From owner-freebsd-net@FreeBSD.ORG Wed Jan 9 15:00:37 2013 Return-Path: Delivered-To: freebsd-net@freebsd.org Received: from mx1.freebsd.org (mx1.FreeBSD.org [8.8.178.115]) by hub.freebsd.org (Postfix) with ESMTP id D5E24259 for ; Wed, 9 Jan 2013 15:00:37 +0000 (UTC) (envelope-from barney_cordoba@yahoo.com) Received: from nm1-vm4.bullet.mail.ne1.yahoo.com (nm1-vm4.bullet.mail.ne1.yahoo.com [98.138.91.161]) by mx1.freebsd.org (Postfix) with ESMTP id 8C0286B9 for ; Wed, 9 Jan 2013 15:00:37 +0000 (UTC) Received: from [98.138.90.48] by nm1.bullet.mail.ne1.yahoo.com with NNFMP; 09 Jan 2013 15:00:31 -0000 Received: from [98.138.89.164] by tm1.bullet.mail.ne1.yahoo.com with NNFMP; 09 Jan 2013 15:00:31 -0000 Received: from [127.0.0.1] by omp1020.mail.ne1.yahoo.com with NNFMP; 09 Jan 2013 15:00:31 -0000 X-Yahoo-Newman-Property: ymail-3 X-Yahoo-Newman-Id: 804445.26298.bm@omp1020.mail.ne1.yahoo.com Received: (qmail 26071 invoked by uid 60001); 9 Jan 2013 15:00:31 -0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=yahoo.com; s=s1024; t=1357743631; bh=8jkYnBnqZBBCBPwVeqqZUIzWH7fjSeD5svQFjcnIxb8=; 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=4ywqNQ4T3DTwqDe59INXMqNMuese03Bub2JchPDXfj37eO6W8eVzaFnBJW0r2LuHIWtQ14s5BfrA3iBqOwYaRv5MWMq832F+ielhMfWg/qO1i/y8YMLcJM432ued6HWJ8FD1VyARVSyyYx18ItmIYtHaBEHacvdQ9+vHatF8xXE= 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=XqUV4hGvacjqfEjW53GEmxytonQF2SwRbHOUs652DAkaMYGSiWLaQnDSLeGwVgc1yb/wrRqZ1G72dDg36HS+3qbVRHCbX/f9i1cDyqnr6p6FgjrlcV0JC/BSwzfOzIHm1FHJqt7ZXamEjrgYuQF7TQTGJdtBOJmXNFZLyotjSNE=; X-YMail-OSG: f__xyq0VM1nNy0d58U6vlO0D_BOoiZKLTybhFD9adhfbHRn tYEJW6pbDfKapKf8ma_ScMjgBzZUC0x4xPBG79NHsuUzaDclBc.H5lWr7uW0 WRjNwmsPSPsRMZeU1SHu_27ttt2QN8BDWNtCaVMzsjxBbrhefzqPYdnQ7iZJ 3HsaBiyPftKIr4kn7v2en0lMtAYXzCXSqmqWNwkanvvDnNayR8bMLP4qdo9G ZFZCJKeXoOjmHMPwJks6RGsK7FRvNdgpUqaLgn8gsBL3.wHoFnvD5Kpr1KbV 6SOpGW8xmqJSjS.v4M5JpwJq6ASMd34VRXwSKACDshDyygzhgALABRBQiRm8 UUMAc4gQvAr9zv_92AsVLOjAp4NjQvUCNljs.w0tD0Vv9uL8lUDGaQBoPxmy PGhyHCX4ULiVrC8KK2o9MQQ3RWAX5I4E.O25XsGzEdAl4BthmU3rG09L9LsO qEMDWgC6Tx39hsnX.anTFp1bJn2PV13q4K4fdS16TS4LlMeIBwOArYFqirVH RzEMoBgINLd5HqKCX7a_dCEtcVs_qFw-- Received: from [174.48.128.27] by web121605.mail.ne1.yahoo.com via HTTP; Wed, 09 Jan 2013 07:00:31 PST X-Rocket-MIMEInfo: 001.001, CgotLS0gT24gV2VkLCAxLzkvMTMsIHN0aGF1Z0BuZXRoZWxwLm5vIDxzdGhhdWdAbmV0aGVscC5ubz4gd3JvdGU6Cgo.IEZyb206IHN0aGF1Z0BuZXRoZWxwLm5vIDxzdGhhdWdAbmV0aGVscC5ubz4KPiBTdWJqZWN0OiBSZTogVG8gU01QIG9yIG5vdCB0byBTTVAKPiBUbzogZXJpY2hzZnJlZWJzZGxpc3RAYWxvZ3QuY29tCj4gQ2M6IGJhcm5leV9jb3Jkb2JhQHlhaG9vLmNvbSwgZnJlZWJzZC1uZXRAZnJlZWJzZC5vcmcsIGphY2sudm9nZWxAZ21haWwuY29tLCBhdGtpbjkwMUBnbWFpbC5jb20KPiBEYXRlOiABMAEBAQE- X-Mailer: YahooMailClassic/15.1.2 YahooMailWebService/0.8.130.494 Message-ID: <1357743631.24911.YahooMailClassic@web121605.mail.ne1.yahoo.com> Date: Wed, 9 Jan 2013 07:00:31 -0800 (PST) From: Barney Cordoba Subject: Re: To SMP or not to SMP To: erichsfreebsdlist@alogt.com, sthaug@nethelp.no In-Reply-To: <20130109.153249.41633097.sthaug@nethelp.no> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: freebsd-net@freebsd.org, jack.vogel@gmail.com, atkin901@gmail.com 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: Wed, 09 Jan 2013 15:00:37 -0000 --- On Wed, 1/9/13, sthaug@nethelp.no wrote: > From: sthaug@nethelp.no > Subject: Re: To SMP or not to SMP > To: erichsfreebsdlist@alogt.com > Cc: barney_cordoba@yahoo.com, freebsd-net@freebsd.org, jack.vogel@gmail.com, atkin901@gmail.com > Date: Wednesday, January 9, 2013, 9:32 AM > > > 4BSD runs pretty well with > an SMP kernel. I can test ULE and compare > > > easily. A no SMP kernel is problematic as the igb > driver doesn't seem > > > to work and my onboard NICs are, sadly, igb. > > > > > this is bad luck. I know of the kernels as I have had > SMP and single > > CPU machines since 4.x times. > > I have had igb working with both SMP and non-SMP kernel for > at least a > year or two, 8.x-STABLE. No specific problems. > > Steinar Haug, Nethelp consulting, sthaug@nethelp.no > Maybe a problem with "legacy interrupts" on more modern processors? I'm using an E5520 and while the NIC inits ok, it just doesnt seem to gen interrupts. I can't spend much time debugging it.... I notice that HAMMER kernels use MSI/X interrupts whether SMP is enabled or not, while i386 kernels seem to require APIC. Is there some physical reason for this? BC