Environment Variables: Process
OMP_NUM_THREADS (default max(8,#cpu))
- sets the number of threads to use during execution. If OMP_DYNAMIC is set to TRUE, this is the maximum number of threads
OMP_DYNAMIC TRUE|FALSE (default TRUE)
- enables or disables dynamic adjustment of parallel threads to load on the machine. The adjustment can take place at the start of each parallel region Setting OMP_DYNAMIC to FALSE will switch MPC_GANG ON
MPC_GANG ON|OFF (default OFF)
- With gang scheduling all parallel threads are started simultaneously and the time quantum is twice as long as normal. To obtain higher priority for parallel jobs it is often necessary to use:
_DSM_MUSTRUN (default not set)
- to lock threads to a cpu where it happened to be started
_DSM_PPM (default 2/4 processes per node)
- if _DSM_PPM is set to 1 only one process will be started on each node