[committed, OG10] amdgcn: Tune default OpenMP/OpenACC GPU utilization
Andrew Stubbs
ams@codesourcery.com
Wed Jul 15 20:49:11 GMT 2020
This patch tunes the default GPU thread count for OpenMP and OpenACC on
AMD GCN devices. It chooses a sensible default if no attributes are
given at all, increases the number of OpenACC gangs if only one worker
per gang is specified, and increases the number of workers otherwise.
The tuning is still a work in progress as we fix issues that limit
occupancy.
The patch is not suitable for mainline until the multiple-worker support
is merged there, so for now this will exist on devel/omp/gcc-10 only.
Andrew
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