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To build and execute code on the GPU A100 cluster, please login to

  • a GPU A100 login node, like bgnlogin.nhr.zib.de.
  • see also Quickstart

Code build

For code generation we recommend the software package NVIDIA hpcx which is a combination of compiler and powerful libraries, like e.g. MPI.

Plain OpenMP for GPU
bgnlogin1 ~ $ module load nvhpc-hpcx/23.1
bgnlogin1 ~ $ module list
Currently Loaded Modulefiles: ... 4) hpcx   5) nvhpc-hpcx/23.1
bgnlogin1 ~ $ nvc -mp -target=gpu openmp_gpu.c -o openmp_gpu.bin
MPI and OpenMP for GPU
bgnlogin1 ~ $ module load nvhpc-hpcx/23.1
bgnlogin1 ~ $ module list
Currently Loaded Modulefiles: ... 4) hpcx   5) nvhpc-hpcx/23.1

Code execution

Lise's CPU-only partition and the A100 GPU partition share the same SLURM batch system. The main SLURM partition for the A100 GPU partition has the name "gpu-a100". An example job script is shown below.

GPU job script
#!/bin/bash
#SBATCH --partition=gpu-a100
#SBATCH --nodes=2
#SBATCH --ntasks=8 
#SBATCH --gres=gpu:4

module load openmpi/gcc.11/4.1.4
mpirun ./mycode.bin
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