[Linuxppc-users] Fortran compiler, OpenMP 4.x with Offload

Bill Buros wburos at us.ibm.com
Fri Jun 16 06:12:28 AEST 2017


On 6/15/17 2:10 PM, Bill Buros wrote:
>
> Saw an interesting question..
>
> A customer using Fortran asked us whether IBM has an OpenMP 4.x with 
> Offload implementation for FortranXL compiler with the target to 
> offload calculations to Nvidia graphic cards or other accelerators.
>

And a good answer...

This page describes which OpenMP offloading features are supported in 
XLF 15.1.5, system pre-reqs, and how to enable offloading support:

https://www.ibm.com/support/knowledgecenter/SSAT4T_15.1.5/com.ibm.xlf1515.lelinux.doc/proguide/offloading.html

Basically, to turn on offloading support, you just need "-qsmp=omp 
-qoffload".  But we only support a subset of OpenMP 4.5 offloading in 
XLF 15.1.5.  The page above describes the subset.  We also have more 
detail here:

https://www.ibm.com/support/knowledgecenter/SSAT4T_15.1.5/com.ibm.xlf1515.lelinux.doc/getstart/omp_v1315v1515.html
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