Scratch that last question - MPI_Cancel.
Sorry I was being lazy and not checking myself :)
Michael Lees wrote:
>
>
> Jeff Squyres wrote:
>
>> You might want to check and ensure that you don't have any pending
>> send or
>> receive requests when you call MPI_Finalize. LAM will try to finalize
>> all
>> outstanding requests before finishing, which is probably what you're
>> seeing.
>>
>
> This sounds like the problem. Does this apply to all types of calls,
> ie., if you have an Irecv posted that doesn't complete MPI_Finalize will
> hang? Is there any way to force completion or cancel all pending send
> and receives?
>
> Thanks
>
> -Mike
>
>>
>> On Mon, 18 Aug 2003, Michael Lees wrote:
>>
>>
>>> I'm having a problem where my program seems to reach the end of its
>>> execution and then hang.
>>>
>>> The program finishes with two steps, MPI_Barrier followed by
>>> MPI_Finalize?
>>>
>>> All the nodes within the program complete the barrier synchronisation
>>> and then call MPI_Finalize. The MPI_Finalize never completes, it just
>>> seems to hang?
>>>
>>> Each node has two seperate threads, with the master thread calling
>>> MPI_Finalize. The child threads do terminate via pthread_exit and seem
>>> to be okay? To ensure this each of the master threads on the nodes makes
>>> a pthread_join call prior to the final MPI_Barrier call.
>>>
>>> Could anyone offer a suggestions as to what I'm doing wrong or what the
>>> problem might be?
>>
>>
>>
>
>
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--
Mike
mhl_at_[hidden]
http://www.cs.nott.ac.uk/~mhl/
|
