There were mistakes in the Makefiles for the ugni btl and
mca/common/ugni that prevented the ugni btl from being
used unless one happened to set the --disable-dlopen option
on the config line.
This commit fixes this problem.
This enables IBM's software iWARP provider. With this driver you can
run iWARP/RDMA over any ethernet NIC. Useful for testing OMPI RDMA
logic without requiring an expensive RDMA adapter/infrastructure.
The Soft iWARP code is at: https://www.gitorious.org/softiwarp
The mixing of the Slurm PMI and Cray PMI configure was getting
messy and dangerous - developers working on Slurm PMI often don't
have access to Cray PMI, etc.
This mod pulls out the Cray PMI configure into a separate m4 file.
Cray pmi is now configured as follows:
1) on Cray CLE 5 and higher, Cray PMI is auto detected. pkg-config
is used to resolve the necessary CPP flags, link flags and libs,
etc. Nothing needs to be added to the configure line to pick up
Cray PMI.
2) on legacy Cray CLE 4 systems with PMI 4.X, Cray PMI is also
auto detected.
3) on legacy Cray CLE 4 systems with PMI 5.X Cray PMI can't be auto-detected
owing to changes in the PMI pkg-config file which result in pkg-config
returning an error owing to a dependency of PMI on newer versions of ALPS
installs that are not present on CLE 4. So, for those falling in to this
situation, the --with-cray-pmi=(DIR) method needs to be used.
DIR specifies the Cray PMI install directory. The configure file looks
for required alps libraries first in /usr/lib/alps, then in
/opt/cray/xe-sysroot/default/usr/lib/alps.
In OMPI 1.8 and 1.8.1, we didn't allow gfortran to use the ignore-TKR
style "mpi" Fortran module (which is written in Fortran). Instead,
gfortran used the TKR style "mpi" module, which is written in C.
In OMPI 1.8.2, we removed the gfortran restriction (for suitably
modern gfortran -- i.e., >= 4.9). This allowed gfortran to use the
ignore-TKR style "mpi" module, but exposed a bug where MPI Fortran
sentinel values wouldn't be linked properly on OS X. The solution is
to use ```-Wl,-flat_namespace``` (see the OS X ld(1) man page for
details) when both building the libraries and in the wrapper
compilers.
Thanks to Github user yafshar for rasising the issue.
Fixes#259.
Per #257, the configure test used to check:
```c
```
But out in the code base, we actually do this:
```c
// ...
```
This commit updates the configure test to ```#define``` a string and
then use that with the various ident strategies.
Fixes#257
When running many ranks on a single node using PSM, it's possible to
exhaust the network hardware contexts (there are 16). This patch checks
if only a single node is being used. If so, the 'ipath' component of PSM
is disabled and no hardware contexts are opened.
