Microtasking: Task Creation
*PDIR RESERVE[=N]
- creates N logical tasks, if N is omitted, the number of tasks created is:
- specified by the -reserve compiler option, or
- given in $F_RSVTASK (environment variable), or
- MAXCPU in the RSG or no. of physical processors
- similar to PTFORK
*PDIR RELEASE
- requests release of the logical tasks (of the microtasking group)
- similar to PTJOIN
- synchronization at RELEASE