From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-io1-xd33.google.com (mail-io1-xd33.google.com [IPv6:2607:f8b0:4864:20::d33]) (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 940373B29E for ; Sat, 16 Jan 2021 13:20:43 -0500 (EST) Received: by mail-io1-xd33.google.com with SMTP id u17so24769060iow.1 for ; Sat, 16 Jan 2021 10:20:43 -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=O9Hy5RoLswq3HqxDi/r6ZtaEJEYqgUbqhQNMZAsiSrc=; b=R10+JvmDRvGHTqKxgjGOlL7bvygWnYEZ/NkouxV0mWUU3NW8vnAFAuY2QD/Ky+20rf MXgcMyKS4MsFgmppFC8odlesTVTTlxszpWnpAlUlCViEaH7k8V/zk/4qvDVEyQLW625/ TxmR4hionlW9Y1Ae6iZCauUc9rvgPsc5I5cAd5xs/1/3kOYQAAfF1gQ3eAI2PN/M42vg cwtmhRwOfsttXdzjMi1w7bvQTRnYRq6fd/9xUNKVxiI0mY8GHGZWoH7FfJJlxloAur4z Fh8kZUKHcwfp/C5Akbs4pm9IOYTxvxqW8nICNDMKfdOTR+u4/2KcZ15znlTeE2/IxNNK 8MgA== 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=O9Hy5RoLswq3HqxDi/r6ZtaEJEYqgUbqhQNMZAsiSrc=; b=MnIOGuMWhpZElV0r2FJ8DdvR3htHPwVix72/FvGBr06iItK06L86wM6iep/fw30YUd DXCqP7nng9POgp+U97dEKtr1Na1rWvFda6C9RVd63Rfe9RgX4Ar/Q27XLfpzLiQPdzU7 Y6FlNpKPE2HQEeUGNW2SO5ABbx+t4451Aq9qGlKiHbDBEoUeSgRCaF9dX0UqZW77X78R YqnPtQY9ao8duz6uqEXk9bQ2rH+7rx0gpodnuqbPrqj508w16TI5I4m3WWEQSiI9qIwi FM237ekVtU4zo1DrAA7uz/LXTiIqPeES0IgX2lJL5Dy2CgnieLa/5Pftnx9uekZ42UK7 IP5A== X-Gm-Message-State: AOAM533HFcH7hJkTVphy7FMzWlRWIh/4I6JQ6CSMVlE8aC0IVgg/3Ipj IDWf9dz2wBMqC4rYnAhKwXUVs5uwWrTcYjWIuaw= X-Google-Smtp-Source: ABdhPJxPsJiH9FIrOrU1lKtpv4HNyJKjINbEz203ynzb8wC1aEDVCbzH0E0Phwqamygzi7kcD+x23T4AkLRBrKfh94E= X-Received: by 2002:a05:6638:164c:: with SMTP id a12mr14956321jat.128.1610821242975; Sat, 16 Jan 2021 10:20:42 -0800 (PST) MIME-Version: 1.0 References: In-Reply-To: From: Dave Taht Date: Sat, 16 Jan 2021 10:20:31 -0800 Message-ID: To: Michael Yartys Cc: Bob McMahon , Make-Wifi-fast Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Subject: Re: [Make-wifi-fast] Weird periodic 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: Sat, 16 Jan 2021 18:20:43 -0000 On Sat, Jan 16, 2021 at 10:15 AM Michael Yartys wrote: > > On Saturday, January 16th, 2021 at 19:06, Dave Taht = wrote: > > > thxz for the clarification. > > No worries! =3D) > > > > > Also, I would really like the codel target reduced to 10ms on the > > > > upcoming release of openwrt. > > I ran the 10ms target for a while but don't really remember whether I not= iced that much of a difference. Maybe I should try it again? =3D) you've got some good reference data now. > > Right now I'm planning to try out Toke's virtual time-based scheduler: ht= tps://github.com/tohojo/openwrt/blob/virtual-airtime/package/kernel/mac8021= 1/patches/subsys/346-mac80211-Switch-to-a-virtual-time-based-airtime-sche.p= atch > > > > > On Sat, Jan 16, 2021 at 10:01 AM Michael Yartys > > > > michael.yartys@protonmail.com wrote: > > > > > On Saturday, January 16th, 2021 at 18:48, Dave Taht dave.taht@gmail.c= om wrote: > > > > > > > That implies it is doing a channel scan. Dumb. > > > > > > > > https://blog.cerowrt.org/post/disabling_channel_scans/ > > > > > > > > but what you encountered seemed more disabling than that, and the > > > > > > > > ath10k is supposed to be able to do background channel scans. > > > > > > The tests where I experienced the roller-coaster high latency were th= e result of a fluke I believe. It went away after a reboot and I wasn't rea= dily able to reproduce it. Also, I believe there's some confusion here sinc= e my laptop, which was doing the background scans, has an Intel 7260AC card= . ath10k is not at fault here (might have been during the fluke, but who kn= ows). > > > > > > > On Sat, Jan 16, 2021 at 6:47 AM Michael Yartys > > > > > > > > michael.yartys@protonmail.com wrote: > > > > > > > > > I'm pretty sure I've managed to figure out what causes the short = sharp periodic latency spikes. The Gnome location service uses the surround= ing wireless networks as one of the methods to determine your location. Whe= n it's turned on I get the following results: > > > > > > > > > > https://imgur.com/a/pNXuVRe > > > > > > > > > > When it's disabled the latency spikes are gone (and notice that A= QL is working here as there is some background traffic from other clients): > > > > > > > > > > https://imgur.com/a/v4wWkAC > > > > > > > > > > Now, I wasn't able to reproduce the weird roller coaster like lat= ency that I saw previously. I rebooted the laptop before I did these tests,= so I guess that solved it. > > > > > > > > > > Michael > > > > > > > > -- > > > > > > > > "For a successful technology, reality must take precedence over pub= lic > > > > > > > > relations, for Mother Nature cannot be fooled" - Richard Feynman > > > > > > > > dave@taht.net CTO, TekLibre, LLC Tel: 1-831-435-07= 29 > > > > -- > > > > "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 --=20 "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