Runtime error with CShift when using OMPTARGET #3
Description
When running Benchmark_su3 with OMPTARGET using UVM, there is currently a runtime error:
Grid : Message : 0.874626 s : ==================================================================================================== Grid : Message : 0.874631 s : = Benchmarking SU3xSU3 CovShiftForward(z,x,y) Grid : Message : 0.874634 s : ==================================================================================================== Grid : Message : 0.874637 s : L bytes GB/s GFlop/s Grid : Message : 0.874640 s : ---------------------------------------------------------- CUDA error: an illegal memory access was encountered Libomptarget error: Copying data from device failed. Libomptarget error: Call to targetDataEnd failed, abort target. Libomptarget error: Failed to process data after launching the kernel. Libomptarget error: Run with LIBOMPTARGET_INFO=4 to dump host-target pointer mappings. Cshift_common.h:347:5: Libomptarget fatal error 1: failure of target construct while offloading is mandatory
This may be due to incorrect GPU memory allocation. Having the full suite of memory allocators as indicated in Issue #2 may fix it. But it needs to be investigated further.