From owner-freebsd-net@FreeBSD.ORG Thu Apr 28 15:27:27 2011 Return-Path: Delivered-To: freebsd-net@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 675A6106566B for ; Thu, 28 Apr 2011 15:27:27 +0000 (UTC) (envelope-from kungfujesus06@gmail.com) Received: from mail-iw0-f182.google.com (mail-iw0-f182.google.com [209.85.214.182]) by mx1.freebsd.org (Postfix) with ESMTP id 251678FC12 for ; Thu, 28 Apr 2011 15:27:26 +0000 (UTC) Received: by iwn33 with SMTP id 33so3210685iwn.13 for ; Thu, 28 Apr 2011 08:27:26 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:date:from:to:cc:subject:message-id:references :mime-version:content-type:content-disposition:in-reply-to :user-agent; bh=yh5EdQS+KnjNGniRRD+P5vv6LtiABzlZd5ypyvI1r30=; b=RnKsuPsd9tRigZwJZVyT5fcG4y/0X3lEIIi+WM6ADsrTzQFxk8KdHYGk5TsOiT7URn 3nv+QAROATr1/GjI4R60lFevF+2u4kDxmO8D3trhw+y1I8dZvIQwFzkKvOVWolV9/bDJ NjSe2FVVFuXMi0C7LKQNEzFlUXtJiwFRE7V+w= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=date:from:to:cc:subject:message-id:references:mime-version :content-type:content-disposition:in-reply-to:user-agent; b=kLsuVMVKaSNhDAh7HmELVp8s9Xs4qdleVbPb845nkQ1TOaaEUGzlunqlPwmHc7sdOo 9xWKeO1aloRPIhYCkB+0VzA7XnmC7Sw1e1z8Y9VTg7irf4FSqSoTF/hH/o35wUDKQ009 sUfa6Faln+2Ot0yghhvIIkuKeawYE+pnDUHCw= Received: by 10.42.40.211 with SMTP id m19mr4316629ice.190.1304004446459; Thu, 28 Apr 2011 08:27:26 -0700 (PDT) Received: from ossumpossum.geop.uc.edu ([129.137.163.68]) by mx.google.com with ESMTPS id f28sm751365ibh.16.2011.04.28.08.27.24 (version=TLSv1/SSLv3 cipher=OTHER); Thu, 28 Apr 2011 08:27:25 -0700 (PDT) Date: Thu, 28 Apr 2011 11:27:40 -0400 From: Adam Stylinski To: Mike Tancsa Message-ID: <20110428152740.GB19362@ossumpossum.geop.uc.edu> References: <20110428072946.GA11391@zephyr.adamsnet> <4DB965D8.7090906@sentex.net> <20110428132922.GC2800@ossumpossum.geop.uc.edu> <4DB96DDD.4070801@sentex.net> <20110428141500.GE2800@ossumpossum.geop.uc.edu> <4DB97A07.2020606@sentex.net> <20110428150110.GG2800@ossumpossum.geop.uc.edu> <4DB985FC.4000704@sentex.net> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="tjCHc7DPkfUGtrlw" Content-Disposition: inline In-Reply-To: <4DB985FC.4000704@sentex.net> User-Agent: Mutt/1.5.21 (2010-09-15) Cc: freebsd-net@freebsd.org Subject: Re: em0 performance subpar X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 28 Apr 2011 15:27:27 -0000 --tjCHc7DPkfUGtrlw Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Thu, Apr 28, 2011 at 11:21:32AM -0400, Mike Tancsa wrote: > On 4/28/2011 11:01 AM, Adam Stylinski wrote: > >=20 > > ./netblast 192.168.0.121 5001 32768 30 > >=20 > > start: 1304002549.184689025 > > finish: 1304002579.187555311 > > send calls: 2163162 > > send errors: 2095950 > > approx send rate: 2240 > > approx error rate: 0 > >=20 > > ? This output is a bit cryptic but from what I think I understand from = the source code it's the number of successful sends of the payload size in = 30 seconds. =20 > >=20 > > So to do the math:=20 > > (32768*2210)/(1024*1024) > > 69.06250000000000000000MB/sec? This is still only saturating about hal= f the link speed. >=20 > Just to be clear, you have something listening on the other side on port > 5001 right ? ie on 192.168.0.121, you did a ./netreceive 5001... And > the payload is.... 32768 ?!? Try something that does not need > fragmentation and is within your max MTU. e.g. 500 byte frames should > saturate a gigabit link. >=20 > Watch it in real time with something like ifstat >=20 > ./netblast 192.168.0.121 5001 500 5 >=20 > ---Mike >=20 >=20 >=20 >=20 > --=20 > ------------------- > Mike Tancsa, tel +1 519 651 3400 > Sentex Communications, mike@sentex.net > Providing Internet services since 1994 www.sentex.net > Cambridge, Ontario Canada http://www.tancsa.com/ Listening with iperf on the other end. The receiving end is a Linux machin= e, but the code looks to be mainly portable socket code so let me compile n= etreceive on the linux box and give you the results. --=20 Adam Stylinski PGP Key: http://pohl.ececs.uc.edu/~adam/publickey.pub Blog: http://technicallyliving.blogspot.com --tjCHc7DPkfUGtrlw Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.17 (FreeBSD) iQIcBAEBAgAGBQJNuYdsAAoJED6sRHE6TvmnbAgQAM3Cp2FgAc2EQW1ZKBSNOOiK a6srQTqT8E+ajW9vYbL3ZVMSJ0NHGlVHH4VBJaAIB2yvLmbmELqIMp7Ko4Huww6U bppjOH81gnn4nlPFR31e4OpxeLP+Er0aZMZ6BdB54TvpG6SrdatZJN9MXoynjkCd QtjA8BwVDwR7okA2XGQQfCGAKVZTOTCoEo/1BezizLe2cdKo3SR3gOojJCPUQBDF wKP05KL8l5SsQN+gARnEPM9MbpsXR8Ye2qeKCT8lwlns27LJNSnq/A3YzTJQjT/R Ez+2DAL2bcvzQshesVIgr8qpaB0Min5hYcQvnm4RmDl78SUhvMtWliE2ms0AIoVm /4jhcojCqvKiTmLPRooTgjjUerLz6c3beKb/KDI4SnfuP6iqOaXJ+TLJa8H0ZAZV wfpXvP1eCa2cygMW2HpuirkPL7a+oZwmCJ6gj8y57LTbJ1fmvdYn1dhm2AuGibrx d1mD/LHfGPAswIHPreH93NhFdyeV/6IfhlslDn2nhgfkFqMbAFpTx4x5VEiU+lil vCoLAsZMQ13HSZTtaG/ehNyHvsn5nMPZ17OilDu7dqTHLY2Iv2GcnJ1Yva/xyo9M q6kzJc/GewkWKTsMzJHuQZzWXY2YmjCwaaOH6FLp3H1sHJFunsFRCrDL12RvqVf2 5XzZlP7DbD222aSdDpLr =5jgC -----END PGP SIGNATURE----- --tjCHc7DPkfUGtrlw--