Date: Mon, 26 Oct 2015 14:38:04 +0000 From: "Pieper, Jeffrey E" <jeffrey.e.pieper@intel.com> To: "Eggert, Lars" <lars@netapp.com>, Kevin Oberman <rkoberman@gmail.com> Cc: "freebsd-net@freebsd.org" <freebsd-net@freebsd.org>, Daniel Engberg <daniel.engberg.lists@pyret.net> Subject: RE: ixl 40G bad performance? Message-ID: <2A35EA60C3C77D438915767F458D6568807F2A8A@ORSMSX111.amr.corp.intel.com> In-Reply-To: <0E4C2D93-FBAF-48CB-A704-499ABFC892B9@netapp.com> References: <5aae0ee63c44627223d5d179f1901d00@pyret.net> <CAN6yY1t9Tw0j=uwaw1GK47r5=F-zeuz2hps_Ez3Y_QC-QSAGKA@mail.gmail.com> <0E4C2D93-FBAF-48CB-A704-499ABFC892B9@netapp.com>
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-----Original Message----- From: owner-freebsd-net@freebsd.org [mailto:owner-freebsd-net@freebsd.org] = On Behalf Of Eggert, Lars Sent: Monday, October 26, 2015 2:28 AM To: Kevin Oberman <rkoberman@gmail.com> Cc: freebsd-net@freebsd.org; Daniel Engberg <daniel.engberg.lists@pyret.net= > Subject: Re: ixl 40G bad performance? On 2015-10-26, at 4:38, Kevin Oberman <rkoberman@gmail.com> wrote: > On Sun, Oct 25, 2015 at 12:10 AM, Daniel Engberg < > daniel.engberg.lists@pyret.net> wrote: >=20 >> One thing I've noticed that probably affects your performance benchmarks >> somewhat is that you're using iperf(2) instead of the newer iperf3 but I >> could be wrong... >=20 > iperf3 is not a newer version of iperf. It is a total re-write and a rath= er > different tool. It has significant improvements in many areas and new > capabilities that might be of use. That said, there is no reason to think > that the results of tests using iperf2 are in any way inaccurate. However= , > it is entirely possible to get misleading results if options not properly > selected. > >FWIW, I've been using netperf and tried various options. > >I don't think the issues is the benchmarking tool. I think the issue is TS= O/LRO issues (per my earlier email.) > >Lars With the latest ixl component from: https://downloadcenter.intel.com/downlo= ad/25160/Network-Adapter-Driver-for-PCI-E-40-Gigabit-Network-Connections-un= der-FreeBSD- running on 10.2 amd64, I easily get 9.6 Gb/s with one netperf stream, eithe= r b2b or through a switch. This is with no driver/kernel tuning. Running 4 = streams easily gets me 36 GB/s.=20 Jeff
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