Date: Thu, 12 Jul 2018 07:17:27 +0000 From: "Eggert, Lars" <lars@netapp.com> To: Navdeep Parhar <np@FreeBSD.org> Cc: "freebsd-net@freebsd.org" <freebsd-net@freebsd.org>, Giuseppe Lettieri <g.lettieri@iet.unipi.it> Subject: Re: netmap & chelsio Message-ID: <CBAC9E6A-1782-4CD8-938D-E11BED13F163@netapp.com> In-Reply-To: <c2ccab6a-bcd9-aa2d-5d8a-54f1ec8aeb24@FreeBSD.org> References: <94019926-B14F-47AB-8AD9-C01B4A0E199F@netapp.com> <20180705154710.GA3353@ox> <0199F257-F9D2-41D0-B4F9-26FBA1607F61@netapp.com> <20180706071739.GA13401@ox> <30D2A259-6B2E-44CA-969D-F51F4D929DDE@netapp.com> <c2ccab6a-bcd9-aa2d-5d8a-54f1ec8aeb24@FreeBSD.org>
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--Apple-Mail=_8088D43B-047C-45AC-BB96-101284DEC553 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=us-ascii Hi, On 2018-7-11, at 18:53, Navdeep Parhar <np@FreeBSD.org> wrote: > Try changing lazy_tx_credit_flush to 0 on the running kernel with a > debugger, or compile the driver with it set to 0 -- it's in = t4_netmap.c: >=20 > int lazy_tx_credit_flush =3D 1; thanks! With that, I get performance similar to the ixl cards on first = try. > I'm surprised I don't have a tunable/sysctl for it. I'll add one = really > soon. That would be useful! (Also useful would be some definite documentation on what all the loader = tunables are and what they do. But the current situation is already much = better than for the Intel cards, where esp. those that have been = iflib-ified seem to have completely undocumented tunables now.) General/unrelated suggestion: Could the kernel spit out a warning when = it encounters a loader tunable that doesn't do anything? That would = allow one to at least catch when tunables are renamed/changed. Lars --Apple-Mail=_8088D43B-047C-45AC-BB96-101284DEC553 Content-Transfer-Encoding: 7bit Content-Disposition: attachment; filename="signature.asc" Content-Type: application/pgp-signature; name=signature.asc Content-Description: Message signed with OpenPGP -----BEGIN PGP SIGNATURE----- iQIzBAEBCgAdFiEEmpq0ZpSoejRmyhheVLXDCb9wwVcFAltHAIYACgkQVLXDCb9w wVdoGxAA0lyKbOui4jb/F3ACJTMvuJTJLITq6VcXkdrtR4VpzuoB1MkNUXikCK6d Vdg9OJywJDBvk2j4hTOszxxgmmzmhsZANfXp3I4E/bMmZq8rAChhZSl8llcpZhYN TefiZ6u7gJSY9GCj0T5qMjyZfpDPkrp7HfuvkFQ5/0pSlfwanr0L4OonwVBsVG8S ksKXhXsaL3v977PbBwN0NNkHdvT/K+19n1tVVxMgiZaIb+NG0BbmYRT42MEI+pOg WZnDk8R8GfkTDAPQilNiTeAuyKPGqNKR06hKmO5AWedSC+2/wbCtRpyuEwm9eKnZ iKznr8Caxy9/Bgh+HdyeTMif5x3EZOP9XbuBjKeyHTDLAQgPmrLZNztbK+k6O47e R7v548MpdHqIAXBOu3b26jNASlSaE2NRnvJI7MbBaj67rNZ5Rfrp566IHdntSTlt 67S7Z0AcNYhAtJIzDDhraqXnAhXrP8nhJZG3zNAGLiLdnqiIxGLbrOOxLETIiEUb psf+qWDl3fRX89oo2mf9lsl25RcmcWQti13j0aDoo9RbFv86gB0nFq06S+KNaKgM gt5YYgK53kHfXkUTzDC9FII07yJ+YCZ+y8scsFDPQfT9SCrGs0fK9Xq9MdkHky+N 4yBMvROAzMdpnK6WUuJ/2NRheL/dnJOgq1SCdR0hSxKDfiCydCM= =ogZ5 -----END PGP SIGNATURE----- --Apple-Mail=_8088D43B-047C-45AC-BB96-101284DEC553--
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