<div dir="auto"><div>Thanks for the heads up.<div dir="auto"><br></div><div dir="auto">Downstream throughput and upstream throughput are measured in indepdent tests, they aren't mixed as the question suggests might be the case. So, latency under downstream load is measured independently from latency under upstream load. The raw data for both is published for the FCC project.</div><div dir="auto"><br></div><div dir="auto">I've not read the paper to understand which one they are using. But I'll take a look tomorrow.</div><div dir="auto"><br></div><div dir="auto">Thanks</div><div dir="auto"><br></div><div dir="auto">Sam</div><br><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Sun, 19 Jun 2022, 20:39 Matt Mathis, <<a href="mailto:matt.mathis@gmail.com">matt.mathis@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">Sam, see the question below about your methodology, from your FCC report.<div><br clear="all"><div><div dir="ltr" data-smartmail="gmail_signature"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div>Thanks,</div><div>--MM--<br>Evil is defined by mortals who think they know "The Truth" and use force to apply it to others. <br>-------------------------------------------<br></div><div><span style="font-size:small">Matt Mathis (</span>Email is best)</div><div><span style="font-size:small">Home & mobile: 412-654-7529</span> please leave a message if you must call.</div><div><br></div></div></div></div></div></div></div></div></div><br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Sun, Jun 19, 2022 at 8:46 AM Sebastian Moeller via Rpm <<a href="mailto:rpm@lists.bufferbloat.net" target="_blank" rel="noreferrer">rpm@lists.bufferbloat.net</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">Hi Dave,<br>
<br>
> On Jun 19, 2022, at 17:32, Dave Taht via Bloat <<a href="mailto:bloat@lists.bufferbloat.net" target="_blank" rel="noreferrer">bloat@lists.bufferbloat.net</a>> wrote:<br>
> <br>
> It's not clear if they are only measuring downloads in fig 4. ?<br>
> <br>
> <a href="https://vaibhavbajpai.com/documents/papers/proceedings/fcc-networking-2022.pdf" rel="noreferrer noreferrer" target="_blank">https://vaibhavbajpai.com/documents/papers/proceedings/fcc-networking-2022.pdf</a><br>
<br>
indeed:<br>
<br>
"The SamKnows probes measure a variety of broadband met- rics [22] over IPv4. The tests [22] covered in this paper include: multi-threaded download speed, UDP latency, UDP latency un- der load, and UDP packet loss. The tests connect to the closest measurement servers (based on round-trip time); measurement servers are hosted both off-net (outside of ISP boundary) and on-net (within ISP boundary). The off-net measurement points were hosted by Measurement Lab (M-Lab) [23] and changed to Level 3 Communications (CenturyLink) across ten cities in the US, while the on-net measurement targets are hosted by the ISPs themselves. The FCC publishes the raw data for each month [24], along with annual reports on major findings [25]. For controllability reasons, the annual MBA reports only cover measurements to the off-net locations, i.e., latency results might be inflated due to geographical distance. Thus, we also consider the on-net measurements in our analysis."<br>
<br>
reference 22 points to <a href="https://www.fcc.gov/general/measuring-broadband-america-open-methodology" rel="noreferrer noreferrer" target="_blank">https://www.fcc.gov/general/measuring-broadband-america-open-methodology</a><br>
"Latency under load Average round trip time for a series of regularly spaced UDP packets sent during downstream/upstream sustained tests"<br>
<br>
this seems to imply that it would be mixed upload/download saturation?<br>
<br>
<br>
But I agree that this is unclear... maybe Sam (Crawford) knows (pun intended), I do not have his email, but maybe he is on-list or someone else can relay that question?<br>
<br>
Regards<br>
Sebastian<br>
<br>
<br>
> <br>
> <br>
> -- <br>
> FQ World Domination pending: <a href="https://blog.cerowrt.org/post/state_of_fq_codel/" rel="noreferrer noreferrer" target="_blank">https://blog.cerowrt.org/post/state_of_fq_codel/</a><br>
> Dave Täht CEO, TekLibre, LLC<br>
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