Beginner cudafortran questions

Accelerated Computing HPC Compilers Legacy PGI Compilers
#1

Hi, I apologize for how trivial some of my questions will be, I foresee myself asking alot of them here but hopefully I’ll be able to find some help! I’ve programmed in CUDA before, and understand it pretty well. I don’t have much experience with FORTRAN although I’m not completely useless with it. Anyways, I’m trying to convert a routine that’s already written in FORTRAN to run in cudafortran.

I have made my first runthrough at coding it and can’t seem to get it to debug. When I try to compile/run it I get these errors:

PGF90-S-0070-Incorrect sequence of statements (rieman.F90: 97)
PGF90-F-0004-Corrupt or Old Module file ./hydro_data.mod (rieman.F90: 118)

The lines listed here are the first lines of code in the file and they consist of simply:

use cudafor



subroutine rieman (numIntCells, numCells, &
rhoav, uav, utav, uttav, pav, &
urell, ugrdl, game, gameav, xnav, x)

Since this routine is part of a much larger module, I have to make the whole thing with the command gmake --jobs=8

in the makefile.h i’ve tried changing the compiler and linker to use pgf90 as opposed to mpif90 but this didnt work. Any idea what I’m doing wrong here?

#2

Hello,

There is not much information in your post, but we can guess.

  1. Incorrect sequence of stmts - you probably need the
    ‘use cudafor’

stmt after others like
implicit none
or some parameter declarations.

  1. Corrupt or old modfile. You need to re-compile the files containing the source
    of ‘hydro_data.mod’ in order to create a modfile with a newer format supported
    by the current compilers.

For a better programming discussion, look at
http://www.pgroup.com/lit/articles/insider/v2n1a4.htm
for some insight on how to program in CUDA fortran and using
the Accelerator model.