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pgf90 -ta=vector option to manage openacc scheduling ?

 
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escj



Joined: 30 Sep 2009
Posts: 63
Location: Laboratoire d'Aérologie, Toulouse, FRANCE

PostPosted: Fri Oct 04, 2013 9:33 am    Post subject: pgf90 -ta=vector option to manage openacc scheduling ? Reply with quote

Hello .

Do you have a ( beta/hiden ) pgf90 option to manage openacc scheduling ?

For example something like :

pgf90 -ta=nvidia,vector(32)

Or a 'pgi' directive in the fortran code for the entire file ?

The goal is to avail to put this information in all the openacc directive

In my test for example the grid size which are allocated a run time is not visible
by the compiler , which generate vector(128) or vector(256) directive
but the grid tested are mush smaller due to scalability test with MPI and domain decomposition .

1 MPI rank = grid 128x128x128
2 MPI rank = local size 64x128x128
etc ...

Thanks .

Juan
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mkcolg



Joined: 30 Jun 2004
Posts: 6134
Location: The Portland Group Inc.

PostPosted: Fri Oct 04, 2013 11:03 am    Post subject: Reply with quote

Hi Juan,

No, sorry there's no compiler option to set the default vector width. This is part of the OpenACC API and set via the loop directive's "vector ( width )" clause. Though, I can see where it would add benefits so I added a feature request (TPR#19615) and sent it on to engineering.

- Mat
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