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From: Dirk Eddelbuettel (edd_at_[hidden])
Date: 2007-08-13 17:26:31


Adrian,

On 13 August 2007 at 22:28, Adrian Knoth wrote:
| On Thu, Aug 02, 2007 at 10:51:13AM +0200, Adrian Knoth wrote:
|
| > > We (as in the Debian maintainer for Open MPI) got this bug report from
| > > Uwe who sees mpi apps segfault on Debian systems with the FreeBSD
| > > kernel.
| > > Any input would be greatly appreciated!
| > I'll follow the QEMU instructions on your website and investigate on
| > my own ;)
|
| I was able to get OMPI running on kfreebsd-amd64. I used a nightly
| snapshot from the trunk, so the problem is "more or less fixed by
| upstream" ;)
|
| adi_at_debian:~$ ./ompi/bin/mpirun -np 2 ring
| 0: sending message (0) to 1
| 0: sent message
| 1: waiting for message
| 1: got message (1) from 0, sending to 0
| 0: got message (1) from 1
|
| adi_at_debian:~$ ./ompi/bin/ompi_info
| Open MPI: 1.3a1r15820
| Open MPI SVN revision: r15820
| Open RTE: 1.3a1r15820
| Open RTE SVN revision: r15820
| OPAL: 1.3a1r15820
| OPAL SVN revision: r15820
| Prefix: /home/adi/ompi
| Configured architecture: x86_64-unknown-kfreebsd6.2-gnu
|
|
| I'll now compile the 1.2.3 release tarball and see if I can reproduce

I really appreciate the help.

| the segfaults. On the other hand, I guess nobody is using OMPI on
| GNU/kFreeBSD, so upgrading the openmpi-package to a subversion snapshot
| would also fix the problem (think of "fixed in experimental").

Well, I generally prefer to follow upstream releases, and Jeff from the
upstream team echoed that. Let's wait for 1.2.4, shall we?

OTOH if you can back out a patch for 1.2.3, I'd apply that.
 
|
| JFTR: It's currently not possible to compile OMPI on amd64 (out of the
| box). Though it compiles on i386
|
| http://experimental.debian.net/fetch.php?&pkg=openmpi&ver=1.2.3-3&arch=kfreebsd-i386&stamp=1187000200&file=log&as=raw
|
| it fails on amd64:
|
| http://experimental.debian.net/fetch.php?&pkg=openmpi&ver=1.2.3-3&arch=kfreebsd-amd64&stamp=1186969782&file=log&as=raw
|
| stacktrace.c: In function 'opal_show_stackframe':
| stacktrace.c:145: error: 'FPE_FLTDIV' undeclared (first use in this
| function)
| stacktrace.c:145: error: (Each undeclared identifier is reported only
| once
| stacktrace.c:145: error: for each function it appears in.)
| stacktrace.c:146: error: 'FPE_FLTOVF' undeclared (first use in this
| function)
| stacktrace.c:147: error: 'FPE_FLTUND' undeclared (first use in this
| function)
| make[4]: *** [stacktrace.lo] Error 1
| make[4]: Leaving directory `/build/buildd/openmpi-1.2.3/opal/util'
|
|
| This is caused by libc0.1-dev in /usr/include/bits/sigcontext.h, the
| relevant #define's are placed in an #ifdef __i386__ condition. After
| extending this for __x86_64__, everything works fine.
|
| Should I file a bugreport against libc0.1-dev or will you take care?

I'm confused. What is libc0.1-dev ?
 
Also note that I happened to have uploaded a third Debian revision of 1.2.3
yesterday, and that Debian release 1.2.3-3 built fine on amd as per:

http://buildd.debian.org/build.php?&pkg=openmpi&ver=1.2.3-3&arch=amd64&file=log

So are we sure there's a bug? Maybe you were just bitten by something in SVN
that is not yet deemed release quality?

| I'll keep you posted...

I appreciate that.

Cheers, Dirk
 
| --
| Cluster and Metacomputing Working Group
| Friedrich-Schiller-Universität Jena, Germany
|
| private: http://adi.thur.de
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-- 
Three out of two people have difficulties with fractions.