CPU Affinity has not been supported for many years. I don't remember if it ever was on an address-space basis as opposed to begin on a work-unit basis (I know that you could identify CPU affinity for a scheduled SRB, for example).
The "multiprocessor effect" (or perhaps it's the "multiprocessing effect") comes into play when multiple processors are in play. That's why, for example, a 4 CPU system is not deemed 4 times as fast as a 1 CPU system. The CPU capacity is not effected, but the effective result is. Processor cache, cross-processor communication and other things factor in. Peter Relson z/OS Core Technology Design ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
