From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-qk0-x22c.google.com (mail-qk0-x22c.google.com [IPv6:2607:f8b0:400d:c09::22c]) (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 DA0B63B29E for ; Sun, 19 Nov 2017 17:13:32 -0500 (EST) Received: by mail-qk0-x22c.google.com with SMTP id w125so5388109qkb.6 for ; Sun, 19 Nov 2017 14:13:32 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:in-reply-to:references:from:date:message-id:subject:to :cc:content-transfer-encoding; bh=h5eBleKYTO9u4G0Dm+wztgt2nuyTzvOSQHKQWGD+EkI=; b=rDkHNRjP5Wn2oSSQf+4pdBwQmcAlGT7es2aUKrqqohc70R1iMxYNsNfY8LAR6kgpTy sr65f0ilqDw4YKlPdvFuEIrSq8tqJr4YC2rOwtewAJ0vk+OpTzsXiZCmUSyfk+s1wSyH D0gXdZej986JEO28p83QTi1wEztd4EAvgOnc1u8tHDM4XJJJ65geFBm4FqoQMfsU0v16 HsNDOWIKr4hC6MZsx/18Y18gEC5701SC5C0jjsJ79C5v6RRcH8o1EA7XlLLpVQ29hagb V99oGIMX1hB0UPH0VKeThOo/VBu1QxmclqMcWAHOG/hfh9pjNvrTFdvQ1JAS+fs9NXKl Z20g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:in-reply-to:references:from:date :message-id:subject:to:cc:content-transfer-encoding; bh=h5eBleKYTO9u4G0Dm+wztgt2nuyTzvOSQHKQWGD+EkI=; b=g7AcigDFqcQfHsUJVgqSKjzGVwna3Ho9w3je9nwVqyTdPqiyf0ZxuYr6U4xGWC5TLG flyh7/sQMoFHs//Dw2cgDzPX8eghMNLwJ6ugqzRq+SXDLIlmoWLwksHIKxFlsQq8Lti1 b46O0E7EZIQcttFcdGeX6kLv/3LGGec6Kxn+7JGocWQZjtKk3TT0dSQ5jMxawWGHUd01 /Sd5LdnqrxWwZZnL8yhrj+gR3dHhu/vC+sw8SIYQ1WNJuz0mQOK5+TOluvJYCyEfVAM+ F6HOvBuJg1vb2xxDk8do+VOy+039noFgwcpGM2+75q1KFJG3L9alFIzoZmD47k3Qzfkl SUOA== X-Gm-Message-State: AJaThX5VZz+A9GgPYYi+EL4rzN0Pos68450bQqBtIvDRqc8o9izuLi1Y G4l2getrwKQPN8o7OVofPO/YtrMoTn/EizmMVG8= X-Google-Smtp-Source: AGs4zMYCqW/nY99fAjhXr9CiKr1oNt/FnTTn17I1anqc4nO2gmRjGIYZsUQevWzmm7daH4HADPCw7hOlrmBpYs715UU= X-Received: by 10.55.154.85 with SMTP id c82mr18760701qke.327.1511129612485; Sun, 19 Nov 2017 14:13:32 -0800 (PST) MIME-Version: 1.0 Received: by 10.12.193.93 with HTTP; Sun, 19 Nov 2017 14:13:32 -0800 (PST) In-Reply-To: References: <8760a6b5ce.fsf@toke.dk> <87tvxq9cyh.fsf@toke.dk> From: Dave Taht Date: Sun, 19 Nov 2017 14:13:32 -0800 Message-ID: To: Caleb Cushing Cc: =?UTF-8?B?VG9rZSBIw7hpbGFuZC1Kw7hyZ2Vuc2Vu?= , bloat Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Subject: Re: [Bloat] Steam In Home Streaming on ath9k wifi X-BeenThere: bloat@lists.bufferbloat.net X-Mailman-Version: 2.1.20 Precedence: list List-Id: General list for discussing Bufferbloat List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 19 Nov 2017 22:13:32 -0000 On Sun, Nov 19, 2017 at 2:03 PM, Caleb Cushing wr= ote: >> >> Right, no idea how Windows drivers behave. But odds are that the >> bottleneck is at the client, since that often has worse antennas than >> the AP. If you're in a position to take packet captures at both clients >> and AP you may be able to figure it out; may require tightly >> synchronised clocks to do properly, though. > > > I could try running wireshark on both, it's a ton of packets, and I'll be > honest, I don't know that *I* would know what to do with them. > >> >> How do you see the latency spikes? An end-to-end ping? You could try >> pinging the AP from both clients and see which one sees the latency >> spike... > > > steam homestreaming has an in game performance monitor, it shows you your > ping, estimated bandwidth, and how fast it's currently streaming. So when > the game stutters I also notice a recorded ping/latency increase. Sadly > though, it doesn't include highly detailed logs to my knowledge. > >> Yeah, those are link-layer retransmissions. The ath9k driver sometimes >> retries individual packets up to 30 times, which is obviously way too >> much... > > > that's fun... Ideally we should retry at most, twice, at the lowest rate, and a bit more as we go up. > -- > Caleb Cushing > > http://xenoterracide.com > > _______________________________________________ > Bloat mailing list > Bloat@lists.bufferbloat.net > https://lists.bufferbloat.net/listinfo/bloat > --=20 Dave T=C3=A4ht CEO, TekLibre, LLC http://www.teklibre.com Tel: 1-669-226-2619