Re: Mellanox PMD failure w/DPDK-2.1.0 and MLNX_OFED-3.1-1.0.3

[Stephen Hemminger <stephen@networkplumber.org>]

On Fri, 16 Oct 2015 12:11:14 -0700
"Bill O'Hara" <billtohara@gmail.com> wrote:

> Hi Olga,
> 
> Sorry for slow response. Initially, raw_ethernet_bw and raw_ethernet_lat
> were not working.
> 
> * we clean installed some boxes, rather than upgrading from previous ofed
> etc and now the raw_ethernet_bw and raw_ethernet_lat work. (This is on
> ubuntu14.04 with most recent mellanox ofed release).
> 
> * dpdk-2.1 still did not work. We clean installed the build box, to clear
> any possibility of mismatches due to upgrade process. Still not working.
> 
> * at the suggestion of one of our developers, we switched from statically
> linking dpdk and libibverbs to static dpdk and dynamic libibverbs. Now the
> dpdk test programs work.
> 
> * at this point, we've switched back to our own kernel build (with
> patches), our own dpdk programs, and everything appears to be correct.
> 
> Apologies for the firedrill -- we do not yet know the exact root cause, but
> it appears to be related to having done an upgrade of mellanox ofed on the
> ubuntu14.04 boxes AND building with static linking of libibverbs (though we
> double checked that the correct .a file was being linked). I will let you
> know if we have a more satisfactory answer -- we're also more highly
> prioritizing hermetic builds at this point.
> 
> thanks for your help and hints!
> bill

Sounds like a case where the application was not linked with proper
LDFLAGS to enable constructors.