Date: Wed, 21 Oct 2015 12:25:59 +0000 From: "Eggert, Lars" <lars@netapp.com> To: Bruce Evans <brde@optusnet.com.au> Cc: 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: <12938D48-44B9-456A-AD7C-630D7E09BB35@netapp.com> In-Reply-To: <20151020232218.G1833@besplex.bde.org> 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>
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--Apple-Mail=_0220844F-3D93-4781-B1B5-E7999C199CB0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=us-ascii 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: >=20 > 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 --Apple-Mail=_0220844F-3D93-4781-B1B5-E7999C199CB0 Content-Transfer-Encoding: 7bit Content-Disposition: attachment; filename="signature.asc" Content-Type: application/pgp-signature; name="signature.asc" Content-Description: Message signed with OpenPGP using GPGMail -----BEGIN PGP SIGNATURE----- iQCVAwUBVieEVdZcnpRveo1xAQh9egQAqxX1TeZj7SMuFuecd2js5ODhooofXz7w V8yXFQgjeK6MzthBqlr4jK+LA1osZOWcLIzfXxlIXPYb1MhG5Ei8QMGCH2ZW7B9b Wzu6yavZovncQc/tC89ZfETqTTalqXueCH3vsXlcItvbefuszekBjhBsc+b4LM6I X0jIObpPXho= =EdNi -----END PGP SIGNATURE----- --Apple-Mail=_0220844F-3D93-4781-B1B5-E7999C199CB0--
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