Possible issue with Cuda 12 and Turing Architecture

[JPGlaser]

@ajameson

Getting this set up on a machine with RTX Titans and Cuda 12.0:

(pulsar) [sysadmin@titan dedisp]$ make
mkdir -p include
mkdir -p lib
mkdir -p obj
/usr/local/cuda-12.0/bin/nvcc  -c -Xcompiler "-fPIC -Wall" -O3 -g -DDEDISP_DEBUG=0  -arch=sm_75 -Isrc -I/usr/local/cuda-12.0/include -o obj/dedisp.o src/dedisp.cu
src/kernels.cuh(38): error: texture is not a template

src/kernels.cuh(242): error: no instance of overloaded function "tex1Dfetch" matches the argument list
            argument types are: (<error-type>, unsigned long)

src/kernels.cuh(360): error: identifier "cudaBindTexture" is undefined

3 errors detected in the compilation of "src/dedisp.cu".
make: *** [Makefile:45: lib/libdedisp.so.1.0.1] Error 2

Any ideas?

~ Joe G.

[benbarsdell]

Texture references are no longer supported in CUDA 12. Given that dedisp isn't using them anyway on modern GPUs, they can be disabled completely under CUDA 12 using this patch (.txt extension added to appease GitHub):
dedisp_fix_cuda_12_textures.patch.txt

(I notice that there are also a bunch of warnings about cudaThreadSynchronize being deprecated, which we should probably fix too, by replacing them with cudaDeviceSynchronize).