Author: sergeyken
Subject: Re: Reply to: WER416B Error meaning
Posted: Thu Aug 11, 2016 3:41 am (GMT 5.5)
More precisely, EXCP is System/Z central processor machine instruction which initiates a specific Channel Program - the sequence of physical input/output instructions running separately on one of specific I/O processors; the name of those processors in System/Z is "I/O channel".
Some equivalent for EXCP on other platforms is: the call to a device driver routine.
EXCP count can be considered as count of real physical input/output operations. The less is EXCP count, the faster total execution time could be expected.
Subject: Re: Reply to: WER416B Error meaning
Posted: Thu Aug 11, 2016 3:41 am (GMT 5.5)
| enrico-sorichetti wrote: |
| EXCP is not the abbreviation/whatsoever of EXCEPTION but the acronym for EXecute Channel Program and relates to the INPUT/OUTPUT pseudo-instructions executed |
More precisely, EXCP is System/Z central processor machine instruction which initiates a specific Channel Program - the sequence of physical input/output instructions running separately on one of specific I/O processors; the name of those processors in System/Z is "I/O channel".
Some equivalent for EXCP on other platforms is: the call to a device driver routine.
EXCP count can be considered as count of real physical input/output operations. The less is EXCP count, the faster total execution time could be expected.