[mpich-discuss] Porting MPICH

[Jeff Hammond]

Yeah, I would use the abort strategy to detect if MPICH is using
thread-related functions in MPI_THREAD_SINGLE (ignoring
MPICH_ASYNC_PROGRESS=1) and the noop implementation for practical
purposes.

Jeff

On Sun, May 19, 2013 at 2:49 PM, Pavan Balaji <balaji at mcs.anl.gov> wrote:
>
> Thanks.  Yes, they can be mostly no-ops (except TLS checks which can be
> any static variable since there's only one thread by definition).
> Implementing them as "not-implemented" aborts might be OK too.
>
>  -- Pavan
>
> On 05/19/2013 02:43 PM US Central Time, Jeff Hammond wrote:
>> Presumably those functions can be noops if no threads are going to be
>> used.  Am I wrong?
>>
>> It might be worth implementing those functions as stubs that abort
>> with UNIMPL error and see how far that goes.  I'll try to get to this
>> later today.
>>
>> Jeff
>>
>> On Sun, May 19, 2013 at 2:36 PM, Pavan Balaji <balaji at mcs.anl.gov> wrote:
>>>
>>> On 05/19/2013 02:28 PM US Central Time, jhonatan alves wrote:
>>>> But i believe that the missing of POSIX
>>>> threads can be the most trouble part. So we need to port to the thread
>>>> implementation in EPOS.
>>>
>>> Yup, I too believe that'll be the blocker.  MPICH supports multiple
>>> threading packages, but currently requires at least one to function
>>> correctly:
>>>
>>> https://trac.mpich.org/projects/mpich/ticket/231
>>>
>>> It's been a while since I looked into this issue, but I could look into
>>> it if you are running into it for your platform.
>>>
>>>  -- Pavan
>>>
>>> --
>>> Pavan Balaji
>>> http://www.mcs.anl.gov/~balaji
>>> _______________________________________________
>>> discuss mailing list     discuss at mpich.org
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>>
>>
>>
>
> --
> Pavan Balaji
> http://www.mcs.anl.gov/~balaji



-- 
Jeff Hammond
Argonne Leadership Computing Facility
University of Chicago Computation Institute
jhammond at alcf.anl.gov / (630) 252-5381
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