From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from uplift.swm.pp.se (ipv6.swm.pp.se [IPv6:2a00:801::f]) (using TLSv1.2 with cipher ADH-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by lists.bufferbloat.net (Postfix) with ESMTPS id C46BE3CB38; Wed, 4 Aug 2021 09:06:42 -0400 (EDT) Received: by uplift.swm.pp.se (Postfix, from userid 501) id 84050AF; Wed, 4 Aug 2021 15:06:40 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=swm.pp.se; s=mail; t=1628082400; bh=hpXEay9jwAKk/VgFwg6qlaKO2t14X7+7kd2E/6apEwY=; h=Date:From:To:cc:Subject:In-Reply-To:References:From; b=GVYOvZj0pm6vs4iaj9BFOu4BfygWjFnSqi5NZbH6lKOcFKyDYB0yWVfFINaTUPtt4 lq5zzLCSiG0zJzojK+MKHZvOrYj1o0HcBGcqyv1wBKcmTd7XaJY+Puf5cGk54s1BbB OrSk1n8rsKgEyl5t820COjLoeo0lXORTjTs9iveQ= Received: from localhost (localhost [127.0.0.1]) by uplift.swm.pp.se (Postfix) with ESMTP id 814AE9F; Wed, 4 Aug 2021 15:06:40 +0200 (CEST) Date: Wed, 4 Aug 2021 15:06:40 +0200 (CEST) From: Mikael Abrahamsson To: Sebastian Moeller cc: Mikael Abrahamsson via Bloat , Jonathan Morton , starlink@lists.bufferbloat.net, dickroy@alum.mit.edu In-Reply-To: <5C65BC6E-1ABD-4432-B2CE-AC8BACDA363D@gmx.de> Message-ID: References: <058681B8-89EB-42ED-8E82-4048BA3C9504@cable.comcast.com> <649DC4B024D74B8BA6926ABFCD52DC79@SRA6> <5C65BC6E-1ABD-4432-B2CE-AC8BACDA363D@gmx.de> User-Agent: Alpine 2.20 (DEB 67 2015-01-07) Organization: People's Front Against WWW MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed Subject: Re: [Starlink] [Bloat] Of interest: Comcast AQM Paper X-BeenThere: starlink@lists.bufferbloat.net X-Mailman-Version: 2.1.20 Precedence: list List-Id: "Starlink has bufferbloat. Bad." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 04 Aug 2021 13:06:42 -0000 On Wed, 4 Aug 2021, Sebastian Moeller wrote: > I guess the point is AQM is not really that expensive, even FQ AQM, > traffic shaping however is expensive. But for wifi shaping is not > required so AQM became feasible. My point is that CPU based forwarding has very bad performance on some platforms, regardless if you're doing shaping, AQM or none of them (FIFO). If it's not hw accelerated, it sucks. When I did tests on MT7621 it did ~100 meg/s without flow-offload, and full gig with it. -- Mikael Abrahamsson email: swmike@swm.pp.se