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 722573B2A4 for ; Wed, 29 Apr 2020 20:07:03 -0400 (EDT) Received: by mail-il1-x12f.google.com with SMTP id m5so4240262ilj.10 for ; Wed, 29 Apr 2020 17:07:03 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc:content-transfer-encoding; bh=9z0k3SHwLkwHXU73uH20aFXc41SH4Fw1JDDv7yy9jsw=; b=Pose1gL9ia9+hnWk9f/5K4LSbet1SFGQdxXQL6xqalfcG3FxPgwHS1dWnva5eZuUU6 jmuETem+aOh0EyI++p3vru5zmkCbbJpPAUUoPJUdQS1XztOnTL9+MigRd2gd8ew8h5hl Pll6H6DMzO7ainSSXeMpSLOoGksf1HBZ2LznzI+0Vg7cCKy2ZVB3Mrxr1aaBXGMV2APl f9jrVToAwVB1Qv04mv/VkLt+HMYSk9aXOjJkqJVWRuPCTcqeE72BIb3JE3qbfJhzQJv4 UmcrBTyhvm96EQpPjIsd1j6iI73/u5zzrxB1hd/Z2me7dJlsT04PP7I3ZvcLgdkUbVbI PHfQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc:content-transfer-encoding; bh=9z0k3SHwLkwHXU73uH20aFXc41SH4Fw1JDDv7yy9jsw=; b=rou4HfXEnq7fwtKvUDtV47vCIR+HxKyiXTIU7qZxTZx758Nvkvq78MqarHI9UZqN3z hnLKFfrKcIpp+MzIsOG6C2GWwHWjBp34uw14UNqSpQywXC0A1s2q4AA8k999eu0LzGLK FYEc9kwoMUQ3oRrj50B/VTUHRG0//eHYHtbEhX5DgMg4Y7BY9Pydhtdv88uRvSBYQl+c sgVMORv0Zx85zzAuAuvTNO5jltyuTI2v4x8eAjaKPRhr0UV+khVXe1tkrKnXW7enQlpc DhuoacLfA/kGE0f8GwpLUEQLCcpLuCOHtXXhK83H6lHiaV305eKVInD4uDD4+A2jVVj1 tXgQ== X-Gm-Message-State: AGi0PuYkwkOCMiwB/pl1ipT455OnRHqcGZJ3Y2l9zdQeqMalw3dIHFYF DCesCxGBfk2un44kiirA7OaFr72wP73zL6QMktI= X-Google-Smtp-Source: APiQypLFItFFpColw1VV8cj6oUqSjwGbufWhJLz5GeO+5Z1m6v7YqBaa9Q8VCjLsV+7jsSGp9TJauJvwC7TXpjzXSsg= X-Received: by 2002:a92:dccf:: with SMTP id b15mr922905ilr.246.1588205222704; Wed, 29 Apr 2020 17:07:02 -0700 (PDT) MIME-Version: 1.0 References: In-Reply-To: From: Dave Taht Date: Wed, 29 Apr 2020 17:06:50 -0700 Message-ID: To: Tim Higgins Cc: Make-Wifi-fast Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Subject: Re: [Make-wifi-fast] Uplink vs downlink latency 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, 30 Apr 2020 00:07:03 -0000 throughput and latency are interrelated, whats the throughput? On Wed, Apr 29, 2020 at 2:40 PM Tim Higgins wrote= : > > Hi all, > > I finally have my testbed working the way I want and am starting to run t= ests to see if OFDMA does anything useful. > > This will all be covered in detail in an upcoming SmallNetBuilder article= . But I wanted to sanity check something with this esteemed group. > > The tests are basically the flent rtt_fair_var up and down tests ported t= o the octoScope platform I use for WiFi testing. > The initial work was done on flent, with a lot of hand-holding from Toke.= (Thank you, Toke!) > > Using 4 Intel AX200 STAs on Win10. iperf3 is running traffic using TCP/IP= with unthrottled bandwidth. I've taken Bj=C3=B8rn's idea and have each STA= using a different DSCP priority level, but with TCP/IP traffic, not UDP. I= 'm sticking to using CS0-7 equivalents and confirmed that the iperf3 --dscp= values properly translate to the intended WiFi priority levels. Each STA = has a different priority, either CS0,3,5 or 6 (best effort, excellent effor= t, video and voice). > > Ping is used to measure latency and always runs from AP to STA. Only TCP/= IP traffic direction is reversed between the down and uplink tests. > > One thing that jumps out immediately is that uplink latencies are *much* = lower than downlink, with either OFDMA on or off. Attached are three exampl= es. The CDFs are average latency of the 4 STAs. > > The NETGEAR R7800 is a 4x4 AC Qualcomm-based. I'm using this as a baselin= e product. > > The NETGEAR RAX15 is 2x2 AX Broadcom-based. You can see what I mean when = I say OFDMA doesn't help. > > Does this much difference between up and downlink latency pass the sniff = test? > > =3D=3D=3D > Tim > _______________________________________________ > Make-wifi-fast mailing list > Make-wifi-fast@lists.bufferbloat.net > https://lists.bufferbloat.net/listinfo/make-wifi-fast --=20 Make Music, Not War Dave T=C3=A4ht CTO, TekLibre, LLC http://www.teklibre.com Tel: 1-831-435-0729