Dear all, The amazing mps code (mps_evolve and mps_optim) works very well with OpenMP on a node of a cluster when I start the task by hand. It can spawn many threads and calculate very fast. But when I wrote a sbatch script to commit a job to cluster by slurm, the mps applications can only use one thread and calculate very slowly. The sbatch script is shown as ----------------------------------------------------------------- #!/bin/bash #SBATCH --job-name=test_alps_omp #SBATCH --output=test_alps_omp.out #SBATCH --ntasks=1 #SBATCH --cpus-per-task=4 export OMP_NUM_THREADS=$SLURM_CPUS_PER_TASK mps_evolve test_alps_omp.in.xml ----------------------------------------------------------------- Does anyone have any idea about it? Thanks a lot! Beat regards, Rongyang Sun ----------------------------------------------------------------- Rongyang Sun Ph.D. Candidate Theoretical Quantum Matter Physics Institute for Advanced Study, Tsinghua University, Beijing 100084, China E-mail: sunry15@mails.tsinghua.edu.cn; sun-rongyang@outlook.com