From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-40134.protonmail.ch (mail-40134.protonmail.ch [185.70.40.134]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by lists.bufferbloat.net (Postfix) with ESMTPS id C3CF53CB35 for ; Fri, 15 Jan 2021 11:59:59 -0500 (EST) Date: Fri, 15 Jan 2021 16:59:46 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=protonmail.com; s=protonmail; t=1610729998; bh=0S6V1acaD1sOus2uVkWMdH4g1aBKb6EZ6XjyRSxPuZY=; h=Date:To:From:Cc:Reply-To:Subject:In-Reply-To:References:From; b=GScOakcQUAahyjSn9sHCILo+QXBLMn/cxwrGWU3CrWj075Zl57y1wgS4TBQv72APh 4f/gQjFwhLym7EAyzCh2aNxeB09GH71qe0N/ObOCFljdeE0NNkz0IezJeQbIAAgXqM jkOGsjOJ5AiNqxc0FeHv/BCHw4V2vuRfnQgYD2ms= To: =?utf-8?Q?Toke_H=C3=B8iland-J=C3=B8rgensen?= From: Michael Yartys Cc: "make-wifi-fast@lists.bufferbloat.net" Reply-To: Michael Yartys Message-ID: In-Reply-To: <87a6tarwy3.fsf@toke.dk> References: <87a6tarwy3.fsf@toke.dk> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable X-Spam-Status: No, score=-1.2 required=10.0 tests=ALL_TRUSTED,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,FREEMAIL_FROM shortcircuit=no autolearn=disabled version=3.4.4 X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on mailout.protonmail.ch 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: Fri, 15 Jan 2021 16:59:59 -0000 I assume that I got it right by running: flent --test-parameter ping_hosts=3D1.1.1.1 -l 300 netperf-eu.bufferbloat.n= et tcp_8down Either way, I think I'll have to do this test at another time since someone= is streaming TV downstairs (via Ethernet!) and it really pollutes the resu= lts: https://imgur.com/a/F33LjeA For what it's worth, the ping to 1.1.1.1 looks the same. Michael =E2=80=90=E2=80=90=E2=80=90=E2=80=90=E2=80=90=E2=80=90=E2=80=90 Original Me= ssage =E2=80=90=E2=80=90=E2=80=90=E2=80=90=E2=80=90=E2=80=90=E2=80=90 On Friday, January 15th, 2021 at 17:23, Toke H=C3=B8iland-J=C3=B8rgensen wrote: > Michael Yartys via Make-wifi-fast make-wifi-fast@lists.bufferbloat.net > > writes: > > > Hi > > > > I decided to run a couple of flent 8-stream TCP downloads from > > > > netperf-eu.bufferbloat.net to my Fedora 33 laptop, and I noticed some > > > > weird periodic latency in the resulting graphs. My router is the > > > > NETGEAR R7800 running OpenWrt with an ath10k radio. Here's a graph > > > > that's representative of the results that I got: > > > > https://imgur.com/a/BOKNzht > > > > This looks similar to the latency spikes you would get from channel > > > > scans, but I have specified the BSSID in the Gnome network settings, > > > > which means that background scanning should be disabled. In addition, > > > > the test ran for 30 minutes, and channel scans are much more frequent > > > > than the latency spikes seen in the graph above. Here's what channel > > > > scans look like in a 15 minute long test: https://imgur.com/a/YJepfcp > > > > Does anyone here know what could be causing this behaviour? > > Hmm, your email reminds me that the server you are testing against was > > having some issue before the holidays. So it may just be that it's > > crapping out and it has nothing to do with your connection. > > You could try adding a secondary ping flow (--test-parameter > > ping_hosts=3Done.one.one.one should do it) and see if that secondary flow > > also shows the same spikes. If it does, it's likely your connection, if > > not it's likely the server... > > -Toke