From owner-freebsd-net@FreeBSD.ORG Mon Dec 31 15:54:00 2012 Return-Path: Delivered-To: freebsd-net@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id 07F5EFAC for ; Mon, 31 Dec 2012 15:54:00 +0000 (UTC) (envelope-from barney_cordoba@yahoo.com) Received: from nm9-vm4.bullet.mail.ne1.yahoo.com (nm9-vm4.bullet.mail.ne1.yahoo.com [98.138.91.169]) by mx1.freebsd.org (Postfix) with ESMTP id A63CE8FC08 for ; Mon, 31 Dec 2012 15:53:59 +0000 (UTC) Received: from [98.138.90.57] by nm9.bullet.mail.ne1.yahoo.com with NNFMP; 31 Dec 2012 15:53:58 -0000 Received: from [98.138.88.233] by tm10.bullet.mail.ne1.yahoo.com with NNFMP; 31 Dec 2012 15:53:58 -0000 Received: from [127.0.0.1] by omp1033.mail.ne1.yahoo.com with NNFMP; 31 Dec 2012 15:53:58 -0000 X-Yahoo-Newman-Property: ymail-3 X-Yahoo-Newman-Id: 496810.29906.bm@omp1033.mail.ne1.yahoo.com Received: (qmail 2436 invoked by uid 60001); 31 Dec 2012 15:53:58 -0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=yahoo.com; s=s1024; t=1356969238; bh=OSrvDAOaJxdg5diqhrSdrPutX8M3/VFWb4GRFqEpljA=; h=X-YMail-OSG:Received:X-Rocket-MIMEInfo:X-Mailer:Message-ID:Date:From:Subject:To:Cc:In-Reply-To:MIME-Version:Content-Type; b=I/rniWgZq8tUnzwdRsfsDvnuekhuiAl1iSh1yLzGlgnUH+CDl4sIpRSnFXsXxk7Sg8QaoZz3i40T1U9J9L3d/DCEQChgOlFBoBaYvma22n8R+9AHUGaJAWHrCGZ56CwbRZn3cFtX9K4fDrjnl5wdfln7HRkaldaxEEatqRxmzjE= DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=s1024; d=yahoo.com; h=X-YMail-OSG:Received:X-Rocket-MIMEInfo:X-Mailer:Message-ID:Date:From:Subject:To:Cc:In-Reply-To:MIME-Version:Content-Type; b=HRe4bQuj/OAkC+WH6ncf5HvGmy8yEoepzhVibpFdrYKz8cyCZhLeDL8MS1gfEbemtTh+YAQYzJRAKxlbn278THzueCdmQRmWOnE+hgTneWNbjFb1zGjyK+Dem/W6w7UaNepG7ND2sMooJZbq+mLsLqzFph9TvQguE6Hb4u5lJCU=; X-YMail-OSG: A0P2x60VM1ml5w4q4bdksB0nqUaq6YgzTuVAEe3RMGj0vcV Y5rO39a_Gxo.s1fx6acq3wGS0LK9FCzesBUiieNzpzSoqVcJbvus2NBMdRt0 RjKkAmZvRO4CBmwCfzy0gLGkAF6aolm35hAJTIrts9bu_L8jiEgclWAcZGNa L_0IzKj5eInj5rfh2Z.t69fvy96fiAPhgB_lcHSNeEpfR0_XZNFzV1GsssXd QeDTsOaNzQeOo9dTRU8L6xp8KJSji3O_tKUWSGGJMM1P48iex.iwIp8s9.xn LPFkyCgSggTJez2bmPdoTKI6dxUVR6ngnGGb.D.oYGJuCeAVn4kTp2EWCrcz 4gEks1FaBHaQor.M6SWgq_KB8HoNks93rCM9_KctG2Ej57enUEXAAusidYdm lj5hMCwURGIX3r9mppy5xAXkd8uxhtEygGDH7Ucw.msGiIWGV1dttCDXljks 5dEkIL86VU0.tGcOHdsU8ppuQqcxe51xNsqHlO_G4ryyhXv.pZVyFLB0hTv8 Lc3PUlC9l1TaL1elx_m4ZmxquI_hpEmdOUNflM8ad45_rdIQqVqULzNaPxKB U7V353Fu9a9hKY7bWKiYLL.jrNkL0tvS_3CSbAUJSpOSsGwn4l4HL8kA0Rzu pULUsJE1LvnUAYi9D2fo- Received: from [174.48.128.27] by web121602.mail.ne1.yahoo.com via HTTP; Mon, 31 Dec 2012 07:53:58 PST X-Rocket-MIMEInfo: 001.001, CgotLS0gT24gTW9uLCAxMi8zMS8xMiwgbGluaW1vbkBGcmVlQlNELm9yZyA8bGluaW1vbkBGcmVlQlNELm9yZz4gd3JvdGU6Cgo.IEZyb206IGxpbmltb25ARnJlZUJTRC5vcmcgPGxpbmltb25ARnJlZUJTRC5vcmc.Cj4gU3ViamVjdDogUmU6IGtlcm4vMTc0ODUxOiBbYnhlXSBbcGF0Y2hdIFVEUCBjaGVja3N1bSBvZmZsb2FkIGlzIHdyb25nIGluIGJ4ZSBkcml2ZXIKPiBUbzogbGluaW1vbkBGcmVlQlNELm9yZywgZnJlZWJzZC1idWdzQEZyZWVCU0Qub3JnLCBmcmVlYnNkLW5ldEBGcmVlQlNELm9yZwo.IEQBMAEBAQE- X-Mailer: YahooMailClassic/15.1.2 YahooMailWebService/0.8.129.483 Message-ID: <1356969238.85857.YahooMailClassic@web121602.mail.ne1.yahoo.com> Date: Mon, 31 Dec 2012 07:53:58 -0800 (PST) From: Barney Cordoba Subject: Re: kern/174851: [bxe] [patch] UDP checksum offload is wrong in bxe driver To: linimon@FreeBSD.org In-Reply-To: <201212310728.qBV7SPKC064686@freefall.freebsd.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: freebsd-net@freebsd.org X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 31 Dec 2012 15:54:00 -0000 --- On Mon, 12/31/12, linimon@FreeBSD.org wrote: > From: linimon@FreeBSD.org > Subject: Re: kern/174851: [bxe] [patch] UDP checksum offload is wrong in bxe driver > To: linimon@FreeBSD.org, freebsd-bugs@FreeBSD.org, freebsd-net@FreeBSD.org > Date: Monday, December 31, 2012, 2:28 AM > Old Synopsis: UDP checksum offload is > wrong in bxe driver > New Synopsis: [bxe] [patch] UDP checksum offload is wrong in > bxe driver > > Responsible-Changed-From-To: freebsd-bugs->freebsd-net > Responsible-Changed-By: linimon > Responsible-Changed-When: Mon Dec 31 07:28:11 UTC 2012 > Responsible-Changed-Why: > Over to maintainer(s). > > http://www.freebsd.org/cgi/query-pr.cgi?pr=174851 > _______________________________________________ > freebsd-net@freebsd.org > mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-net > To unsubscribe, send any mail to "freebsd-net-unsubscribe@freebsd.org" > Has anyone done an analysis on modern hardware as to whether udp csum offloading is actually beneficial? Even on 2007 hardware I came to the conclusion that using offloading was a negative. Reminds me of the days when people were using "intelligent" ethernet cards that were slower than the host cpu. The handshaking cost you more than just using shared memory. BC