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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[-- Attachment #1 --] 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: > > int lazy_tx_credit_flush = 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 [-- Attachment #2 --] -----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-----
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