Re: [Starpu-devel] [Morse-devel] MPI tags limitation with Starpu

[Nathalie Furmento <nathalie.furmento@labri.fr>]

Yes, for StarPU 1.2. However this is a internal mechanism, i am not sure
the application should make any assumptions on how we handle MPI comms,
and we may want to change it in futur releases depending on the MPI
implementation.

Cheers,

Nathalie


On 21/02/2017 11:43, Mathieu Faverge wrote:
> So, you say that with StarPU 1.2 we do not need to ask for the tag
> upper bound, right?
> If so, I'll provide a patch.
>
> Mathieu
>
> Le 21/02/2017 à 11:35, Samuel Thibault a écrit :
>> Sameh Abdulah, on mar. 21 févr. 2017 13:28:16 +0300, wrote:
>>> I check our system and I found that we rely on cray mpich and this
>>> gives me
>>> only 21 bits not 31 bits for tag width.
>> With StarPU 1.2 this is really not a problem, since StarPU handles tags
>> itself, it uses only a couple MPI tags.
>>
>> Samuel
>>
>
>