Update the Linux timer per the master and George's patch on the devel mailing list.

[rhc54]

@bosilca Can you please review? Your patch on the devel mailing list did not apply cleanly to 1.10, so I tried my best to capture things from master.

[mellanox-github]

Test FAILed.
See http://bgate.mellanox.com/jenkins/job/gh-ompi-release-pr/1693/ for details.

[bosilca]

This is indeed an old patch open-mpi/ompi@00300f46. 👍

[rhc54]

Not sure of the source of the issue with pthread_atfork on Mellanox - not seeing an issue anywhere else. I will take a look, but don't have much time to spend on it. Suggest that perhaps Mellanox diagnose why their environments are missing it.

[rhc54]

Built it again just fine on CentOS7, so I suspect indeed that this is an issue of Mellanox not having a pthread library installed. Note also that this was in last night's tarball, and that no MTT failures were reported this morning.

[jladd-mlnx]

@rhc54 Negative, Ghostrider. We have pthread installed.
$ls -l /usr/include/pthread.h
-rw-r--r-- 1 root root 40491 Nov 5 2013 /usr/include/pthread.h
$ls -l /usr/lib64/libpthread.so
-rw-r--r-- 1 root root 222 Nov 5 2013 /usr/lib64/libpthread.so

Git bisect squarely points to this PR.

[jsquyres]

@jladd-mlnx See open-mpi/ompi#1699. Do you have someone who can look into this?

[jladd-mlnx]

@jsquyres I do not. We are trying to get an HPC-X release done this week.

[jladd-mlnx]

@rhc54 Can you revert this? It's causing all kinds of problems with our QA and we're in a critical release phase with both HPC-X and MOFED.

[bosilca]

I don't know why -lpthread would be required for this patch. It does however need -lrt.

[jsquyres]

@bosilca See the detailed analysis on open-mpi/ompi#1699