Date: Wed, 21 Oct 2015 07:14:49 -0700 From: Jack Vogel <jfvogel@gmail.com> To: "Eggert, Lars" <lars@netapp.com> Cc: Bruce Evans <brde@optusnet.com.au>, Ian Smith <smithi@nimnet.asn.au>, Kevin Oberman <rkoberman@gmail.com>, "net@freebsd.org" <net@freebsd.org>, "jfv@FreeBSD.org" <jfv@freebsd.org>, "ricera10@gmail.com" <ricera10@gmail.com>, Luigi Rizzo <rizzo@iet.unipi.it>, Giuseppe Lettieri <g.lettieri@iet.unipi.it> Subject: Re: ixl 40G bad performance? Message-ID: <CAFOYbcnY0DjCYE4vP_o7uU2KP0dHJZe7wWu8TCQ5XPMA0eohfg@mail.gmail.com> In-Reply-To: <12938D48-44B9-456A-AD7C-630D7E09BB35@netapp.com> References: <79830D9D-94E6-47A9-92B9-D63DF5432272@netapp.com> <CA%2BhQ2%2Bj5PkmRWe-ydahExfvOj%2BzestFEn%2B5DZ9_acG2Z_v=8_w@mail.gmail.com> <C81B629B-67D5-4E5B-A215-452E837BE673@netapp.com> <CA%2BhQ2%2BiGk5Bx5mZ8v7K9cPdiNcJgBz99kmP8=twFnETw-bi2vw@mail.gmail.com> <CAN6yY1uZJ5MhMdXLGy7REk8i6Z%2BjgJwMXFSu899%2BQwVaz%2BvP4w@mail.gmail.com> <20151020190541.B15983@sola.nimnet.asn.au> <6CD6754D-FC0E-4B24-AAEC-7C9D68284141@netapp.com> <20151020232218.G1833@besplex.bde.org> <12938D48-44B9-456A-AD7C-630D7E09BB35@netapp.com>
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The 40G hardware is absolutely dependent on firmware, if you have a mismatch for instance, it can totally bork things. So, I would work with your Intel rep and be sure you have the correct version for your specific hardware. Good luck, Jack On Wed, Oct 21, 2015 at 5:25 AM, Eggert, Lars <lars@netapp.com> wrote: > Hi Bruce, > > thanks for the very detailed analysis of the ixl sysctls! > > On 2015-10-20, at 16:51, Bruce Evans <brde@optusnet.com.au> wrote: > > > > Lowering (improving) latency always lowers (unimproves) throughput by > > increasing load. > > That, I also understand. But even when I back off the itr values to > something more reasonable, throughput still remains low. > > With all the tweaking I have tried, I have yet to top 3 Gb/s with ixl > cards, whereas they do ~13 Gb/s on Linux straight out of the box. > > Lars >
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