Date: Thu, 28 Apr 2011 11:27:40 -0400 From: Adam Stylinski <kungfujesus06@gmail.com> To: Mike Tancsa <mike@sentex.net> Cc: freebsd-net@freebsd.org Subject: Re: em0 performance subpar Message-ID: <20110428152740.GB19362@ossumpossum.geop.uc.edu> In-Reply-To: <4DB985FC.4000704@sentex.net> 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>
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--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--
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