From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-oi0-x229.google.com (mail-oi0-x229.google.com [IPv6:2607:f8b0:4003:c06::229]) (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 BFC863BA8E for ; Mon, 2 Jul 2018 16:12:26 -0400 (EDT) Received: by mail-oi0-x229.google.com with SMTP id m2-v6so10805611oim.12 for ; Mon, 02 Jul 2018 13:12:26 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:sender:in-reply-to:references:from:date:message-id :subject:to:cc:content-transfer-encoding; bh=aOu1Wh5t+ksyQUvw5nl9NM6lqdjMU+7KJ/6YBXr7g0M=; b=LsIiPb3UjvIBRBAwyEvDk6YGWD1o3ycrZcnEJZgvrmy0l7sbONE7r2FBBeQROXPozj FX8TuCDgA5vZufssfZ2w4j17FkrXph2dKXvW0t88c6FgO+kiRUXAgj1ccJ6Df0UKbJfm M/IpA4AsAWPMzI1DRNC8MxNypCZNCdNpEgKvXimWM2dWmv5KDhZtG7FawX/QR07U1L4H r/HLRtNNMSHbEfI0cEhkzaCqLnJykEDdMFISccbQnxhByRrCRP90SHw0FmlKkmeOprF7 fUcahxvjSkEVZ0Ypzuc/C7eAuiKLEqEovZNoKqONQLiQMZoabkUDe1yo8TFDkCPL/BNJ CUyw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:sender:in-reply-to:references:from :date:message-id:subject:to:cc:content-transfer-encoding; bh=aOu1Wh5t+ksyQUvw5nl9NM6lqdjMU+7KJ/6YBXr7g0M=; b=um2ebR72sk8cttW+WsFz6cxSjZNMc6Qv2uEKUzpJDBYeYKNwOPqY5RQ9j6DjJ4HBmn LKYfi+A7I8kwHRF8Qj/X5OA3rtrarpByLwvvppKXH+EXTSLszF/CcC/o0GGYUst3Jdxh mO5cQhQA7jMe3begodkbk2Q6i3UA1wyFuDZeFuSaRuuC83RaRsXgZQZMsed2+yxxdkvt PKOvEZLA58cCOfrvc7UfOdcZoY2tjQD/aN4zoc9ZEHFUk+gjMeUbkRGQD85J8EFVVkOG wgnEZ/V8PyxXkeJAGUlk8daxLUlFTsIp0yFqt8P0fMrsTJ8UqL4wd/plEvLTTlGiPZI0 k/2w== X-Gm-Message-State: APt69E0gA+LbAoV4j/LQJAq3EbHmSyS/tDWKsWoBuH4EvRcOc1wzl8f+ gXDXm67mZpNnUs1HwwzZTD90A15sjBVGwK+drBY= X-Google-Smtp-Source: AAOMgpcoxU/kVD+ARnFf9U17yeL8ei4/E+dmN/V2/d7J6bhjvVwlHgToAn0riUs7gTzCiRcJBVuHH8lCOPG0vcwFN2M= X-Received: by 2002:aca:3c02:: with SMTP id j2-v6mr18461933oia.238.1530562345973; Mon, 02 Jul 2018 13:12:25 -0700 (PDT) MIME-Version: 1.0 Sender: bkil.hu@gmail.com Received: by 2002:a9d:1d28:0:0:0:0:0 with HTTP; Mon, 2 Jul 2018 13:12:05 -0700 (PDT) In-Reply-To: References: From: bkil Date: Mon, 2 Jul 2018 22:12:05 +0200 X-Google-Sender-Auth: ugLa67OTdN2s4HMuI_bsg3WbVpM Message-ID: To: Dave Taht Cc: Make-Wifi-fast Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Subject: Re: [Make-wifi-fast] tcp_pacing_rate_shift and smaller txops 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: Mon, 02 Jul 2018 20:12:26 -0000 Interesting observation. Do you think the new wmm rules could prevent fine tuning of these constants later on? https://git.kernel.org/pub/scm/linux/kernel/git/sforshee/wireless-regdb.git= /commit/?id=3Dfde57be08890095132b9f7d28aaaf9a026b2e608 On Mon, Jul 2, 2018 at 9:44 PM, Dave Taht wrote: > wifi APs have the ability to advertise in the beacon, the actual > maximum time of a txop for clients, and 802.11n, for example, cannot > queue an aggregate in the VO queue. the otherwise lovely > tcp_pacing_rate shift thing sets this to a fixed 4ms, when perhaps it > could leverage the actual setting for the queue in question, at least, > as defined by the beacon or 802.11e standard. > > I've long thought that perhaps a gaming wifi router would advertise > smaller txops, and for all I know, some do. > > this is currently controlled by cwmin and cwmax parameters in hostapd > > # Best effort > #tx_queue_data2_aifs=3D3 > #tx_queue_data2_cwmin=3D15 > #tx_queue_data2_cwmax=3D63 > #tx_queue_data2_burst=3D0 > > I did a lot of fiddling with this (lowering it to 1,1.5,2ms,3ms,4ms) > at one point (that I cannot currently find). It hurt bandwidth but > helped latency, a lot, and this was from before we shipped fq_codel > for wifi. > > -- > > Dave T=C3=A4ht > CEO, TekLibre, LLC > http://www.teklibre.com > Tel: 1-669-226-2619 > _______________________________________________ > Make-wifi-fast mailing list > Make-wifi-fast@lists.bufferbloat.net > https://lists.bufferbloat.net/listinfo/make-wifi-fast