Date: Sat, 24 Oct 2015 08:45:53 +0000 From: "Eggert, Lars" <lars@netapp.com> To: Jack Vogel <jfvogel@gmail.com> Cc: Ian Smith <smithi@nimnet.asn.au>, Kevin Oberman <rkoberman@gmail.com>, "net@freebsd.org" <net@freebsd.org>, "jfv@FreeBSD.org" <jfv@freebsd.org>, Giuseppe Lettieri <g.lettieri@iet.unipi.it>, Eric Joyner <erj@freebsd.org>, Luigi Rizzo <rizzo@iet.unipi.it> Subject: Re: ixl 40G bad performance? Message-ID: <0998C63C-F7D9-44FE-A535-9E57EEF36C58@netapp.com> In-Reply-To: <CAFOYbcmJzyg%2BGLXgan75mgQECFJd6wyKUcOU_zn8WRi78p5L1g@mail.gmail.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> <20151023162337.L1149@besplex.bde.org> <CA%2Bb0zg92iMfLfRo%2BZBiMBnpBS_WBG==h3a3NCSXQGyeD7gio8A@mail.gmail.com> <0CFE1957-8FEB-4000-9E39-1F6A8983EFA6@netapp.com> <CAFOYbcmJzyg%2BGLXgan75mgQECFJd6wyKUcOU_zn8WRi78p5L1g@mail.gmail.com>
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--Apple-Mail=_4F86EABF-4DE1-40E3-B029-6FCBBAC8136F Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=us-ascii On 2015-10-24, at 10:32, Jack Vogel <jfvogel@gmail.com> wrote: > 13 on a 40G interface?? I don't think that's very good for Linux = either, is > this a 4x10 adapter? No, its's a 2x40. And I can get it into the high 30s with tuning. I just = mentioned the value to illustrate that something seems to be seriously = broken under FreeBSD. Lars > Maybe elaborating on the details of the hardware, you sure you don't = have a > bad PCI slot > somewhere that might be throttling everything? >=20 > Cheers, >=20 > Jack >=20 >=20 > On Sat, Oct 24, 2015 at 12:43 AM, Eggert, Lars <lars@netapp.com> = wrote: >=20 >> On 2015-10-23, at 23:36, Eric Joyner <erj@freebsd.org> wrote: >>=20 >> I see that the sysctl does clobber the global value, but have you = tried >> lowering the interval / raising the rate? You could try something = like >> 10usecs, and see if that helps. We'll do some more investigation here = -- >> 3Gb/s on a 40Gb/s using default settings is terrible, and we = shouldn't let >> that be happening. >>=20 >>=20 >> I played with different settings, but I've never been able to get = more >> than 4Gb/s, whereas under Linux 4.2 without any special settings I = get 13. >>=20 >> See my other email on TSO/LRO not looking to be effective; that would >> certainly explain it. Plausible? Anything to try here? >>=20 >> Lars >>=20 >>=20 > _______________________________________________ > freebsd-net@freebsd.org mailing list > https://lists.freebsd.org/mailman/listinfo/freebsd-net > To unsubscribe, send any mail to "freebsd-net-unsubscribe@freebsd.org" --Apple-Mail=_4F86EABF-4DE1-40E3-B029-6FCBBAC8136F 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----- iQCVAwUBVitFQdZcnpRveo1xAQi+jwP/cfm/zGSqsTHrF5vkIswsdufNTQw85FE8 gJ9ScG/vw+S6yKZQY2rNpXmZqCESY2g6vuNUacmDtgKh7z4FVg2WXwvucmhZITu5 fpTzTNOTrfmoYHoxVSXV6EPoqoeL9xwShmcWKIgc2+FGGTlfWzuSYmsVHSuGPryV sZEsEr3F/IY= =S1D+ -----END PGP SIGNATURE----- --Apple-Mail=_4F86EABF-4DE1-40E3-B029-6FCBBAC8136F--
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