From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-we0-f171.google.com (mail-we0-f171.google.com [74.125.82.171]) (using TLSv1 with cipher RC4-SHA (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority" (verified OK)) by huchra.bufferbloat.net (Postfix) with ESMTPS id 40CC9201A8E for ; Mon, 4 Jun 2012 11:47:37 -0700 (PDT) Received: by wejx9 with SMTP id x9so6286129wej.16 for ; Mon, 04 Jun 2012 11:47:34 -0700 (PDT) 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 :content-type:content-transfer-encoding; bh=hMJDyg56ZEno/7JBbv0Z+xeoLkka3S9TRnjk24yoqbc=; b=zH5SqJpTS6kgf+uW1gbmgseBGKDbAmmMq1KqNy+823u0uwYjnUb66ZmrJTjxLGtX4c E6BZ023vrsfDk5jxKFb44k+OervG/VmSKMNJXYSpU2o2+TkgpUhfesaewiZhjR0doAWa +WEXiLae/tFbIiBpI8PQLvAYjpF7Mj/56htteo0GdWNgCEYMFsXzkuyRd2V2cgnpFAk0 2U4eWCzSY5gJu0KEi2+9aRBBFqLlCLXrouvF/Pay/KmdIN1wcBdD66cJ7ROGLHE2nw5v QY1SHS/+LepeYV9BkDdZ7DZ1zYf1yO8vxFXzUjI4+cytsil5qiVonQCGXKCmxrajBwnK TvUw== MIME-Version: 1.0 Received: by 10.216.199.95 with SMTP id w73mr12350964wen.196.1338835654727; Mon, 04 Jun 2012 11:47:34 -0700 (PDT) Received: by 10.223.103.199 with HTTP; Mon, 4 Jun 2012 11:47:34 -0700 (PDT) In-Reply-To: <4FCCFE76.3060304@candelatech.com> References: <4FCCFE76.3060304@candelatech.com> Date: Mon, 4 Jun 2012 19:47:34 +0100 Message-ID: From: Dave Taht To: cerowrt-devel@lists.bufferbloat.net Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Subject: [Cerowrt-devel] Fwd: tcp wifi upload performance and lots of ACKs X-BeenThere: cerowrt-devel@lists.bufferbloat.net X-Mailman-Version: 2.1.13 Precedence: list List-Id: Development issues regarding the cerowrt test router project List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 04 Jun 2012 18:47:38 -0000 I was getting a bit more than this in the general case with the last cut of cerowrt. what are y'all getting with a good (300Mbit) link and various wifi cards? ---------- Forwarded message ---------- From: Ben Greear Date: Mon, Jun 4, 2012 at 7:29 PM Subject: tcp wifi upload performance and lots of ACKs To: netdev I'm going some TCP performance testing on wifi -> LAN interface connections. =A0With UDP, we can get around 250Mbps of payload throughput. =A0With TCP, max is about 80Mbps. I think the problem is that there are way too many ACK packets, and bi-directional traffic on wifi interfaces really slows things down. =A0(About 7000 pkts per second in upload direction, 2000 pps download. =A0And the vast majority of the downlo= ad pkts are 66 byte ACK pkts from what I can tell.) Kernel is 3.3.7+ Anyone know of any tuning parameters that would let the receiving socket wa= it a bit longer and send more ACK data in fewer packets? Packet traces and other info available if anyone wants to take a look. Thanks, Ben -- Ben Greear Candela Technologies Inc =A0http://www.candelatech.com -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@vger.kernel.org More majordomo info at =A0http://vger.kernel.org/majordomo-info.html --=20 Dave T=E4ht SKYPE: davetaht http://ronsravings.blogspot.com/