Hi Yipeng, On Mon, Jan 8, 2018 at 1:54 PM, Wang, Yipeng1 <[email protected]> wrote: > I think this is an interesting idea. > > One caveat is that in this case we use the rules' field to infer the flows' > field. If the rule > does not consider a field within which the flow has high entropy, it still > does not help. > Or if the rule considers many fields but the flow does not have high entropy > there, then > we add the incremental software hash overhead for little benefit. > > I am not sure if that is common in real cases, I am more concerned with the > second scenario, > what do you think? > Yes, you're right. I don't have any good solution, but are we able to observe from the subtable entries or its statistics to see whether a field has high entropy? So in your second scenario, we don't have to add all new fields into the hash but only a subset of them.
> We should profile a little bit to see how much overhead the incremental CRC > will > cost. > That would be very helpful! Thanks William _______________________________________________ dev mailing list [email protected] https://mail.openvswitch.org/mailman/listinfo/ovs-dev
