>When SLIP SLIH code is active for a SLIP, what happens if >another SLIP is triggered on another CP? Is the system >in a non-dispatchable state? Is SPIN SLIH code serialized?
SLIP does not need to serialize against itself for the most part. Accumulation of time, for example, is what any multi-threaded application would use -- some sort of compare and swap. One of the few places where SLIP does serialize against itself is in taking an SVC Dump for a trap, where if two relatively concurrent matches of the same SLIP trap occur (on different processors, of course) one will win and one will lose (but that's not much more than what could be said about two relatively concurrent SDUMP requests -- one will win and one will find SDUMP busy). In no case does SLIP make the second processor spin or wait. 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
