From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from nm40-vm0.bullet.mail.ne1.yahoo.com (nm40-vm0.bullet.mail.ne1.yahoo.com [98.138.229.176]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client did not present a certificate) by huchra.bufferbloat.net (Postfix) with ESMTPS id EC4DD21F11D for ; Sun, 18 Nov 2012 08:09:06 -0800 (PST) Received: from [98.138.90.48] by nm40.bullet.mail.ne1.yahoo.com with NNFMP; 18 Nov 2012 16:09:03 -0000 Received: from [98.138.89.199] by tm1.bullet.mail.ne1.yahoo.com with NNFMP; 18 Nov 2012 16:09:03 -0000 Received: from [127.0.0.1] by omp1057.mail.ne1.yahoo.com with NNFMP; 18 Nov 2012 16:09:03 -0000 X-Yahoo-Newman-Property: ymail-3 X-Yahoo-Newman-Id: 732930.410.bm@omp1057.mail.ne1.yahoo.com Received: (qmail 13304 invoked by uid 60001); 18 Nov 2012 16:09:03 -0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=yahoo.com; s=s1024; t=1353254943; bh=ubpbVMxA9+Y4cqTX4Ul6FuvLPYQCf5+7NzmJYp9jkrY=; h=X-YMail-OSG:Received:X-Rocket-MIMEInfo:X-Mailer:References:Message-ID:Date:From:Reply-To:Subject:To:In-Reply-To:MIME-Version:Content-Type; b=Ql6EdyDk4cuAcAqcan6gegGPuI3yRVAWxlZQOuAYJUnr2bR1JRnXZkX82LbQS+X3Tz24TIx1YwbVBh4zcKFCI6+1eUBDMykn8isje+O5q8fPmwvD8L1b7VMmA8EE8CHlhm5fS7wAPrFYvnlPD4PBZpBxhwlDRHp81bcyUWROvMk= DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=s1024; d=yahoo.com; h=X-YMail-OSG:Received:X-Rocket-MIMEInfo:X-Mailer:References:Message-ID:Date:From:Reply-To:Subject:To:In-Reply-To:MIME-Version:Content-Type; b=2q2Azl8VRnth6EuRgqBsAwF+4WrakUGke7Ayrz9aMt3fH+zStuA5kefug+flVAUwG00H8B3ksU73TpQPr+IIhFmUsQYIvRLdDP3vclZ9OtBDl92SbCQM/YfSS41aD6tefOrJKX3uhSeHpLdB0bmVjtp9fby9rNJ2T6Nft6enEjQ=; X-YMail-OSG: PM7lmioVM1nHdhNYuyV6fZZ1bK2rutIgsmPpc2xPlv9tlsB aPOZG.gflVPRU9LbH1UXmlARpijYew.mySIar5cuDZhIvDZ.pxeBFOALS_HO yWg4hsZSA4y267aB6Cts3UZJ0jfZi_zs.PFaiM3ptkTHfzOF7Ql.MkVs0Pm4 qZmYoRkGeFyTBXPsXuMSsYPru9UcHxp4YWHxuUbUH9Qy61VhIkeLmnaTr.Ax NxzoSCYuVwkyBtQTNeExwxikggGjF6ljSXhP43s4046_cSJ3cUcZBv1NJoy8 ndXB8PP24.WC8u04wNuv13SRiBOseNbKzq9LT3R7ZVgfbk5wqN6oanHR93Nt gAxd_KuB.zVw7PNbVwrrTsxUQJfbfOQGE2JrfGfrmIPHKKxPfScb4uwdpTCX ibF7JeLYydvn5f3C0WHrizetgUHofWbgre9JTeV9wN2mOpiGYelkqd95h6c8 ODRl2MC2q58_8TN1ABnvll2IRcGlOPME5OAmLvjl8mBtEe53o.Flmm.VscmA 7v9llTZfhoCt7bWqy_bd3hdzqPhACfU9vgw-- Received: from [79.68.65.87] by web126202.mail.ne1.yahoo.com via HTTP; Sun, 18 Nov 2012 08:09:03 PST X-Rocket-MIMEInfo: 001.001, SSBoYXZlIG5vdGljZWQgZGVsYXlzIC0gYWx0aG91Z2ggSSBkb24ndCB0aGluayBtdWx0aXBsZSBzZWNvbmRzIC0gYnV0IEkgdGhpbmsgdGhhdCBpdCBtYXkgYmUgc2t5cGUgdHJ5aW5nIHRvIG1ha2UgdGhlIGJlc3Qgb2YgYSBiYWQgY29ubmVjdGlvbi4gSSBkb24ndCBoYXZlIGFueSBrbm93bGVkZ2Ugb2YgdGhlIGludGVybmFscyBvZiB0aGUgc2t5cGUgY2xpZW50LCBidXQgSSBzdXNwZWN0IHRoYXQgdGhleSB0YWtlIHRoZSB2aWV3IHRoYXQgZGVsYXllZCBhdWRpbyBpcyBiZXR0ZXIgdGhhbiBpbmNvbXByZWgBMAEBAQE- X-Mailer: YahooMailWebService/0.8.123.460 References: <647D57F5-24CE-4006-AD2A-74141C84C3CB@ifi.uio.no> Message-ID: <1353254943.93761.YahooMailNeo@web126202.mail.ne1.yahoo.com> Date: Sun, 18 Nov 2012 08:09:03 -0800 (PST) From: Alex Burr To: bloat In-Reply-To: <647D57F5-24CE-4006-AD2A-74141C84C3CB@ifi.uio.no> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Subject: Re: [Bloat] Skype X-BeenThere: bloat@lists.bufferbloat.net X-Mailman-Version: 2.1.13 Precedence: list Reply-To: Alex Burr List-Id: General list for discussing Bufferbloat List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 18 Nov 2012 16:09:07 -0000 I have noticed delays - although I don't think multiple seconds - but I think that it may be skype trying to make the best of a bad connection. I don't have any knowledge of the internals of the skype client, but I suspect that they take the view that delayed audio is better than incomprehensible audio - I think I have even heard it actually repeating the last bit of audio before a glitch, to give you a better chance to understand the next bit, and presumably catching up when the opportunity arises. So, an experiment to rule out skype might need to use not just a de-bloated path, but one with known packet loss. Alex ----- Original Message ----- > From: Michael Welzl > To: bloat > Cc: > Sent: Sunday, November 18, 2012 2:57 PM > Subject: [Bloat] Skype > > Hi, > > I have repeatedly noticed that Skype sometimes, in a long conversation involving > video, can create massive audio delays (in the order of multiple seconds). This > has happened to me in a conversation from a hotel room in the US to my home in > Oslo (where, apologies, I haven't yet looked into de-bloating my modem and > access point), and from my office in Oslo to someone else's office in the > US. > > I'm wondering: was that always due to bloated equipment along the path > (including the end hosts), or does Skype poorly handle its internal buffers? > > Any experiences? I suppose the way to find out is to run Skype over a verifiably > de-bloated path. If, then, the problem never occurs, the fault is with the > equipment and not with Skype (and vice versa). > > Cheers, > Michael > > _______________________________________________ > Bloat mailing list > Bloat@lists.bufferbloat.net > https://lists.bufferbloat.net/listinfo/bloat >