unresolved function names in perf output

Hello,

I am profiling an MPI app using perf tool on Power 8, LE node installed
with RHEL 7.2 3.10.0-316.el7.ppc64le.
Functions from libmlx5-rdmav2.so (Mellanox library from MOFED 3.1-1.0.0.2)
show up as function pointers in perf report.

On the same node installed with Ubuntu 14.04.03 and same MOFED level
function names are resolved.

RHEL 7.2
  19.79%  spark64.Linux.L  libpami.so         [.] _stripe_hal_writepkti
  11.89%  spark64.Linux.L  libhal64_ibm.so    [.] hal_ibl_rc_scq_flush
   9.07%  spark64.Linux.L  libhal64_ibm.so    [.] hal_ibl_rc_read_callback
   8.40%  spark64.Linux.L  libpami.so         [.] _stripe_hal_read_callback
   7.65%  spark64.Linux.L  libpami.so         [.] _stripe_hal_flush
   5.83%  spark64.Linux.L  libhal64_ibm.so    [.] hal_ibl_rc_scq_writepkti
   4.48%  spark64.Linux.L  libpami.so         [.]
LapiImpl::Interconnect::SendPacketI
   3.19%  spark64.Linux.L  libpami.so         [.] Sam::Send
   2.75%  spark64.Linux.L  libpami.so         [.] _lapi_dispatcher<true>
   2.33%  spark64.Linux.L  libmlx5-rdmav2.so  [.] 0x0000000000010b20
   2.02%  spark64.Linux.L  libpami.so         [.] SamSendQueue::Process
   1.82%  spark64.Linux.L  libmlx5-rdmav2.so  [.] 0x0000000000010b98


Ubuntu 14.04.3
  18.09%  spark64.Linux.L  libpami.so         [.]
_Z21_stripe_hal_writepktiPvS_S_jS_
   9.54%  spark64.Linux.L  libhal64_ibm.so    [.] hal_ibl_rc_scq_flush
   8.67%  spark64.Linux.L  libmlx5-rdmav2.so  [.] mlx5_poll_cq_1
   8.22%  spark64.Linux.L  libhal64_ibm.so    [.] hal_ibl_rc_read_callback
   7.70%  spark64.Linux.L  libpami.so         [.]
_Z25_stripe_hal_read_callbackPvPFiS_S_jES_P11hal_param_t
   7.24%  spark64.Linux.L  libpami.so         [.] _Z17_stripe_hal_flushPvS_
   6.76%  spark64.Linux.L  libhal64_ibm.so    [.] hal_ibl_rc_scq_writepkti
   4.52%  spark64.Linux.L  libmlx5-rdmav2.so  [.] get_sw_cqe


Regards

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