From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-lj1-x241.google.com (mail-lj1-x241.google.com [IPv6:2a00:1450:4864:20::241]) (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 402593B2A4 for ; Wed, 20 Nov 2019 21:05:26 -0500 (EST) Received: by mail-lj1-x241.google.com with SMTP id g3so1308091ljl.11 for ; Wed, 20 Nov 2019 18:05:26 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc:content-transfer-encoding; bh=W9y8MkDsGB3iTJs8dIiEn0Xm5mFuM3VtTw8TaYhfbSM=; b=NBa6RFFKKUzwTR1tKMWK4ke6RdtaKa59x12T2gFitkPW//apFo5r57LOwGXJ8HEOaS fOj7phRH2B/HVac94gu9WvV6nbyclT2X6SV2uf7o210SqZoV5l08xPhgJUYZPu7oejOk ZDS/KpdLoEZJBaIs4UjrnsajP8QXRf3KmsVDgm68E2IJxZOGNnuIFcyopv4YrGFEl9Ao FG5ILSBq8yWkqxVh04zn/hCReS6m/skw3DMTPj3lYrZDizv9w6yiLYhHWRG6/LZCbPBf XvBnLalYn3P0ADqiSgWataq69e2Ls81sFHlV9j5fAq+LEkRCd+OUK4+o2ilcIDmURg7W Kx/w== 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=W9y8MkDsGB3iTJs8dIiEn0Xm5mFuM3VtTw8TaYhfbSM=; b=a0CggMqq5UG+bKe9yOqwvegl2G6+QnDbJJLw1Sbr1/7Ju086Q9bnPQCaOC5CGi6NIl N+IeezXr3pmDfvFwSLUjVrSo7uhEdFdC1SXGi3A4Npb9SH0CQ/3zofT5Kb1/OSC4OiTw QYAxUhAr1UGXkNTbpbFogmZfqjkjqyPc/mkRt5q/llGKGKWaEGyifjolz65DROHfaSX0 NM3utoRyORAl1NMpmJYXJMZLChDkL/R/7U51rpsEuD1xQQrpINoAaZ3g9vjH/uocjxQW wzZuA/Ul9wLuidTh8kEvujmT2P3jCJl3gYMNhMB4JUY76bfh9uHfNDj+hoIafrQzTvck 5JnA== X-Gm-Message-State: APjAAAXWUdNeVwxX8Czz2WrZ8vNFby0KGXBrD3oTtCRzymvebzUQSWTM upJVAU8cq5Aq7Wmt2JslRgxIsQQyWhuTJfW7zjrMEA== X-Google-Smtp-Source: APXvYqxKAUwS9iSLwSGZYRkTZavdu5y/XZl7s+/auYNw2yF0yO/BOqnXRvH/Pfy8Eex3WanUT/z+OMjOW4iUoSZ1g4g= X-Received: by 2002:a2e:9ecf:: with SMTP id h15mr5166056ljk.173.1574301924723; Wed, 20 Nov 2019 18:05:24 -0800 (PST) MIME-Version: 1.0 References: <20191115014846.126007-1-kyan@google.com> <8736eiam8f.fsf@toke.dk> In-Reply-To: <8736eiam8f.fsf@toke.dk> From: Kan Yan Date: Wed, 20 Nov 2019 18:05:13 -0800 Message-ID: To: =?UTF-8?B?VG9rZSBIw7hpbGFuZC1Kw7hyZ2Vuc2Vu?= Cc: Dave Taht , Rajkumar Manoharan , Kevin Hayes , Make-Wifi-fast , linux-wireless , Yibo Zhao , John Crispin , Johannes Berg , Lorenzo Bianconi , Felix Fietkau Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Subject: Re: [Make-wifi-fast] [PATCH v8 0/2] Implement Airtime-based Queue Limit (AQL) 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, 21 Nov 2019 02:05:26 -0000 > It would be interesting to get some samples of the actual sojourn time > as seen by CoDel in mac80211. Might be doable with bpftrace... I will try to add some trace event to get the sojourn time for the next round of tests. On Wed, Nov 20, 2019 at 2:14 AM Toke H=C3=B8iland-J=C3=B8rgensen wrote: > > Kan Yan writes: > > >> Those were lovely, thanks!!!! Big win. Since you are on patch v10 > >> now.... Any chance you could turn ecn on and off and give it a go > >> again in your next test run? > >> > >> > >> Also: > >> > >> --step-size=3D.04 --socket-stats # the first is helpful to gain more > >> detail, the second as to the behavior of the tcp stack. > > > > Thanks for the feedback! I will do more tests in a few days. > > > > > >> Secondly - and AFTER this patchset stablizes, I'd like us to look into > >> returning the codel default to 10ms or less > >> from it's currently 20ms or worse setting. Tis another easy test > > > > Smaller CoDel "target" doesn't work well with wireless because the > > dequeue behavior in wireless driver is very bursty. It is quite often > > dequeues dozens of packets in one burst after one large aggregation is > > completed, so smaller CoDel "target" can cause unnecessary packet > > drop. > > It would be interesting to get some samples of the actual sojourn time > as seen by CoDel in mac80211. Might be doable with bpftrace... > > -Toke >