Date: Thu, 28 Apr 2011 11:35:39 -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: <20110428153539.GC19362@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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[-- Attachment #1 --] On Thu, Apr 28, 2011 at 11:21:32AM -0400, Mike Tancsa wrote: > On 4/28/2011 11:01 AM, Adam Stylinski wrote: > > > > ./netblast 192.168.0.121 5001 32768 30 > > > > start: 1304002549.184689025 > > finish: 1304002579.187555311 > > send calls: 2163162 > > send errors: 2095950 > > approx send rate: 2240 > > approx error rate: 0 > > > > ? 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. > > > > So to do the math: > > (32768*2210)/(1024*1024) > > 69.06250000000000000000MB/sec? This is still only saturating about half the link speed. > > 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. > > Watch it in real time with something like ifstat > > ./netblast 192.168.0.121 5001 500 5 > > ---Mike > > > > > -- > ------------------- > 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/ k so during the transmission ifstat reported: 0.53 44266.87 0.23 62788.56 0.06 62774.17 0.00 62774.26 0.00 62774.95 0.40 19482.25 And the rate output of netblast (using as suggested the parameters above): 119091 This is about 454mbps. Still way slower than it ought to be. -- Adam Stylinski PGP Key: http://pohl.ececs.uc.edu/~adam/publickey.pub Blog: http://technicallyliving.blogspot.com [-- Attachment #2 --] -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.17 (FreeBSD) iQIcBAEBAgAGBQJNuYlKAAoJED6sRHE6TvmnCmwQAI3OnXy4q1x+dzxDGOrbSbcG D2nz9rEn94nsud+k+8CvNB/1GAlQ5HU+IgASeUISRbMQ6ewzVcOTT/eECtCiZF8g azuFS0Feliq0x5VsVs3iydX4i0uUIQt824y9m+1B32pupB0PABhoWyEzxCGVXzo/ tfIBNVohPR7i1g1+LfKKb3DfNQAJh2ZndCdZ3LvFfRFa+VtesBucAKy6W/EbclHR 3AlFHCcZLYhGCCrcH6h6xAgyTaG2kXY7GKmBZUJwu89FswwAQbBPJBrznDE8R3hm ZVq7xAf/v/x06DuezR4HKxCCmBuN7FD0XTXJWPm/de0ZFSAdbr9GLI9vpRg8NX7a OxopCYQy9mMt9afxyZPosVQgN+698i75MxgCQKK2ZrGW1zM/fe09sJlJ9JVpPDyJ wUekYYF/1pvA9iqSiIdASv/0GB0k04filrryiirWEiu36rDy5InJca+49614xg3T T0jwYcBgkmwuV2NVjZqYD8rvnAiANOTohKhmGJqp48Lypkpd8MVyzZzCZFR50qg1 M9Z6ccTFymn5Uap+K3LBS5v8jmJwFl+1nitHnfl/UVpzm1vrXCWy2US1Gi2yoRVV WI69lx0kOlMhGw41eP25lSGa+XBpUaDMgjJM9lvrR5jdQqwWKsAyrir3W0EeCQzL f4RH1Oj7gL3r4jZoc9ij =ake4 -----END PGP SIGNATURE-----home | help
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