Hi Nikhil,
does this only happen when invoked from aprun with the MPI version of
X10RT, or does it happen with the sockets version of X10RT as well?
I would guess that the way that X10 reads environment variables on
standard Linux (line 131 of
x10.runtime/src-cpp/x10/lang/RuntimeNatives.cc - see
http://linux.die.net/man/5/environ) may not work correctly on Cray
Linux. I don't know the correct way to access the user environment on a
Cray - sorry.
Are you able to debug the executable, to see whether the array char**
environ is populated?
Cheers,
Josh
On 06/11/13 16:25, Nikhil Padmanabhan wrote:
Hi Josh,
Thanks! The issue I was having was actually compiling X10 (and the MPI
backend); that appears to default to mpicxx as the compiler. I worked
around it by linking "cc" (the MPI wrapper) to mpicc.
I can now successfully build the HelloWorld.x10 example as :
x10c++ -x10rt mpi ./HelloWorldTest.x10
(I changed the x10rt_mpi.properties to use the correct compiler).
However, when I try and run it :
x10/Samples> aprun -n 1 -N 1 ./HelloWorld
HelloWorld: x10/lang/RuntimeNatives.cc:144: static
x10::util::HashMap<x10::lang::String*, x10::lang::String*>*
x10::lang::RuntimeNatives::loadenv(): Assertion `val!=__null' failed.
_pmiu_daemon(SIGCHLD): [NID 06022] [c7-3c1s1n2] [Tue Nov 5 20:58:07
2013] PE RANK 0 exit signal Aborted
(This is on a Cray XC30)
Any thoughts?
Thanks!
-- Nikhil
---------------------------------
Nikhil Padmanabhan
nikhil.padmanab...@yale.edu <mailto:nikhil.padmanab...@yale.edu>
On Tue, Nov 5, 2013 at 11:41 PM, Josh Milthorpe
<josh.miltho...@anu.edu.au <mailto:josh.miltho...@anu.edu.au>> wrote:
Hi Nikhil,
you can tell the X10 compiler to use a different postcompiler
using the -post option. (To see the format specification of this
and other allowed command line parameters, just run x10c++ without
any parameters.)
For example, you could run
$ x10c++ -x10rt mpi -post 'custom_mpicxx'
To use custom_mpicxx instead of the default mpicxx.
Once compiled with MPI, native X10 programs are just like standard
executables, so you can invoke them with mpiexec, mpirun, or
whatever MPI program you would normally use.
Cheers,
Josh
http://cs.anu.edu.au/~Josh.Milthorpe/
<http://cs.anu.edu.au/%7EJosh.Milthorpe/>
On 06/11/13 15:17, Nikhil Padmanabhan wrote:
Hello,
I've been playing with X10, and wanted to compile it with the MPI
backend. However, the MPI compilers on the system I'm running on
are wrapped into cc (i.e. mpicxx etc do not exist). Is there a
way to get the build process to use a different MPI c++ compiler?
I tried setting the MPICXX environment variable, but that seemed
to have no effect...
I presume I'd also run into the same issue when attempting to
compile?
Thanks!
-- Nikhil
---------------------------------
Nikhil Padmanabhan
nikhil.padmanab...@yale.edu <mailto:nikhil.padmanab...@yale.edu>
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