[Cado-nfs-discuss] Linear Algebra with MPI

Pierpaolo Santucci santucci.pierpaolo at gmail.com
Fri Aug 15 19:12:33 CEST 2014


Using mpich2-1.5 in place of mpich-3.1.2, everything works fine.

Thanks for the support!

Regards,

Pierpaolo Santucci


On 14 August 2014 20:00, Pierpaolo Santucci <santucci.pierpaolo at gmail.com>
wrote:

> Thanks for the quick response.
>
> In my local.sh there is:
>
> MPI=/home/user/mpich-3.1.2/
>
> Other steps of the GNFS (e.g. Polynomial Selection or Sieving) use MPI
> correctly.
>
> Regards,
>
> Pierpaolo Santucci
>
>
>
> On 14 August 2014 19:47, Emmanuel Thomé <emmanuel.thome at gmail.com> wrote:
>
>> Most probably you haven't compiled cado-nfs for mpi use. There is an
>> influential MPI variable which can be set from local.sh .
>>
>> Please report how far you can go. I have little to no internet connection
>> at all at the moment, but I'll try to help to the extent possible.
>>
>> E.
>> Le 14 août 2014 19:20, "Pierpaolo Santucci" <santucci.pierpaolo at gmail.com>
>> a écrit :
>>
>>>  Hello everyone!
>>>
>>> I'm interested in CADO-NFS 2.1 linear algebra. I want to execute the
>>> Block Wiedemann Algorithm on several hosts via MPI (mpich-3.1.2) but the
>>> command:
>>>
>>> ./bwc.pl :complete mpi=2 hosts=host1,host2 thr=4 mn=64 nullspace=left
>>> interval=100 matrix=/tmp/cado.XXXXBy837j/c90.merge.small.bin wdir=/tmp/tmp
>>> interleaving=0 shuffled_product=1
>>>
>>> gives me the following error:
>>>
>>> Inconsistency -- exactly 2 == 1 * 2 MPI jobs are needed -- got 1
>>> ./dispatch: exited with status 1
>>>
>>> What's wrong?
>>>
>>> Thanking you in advance.
>>> Regards,
>>>
>>> Pierpaolo Santucci
>>>
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>>>
>>>
>
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