On Tue, 2019-06-04 at 09:28 +0200, Tom Barbette wrote: > Le 31/05/2019 à 20:06, Saeed Mahameed a écrit : > > The question is, On the same packet rate/bandwidth do you see > > higher > > cpu utilization on mlx5 compared to other drivers? you have to > > compare > > apples to apples. > > > I meant relative increase. Of course at 40G the XL710 is using less > CPU, > but activating XDP is nearly free. As XDP is purely per packet I > would > expect the cost of it to be similar. Eg, a few instructions per > packet. > > > Thanks Jesper for looking into this! > > I don't think I will be of much help further on this matter. My take > out > would be: as a first-time user looking into XDP after watching a > dozen > of XDP talks, I would have expected XDP default settings to be > identical > to SKB, so I don't have to watch out for a set of per-driver > parameter > checklist to avoid increasing my CPU consumption by 15% when > inserting > "a super efficient and light BPF program". But I understand it's not > that easy... > Hi Tom, Don't give up so easy on XDP :) let me do a quick test and see how we can help here. > Tom
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