Richard Peurifoy wrote:
Roy Hewitt wrote:
Last time we discussed this..(check the archives it comes up quite
regularly..) I wondered whether the TOD clock Steering Facility (aka
instruction PTFF) is only *fully* valid on machines with STP, (I know
you can call the query request form of PTFF without STP as I tried on
a z890) as this would enable a z/OS NTP client to work.. well for
single monoplex etc..
As I understand this instruction, the steering functions are
only available to the basic machine. They can't be used in
LPAR mode. Since you can't run a modern machine in anything
but LPAR mode, these functions are only usable by the LPAR
hypervisor code. The STO (Set TOD Offset) function is listed
as may be available in LPAR mode, so you might be able to use
that to adjust the clock for the LPAR, but if your careless,
you might set the clock backwards and have duplicate timestamps.
As to whether STP is required to enable these functions,
I don't know.
Cheers Richard,
made me re-look at Pops, and yes I see the non-query requests are basic only..
except for STO..
cheers
Roy
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