Hi Marina,
the message you found regarding X10RT_MPI_THREAD_MULTIPLE is now out of
date :-(
Since X10 2.5.2, MPI_THREAD_MULTIPLE is the default threading level, but it
is possible to request MPI_THREAD_SERIALIZED by setting the environment
variable X10RT_MPI_THREAD_SERIALIZED. In this case, X10 will serialize all
calls to MPI functions through a global lock (in accordance with the rules
for MPI_THREAD_SERIALIZED).
https://xtenlang.atlassian.net/browse/XTENLANG-3490
Could you please try running with X10RT_MPI_THREAD_SERIALIZED=1 and let us
know the result?
Cheers,
Josh Milthorpe
Post Doctoral Researcher
Cognitive Systems: Learning to Reason
IBM Research
Phone: 1-914-945-2209 1101
Kitchawan Rd
E-mail: jjmil...@us.ibm.com Yorktown Heights, NY
10598
United
States
From: Marina Andric <marina.and...@imtlucca.it>
To: Mailing list for users of the X10 programming language
<x10-users@lists.sourceforge.net>
Date: 07/27/2016 12:13 PM
Subject: Re: [X10-users] Problem with compiling programs to C++ backend
after building x10 from source
Hi again,
I came across
"Only if X10_STATIC_THREADS=1 X10_NTHREADS=1 and
X10_NUM_IMMEDIATE_THREADS=0 will we use single-threaded MPI modes."
on one of the pages dedicated to X10.
I now initialized the variables and I'm not anymore facing the error that
provided and requested threading levels do not match.
However, my code uses Clocks for synchronization and I get runtime error
ClockUseException: Clocks are not compatible with
static threads.
I guess that I've hit the wall now and can't proceed in this direction.
Or is there a possible workaround to make Clocks work in mpi thread
serialized setting ?
Thank you,
Marina
On Wed, Jul 27, 2016 at 3:26 PM, Marina Andric <marina.and...@imtlucca.it>
wrote:
Hi,
Thanks a lot Marco for the help. Yes, I initially copied the executable,
then I built it on the cluster and now it works, almost :)
Works well until the moment I compile the program with -x10rt mpi option.
The program is compiled and executable is generated, but it is not
running. The error states:
"Underlying MPI implementation does not provide
requested threading level
Unable to support requested level of X10
threading; exiting"
(the whole output is attached)
I found this page:
https://sourceforge.net/p/x10/mailman/message/33490796/ and started
looking into X10 runtime variables (X10RT_MPI_THREAD_MULTIPLE,
X10_STATIC_THREADS) and played a bit with those but with no success..
On my linux laptop it works with -x10rt mpi option, with no errors. In
both cases, on my machine and the cluster, MPI_THREAD_MULTIPLE is set to
no.
Does someone has an idea how to solve this?
Thank you,
Marina
On Tue, Jul 26, 2016 at 1:00 AM, Marco Bungart <m.bung...@gmx.net> wrote:
Hi Maina,
looks like you have not built the program on the cluster. Did you just
copy the executable? This will in general not work. You should download
and compile/install X10 on the cluster as well. The easiest way would be
to build X10 from source (tutorial found here:
http://x10-lang.org/x10-development/building-x10-from-source.html).
After that, re-compile your program on the cluster and execute it.
Cheers,
Marco
Am 25.07.2016 um 18:11 schrieb Marina Andric:
>
> Thanks a lot Marco, this was something I neglected :) the program is
> compiling/executing now on my machine.
>
> 'Im still having a problem on the cluster. I get compilation error
stating:
>
> x10.dist/stdlib/lib/libx10.so: undefined reference to
'memcpy@GLIBC_2.14'
> x10.dist/stdlib/lib/libx10.so: undefined reference to
> 'clock_gettime@GLIBC_2.17'
>
> Does somebody know the possible origins of this problem? Do I maybe
need
> to load some additional modules on the cluster, except gcc and mpi?
>
> Warm regards,
> Marina
>
>
>
>
>
>
>
>
>
>
>
> On Sun, Jul 24, 2016 at 11:48 PM, Marco Bungart <m.bung...@gmx.net
> <mailto:m.bung...@gmx.net>> wrote:
>
> Hi,
>
> have you tried running "$> ./a.out" instead of "$> a.out"? Some
systems
> distinguish between system-wide executable (i.e. executable
located in
> one of the paths specified in the $PATH environment variable) and
> executables in the current folder (i.e. ".").
>
> Cheers,
> Marco
>
> Am 24.07.2016 um 21:22 schrieb Marina Andric:
> > Hi all,
> >
> > I am trying to run an x10 program on a cluster. The cluster
supports
> > only MPI based communication between nodes so I built the latest
x10
> > source (version 2.6.0) with option -DX10RT_MPI=true and the
build was
> > successful.
> >
> > My program works when it's compiled to java (via x10c) but it
doesn't
> > work when it is compiled to c++ (via x10c++).
> >
> > For example, when
> >
> >> x10.dist/bin/x10c++ hello.x10 (creates a.out)
> >> a.out
> >
> > the outcome is a.out: command not found.
> >
> > I tested a bit around, with -o option, -x10rt sockets (mpi) and
> nothing
> > seemed to change. I eventually built x10 without
-DX10RT_MPI=true and
> > the problem is the same, also with the x10 version 2.5.4.
> >
> > I was building and testing on my local linux machine and I
checked all
> > the program versions and they seem to be ok:
> >
> > ant 1.9.3
> > g++ 4.8.4
> >
> > Can someone please say if I'm missing something?
> >
> > Thank you,
> > Marina
> >
> >
> >
> >
> >
> >
> >
> >
>
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