Hi Jonas,
I can replicate this error with X10 2.5.3, however, it appears to be fixed
in the current Git HEAD. The error appears to be in Team.allreduce, and we
have made a number of changes and improvements to this code since X10
2.5.3.
Are you able to build X10 from the current source HEAD (i.e. by cloning the
X10 Git repository)? If so, could you please confirm whether this fixes
the problem for you?
We are planning a new release of X10 - 2.5.4 - in a week or so, which will
include the fixes to Team.
Many thanks,
Josh Milthorpe
Post Doctoral Researcher
Machine Learning & Decision Analytics
IBM Research
Phone: 1-914-945-2209 1101
Kitchawan Rd
E-mail: [email protected] Yorktown Heights, NY
10598
United
States
From: Jonas Posner <[email protected]>
To: Mailing list for users of the X10 programming language
<[email protected]>
Date: 12/15/2015 02:45 AM
Subject: Re: [X10-users] MPI execution problems with GLB UTSG
Hey,
unfortunately makes no difference.
Jonas
2015-12-15 0:36 GMT+01:00 David P Grove <[email protected]>:
Jonas Posner <[email protected]> wrote on 12/14/2015
04:55:40 PM:
>
> I have some MPI execution problems on a cluster with the UTSG sample in
GLB.
> My versions are:
> x10c++ version 2.5.3 (from git)
> gcc (GCC) 4.9.3
> java version "1.8.0_66", Java(TM) SE Runtime Environment (build 1.8.
> 0_66-b17), Java HotSpot(TM) 64-Bit Server VM (build 25.66-b17, mixed
mode)
> mpirun (Open MPI) 1.8.8
>
> I build x10 with: ant dist -DX10RT_MPI=true
> Compiling UTSG in x10.dist/samples/GLB/uts: x10c++ -x10rt mpi
> UTSG.x10 -o UTSG -O -NO_CHECKS
Hi,
Can you try building without the -NO_CHECKS flag?
The Segfault below smells like a likely null pointer exception would have
been raised if checking was enabled (accessing address 0x8).
--dave
>
> [hla0001:14174] *** Process received signal ***
> [hla0001:14174] Signal: Segmentation fault (11)
> [hla0001:14174] Signal code: Address not mapped (1)
> [hla0001:14174] Failing at address: 0x8
> [hla0001:14174] [ 0] /lib64/libpthread.so.0(+0xf850)[0x7f8552514850]
> [hla0001:14174] [ 1]
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