> On Sep 1, 2015, at 9:47 AM, Matthew Hall <mhall at mhcomputing.net> wrote: > > On Tue, Sep 01, 2015 at 04:37:18PM +0200, Martin Dra?ar wrote: >> Dne 1.9.2015 v 15:45 De Lara Guarch, Pablo napsal(a): >>> 82574L NIC uses em PMD, which does not support more than 1 queue. >>> Therefore RSS is disabled in the NIC and then you cannot have RSS hashes. >>> >>> Thanks, >>> Pablo >> >> Hi Pablo, >> >> that is an interesting information. I read the rationale in em_ethdev.c >> and I was wondering, what would have to be done to enable RSS hash >> computation on that card. I can live with just one RX queue, but hashes >> would help me a lot. The computer which is using those NICs is not that >> powerful and every bit of offloaded computation counts... >> >> Thanks, >> Martin > > RSS calculations are used to direct packets across multiple RX queues. With > only one RX queue it cannot possibly increase performance by enabling it.
Well, there are other things you could use that hw-provided hash for? (but point-taken)
