Hal Murray wrote:
>
> The 10/100/1000 on Ethernet speed refers to net data rate. The actual bit
> rate on the wire is faster to compensate for things like 8B/10B encoding. For
> example, 100 megabit Ethernet is actually 125 on the wire if you look at it
> with a scope.
The symbol rate for gigab
From: Hal Murray
Your graph says peer delay. Do you have rawstats? The peer level has done
some filtering. It would be interesting to see if the difference is visible
to the eye on a graph.
===
Sorry, I don't have rawstats, but give a bit of time I could en
, 2019 15:41
To: Discussion of precise time and frequency measurement
Cc: hmur...@megapathdsl.net
Subject: Re: [time-nuts] Raspberry Pi 4B Ethernet delay
f...@cattaneo.us said:
> Suppose the average NTP packet is 100 bytes, and assume standard 8-10
> encoding no with extra overhead, so 1
f...@cattaneo.us said:
> Suppose the average NTP packet is 100 bytes, and assume standard 8-10
> encoding no with extra overhead, so 1 byte = 10 bits:
The 10/100/1000 on Ethernet speed refers to net data rate. The actual bit
rate on the wire is faster to compensate for things like 8B/10B enco
-frequency offering with RDMA hardware. All the numbers I have
quoted from my own measurements are publicly available.
-Original Message-
From: time-nuts On Behalf Of Achim Gratz
Sent: Friday, 8 November, 2019 09:44
To: time-nuts@lists.febo.com
Subject: Re: [time-nuts] Raspberry Pi 4B Ethernet de
From: Fiorenzo Cattaneo
Interesting thanks. I was wondering if it's worth for me to upgrade to RPI
4 Have you also managed to measure the connection jitter as well?
I've added a graph of the delay to that page:
https://www.satsignal.eu/ntp/BBB-vs-RPi.html#upd
Interesting thanks. I was wondering if it's worth for me to upgrade to RPI
4 Have you also managed to measure the connection jitter as well?
-Original Message-
From: time-nuts On Behalf Of David J
Taylor via time-nuts
Sent: Friday, 8 November, 2019 01:19
To: Time-nuts mailing list
David J Taylor via time-nuts writes:
> I did some very simple tests to see how the RPi 4B with its better
> Ethernet connection compared with the earlier model B (rather old!).
> My test configuration isn't good, as there are a couple of switches
> between the two RPi cards and the monitoring PC:
>
