From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-qt1-x834.google.com (mail-qt1-x834.google.com [IPv6:2607:f8b0:4864:20::834]) (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 5C7E13BA8E for ; Fri, 4 Jan 2019 12:11:00 -0500 (EST) Received: by mail-qt1-x834.google.com with SMTP id k12so41060936qtf.7 for ; Fri, 04 Jan 2019 09:11:00 -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; bh=MfF2twAilce1E1KI2oENKSrytkOKcMOwJf62keaILfo=; b=FTdDXpBtXYlr+vNhVrURRu2nH7Npi/MKCwQqLvszk6+ZOsbTjTi9vzNBcZWHYbEmf2 wTuhS69xvNeJWvoyLCCw+egE3t6s5dcWn2YxWLshI7lLm9o8KA9EnL7k1YX9TjnHrswP ZF2XhJhDpI2D70iYkQn3iqs6CjO7TGf+A4JrG9rfUKBCU7iKvcVNaPI1wdqjr2PeX6Xq KUtVhsGzrX3T9kLOcKTnF1r41wd69GkStDyKCLZv3LysabLKCPVhpXR/3eEOB1/1qe5B 7rs/XzGtpoUq8K/vLIPpu7nGWDXxa919bevwNM4ltajaoaKJTFw5zA3tjxYch6SVIGoi veAg== 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; bh=MfF2twAilce1E1KI2oENKSrytkOKcMOwJf62keaILfo=; b=amwpqsG3ftoHBCJXtK6C5rBbSQGqM2oqysdjDJA2NOOtp3Z6/AABr4dVU+airw7RUN V0XFE+kodbPx2+txOZM0gTyHolYUy2sBUZhSOfDSQ/sBOIcRW5CKjYfqKRL0tNLOCmbX +IVF9k53RkWUUemekv1pfYbWuhB8waDPwK8rkyKtW8fIxB7VZozOamkVy3Lgo7r0GHL3 yS/8asGahCXu8omn+XniKzGaJhhrSpigja0sUY9HoVbuCQ3vlJz7hJdZFEVrG/CTXnOH VM0R7zhtQyWY5H84ZTIbq25YvyVwMrjTbshCTmIkRwzhAgJn1DaYLxKQJt+dT+JUZIq0 YPqw== X-Gm-Message-State: AJcUukdTZxNe/4wDaW/6BBoOs+8G0+ljc1CWYoJH78RUCcOTFe85Kioz jmTQx9EEd3LvUn+pQhvz8+oH77j9ZtaGCfEVWIbA5w== X-Google-Smtp-Source: AFSGD/XRI4brmorXt7cgrAMcwP65hL+ngWM0mJYaRDBihb9bt+tXErjKRnNv4ggd3cUdTnf8SyzICp8pmplZG7x2Ggo= X-Received: by 2002:ac8:3065:: with SMTP id g34mr52093872qte.136.1546621859766; Fri, 04 Jan 2019 09:10:59 -0800 (PST) MIME-Version: 1.0 References: In-Reply-To: From: Dave Taht Date: Fri, 4 Jan 2019 09:10:47 -0800 Message-ID: To: cloneman Cc: bloat Content-Type: text/plain; charset="UTF-8" Subject: Re: [Bloat] Does VDSL interleaving+FEC help bufferbloat? 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: Fri, 04 Jan 2019 17:11:00 -0000 dsl interleave was added primarily to make multicast udp tv streams work better (as they are very intolerant of packet loss). Often (as in free's implementation) these streams are "invisible" to the overlying IP applications. It typically adds at least 6ms of delay to an already slow technology. Do measure unloaded latency with and without it on, it's been a long time since I fiddled with it....