David Day <[EMAIL PROTECTED]> wrote on 07/03/2006 05:35:16 PM: > 1. Does a dedicated processor have an entry in the PCCA? If so, > is there some way to recognize the entry as one belonging to a > dedicated processor? Only thing I can find in any doc is the data > areas manual has something at offset 17c into the PCCA.
If you mean dedicated vs. shared processors in the LPAR sense, that is indicated in IHACSD by CSDNDPAR EQU X'10',,C'X' - RUNNING IN NON-DEDICATED PARTITION. In a z/OS LPAR, either all processors are dedicated, or they are all shared. To determine the type of a processor, look at CSD_CP_MASK CSD_IFA_MASK CSD_zIIP_MASK I would recommend that you avoid accessing the PCCA unless you have proper serialization (i.e. you are disabled for I/O and external interrupts). > 2. The announcement I read states the zIIP does not process > general interrupts. That makes sense since they want to dedicate > the processor to specific work, so any type of general interrupt > needing to be processed has to get handled on a general purpose > processor. But the announcement also states the zIIP does not > process IO, nor can it handle timer events. Is there more doc > available anywhere on what is involved in this part of it? z/OS does not use the clock comparator to time events on a zIIP, and z/OS does not enable for any interrupt subclasses in control register 6 on a zIIP. > 3. If an SQL statement should happen to abend at some point in > it's processing, and I'm looking at a dump, will I see activity > formatted in the trace table in the dump for the zIIP? System trace on a zIIP is no different from system trace on a zAAP or a general purpose CPU. Jim Mulder z/OS Dump Whisperer IBM Corp. Poughkeepsie, NY ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
