From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-il1-x12f.google.com (mail-il1-x12f.google.com [IPv6:2607:f8b0:4864:20::12f]) (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 3B4993B29E for ; Wed, 19 Jul 2023 21:55:03 -0400 (EDT) Received: by mail-il1-x12f.google.com with SMTP id e9e14a558f8ab-3457a3ada84so1935895ab.1 for ; Wed, 19 Jul 2023 18:55:03 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20221208; t=1689818102; x=1690422902; h=content-transfer-encoding:cc:to:subject:message-id:date:from :in-reply-to:references:mime-version:from:to:cc:subject:date :message-id:reply-to; bh=BrIOx+STRkem/fZoraQCNlQTUTR5RpYthpKVWPxDlT0=; b=XL0AgrVnJIknPzUV5JqUe2NdgynO3Y1WqBxODOB1QEuQ2qYyiSCuhlxhgQWKlhY+zq hOg5s8zLaOQwDkGfNFZWDFogMjnST6u6452zN5Q9o3dQKi+C321yCAFYoHZxSXY1L0M4 Pi75xz80scwhnUyi/i36g3Runtht3r/cuTLhj5MkkO9oY86jPvVrFi2Nb7ZkuGucFzJU RA2nTSHCUy63MFfGXXB9Dg3r4RbMrP5X+vWnZPWRSD0dsyhGc5QqLKeDkn+uyA0pMBeB d7/SlNr3Ynisyqtf7ONYtTZVF1mvkeaFK9MzIVpjCrFgeU9or70r6Cyw/cSilHgSi9hX q8lg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1689818102; x=1690422902; h=content-transfer-encoding:cc:to:subject:message-id:date:from :in-reply-to:references:mime-version:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=BrIOx+STRkem/fZoraQCNlQTUTR5RpYthpKVWPxDlT0=; b=B6wV0jTMJeYZ4ppbYiz8IWQrCOWtN42dKhAb+VyR4kDoOSDICtXRLDGjOzR9IW7RkX mo8z4Ian9C87v0jJBnUTYMG52SWdYAJkPR5Yy4/KNydtbRwhAqgAxKTym4cdvwcP0Mp5 slqfND6KJLQjvWhcwQlgT15UkzeW/xrWsoVUjWpp5CDYlbw45iBw2Um9wceEXMl2eMb9 LWRJ5MPaWTBG4IbmwM8QH0tn/LrzZspRZQVfFQFn5W24+DKCRWFYp57I6w4w4cbD1bIj 3hEv/fKN5mB7t4/fOsXzWetjyvTMcuV6YmHSziOc3FEBnLbeudHRmwGGCsMn1Q4ybAmL zlew== X-Gm-Message-State: ABy/qLYoLa/vPT3TGD0Fyrzz+esAHqfIVRuQJ/Kgg4PchhmKZyhFQETI kCUHuYw9VJHNFabx1O7ymCGJOkW/mwNuylguqJQ= X-Google-Smtp-Source: APBJJlGKCshP58KbmcyH1EvdEGc1zaQQ1RLIxk5GuZ/JweAv6NOCVi37S3miX//N0ZqCjleWUnBaZtdUmSsX6t8+MYo= X-Received: by 2002:a05:6e02:168d:b0:347:6ff0:bf09 with SMTP id f13-20020a056e02168d00b003476ff0bf09mr7546411ila.32.1689818102399; Wed, 19 Jul 2023 18:55:02 -0700 (PDT) MIME-Version: 1.0 References: In-Reply-To: From: Dave Taht Date: Wed, 19 Jul 2023 19:54:50 -0600 Message-ID: To: Bob McMahon Cc: Make-Wifi-fast , hiendtt@uit.edu.vn, s.aoyagi@chiba-u.jp, sekiya@faculty.chiba-u.jp, yuuki-ho@chiba-u.jp, Kien NGUYEN , duyld@uit.edu.vn, thanhnd@uit.edu.vn Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Subject: Re: [Make-wifi-fast] An "Accurate" Platform for Investigating TCP Performance in Wi-Fi Networks X-BeenThere: make-wifi-fast@lists.bufferbloat.net X-Mailman-Version: 2.1.20 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 20 Jul 2023 01:55:03 -0000 On Wed, Jul 19, 2023 at 6:48=E2=80=AFPM Bob McMahon wrote: > > I think making WiFi tech accessible to students is a very good thing. Tha= t students make mistakes is also a good thing. https://github.com/open-sdr/openwifi is making half decent progress. >I understand the frustration though. I had opened that paper hoping for something more. > > I've recently rolled out a raspberry pi 4 crib sheet on how to build an L= 4S capable device. It's a fun project and comes in at around $100 U.S. Thr= ow in some switches, USB WiFi cards, ethernet for control, a GPS hat for pu= lse per second, use iperf 2 and pyflows. All for less than $500. > > The expensive part is placing the RF under control but that's doable too = - though likely in the few thousands of dollars and maybe just a bit more. = The math is already done thanks to those studying molecular evolution. That FPGA above looks promising. > > Bob > > On Wed, Jul 19, 2023 at 5:30=E2=80=AFPM Dave Taht via Make-wifi-fast wrote: >> >> It is hard to contain my disappointment that a modern work on wifi, >> that even mentions bufferbloat, could have missed our work on fixing >> wifi (such as "ending the anomaly", now the default APIs in the linux >> kernel), and make claims for the emulator that are so completely >> wrong, and further claim that the behaviors matched a real world AP. >> >> re: https://mdpi-res.com/d_attachment/futureinternet/futureinternet-15-0= 0246/article_deploy/futureinternet-15-00246.pdf?version=3D1689771540 >> >> Can I suggest strongly to the authors that they try to understand rate >> vs range vs buffering, the intersection of the half duplex txop >> infrastructure with multiple stations, the side effects of >> aggregation, and other scheduling difficulties mininet does not come >> even close to handling? >> >> 20 packet buffers?? A more typical number is much greater. >> Test through walls or at distance? >> >> Here are 4 resources that might help deepen your understanding. >> >> https://www.youtube.com/watch?v=3DRb-UnHDw02o&t=3D1532s (10 minutes here= , >> but do the whole thing) >> https://bufferbloat-and-beyond.net/ >> https://www.cs.kau.se/tohojo/airtime-fairness/ >> https://blog.cerowrt.org/post/minstrel/ >> >> -- >> Podcast: https://www.linkedin.com/feed/update/urn:li:activity:7058793910= 227111937/ >> Dave T=C3=A4ht CSO, LibreQos >> _______________________________________________ >> Make-wifi-fast mailing list >> Make-wifi-fast@lists.bufferbloat.net >> https://lists.bufferbloat.net/listinfo/make-wifi-fast > > > This electronic communication and the information and any files transmitt= ed with it, or attached to it, are confidential and are intended solely for= the use of the individual or entity to whom it is addressed and may contai= n information that is confidential, legally privileged, protected by privac= y laws, or otherwise restricted from disclosure to anyone else. If you are = not the intended recipient or the person responsible for delivering the e-m= ail to the intended recipient, you are hereby notified that any use, copyin= g, distributing, dissemination, forwarding, printing, or copying of this e-= mail is strictly prohibited. If you received this e-mail in error, please r= eturn the e-mail to the sender, delete it from your computer, and destroy a= ny printed copy of it. --=20 Podcast: https://www.linkedin.com/feed/update/urn:li:activity:7058793910227= 111937/ Dave T=C3=A4ht CSO, LibreQos