Barbara/Tom,
Thanks for the replies. I'll try to answer them both
together.
1) I'm not seeing any CLCK/EXT/DSP entries for the logical processor within the
the trace.
2) The Physical CPU changes on every trace entry for the 15 second period,
There are only 11 trace entries.
So it looks like the LCP is jumping all over the place onto different PCPs
without any trace indication, other than the CP number.
From what Tom says z/OS doesn't know about the interrupt so the LCP info is
stored somewhere off z/OS and anything on that LCP would remain undispatched
until that LCP is put back on a PCP, which may be the same one or a different
one.
I'm beginning to suspect this LCP was just idle. and it's not my problem.
Regarding STCK I was wondering if piplelining of instructions meant that the
slip might fire before the STCK was complete. I guess not.
Is there any trace put in the MVS trace table when a slip fires?
Or is there any other way to see which LCP we were running on at the time?
I had a look in the PSA and the control registers but didn't spot anything.
Thanks for the good info.
Ron.
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