Re: AF_XDP (i40e) behavior change in 5.11?
Dan Siemon <[email protected]>
| Newsgroups | org.kernel.vger.xdp-newbies |
|---|---|
| Message-ID | <[email protected]> |
On Wed, 2021-03-24 at 11:00 +0100, Magnus Karlsson wrote: > On Wed, Mar 24, 2021 at 10:22 AM Dan Siemon <[email protected]> > wrote: > > > > ./xsk_fwd -i ens1f0 -q 2 -i ens1f1 -q 2 -c 5 -i ens1f0 -q 3 -i > > ens1f1 - > > q 3 -c 6 > > > > On 5.10, the cores (2,3) assigned interrupts for the queues (2,3) > > are > > idle when there is no traffic. > > > > On 5.11, the cores immediately go to 100% system time when the > > program > > starts (as viewed in htop). There is no network traffic. > > > > Intel 710/i40e. > > > > I tried this with xsk_fwd built from 5.10 and 5.11 trees with the > > same > > result. > > > > Is this behavior change expected? > > Thanks for reporting this. No, this is not intentional. I did send up > a fix for a bug in the i40e driver that was introduced in 5.11. It > might be the culprit. Could you please try the patch below and see if > it works? It is not yet in net. > > https://www.spinics.net/lists/netdev/msg729128.htm Hi Magnus, It appears (quick testing) that the patch fixes the problem. Thanks.