Hello all,
We recently applied the latest RedHat update (/etc/redhat-release says
"Red Hat Enterprise Linux WS release 4 (Nahant Update 7)") to our cluster,
and now codes that use IB seg fault.
We have tried multiple versions of OpenMPI and PGI and GNU compilers. We
have compiled with --memory-
In the entire 1.2 series, RDMA is only allowed if the architecture of the
two processes match. The 1.3 series added the ability to chose based on
datatype.
Brian
On Mon, 25 Aug 2008, Mi Yan wrote:
Brian,
I'm using OpenMPI 1.2.6 (r17946). Could you plese check which version
works ? Thanks
I believe that this is something Brad at IBM worked on, wasn't it? I
*think* you may just need the development trunk (i.e., upcoming v1.3),
but I won't swear to that.
Regardless, you need to have OMPI compiled for heterogeneous support
because control headers still need to be adjusted for
Brian,
I'm using OpenMPI 1.2.6 (r17946). Could you plese check which
version works ? Thanks a lot,
Mi
"Brian W.
Barrett"
On Mon, 25 Aug 2008, Mi Yan wrote:
Does OpenMPI always use SEND/RECV protocol between heterogeneous
processors with different endianness?
I tried btl_openib_flags to be 2 , 4 and 6 respectively to allowe RDMA,
but the bandwidth between the two heterogeneous nodes is slow, same as
the bandwidth
Does OpenMPI always use SEND/RECV protocol between heterogeneous
processors with different endianness?
I tried btl_openib_flags to be 2 , 4 and 6 respectively to allowe RDMA,
but the bandwidth between the two heterogeneous nodes is slow, same as
the bandwidth when btl_openib_flags to be 1.
