<div dir="auto">iperf3 isn’t “academic”, but is more focused on scientific computing (ESNet pushes a LOT of data CERN around, on 100Gbps backbones).</div><div dir="auto"><br></div><div dir="auto">But that also skews their usage/needs. Very high throughput bulk transfers with long durations, over mixed systems. Not as many concerns about latency, except in that latency can cause messes with congestion control.</div><div dir="auto"><br></div><div><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Sat, Mar 27, 2021 at 2:45 PM Dave Taht <<a href="mailto:dave.taht@gmail.com">dave.taht@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-style:solid;padding-left:1ex;border-left-color:rgb(204,204,204)">so glad to hear the license has been fixed.<br>
<br>
carl, iperf is only used in a few of flent's tests. We trusted netperf<br>
- as did the linux kernel developers - a lot further than all the<br>
iperf variants combined - at the time we started work on flent.<br>
<br>
I would not mind us somehow developing a drop in replacement for<br>
netperf, perhaps leveraging the irtt codebase, as I have a long<br>
standing desire to be able to reliably measure latencies and the<br>
output of TCP_INFO in "some" tool below 250us.<br>
<br>
iperf has come a long way, but getting to where I could trust the<br>
largely "academic" codebase it was would take a ton of benchmarking.<br>
<br>
On Sat, Mar 27, 2021 at 2:09 PM Klatsky, Carl via Bloat<br>
<<a href="mailto:bloat@lists.bufferbloat.net" target="_blank">bloat@lists.bufferbloat.net</a>> wrote:<br>
><br>
> Toke,<br>
><br>
> How you see this coming into Flent? My understanding is that for latency & load test like RRUL:<br>
><br>
> -iperf provides the bandwidth portion<br>
> -IRTT provides the latency portion, and if IRTT is not found, the test falls back to ICMP for the latency check<br>
><br>
> Would netperf replace iperf for the bandwidth portion? Do you see it being used for the latency portion?<br>
><br>
> Thanks,<br>
> Carl<br>
><br>
> -----Original Message-----<br>
> From: Bloat <<a href="mailto:bloat-bounces@lists.bufferbloat.net" target="_blank">bloat-bounces@lists.bufferbloat.net</a>> On Behalf Of Toke Høiland-Jørgensen via Bloat<br>
> Sent: Friday, March 26, 2021 7:32 PM<br>
> To: bloat <<a href="mailto:bloat@lists.bufferbloat.net" target="_blank">bloat@lists.bufferbloat.net</a>><br>
> Subject: [Bloat] Netperf re-licensed as MIT<br>
><br>
> Hopefully this means we can get it packaged for the distros that have thus far refused to because of the license - i.e., Debian and Fedora!<br>
><br>
> -Toke<br>
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<br>
<br>
-- <br>
"For a successful technology, reality must take precedence over public<br>
relations, for Mother Nature cannot be fooled" - Richard Feynman<br>
<br>
<a href="mailto:dave@taht.net" target="_blank">dave@taht.net</a> <Dave Täht> CTO, TekLibre, LLC Tel: 1-831-435-0729<br>
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</blockquote></div></div>-- <br><div dir="ltr" class="gmail_signature" data-smartmail="gmail_signature">- Sent from my iPhone.</div>