Possible Issue with Intel 17.0.098 and GCC 6.1.0 in Develop Branch

[nmhamster]

Not sure if this will be reproducible on other machines but we are seeing Kokkos::initialize hang in the SharedAllocationRecord constructor when using Intel 17.0.098 with GCC 6.1.0 and the OpenMP backend when compiling for KNL. The code will just hang in the initialize call forever and make no progress.

[crtrott]

I wonder if this is related to issue #298. Btw we use the InDevelop label to indicate that a solution (either a new feature or a bugfix) made it into the develop branch.

[nmhamster]

Could be. I can only debug so far with gdb etc but its definitely in the constructor for SharedAllocationRecord. Thanks for note on InDevelop, is there a way to tell you this bug is in master and/or develop?

[crtrott]

Nope there is not (a label). If you find a bug in develop in a non-experimental feature (there is an extra label for experimental) than it is most likely in master as well.

[crtrott]

Can you install GCC 6.1 on bowman? Otherwise I install it locally for me to reproduce.

[nmhamster]

We will get to this later today, we are still running some shake down stuff here and will get you some more info later today. I wouldn't spend long on this until we can work through some of this on the system we are using first.

[crtrott]

Also mark as enhancement, since GCC 6 is not yet officially supported (i.e. this request asks to fix a situation which is not supposed to work).

[crtrott]

Using Intel 17.0.098 with GCC 6.2 on Bowman doesn't link:

ld: cannot find -lgcc

So I can't verify right now.

[nmhamster]

@crtrott how did you load the modules?

[crtrott]

I did load intel/compiler/17.0.098 and then swap gcc.

[nmhamster]

@crtrott - can you try that again please? There is a very subtle file path change in GCC6.2.0 which may be causing your issue. I was able to compile fine before change and it's also working for me after so it's a little odd.

[crtrott]

Looks like it works on the compute nodes, but not on the headnode.

[nmhamster]

Working for me. Can you email me offline with a copy of the env command after you configure your modules?

[crtrott]

anyway looks like it is working now.