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<p class=MsoPlainText><font size=2 face="Courier New"><span style='font-size:
10.0pt'>HNY to all!<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span style='font-size:
10.0pt'><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span style='font-size:
10.0pt'>Seems to me that we often get distracted by nomenclature needlessly. Perhaps
it’s time to agree on the lexicon that should be used going forward so as
to avoid such distractions.<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span style='font-size:
10.0pt'><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span style='font-size:
10.0pt'>Perhaps a place to start is “the technical facts”:<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span style='font-size:
10.0pt'><o:p> </o:p></span></font></p>
<p class=MsoPlainText style='margin-left:.5in;text-indent:-.25in;mso-list:l0 level1 lfo1'><![if !supportLists]><font
size=2 face="Courier New"><span style='font-size:10.0pt'><span
style='mso-list:Ignore'>1)<font size=1 face="Times New Roman"><span
style='font:7.0pt "Times New Roman"'> </span></font></span></span></font><![endif]>“capacity”
is a property of a link (or links) that specifies the theoretically achievable
maximum error-free transmission rate of data/information through a noisy
channel (or channels, the multidimensiaonl version of the capacity theorem). Yes,
it’s much more complicated than that in general, however the basic
principle is easy to understand. “You can only get so much water through
a hose of size X with an applied pressure of magnitude Y.”)<o:p></o:p></p>
<p class=MsoPlainText style='margin-left:.5in;text-indent:-.25in;mso-list:l0 level1 lfo1'><![if !supportLists]><font
size=2 face="Courier New"><span style='font-size:10.0pt'><span
style='mso-list:Ignore'>2)<font size=1 face="Times New Roman"><span
style='font:7.0pt "Times New Roman"'> </span></font></span></span></font><![endif]>“maximum
achievable throughput/data-rate” of a channel is the maximum rate (always
<= channel capacity) at which information can be exchanged in the channel as
implemented (under all conditions).<o:p></o:p></p>
<p class=MsoPlainText style='margin-left:.5in;text-indent:-.25in;mso-list:l0 level1 lfo1'><![if !supportLists]><font
size=2 face="Courier New"><span style='font-size:10.0pt'><span
style='mso-list:Ignore'>3)<font size=1 face="Times New Roman"><span
style='font:7.0pt "Times New Roman"'> </span></font></span></span></font><![endif]>achieved/measured
“data rate” is the measured/estimated rate of information transmission
(always <= maximum achievable rate” for that channel) in a channel
under a given set of conditions. <o:p></o:p></p>
<p class=MsoPlainText style='margin-left:.5in;text-indent:-.25in;mso-list:l0 level1 lfo1'><![if !supportLists]><font
size=2 face="Courier New"><span style='font-size:10.0pt'><span
style='mso-list:Ignore'>4)<font size=1 face="Times New Roman"><span
style='font:7.0pt "Times New Roman"'> </span></font></span></span></font><![endif]>“latency”
is the amount of time it takes information to get from a source to its
destination (there may be multiple destinations each with different latencies <font
face=Wingdings><span style='font-family:Wingdings'>J</span></font>). Latency
may (or may not) include the unavoidable consequence of the laws of physics
that state information can not travel faster than the “speed” of
light (actually the “speed” in whatever medium and by whatever mode
the information is actually being transported)! Tin cans and strings have a
transmission speed that depends critically on how hard each person at the end
of the “link” are pulling on their cans! <font face=Wingdings><span
style='font-family:Wingdings'>J</span></font> The point is that when included, information
transmission times from source to destination set a lower bound on the “latency”
of that link/channel.<o:p></o:p></p>
<p class=MsoPlainText style='margin-left:.5in;text-indent:-.25in;mso-list:l0 level1 lfo1'><![if !supportLists]><font
size=2 face="Courier New"><span style='font-size:10.0pt'><span
style='mso-list:Ignore'>5)<font size=1 face="Times New Roman"><span
style='font:7.0pt "Times New Roman"'> </span></font></span></span></font><![endif]>…
(feel free to add more <font face=Wingdings><span style='font-family:Wingdings'>J</span></font><o:p></o:p></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span style='font-size:
10.0pt'><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span style='font-size:
10.0pt'>My two cents!<br>
<br>
<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span style='font-size:
10.0pt'>RR<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span style='font-size:
10.0pt'><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span style='font-size:
10.0pt'>-----Original Message-----<br>
From: Starlink [mailto:starlink-bounces@lists.bufferbloat.net] On Behalf Of jf---
via Starlink<br>
Sent: Wednesday, January 4, 2023 11:20 AM<br>
To: Dave Taht<br>
Cc: Dave Taht via Starlink; IETF IPPM WG; libreqos; Cake List; Rpm; bloat<br>
Subject: Re: [Starlink] [Rpm] the grinch meets cloudflare's christmas present</span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span style='font-size:
10.0pt'><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span style='font-size:
10.0pt'>HNY Dave and all the rest,<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span style='font-size:
10.0pt'><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span style='font-size:
10.0pt'>Great to see yet another capacity test add latency metrics to the
results. This one looks like a good start.<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span style='font-size:
10.0pt'><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span style='font-size:
10.0pt'>Results from my Windstream DOCSIS 3.1 line (3.1 on download only, up is
3.0) Gigabit down / 35Mbps up provisioning. Using an IQrouter Pro (an i5 x86)
with Cake set for 710/31 as this ISP can’t deliver reliable low-latency
unless you shave a good bit off the targets. My local loop is pretty congested.<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span style='font-size:
10.0pt'><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span style='font-size:
10.0pt'>Here’s the latest Cloudflare test:<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span style='font-size:
10.0pt'><o:p> </o:p></span></font></p>
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