On Tue, Aug 25, 2020 at 04:00:35PM +0000, David Laight wrote: > From: 'Marcelo Ricardo Leitner' > > Sent: 25 August 2020 16:41 > > > > On Tue, Aug 25, 2020 at 02:52:34PM +0000, David Laight wrote: > > > The genradix code is used by SCTP for accessing per-stream data. > > > This means there are quite a lot of lookups but the code wasn't > > > really optimised at all. > > > > My test box is down for the moment and will bring it on later today or > > tomorrow, so I can't test it yet. What should we expect as performance > > gains here? > > Not sure, probably not much, but it ought to show up :-) > There'll be bigger gains on a cpu that has software ilog2(). > > I've only checked SCTP still works. > I've requested 32k streams on a listener - to force a level-2 tree. > I've also done at least one check with a massive pad in the sctp > stream structure. Have you benchmarked at all? Or were you looking at the generated assembly?
