Excessive cpu load

Description: A overly high CPU load, i.e., the number of processes and threads waiting for CPU time, can indicate one of the following:

• wrong parallelization settings, defaults, or automatisms in applications for the number of MPI ranks or number of threads
• unintentionally using additional parallelization layers like in underlying libraries like BLAS
• blocking of processes due to IO or network activity

Criterion:

• CPU load one-minute average is significantly higher than the number of CPU cores or hardware threads allocated by the job on the node

Works for shared jobs with existing metrics:

• yes, if not the load_one is used but the CPU-core-specific cpu_load_core.

Possible Cures:

• checking parallelization settings