https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85590
--- Comment #1 from Tom de Vries <vries at gcc dot gnu.org> --- Author: vries Date: Mon Aug 13 12:04:24 2018 New Revision: 263505 URL: https://gcc.gnu.org/viewcvs?rev=263505&root=gcc&view=rev Log: [nvptx] Use CUDA driver API to select default runtime launch geometry The CUDA driver API starting version 6.5 offers a set of runtime functions to calculate several occupancy-related measures, as a replacement for the occupancy calculator spreadsheet. This patch adds a heuristic for default runtime launch geometry, based on the new runtime function cuOccupancyMaxPotentialBlockSize. Build on x86_64 with nvptx accelerator and ran libgomp testsuite. 2018-08-13 Cesar Philippidis <ce...@codesourcery.com> Tom de Vries <tdevr...@suse.de> PR target/85590 * plugin/cuda/cuda.h (CUoccupancyB2DSize): New typedef. (cuOccupancyMaxPotentialBlockSize): Declare. * plugin/cuda-lib.def (cuOccupancyMaxPotentialBlockSize): New CUDA_ONE_CALL_MAYBE_NULL. * plugin/plugin-nvptx.c (CUDA_VERSION < 6050): Define CUoccupancyB2DSize and declare cuOccupancyMaxPotentialBlockSize. (nvptx_exec): Use cuOccupancyMaxPotentialBlockSize to set the default num_gangs and num_workers when the driver supports it. Modified: trunk/libgomp/ChangeLog trunk/libgomp/plugin/cuda-lib.def trunk/libgomp/plugin/cuda/cuda.h trunk/libgomp/plugin/plugin-nvptx.c
