Date: Fri, 11 Dec 2015 07:20:47 +0000 From: "Eggert, Lars" <lars@netapp.com> To: Denis Pearson <dennix.pearson@gmail.com> Cc: Adrian Chadd <adrian.chadd@gmail.com>, "Pieper, Jeffrey E" <jeffrey.e.pieper@intel.com>, Kevin Oberman <rkoberman@gmail.com>, "Daniel Engberg" <daniel.engberg.lists@pyret.net>, "freebsd-net@freebsd.org" <freebsd-net@freebsd.org> Subject: Re: ixl 40G bad performance? Message-ID: <72184809-0507-4927-BCA3-22ACC126FA50@netapp.com> In-Reply-To: <CAFC3-mTLmFijXNBdu_HKn2Q=AMLUAVH1AwZJ=XD=yMwSPX--dQ@mail.gmail.com> References: <5aae0ee63c44627223d5d179f1901d00@pyret.net> <CAN6yY1t9Tw0j=uwaw1GK47r5=F-zeuz2hps_Ez3Y_QC-QSAGKA@mail.gmail.com> <0E4C2D93-FBAF-48CB-A704-499ABFC892B9@netapp.com> <2A35EA60C3C77D438915767F458D6568807F2A8A@ORSMSX111.amr.corp.intel.com> <99E53825-99F8-4E82-A710-6BC07B123F77@netapp.com> <2A35EA60C3C77D438915767F458D6568807F2D52@ORSMSX111.amr.corp.intel.com> <A546ABEA-D495-461F-9441-31F70AACC146@netapp.com> <E21A5504-7780-4D84-AA5B-7A3F6F968FC7@netapp.com> <CAFC3-mQ2d1GKCRCEF8%2BC-u1-EVy094w0zCDv7QHeYnaHK-NHrw@mail.gmail.com> <CAJ-Vmo=cQQjfKhKB_D6Uc2e9TPnQwK2EXBka_sACwCkOCdYvgA@mail.gmail.com> <CAFC3-mTLmFijXNBdu_HKn2Q=AMLUAVH1AwZJ=XD=yMwSPX--dQ@mail.gmail.com>
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--Apple-Mail=_FAB4E4D4-EEAE-4D68-83E1-37F9E972C1BD Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=us-ascii Hi, On 2015-12-10, at 20:42, Denis Pearson <dennix.pearson@gmail.com> wrote: > I can probably find out a snapshot with the code at the time and = extract a diff, yes. I just don't know how it worths wasting the time = when the problem is not reproducible on the current 1.4.8 driver which = will hopefully get into -CURRENT (if it's not already there?). per my last email, I do see the same issues with 1.4.8. This is with a single netperf TCP flow, no NIC parameter tuning and no = RSS or PCBGROUP in the kernel. > This is why I suggested a transceiver change or replug first. I will test this next week. (However, the same testbed booted into Linux = doesn't see these low netperf numbers.) It really smells like a TSO/LRO (=3D packet rate) issue. If I configure = jumbograms, performance jumps up as expected. Lars --Apple-Mail=_FAB4E4D4-EEAE-4D68-83E1-37F9E972C1BD 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----- iQIcBAEBCAAGBQJWanlNAAoJEFS1wwm/cMFXkQoP/19pmIvjixR89hhSoirGzA2P 7/KsOmPqMlKuuohy0y4pGL6VgBfl1y0E2zsngfE0lkbFfcCUUgegq5p553hO1+vH adQF3UdOTm5fo1X6NOAWhkToIJf1T3X9N8KUhhZ3gy+eUV9nt1nCzA0E3kLdI68T 8eQCS/N1c13HEl1NCMi0Hri6yQJaAqmQHjp/vfMKaNtNYkn1cVlxealfqqSoVPY4 BgKBrTSAspETOKsd0SEZXubd43Apbg5av9V/BGuKF4gpO9EYVSemZFmBgXtGVEbs s+oyR1ROhWrOz2r4IG4uxQodI3WHhgSXc5GV0L+fSXxmM9iqchT8jAnvfXV3iDkQ I38zC3csNtuaMNVy99AjoWd2O1jDnBJQT7KMdZeufxjJqEGVgU49lsA3TEdh/6uL tC/xwNlaaxBo99ClBnXLOLrVAsmsLvTRzNx7QjjSMruUOFtxfbOhBvyfcVLcFeTv XoBcv6HTREd3HKrGgBr/xBJgc7qvZlAIedx9YFhtJ3yoaraWIYyBMexSLgiClABn tE7+sdgfa1VaIdfJGrVkt1GrUlOA78z/iOxvdi1JYD6H18ux4msY8CH54ATcViZd ZUTjj0j+/u8GdtS9+gWlL+o3EMbbiSFTbkignC02Ngn51Kb7R69/iOf4x/c4csSx e0AYBhcRjx9XAtzcjzpq =nCz1 -----END PGP SIGNATURE----- --Apple-Mail=_FAB4E4D4-EEAE-4D68-83E1-37F9E972C1BD--
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