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Re: Clarifications about PPS SHM content


From: Gary E. Miller
Subject: Re: Clarifications about PPS SHM content
Date: Thu, 19 Mar 2020 10:28:01 -0700

Yo Martin!

On Thu, 19 Mar 2020 13:24:53 -0400
Martin Boissonneault <address@hidden> wrote:

> I'm curious as to why NTPd would need to have both the GNSS PPS shm
> and the GNSS serial shm refclocks in the ntp.conf.

It does not.  Mostly a hold over from existing practice in the ntpd
pps driver.  gpsd users do it so they get some time when PPS is dead.

> Wouldn't the PPS
> shm contain enough time information as collated from GPSd?

Yes.  ntpshmmon shows this.

RGDS
GARY
---------------------------------------------------------------------------
Gary E. Miller Rellim 109 NW Wilmington Ave., Suite E, Bend, OR 97703
        address@hidden  Tel:+1 541 382 8588

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    "If you can't measure it, you can't improve it." - Lord Kelvin

Attachment: pgp4jVDKus8s4.pgp
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