On Tue, 24 Sep 2019 12:31:51 -0400 "Jim Vaigl" <[email protected]> wrote:
>> Since no one has chimed in with any build/install/configure suggestion for >> the >> BlueField, I've spent some time debugging and thought I'd share the results. >> Building the l3fwd example application and running it as the docs suggest, >> when >> I try to send it UDP packets from another machine, it dumps core. >> >> Debugging a bit with gdb and printf, I can see that from inside >> process_packet() >> and processx4_step1() the calls to rte_pktmbuf_mtod() return Nil or >> suspicious >> pointer values (i.e. 0x80). The sample apps don't guard against NULL >> pointers >> being returned from this rte call, so that's why it's dumping core. >> >> I still think the problem is related to the driver config, but thought this >> might ring a bell for anyone who's had problems like this. >> >> The thing that still bothers me is that rather than seeing what I was >> expecting >> at init based on what the documentation shows: >> [...] >> EAL: probe driver: 15b3:1013 librte_pmd_mlx5 >> >> ... when rte_eal_init() runs, I'm seeing: >> [...] >> EAL: Selected IOVA mode 'PA' >> EAL: Probing VFIO support... >> >> This still seems wrong, and I've verified that specifying the BlueField >> target ID >> string in the make is causing "CONFIG_RTE_LIBRTE_MLX5_PMD=y" to appear in >> the .config. >> >> Regards, >> --Jim Vaigl >> 614 886 5999 >> >> > >From: Stephen Hemminger [mailto:[email protected]] >Sent: Tuesday, September 24, 2019 1:18 PM >To: Jim Vaigl >Cc: [email protected] > >Subject: Re: [dpdk-users] DPDK on Mellanox BlueField Ref Platform >make sure you have latest version of rdma-core installed (v25). >The right version is not in most distros Great suggestion. I'm using the rdma-core from the MLNX_OFED 4.6-3.5.8.0 install. I can't figure out how to tell what version that thing includes, even looking at the source, since there's no version information in the source files, BUT I went to github and downloaded rdma-core v24 and v25 and neither diff cleanly with the source RPM that comes in the OFED install. I don't know yet if it's because this is some different version or if it's because Mellanox has made their own tweaks. I would hope that the very latest OFED from Mellanox would include an up-to-date and working set of libs/modules, but maybe you're on to something. It sounds like a risky move, but maybe I'll try just installing rdma-core from github over top of the OFED install. I have a fear that I'll end up with inconsistent versions, but it's worth a try. Thanks, --Jim
