Any chance you will/may/can share this example code to the rest of us? Not that 
it matters to me. We don't have a zIIP or zAAP.

--
John McKown
Systems Engineer IV
IT

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> -----Original Message-----
> From: IBM Mainframe Assembler List
> [mailto:[email protected]] On Behalf Of Sam Siegel
> Sent: Monday, October 18, 2010 12:20 PM
> To: [email protected]
> Subject: Re: Speciality TCBs
>
> On Sun, Oct 17, 2010 at 6:07 PM, Sam Siegel <[email protected]> wrote:
> >
> > On Sun, Oct 17, 2010 at 5:44 PM, William H. Blair
> <[email protected]>wrote:
> >
> >> Sam Siegel explains:
> >>
> >> <--snip-->
>
> > It is extremely unlikely that you have accidentally
> stumbled upon the
> >> mechanism to make this little bit of magic happen. It is
> always possible
> >> that there is a bug in z/OS and your SRB is, in fact,
> being dispatched on
> >> a
> >> zIIP. But I seriously doubt that.
> >>
> >
> > Agreed, it could be a bug.  But I've seen this in v1r9 and
> v1r10.  I'm not
> > saying that there is certainty that the SRB is dispatched
> to a zIIP all of
> > the time.  But it seems to happen extremely regularly.
> >
> > <--snip-->
>
> The SRB was modified to do a loop of about 420,000,000
> iterations.  Inside
> the loop was a STAP followed by a CLI to see which CPU was being used.
>  Based on the CPU, different counters were incremented.
> There are 2 CPUs on
> the system.
>
> The counter for cpu 0 is   44,300,650.
> The counter for cpu 1 is 375,129,750.
>
> Below is the output from D M=CPU
>
> IEE174I 06.33.02 DISPLAY M           FRAME  1     F      E   SYS=xxxx
> PROCESSOR STATUS
> ID  CPU                  SERIAL
> 00  +                     02abcd9988
> 01  +I                    12abcd9988
>
> System name and serial numbers have been masked.
>
> <--snip-->
>
>
> >
> >> --
> >> WB
> >>
> >
> >
>
>

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