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Subject: Re: [OMPI users] MPI process hangs if OpenMPI is compiled with --enable-thread-multiple
From: Ralph Castain (rhc.openmpi_at_[hidden])
Date: 2013-11-25 21:02:54


Sent from my iPhone

> On Nov 25, 2013, at 5:04 PM, Pierre Jolivet <jolivet_at_[hidden]> wrote:
>
>
>> On Nov 24, 2013, at 3:03 PM, Jed Brown <jedbrown_at_[hidden]> wrote:
>>
>> Ralph Castain <rhc_at_[hidden]> writes:
>>
>>> Given that we have no idea what Homebrew uses, I don't know how we
>>> could clarify/respond.
>
> Ralph, it is pretty easy to know what Homebrew uses, c.f. https://github.com/mxcl/homebrew/blob/master/Library/Formula/open-mpi.rb (sorry if you meant something else).

Might be a surprise, but I don't track all these guys :-)

Homebrew is new to me

>
>> Pierre provided a link to MacPorts saying that all of the following
>> options were needed to properly enable threads.
>>
>> --enable-event-thread-support --enable-opal-multi-threads --enable-orte-progress-threads --enable-mpi-thread-multiple
>>
>> If that is indeed the case, and if passing some subset of these options
>> results in deadlock, it's not exactly user-friendly.
>>
>> Maybe --enable-mpi-thread-multiple is enough, in which case MacPorts is
>> doing something needlessly complicated and Pierre's link was a red
>> herring?
>
> That is very likely, though on the other hand, Homebrew is doing something pretty straightforward. I just wanted a quick and easy fix back when I had the same hanging issue, but there should be a better explanation if --enable-mpi-thread-multiple is indeed enough.

It is enough - we set all required things internally

>
> Pierre
>
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