From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-il1-x132.google.com (mail-il1-x132.google.com [IPv6:2607:f8b0:4864:20::132]) (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 4D1A93B29E for ; Sun, 17 May 2020 14:57:49 -0400 (EDT) Received: by mail-il1-x132.google.com with SMTP id j3so7724120ilk.11 for ; Sun, 17 May 2020 11:57:49 -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=yFSuOVWNnZfZYdNUxGaUWAn7d58Z2bED+pz+NgHQbeg=; b=bcJOVrR0M2VFXPWc9o3zf0eoYtSAPhTYSlYbUunwbqsqpU/KwuZx45SKvC9/8H5/m6 eYdm/DC3YTqFE1YpXKAnHAsmZ027E7RzBJrjf0VD0rUg6g2VuO0Mqyh/lhqYhik9qEWG PqawmW08oYChwgqeaCQ2gaTxE72D7b7C6jaizwyXX9RcbGY2E2Y5/LSZzj0tRxSlgqui GzEeNqZRafambG2LySOS0ccrTu8y7fHhRAyv7KIvhaKEqIqgq7RhBn9y8vsArUOmDYSE zLgepmFRqpZ2cv8raa+fu7iKEy5UHXYDKfjYMy7hUwWiY4rkTkqbcnwwf5Ebqs3kECLZ /HCA== 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=yFSuOVWNnZfZYdNUxGaUWAn7d58Z2bED+pz+NgHQbeg=; b=byqqAS/RQwBOqwtUcflDw94wqvJYb4jdz5tlRS9TCSMA1ebVzqd3A9wKmXPJtUlAdo GT/31YV0kQaykFX91jGS2a0KlhxzFoFCTct267GRu+uskt0TgC9KE3aqQv51dG8QpmzE 1iaKF5BodGaILzQxCsXY3olW8vXbr24ixqEhm0w2iUdPl8ULAeHP19IqCblOTChOvsom vbDjednnDTq1BNgBUXpvxKr/StAY4VpyPIgyNIOzMAk3TDOGV0Pn8vIH1IyHzKSqNhgC jWNn0QkrabfpmQT8tzvC3ErZpEGPzDYpPe5MiFDbtBIIWbFtalCEWtkA2YMgfyWwjPkD 02XQ== X-Gm-Message-State: AOAM533vGV/VVRFCBcyIH3erjg3FVU2mDYGNM7Bmcj9dIJDBtp3cpfhQ T3XCqx8APa7n7Qfs9BkMXwreR0OsJDJaboEOajk= X-Google-Smtp-Source: ABdhPJwlFf1ypC76V9UayBwQqZvwSCicuEz1wzyvAnQxMx/DZksrkiAqK1C9B7t1xJOKjDzT0P/rH8THKYAcJv7DsuQ= X-Received: by 2002:a92:3c99:: with SMTP id j25mr12845002ilf.249.1589741868764; Sun, 17 May 2020 11:57:48 -0700 (PDT) MIME-Version: 1.0 References: <1ce5f16e-5b39-6aa0-a29b-cdd93a268d72@smallnetbuilder.com> <47a1272a-e2a6-eab0-2987-341e4a7d5c75@smallnetbuilder.com> In-Reply-To: <47a1272a-e2a6-eab0-2987-341e4a7d5c75@smallnetbuilder.com> From: Dave Taht Date: Sun, 17 May 2020 11:57:37 -0700 Message-ID: To: Tim Higgins Cc: Make-Wifi-fast , Felix Fietkau , John Crispin Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Subject: Re: [Make-wifi-fast] Real router latency comparison 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: Sun, 17 May 2020 18:57:49 -0000 Tim: well, can you run the test with the _be test, not mixed dscps, also? Also are you getting actual latency differences from using each dscp? or summing it? A lot of vendors don't differentiate at all. individual stream plots out of this data would show this, no difference in latency, across mixed dscps. in that case, one vendor actually following the 802.11e spec, and others not, hmmm. But: I've always recommended openwrt turn off 802.11e differentiation on the AP, and this is why. It is VASTLY better to optimumize for 802.11n aggregation than 802.11e. on the AP. Clients, sure, try it.... I know/knew exactly what the two things wrong here, but never got around to fixing it, as in practice dscps are hardly used at all. 1) we use up a txop in all the queues rather than just 1 at a time. 2) the codel algorithm has some weird code in it the mucks with the target when it shouldn't and we use a too large target for 5ghz. Still not bad for a 2x ap against bigger fatter tech that I personally have never seen. THX FOR THE TEST!!! On Sun, May 17, 2020 at 11:47 AM Tim Higgins wrot= e: > > Hi all, > > Attached are previews of results I'll be publishing in the Part 2 article= . > > The same test was run on four routers: > - NETGEAR R7800 (Qualcomm 4 stream AC) > - Evenroute IQrouter v3 (Mediatek 2 stream AC, Wifi stack is "vanilla"Ope= nWRT for the MT76" according to Evenroute) > - NETGEAR RAX120 (Qualcomm four stream AX) - OFDMA enabled > - NETGEAR RAX45 (Broadcom four stream AX) - OFDMA enabled > > AP set to Channel 36, 80 MHz bandwidth, WPA2 PSK connection > > Each STA shows 867 Mbps link rate. Signal level ~ -45 dBm. > > iperf3 TCP/IP traffic run simultaneously to all four STAs (Intel AX200, W= in 10, 21.80.2.1 driver) > bitrate (-b): 50Mbps > length (-l): 256 Bytes > DSCP values (--dscp), one per STA: 0 (CS0), 96 (CS3), 160 (CS5), 192 (CS6= ) > > 200ms interval ping run concurrently from AP to STA on each pair. Ping is= always AP to STA for both uplink and downlink traffic. > > Congestion was measured using a Qualcomm AX STA associated to the AP, run= ning 1bps of traffic so that stats could be recorded. > > Thoughts? > > =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D > Tim > _______________________________________________ > Make-wifi-fast mailing list > Make-wifi-fast@lists.bufferbloat.net > https://lists.bufferbloat.net/listinfo/make-wifi-fast -- "For a successful technology, reality must take precedence over public relations, for Mother Nature cannot be fooled" - Richard Feynman dave@taht.net CTO, TekLibre, LLC Tel: 1-831-435-0729