On Thursday, April 04/06/17, 2017 at 15:06:03 +0530, gowrishankar muthukrishnan wrote: > With gcc 6.3.0, I find this app functioning w/o crash. > > Did disabling gcc optimization help ? (set EXTRA_CFLAGS='-O0' before > compile). >
Yes, with optimization disabled, the app is not hitting the segfault. Thanks, Rahul > Regards, > Gowrishankar > On Thursday 06 April 2017 02:34 PM, Rahul Lakkireddy wrote: > > Hi, > > > > For netmap_compat bridge application on Power8, in netmap_regif > > function, the assignment to nmif->ring_ofs[i] is not getting reflected > > immediately. > > > > As a result, the subsequent call to netmap_ring_setup ends up writing > > data at wrong offset. This causes segfault in the app. > > > > If we print the nmif->ring_ofs[i] after assignment, then, we see the > > correct offset and application starts fine. > > > > So, probably, some kind of barrier or mechanism to flush write is > > required on Power8? > > > > BTW, this was tried with ToT dpdk git tree on RHEL 7.3 having below > > gcc version: > > > > gcc version 4.8.5 20150623 (Red Hat 4.8.5-11) (GCC) > > > > Thanks, > > Rahul > > > >
