Re: Timestamp test questions on Linux

[Michael Davidsaver via Tech-talk <tech-talk at aps.anl.gov>]

On 3/7/22 00:47, gjzhai--- via Tech-talk wrote:
> Hello！
>
> I installed mrfioc2 2.3.0 on MTCA platform. According to EVR Usage Guide, when I do the timestamp test, there are two problems：
Could you describe your setup in more detail?

Where does the 1Hz (aka. 1 pulse per second) signal to the EVG
originate?  The same GPS receiver as the NTP server in question?

https://github.com/epics-modules/mrfioc2/blob/a8cb48d549b7aae13206cf2d168c6f1cfec2e1c4/evgMrmApp/Db/evgMrm.db#L93

> a. The system is configured with NTP, but the current time provider does not have NTP
>
> [opi@localhost ~]$ ntpstat
> synchronised to NTP server (202.38.64.7) at stratum 3
>     time correct to within 11 ms
>     polling server every 512 s
>
> b. The time interval between the system clock and the EVR time is large.
>
> epics> generalTimeReport(2) Backwards time errors prevented 446106 times. Current Time Providers: "EVR", priority = 50 Current Time is 2022-03-07 16:34:25.575015. "OS Clock", priority = 999 Current Time is 2022-03-07 16:36:55.978638. Event Time Providers: "EVR", priority = 50
>
>
> Thank you for your time. I am looking forward to your reply.