From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-qk1-x742.google.com (mail-qk1-x742.google.com [IPv6:2607:f8b0:4864:20::742]) (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 D6B923BA8E for ; Mon, 19 Nov 2018 18:47:17 -0500 (EST) Received: by mail-qk1-x742.google.com with SMTP id q70so120191qkh.6 for ; Mon, 19 Nov 2018 15:47:17 -0800 (PST) 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=tN46XviYnAbD1eX9aBi3MqcZSKzPvBLgD/FsKoh/wb4=; b=dFU5zmGAYH4tTUyMpPMoL933pOXmt9FV1owYwvBcrDUF1wbNJhU9mJB84nhhX4zTjb HcZPgtDmKm29r8s+efgqPGBW/xynfue7Q1Y7PPODg//SzYdOTy8ob9ArvU/ivDsIkhAT Wv8BtA99mfT52I8GPIxvR/0+B4E9pzdc7DVS+qeXV8WGBN/NVo9Cyao09jh6imjQsEoY baCeIPIvEjo/CFaHmQbVdyXbpexd5KrRs8pFbt0ftPkzSEFxw/CYL7iwXmD1qW66CBpx e4+R9FOf4+QJTco04IuElntYMtgQhILYcspbUHYb/XasMXaqUGgxQqI6TZMMRVe9nDRD SN3g== 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=tN46XviYnAbD1eX9aBi3MqcZSKzPvBLgD/FsKoh/wb4=; b=earrWTok07w6IfK1FIShLPBI4CABW1Vm7n29YLJba1ZpQ1yaCR/6T94zV9mHcAYU6W f+jGQAuuGyx+F5PStJrjP9OcJifcJBdm6ty7UCZEwrKu5PFIV4z0Hb5CdhVyU7ND0ipJ FyW3VLYjtuFcoWumGowVVgiAXlq6UwoBammZYyKConGTPuUpzPUzHG4k4L9kPeIvY8Vw 681zVHYzWhAthZjR223ACCfqWo1KKwT431+uAhgVFshgUNGwIu2ic75UM+96n8Tb1gsr uEpz69u2KebhJ/RW08UBVTHQ/eaiiCvsVUudWmS79tHappP3ybWEbVsaCesdbAjGm5zS zocA== X-Gm-Message-State: AGRZ1gLzNdXR7z7RM5A3JQKH2Q8cyzl/sUNK/yK7QK+qRkjyJeinjMSI hrpkv5MLKkgs86796UkQJcPbjoNDCAHkR4r3yyNZXO2O X-Google-Smtp-Source: AJdET5cid060atrRzroLFq21PEjVZ2Wap5PC08RTlIE5PwXAMWjbTmcOx925EolYQuq2uJhe1UDJtf00Cxs2MVUdDJo= X-Received: by 2002:ac8:6606:: with SMTP id c6mr23040596qtp.376.1542671237142; Mon, 19 Nov 2018 15:47:17 -0800 (PST) MIME-Version: 1.0 References: <1542063113-22438-1-git-send-email-rmanohar@codeaurora.org> <1542063113-22438-4-git-send-email-rmanohar@codeaurora.org> <871s7nv9pl.fsf@toke.dk> <8e7847ff-4c88-10ae-2223-2fc7321641d9@nbd.name> <87sh02tfsp.fsf@toke.dk> <878t1p2bqz.fsf@taht.net> <87muq4sn50.fsf@toke.dk> <4DD985B6-7DBE-42F8-AC87-D6B40CEAE553@superduper.net> In-Reply-To: <4DD985B6-7DBE-42F8-AC87-D6B40CEAE553@superduper.net> From: Dave Taht Date: Mon, 19 Nov 2018 15:47:05 -0800 Message-ID: To: Simon Barber Cc: =?UTF-8?B?VG9rZSBIw7hpbGFuZC1Kw7hyZ2Vuc2Vu?= , Rajkumar Manoharan , Make-Wifi-fast , linux-wireless , ath10k , Felix Fietkau Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Subject: Re: [Make-wifi-fast] [PATCH v3 3/6] mac80211: Add airtime accounting and scheduling to TXQs 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, 19 Nov 2018 23:47:17 -0000 On Mon, Nov 19, 2018 at 3:30 PM Simon Barber wrote: > > > > On Nov 19, 2018, at 2:44 PM, Toke H=C3=B8iland-J=C3=B8rgensen wrote: > > Dave Taht writes: > > Toke H=C3=B8iland-J=C3=B8rgensen writes: > > Felix Fietkau writes: > > On 2018-11-14 18:40, Toke H=C3=B8iland-J=C3=B8rgensen wrote: > > This part doesn't really make much sense to me, but maybe I'm > misunderstanding how the code works. > Let's assume we have a driver like ath9k or mt76, which tries to keep a > > =E2=80=A6. > > > Well, there's going to be a BQL-like queue limit (but for airtime) on > top, which drivers can opt-in to if the hardware has too much queueing. > > > Very happy to read this - I first talked to Dave Taht about the need for = Time Queue Limits more than 5 years ago! Michal faked up a dql estimator 3 (?) years ago. it worked. http://blog.cerowrt.org/post/dql_on_wifi_2/ As a side note, in *any* real world working mu-mimo situation at any scale, on any equipment, does anyone have any stats on how often the feature is actually used and useful? My personal guess, from looking at the standard, was in home scenarios, usage would be about... 0, and in a controlled environment in a football stadium, quite a lot. In a office or apartment complex, I figured interference and so forth would make it a negative benefit due to retransmits. I felt when that part of the standard rolled around... that mu-mimo was an idea that should never have escaped the lab. I can be convinced by data, that we can aim for a higher goal here. But it would be comforting to have a measured non-lab, real-world, at real world rates, result for it, on some platform, of it actually being useful. > Simon > > _______________________________________________ > Make-wifi-fast mailing list > Make-wifi-fast@lists.bufferbloat.net > https://lists.bufferbloat.net/listinfo/make-wifi-fast --=20 Dave T=C3=A4ht CTO, TekLibre, LLC http://www.teklibre.com Tel: 1-831-205-9740