Date: Thu, 28 Apr 2011 12:09:19 -0400 From: Adam Stylinski <kungfujesus06@gmail.com> To: Steven Hartland <killing@multiplay.co.uk> Cc: freebsd-net@freebsd.org Subject: Re: em0 performance subpar Message-ID: <20110428160919.GE19362@ossumpossum.geop.uc.edu> In-Reply-To: <11659E32824B4B1E91B6B219BDEF1234@multiplay.co.uk> References: <20110428072946.GA11391@zephyr.adamsnet> <4DB965D8.7090906@sentex.net> <B04EE072E7F04402AC289EFBF55E1D05@multiplay.co.uk> <20110428141339.GD2800@ossumpossum.geop.uc.edu> <EE019B72D65E417BABD7022E4DF10357@multiplay.co.uk> <20110428144513.GF2800@ossumpossum.geop.uc.edu> <41EE7AB832F24194AC8730544E1C2EB7@multiplay.co.uk> <20110428152141.GA19362@ossumpossum.geop.uc.edu> <11659E32824B4B1E91B6B219BDEF1234@multiplay.co.uk>
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[-- Attachment #1 --] On Thu, Apr 28, 2011 at 04:29:42PM +0100, Steven Hartland wrote: > Try using a large buffer size on iperf and check the flow control options on the switch. > > ----- Original Message ----- > From: "Adam Stylinski" <kungfujesus06@gmail.com> > Just using the default settings with iperf. Netblast is giving me similar results. Disabling TCP checksum offloading (transmit > and receive) and large receive offload have zero effect. > > -- > Adam Stylinski > PGP Key: http://pohl.ececs.uc.edu/~adam/publickey.pub > Blog: http://technicallyliving.blogspot.com > > > > > ================================================ > This e.mail is private and confidential between Multiplay (UK) Ltd. and the person or entity to whom it is addressed. In the event of misdirection, the recipient is prohibited from using, copying, printing or otherwise disseminating it or any information contained in it. > > In the event of misdirection, illegible or incomplete transmission please telephone +44 845 868 1337 > or return the E.mail to postmaster@multiplay.co.uk. > [adam@nasbox ~]$ iperf -m -w 1677216 -l1M -c 192.168.0.121 ------------------------------------------------------------ Client connecting to 192.168.0.121, TCP port 5001 TCP window size: 1.60 MByte (WARNING: requested 1.60 MByte) ------------------------------------------------------------ [ 3] local 192.168.0.60 port 24761 connected with 192.168.0.121 port 5001 [ ID] Interval Transfer Bandwidth [ 3] 0.0-10.0 sec 694 MBytes 581 Mbits/sec [ 3] MSS size 8192 bytes (MTU 8232 bytes, unknown interface) Switch is unmanaged, options are non-existent. -- 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) iQIcBAEBAgAGBQJNuZEvAAoJED6sRHE6TvmnK7cP/3W64kjIRgi9VHhdTql0dBck ifTEwRb2GoPqJOZbFMwxFkKHI3lWsxGXDldMFuiN6bS0+73SDd7fCho/g3RC/KZg Cx4JoRtpm+vIRPHOWh8iYFMtOWCF1Fof3L8KFX1y1IQB1qvg3jZAFse3IoZgoaK8 s9vEdVCQ/kGApulNmk9mZar7FjyZlOwAL4T1Y6HszAxidrmJDaB6qUhEUnNZVG4o luMs0CzmJYFlGP9dl+MQY9UF5fdJ3qVAtPjQhqHKUKVIBEzo3yEqZa0gHilcAYKq JEBwRYh/dfZbRY6/wRzEVxAU48W/pBaMWPyYo2H4g4rYcuerCHgDnTqL0h8QsB0m 76k1JBTNhQ4JtNEy7txFUmv03f1HxGMAxvgPYFitNJETTMsJ3JlfghicoS3hwh80 gmOgIma+DDvf5o4jsG3B4KvmHeTyDjKrhOJKvzx5CaS+WtfhVmr2sqJGyTJu6Zfa wjWA2KTHwHj49tkD6heEuLsTVmyLtuxm4O+m/HEeEzcYa+Z1pfdGYAJm2cLT9Rs4 ISF78WsXTYbaH4EulHnz5plX3IFxnBIYAfh8ZrZRrQCPIx7VHVY3H2Zis5WcHFUp OhKUxyWQvOvEDKnGrwqAItD6UjDI9ocNMRVAFyvbK2CrurL1ei5FTu7Ouu88nM34 5+6ZOYcyq2aR7+4joPXi =gCvp -----END PGP SIGNATURE-----
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