From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-out1.uio.no (mail-out1.uio.no [IPv6:2001:700:100:10::57]) (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 7F96821F108 for ; Sun, 18 Nov 2012 06:58:00 -0800 (PST) Received: from mail-mx2.uio.no ([129.240.10.30]) by mail-out1.uio.no with esmtp (Exim 4.75) (envelope-from ) id 1Ta6Jo-0002qD-Lr for bloat@lists.bufferbloat.net; Sun, 18 Nov 2012 15:57:56 +0100 Received: from vpn-client334.uio.no ([193.157.137.81] helo=[10.0.0.127]) by mail-mx2.uio.no with esmtpsa (TLSv1:AES128-SHA:128) user michawe (Exim 4.80) (envelope-from ) id 1Ta6Jo-0008N0-3I for bloat@lists.bufferbloat.NET; Sun, 18 Nov 2012 15:57:56 +0100 Message-Id: <647D57F5-24CE-4006-AD2A-74141C84C3CB@ifi.uio.no> From: Michael Welzl To: bloat Content-Type: text/plain; charset=US-ASCII; format=flowed; delsp=yes Content-Transfer-Encoding: 7bit Mime-Version: 1.0 (Apple Message framework v936) Date: Sun, 18 Nov 2012 15:57:53 +0100 X-Mailer: Apple Mail (2.936) X-UiO-SPF-Received: X-UiO-Ratelimit-Test: rcpts/h 4 msgs/h 2 sum rcpts/h 6 sum msgs/h 3 total rcpts 217 max rcpts/h 15 ratelimit 0 X-UiO-Spam-info: not spam, SpamAssassin (score=-5.4, required=5.0, autolearn=disabled, RP_MATCHES_RCVD=-0.401, UIO_MAIL_IS_INTERNAL=-5, uiobl=NO, uiouri=NO) X-UiO-Scanned: 8DA9D339BA8B8FCE62BFC263E80EB63DC5165264 X-UiO-SPAM-Test: remote_host: 193.157.137.81 spam_score: -53 maxlevel 80 minaction 2 bait 0 mail/h: 2 total 4 max/h 2 blacklist 0 greylist 0 ratelimit 0 Subject: [Bloat] Skype X-BeenThere: bloat@lists.bufferbloat.net X-Mailman-Version: 2.1.13 Precedence: list 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 14:58:01 -0000 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