On 07/31/2011 11:56 AM, am1463 wrote: > On Wed, Jul 27, 2011 at 7:13 PM, Alexander Duyck > <[email protected]> wrote: >> Gorgos, >> >> I would recommend looking at some patches I had submitted as an RFC back in >> December. >> >> http://patchwork.ozlabs.org/patch/76051/ >> http://patchwork.ozlabs.org/patch/76052/ >> http://patchwork.ozlabs.org/patch/76053/ >> >> What they provided was a framework similar to what you have described. The >> piece that will likely be of most interest to use is the changes to >> ixgbe_setup_mrqc that can be found in patch 2 of the 3 above. What it >> specifically did is reduce the RSS key to a 16 bit repeating value. The >> advantage of this is that it makes the TX and RX flow hash result the same >> using the same process. >> >> Thanks, >> >> Alex >> > Does is suffer any overhead (e.g. due to extra computational cost)? > > Thanks! Not that I am aware of. Essentially what the patch set mentioned above does is replace one hash function with another.
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