Get information on Graphic card for Kokkos

1. Hardware version (choose)

   • https://en.wikipedia.org/wiki/List_of_Nvidia_graphics_processing_units#RTX_Ax000_series

   • Command nvidia-smi --query-gpu=compute_cap --format=csv

   • Compile https://github.com/NVIDIA/cuda-samples/tree/master/Samples/1_Utilities/deviceQuery ; execute and read info on line “CUDA Capability Major/Minor version number:”

   Example on MANWE

   On MANWE, the command

   $ nvidia-smi --query-gpu=compute_cap --format=csv
   

   returns

   compute_cap
   8.6
   

   Next see item 2. to find out the appropriate option for Kokkos.

2. List of architectures supported by Kokkos (choose)

   • Read top file of external/kokkos/Makefile.kokkos

   • https://kokkos.org/kokkos-core-wiki/keywords.html#gpu-architectures

   Example on MANWE

   On web page we see

   Table 1 Example of web page

   NVIDIA GPUs	Architecture	Compute capability	Models
   …	…	…	…
   Kokkos_ARCH_AMPERE86	Ampere	8.6	A40,A10,A16,A2
   …	…	…	…

   We have to use the option Kokkos_ARCH_AMPERE86 for cmake.

3. Other examples

   Table 2 Examples of cmake option

   Supercomputers (2024)	GPU	Manufacturer	cmake option
   Jean-Zay / Orcus	V100	nvidia	-DKokkos_ARCH_VOLTA70=ON
   Topaze / Orcus	A100	nvidia	-DKokkos_ARCH_AMPERE80=ON
   Jean-Zay / Orcus	H100	nvidia	-DKokkos_ARCH_HOPPER90=ON
   Adastra	MI250X	AMD	-DKokkos_ARCH_AMD_GFX90A

Section author: Alain Cartalade