Hey Gary,

Got this running:

pi@realtimepi:~ $ ntpq -crv -pn
associd=0 status=0115 leap_none, sync_pps, 1 event, clock_sync,
version="ntpd 4.2.8p12@1.3728-o (1)", processor="armv7l",
system="Linux/4.19.71-rt24-v7l", leap=00, stratum=1, precision=-20,
rootdelay=0.000, rootdisp=1.195, refid=PPS,
reftime=e4753908.36ea5b4a  Wed, Jun 16 2021 19:59:20.214,
clock=e4753915.668e763d  Wed, Jun 16 2021 19:59:33.400, peer=23018, tc=4,
mintc=3, offset=0.298251, frequency=-22.915, sys_jitter=0.149930,
clk_jitter=1.980, clk_wander=0.051

     remote           refid      st t when poll reach   delay   offset  jitter
==============================================================================
o127.127.22.0    .PPS.            0 l   13   16  377    0.000    0.298   0.150
*216.239.35.12   .GOOG.           1 u   36   64  377   61.574   -4.184  24.605

Let me know how it looks, or if there's anything I could improve!

On Mon, Jun 14, 2021 at 1:38 PM Gary E. Miller <gem@rellim.com> wrote:

Yo Ricky!

On Mon, 14 Jun 2021 13:25:26 -0700
Ricky Mok <cskpmok@caida.org> wrote:

> Attached a paper on this topic from my old colleagues.

Not bad.  It skipped the important details of how they configured their
RasPi's.  It also made the very common mistake of over smoothing their
ADEV measurements.  Lacking a few now standard metrics.  Otherwise
sound.

It is possible to do a little better now.

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

            Veritas liberabit vos. -- Quid est veritas?
    "If you can't measure it, you can't improve it." - Lord Kelvin
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