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Subject: Re: [OMPI devel] [PATCH]Incorrect algorithm choice using coll_tuned_dynamic_rules_filename (over 2GiB message)
From: George Bosilca (bosilca_at_[hidden])
Date: 2012-03-02 15:36:00


Yuki,

I applied your patch and added your copyright in the corresponding files (r26080). I will make a CMR for the 1.4 and 1.5. However, as you might have noticed we're trying to close the 1.4 and move forward.

  Thanks,
    george.

On Mar 1, 2012, at 02:33 , Y.MATSUMOTO wrote:

> Dear All,
>
> Next feedback is about "coll_tuned_dynamic_rules_filename".
>
> Incorrect algorithm is selected in following conditions:
> 1:"--mca coll_tuned_use_dynamic_rules 1" is set.
> 2:"--mca coll_tuned_dynamic_rules_filename" is set.
> 3: Collective communication which is written in 2, called >= 2GiB communication.
> (ex) MPI_Bcast:data type size * count >= 2GiB
> MPI_Allgather: data type size * count * communication size >= 2GiB)
>
> Please see attached patch(Patch is for V1.4.x).
> But, we found problem when over 2GiB message is written in rulefile as "message size".
> (over 2GiB message cannot read correctly.)
> And we do not fix it.
>
> Best Regards,
> yuki Matsumoto
> MPI development team,
> Fujitsu
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