994
> >>>
> >>> Any comments are welcome.
> >>> Regards,
> >>> Glaucio
> >>>
> >>> _______________________________________________
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> >>>
> >>
> >>
> >> _______________________________________________
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> >>
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> >
> >
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> >
> >
>
>
>
> --
> Anthony Minessale II
>
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