From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-io1-xd2b.google.com (mail-io1-xd2b.google.com [IPv6:2607:f8b0:4864:20::d2b]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by lists.bufferbloat.net (Postfix) with ESMTPS id 41E2C3B29D for ; Wed, 16 Jun 2021 23:04:16 -0400 (EDT) Received: by mail-io1-xd2b.google.com with SMTP id w4so86428ior.1 for ; Wed, 16 Jun 2021 20:04:16 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=nathan.io; s=google; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=mNwh4KGwp4Z6RmQw9LvS/Qlg3ovhiqN6CCucEdRFrIo=; b=09O/ndpOGO/gu5iRfYA9MFXbwbsWDGWs60CowIy8ElZFe8H1/uGF5+RAJQcjmj42hE pzpNhHkmo1uRSuvJaWHIYLKml7/IgR08W14p5MSmryI1RfkGSNk4AOlXzlHAzbBDBMsc 9k5X7FvrkKk1L+4nLLHdDbEmLCnBRuyBc2yu8kCgvCCDZ1WfXG1CLub+08rhi1Bv3RZg g7xw7oxQnmW1el6hoQeA9XRI1pv+xfKtBJrTDHkpl/KzBQFHuoY9Qo+9zUswyjLW+U0E AOa5n8YZE3sLSu8jgd8gPd3xLYBYBJyx7bc+0hEFI8/yyT9ronV5pZnZs4y5XZSqts6o d1zA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=mNwh4KGwp4Z6RmQw9LvS/Qlg3ovhiqN6CCucEdRFrIo=; b=WFf89s9m++X4F426akJQg35aYG/XqW5aXnV0UykPY0GA0JKTkDIQBevcBGVRYQmk6l 6vGiI5ihiG+/T/reIrDieRXgJM5ubylE6G+ZQ7nvXpK05/wb/S43HBZYS+FjH9nPAKfx ZTmHlilEEM+cEGx/1xJm/Od+dHPmTI1BIRqf7Z1CFY64t1wbs2vrTg2T3H/F3yYgHGgW 1de4ii0ModwEjkksboi2quGMgY/IsinIRAww3htSIv2aDseQF6qqa38V8CoOSst5+QT/ YPPSInkccq9E4BeZs8lG5GnuLSa70zMSnTrwWKLtFj44T5i2KvenaH9FZUKyUOijqxqI zLZg== X-Gm-Message-State: AOAM532iiRAUOZsskwENI1QHLigh2qcq5KuLR2gzbtDiDjEzXnpOOki1 y23liZ+DV7DjckFrOJTh5t7kNW6WMdRLabVHGWeWjg== X-Google-Smtp-Source: ABdhPJzFbMmJGBRiNPpdaWSJbZfGLRcrli04iekx2t+HCttj2gFQUupmO2RTlTp1R65Vne1bCsJpTlQUXULAJkN6Y4Q= X-Received: by 2002:a02:8521:: with SMTP id g30mr2312901jai.113.1623899055405; Wed, 16 Jun 2021 20:04:15 -0700 (PDT) MIME-Version: 1.0 References: <20210614120705.31634f9a@spidey.rellim.com> <20210614131831.6a18b0ec@spidey.rellim.com> <20210614133804.11bf0f0b@spidey.rellim.com> In-Reply-To: From: Nathan Owens Date: Wed, 16 Jun 2021 20:04:04 -0700 Message-ID: To: "Gary E. Miller" Cc: starlink@lists.bufferbloat.net Content-Type: multipart/alternative; boundary="000000000000594f7f05c4ed7669" Subject: Re: [Starlink] GPS Dongle? X-BeenThere: starlink@lists.bufferbloat.net X-Mailman-Version: 2.1.20 Precedence: list List-Id: "Starlink has bufferbloat. Bad." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 17 Jun 2021 03:04:16 -0000 --000000000000594f7f05c4ed7669 Content-Type: text/plain; charset="UTF-8" I should note this is very fresh and the jitter is dropping. remote refid st t when poll reach delay offset jitter ============================================================================== o127.127.22.0 .PPS. 0 l 5 16 377 0.000 0.285 0.014 On Wed, Jun 16, 2021 at 8:00 PM Nathan Owens wrote: > 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 wrote: > >> Yo Ricky! >> >> On Mon, 14 Jun 2021 13:25:26 -0700 >> Ricky Mok 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 >> _______________________________________________ >> Starlink mailing list >> Starlink@lists.bufferbloat.net >> https://lists.bufferbloat.net/listinfo/starlink >> > --000000000000594f7f05c4ed7669 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
I should note this is very fresh and the jitter is droppin= g.

=C2=A0 =C2=A0=C2=A0 remote =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 re= fid =C2=A0 =C2=A0 =C2=A0st t when poll reach =C2=A0 delay =C2=A0 offset =C2= =A0jitter
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D
o127.127.22.0 =C2=A0 =C2=A0.PPS. =C2=A0 =C2=A0 = =C2=A0 =C2=A0 =C2=A0 =C2=A00 l =C2=A0 =C2=A05 =C2=A0 16 =C2=A0377 =C2=A0 = =C2=A00.000 =C2=A0 =C2=A00.285 =C2=A0 0.014

On Wed, Jun 16, 2021 at 8:00 PM = Nathan Owens <nathan@nathan.io&g= t; wrote:
Hey Gary,

Got this running:

pi@realtimepi:~ $ ntpq -crv -pn
associd=3D0 stat= us=3D0115 leap_none, sync_pps, 1 event, clock_sync,
version=3D"ntpd= 4.2.8p12@1.3728-o (1)", processor=3D"armv7l",
system=3D&= quot;Linux/4.19.71-rt24-v7l", leap=3D00, stratum=3D1, precision=3D-20,=
rootdelay=3D0.000, rootdisp=3D1.195, refid=3DPPS,
reftime=3De4753908= .36ea5b4a =C2=A0Wed, Jun 16 2021 19:59:20.214,
clock=3De4753915.668e763d= =C2=A0Wed, Jun 16 2021 19:59:33.400, peer=3D23018, tc=3D4,
mintc=3D3, o= ffset=3D0.298251, frequency=3D-22.915, sys_jitter=3D0.149930,
clk_jitter= =3D1.980, clk_wander=3D0.051

=C2=A0 =C2=A0 =C2=A0remote =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 refid =C2=A0 =C2=A0 =C2=A0st t when poll reach =C2= =A0 delay =C2=A0 offset =C2=A0jitter
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
o127.127.22.0 =C2=A0= =C2=A0.PPS. =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A00 l =C2=A0 13 =C2=A0 = 16 =C2=A0377 =C2=A0 =C2=A00.000 =C2=A0 =C2=A00.298 =C2=A0 0.150
*216.239= .35.12 =C2=A0 .GOOG. =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 1 u =C2=A0 36 =C2= =A0 64 =C2=A0377 =C2=A0 61.574 =C2=A0 -4.184 =C2=A024.605

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 <cskpmo= k@caida.org> wrote:

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

Not bad.=C2=A0 It skipped the important details of how they configured thei= r
RasPi's.=C2=A0 It also made the very common mistake of over smoothing t= heir
ADEV measurements.=C2=A0 Lacking a few now standard metrics.=C2=A0 Otherwis= e
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
=C2=A0 =C2=A0 =C2=A0 =C2=A0 gem@rellim.com=C2=A0 Tel:+1 541 382 8588

=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 Veritas liberabit vos. -- Quid es= t veritas?
=C2=A0 =C2=A0 "If you can't measure it, you can't improve it.&= quot; - Lord Kelvin
_______________________________________________
Starlink mailing list
Starlin= k@lists.bufferbloat.net
https://lists.bufferbloat.net/listinfo/starlink
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