From: Florian Westphal <fw@strlen.de>
To: Pablo Neira Ayuso <pablo@netfilter.org>
Cc: "Stefano Brivio" <sbrivio@redhat.com>,
"Phil Sutter" <phil@nwl.cc>, "Florian Westphal" <fw@strlen.de>,
netfilter-devel@vger.kernel.org,
"Kadlecsik József" <kadlec@blackhole.kfki.hu>,
"Eric Garver" <eric@garver.life>,
"Sabrina Dubroca" <sd@queasysnail.net>,
"Jay Ligatti" <ligatti@usf.edu>,
"Ori Rottenstreich" <or@cs.technion.ac.il>,
"Kirill Kogan" <kirill.kogan@gmail.com>
Subject: Re: [PATCH nf-next 8/8] nft_set_pipapo: Introduce AVX2-based lookup implementation
Date: Thu, 21 Nov 2019 21:46:12 +0100 [thread overview]
Message-ID: <20191121204612.GM20235@breakpoint.cc> (raw)
In-Reply-To: <20191121202232.e6enl4ck7ynjekty@salvia>
Pablo Neira Ayuso <pablo@netfilter.org> wrote:
> Probably, at some point we can start exposing knobs, but I'd rather
> see a bit more discussions on how to provide a good autotuning. By
> exposing all knobs, then such discussion might not ever happen?
My remarks were not aimed at exposing knobs but to provide some
debugging aid.
Say e.g. there is a bug in the avx implementation that isn't present
in the C version, or vice versa. Or in rhashtable but not hashtable.
Right now it requires some guesswork to figure out what set backend is
actually used for @myset, and it might make things easier for debugging
if one could query the kernel for some information wrt. what set backend
is used. I would try to avoid to expose anything that can't be ripped
out again, so e.g. names or even just %pF of ->lookup() would perhaps be
enough.
next prev parent reply other threads:[~2019-11-21 20:46 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-11-19 1:06 [PATCH nf-next 0/8] nftables: Set implementation for arbitrary concatenation of ranges Stefano Brivio
2019-11-19 1:06 ` [PATCH nf-next 1/8] nf_tables: Support for subkeys, set with multiple ranged fields Stefano Brivio
2019-11-19 1:06 ` [PATCH nf-next 2/8] bitmap: Introduce bitmap_cut(): cut bits and shift remaining Stefano Brivio
2019-11-19 1:06 ` [PATCH nf-next 3/8] nf_tables: Add set type for arbitrary concatenation of ranges Stefano Brivio
2019-11-20 15:06 ` Florian Westphal
2019-11-21 19:54 ` Stefano Brivio
2019-11-21 20:41 ` Florian Westphal
2019-11-21 21:00 ` Stefano Brivio
2019-11-22 13:39 ` Stefano Brivio
2019-11-19 1:06 ` [PATCH nf-next 4/8] selftests: netfilter: Introduce tests for sets with range concatenation Stefano Brivio
2019-11-19 1:06 ` [PATCH nf-next 5/8] nft_set_pipapo: Provide unrolled lookup loops for common field sizes Stefano Brivio
2019-11-19 1:06 ` [PATCH nf-next 6/8] nft_set_pipapo: Prepare for vectorised implementation: alignment Stefano Brivio
2019-11-19 1:06 ` [PATCH nf-next 7/8] nft_set_pipapo: Prepare for vectorised implementation: helpers Stefano Brivio
2019-11-19 1:06 ` [PATCH nf-next 8/8] nft_set_pipapo: Introduce AVX2-based lookup implementation Stefano Brivio
2019-11-20 15:16 ` Florian Westphal
2019-11-20 16:08 ` Phil Sutter
2019-11-21 19:55 ` Stefano Brivio
2019-11-21 20:22 ` Pablo Neira Ayuso
2019-11-21 20:46 ` Florian Westphal [this message]
2019-11-21 20:54 ` Pablo Neira Ayuso
2019-11-21 20:56 ` Pablo Neira Ayuso
2019-11-21 20:51 ` Pablo Neira Ayuso
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