From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-ie0-x232.google.com (mail-ie0-x232.google.com [IPv6:2607:f8b0:4001:c03::232]) (using TLSv1 with cipher RC4-SHA (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority G2" (verified OK)) by huchra.bufferbloat.net (Postfix) with ESMTPS id 6BEA021F18F for ; Sun, 8 Dec 2013 06:22:12 -0800 (PST) Received: by mail-ie0-f178.google.com with SMTP id lx4so4539503iec.9 for ; Sun, 08 Dec 2013 06:22:11 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type; bh=MhLWLL61MyK7OCuO7N3jSOoCmPOkpo7MRVJWGrw0tXs=; b=isEjJnY7GnGY8fdH/x8UH3a64948XtIRvdDlhc1RW7xlI0uNr3ovHATtJ/giYpHQTp fEBauxpPHt3oA4kZZrFTCpSyfnDWFyYkvOOwZj2KbY5m2KbKilu+xTlmMokICUv5IhIm QxmvhYU7QcI+vwzNA1Eoc1iViffd7WXeujTvYTY3aJPuaL8hJqaa0RmbdtZJjWOPKYGt UmUZimJouRU0RW2OhqPN2Nig5ODy0CHzTKHh8z8sy6OHl3Ob823wvfd8dcFX3ZyHwbnn dL8XVKMBrtuXQL+WECCZOMkEr5BmTYsmXGnUVPV+H5Y9D80gYHjzjBlqaIBpYy+8ZdXu qGZw== MIME-Version: 1.0 X-Received: by 10.50.61.205 with SMTP id s13mr11857162igr.29.1386512531593; Sun, 08 Dec 2013 06:22:11 -0800 (PST) Received: by 10.64.106.69 with HTTP; Sun, 8 Dec 2013 06:22:11 -0800 (PST) In-Reply-To: References: <20131203222559.GV8066@einstein.kenyonralph.com> <7ieh5pew2d.wl%jch@pps.univ-paris-diderot.fr> <87haakx1ev.wl%jch@pps.univ-paris-diderot.fr> <20131208012751.GA6382@sesse.net> Date: Sun, 8 Dec 2013 15:22:11 +0100 Message-ID: From: Aaron Wood To: Mikael Abrahamsson Content-Type: multipart/alternative; boundary=047d7bd7679aec225404ed069a00 Cc: bloat Subject: Re: [Bloat] curious..... 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, 08 Dec 2013 14:22:12 -0000 --047d7bd7679aec225404ed069a00 Content-Type: text/plain; charset=ISO-8859-1 > The comment about the WNDR3800 not being able to push this is of course relevant, so I guess we need a better platform if we want to do testing for these higher speeds. One thing that I've noticed a number of newer chipsets doing is moving "network acceleration" into hardware, as a way to get to gigabit speeds with a <1GHz processor. I've been leery of them for fear of how much the linux network stack has to get hacked up to make that hardware work. If it's just DMA, that's one thing, but if it's implementing packet inspection in hardware... Not so much. At least for a research/testing platform, a pure software solution is definitely going to be more useful. -Aaron --047d7bd7679aec225404ed069a00 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable

> The comment about the WNDR3800 not being abl= e to push this is of course relevant, so I guess we need a better platform = if we want to do testing for these higher speeds.

One thing that I've noticed a number= of newer chipsets doing is moving "network acceleration" into ha= rdware, as a way to get to gigabit speeds with a <1GHz processor. =A0
I've been leery of them for fear of how much the linux n= etwork stack has to get hacked up to make that hardware work. =A0If it'= s just DMA, that's one thing, but if it's implementing packet inspe= ction in hardware... =A0Not so much. =A0At least for a research/testing pla= tform, a pure software solution is definitely going to be more useful.

-Aaron

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