dara.hardware module

Runtime CPU-core detection, used to size worker/thread counts portably.

detect_cpu_count()

Detect the number of CPU cores usable by this process.

Checked in priority order:

1. SLURM_CPUS_PER_TASK, then SLURM_CPUS_ON_NODE (SLURM-managed jobs).

2. os.sched_getaffinity(0) (Linux only; reflects taskset/affinity restrictions that os.cpu_count() ignores).

3. os.cpu_count().

Return type:

int

Returns:

A positive integer. Falls back to 1 if nothing above yields a usable count.