On Wed, Nov 06, 2024 at 03:27:20PM +0000, Andrew Stubbs wrote:
> The chunk size for SIMD loops should be right for the current device; too big
> allocates too much memory, too small is inefficient. Getting it wrong doesn't
> actually break anything though.
>
> This patch attempts to choose the optimal setting based on the context. Both
> host-fallback and device will get the same chunk size, but device performance
> is the most important in this case.
>
> gcc/ChangeLog:
>
> * omp-expand.cc (is_in_offload_region): New function.
> (omp_adjust_chunk_size): Add pass-through "offload" parameter.
> (get_ws_args_for): Likewise.
> (determine_parallel_type): Use is_in_offload_region to adjust call to
> get_ws_args_for.
> (expand_omp_for_generic): Likewise.
> (expand_omp_for_static_chunk): Likewise.
Ok.
Jakub
