Re: How many FRR stack entries are available?

[Steve Smith]

The text seems to come from the explanation for a S07D abend.  Which not
coincidentally means "too many FRRs".  The first two explanations imply
that's your own fault.  But maybe there's a situation where the system
needs 14 entries at once.. who knows?

SETFRR has no return code, just the abend.  So I assume this is considered
an extremely pathological condition.

sas

On Fri, Jan 6, 2017 at 7:44 AM, Peter Relson  wrote:

> 
> Is there
> some programmable way I can determine how many are free (if only 1, I
> would
> prefer to have it at the PC level)?
> 
>
> There is of course a programmable way, but there is nothing that is a
> programming interface.
>
> The FRR stack is not complex. There is a pointer to where the first entry
> would go, there is a pointer to the current entry. And each entry is of
> fixed size.
>
> 
> >>The manual states   "The system only guarantees that installations can
> add two FRRs"
> >>Is that still true for zOS 2?
> >Yes it is still true.
>
> Thanks! I have searced around, but in what book is that written?
> 
>
> I assume that it is wherever Binyamin found it; I do not happen to know
> off-hand.
>
> Peter Relson
> z/OS Core Technology Design
>
>
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>



-- 
sas

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Re: How many FRR stack entries are available?

[Peter Relson]

Is there
some programmable way I can determine how many are free (if only 1, I 
would
prefer to have it at the PC level)?


There is of course a programmable way, but there is nothing that is a 
programming interface.

The FRR stack is not complex. There is a pointer to where the first entry 
would go, there is a pointer to the current entry. And each entry is of 
fixed size.


>>The manual states   "The system only guarantees that installations can 
add two FRRs"
>>Is that still true for zOS 2?
>Yes it is still true.

Thanks! I have searced around, but in what book is that written?


I assume that it is wherever Binyamin found it; I do not happen to know 
off-hand.

Peter Relson
z/OS Core Technology Design


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Re: How many FRR stack entries are available?

[Binyamin Dissen]

I am writing code that is called by the end-user in SRB mode, and the code
will issue a PC. The caller may very well have its own FRR.

I would like to have the API have an FRR as well as the PC routine. Is there
some programable way I can determine how many are free (if only 1, I would
prefer to have it at the PC level)?

On Thu, 5 Jan 2017 08:06:19 -0500 Peter Relson  wrote:

:>
:>The manual states
:>   "The system only guarantees that installations can add two FRRs"
:>Is that still true for zOS 2?
:>
:>
:>Yes it is still true. That is not a statement about how much room there is 
:>for FRRs overall in the FRR stack (which, as it has long been, is 16 
:>entries worth).
:>
:>Peter Relson
:>z/OS Core Technology Design
:>
:>
:>--
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:>send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN

--
Binyamin Dissen 
http://www.dissensoftware.com

Director, Dissen Software, Bar & Grill - Israel


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Re: How many FRR stack entries are available?

[Elardus Engelbrecht]

Peter Relson wrote:

>>The manual states   "The system only guarantees that installations can add 
>>two FRRs"
>>Is that still true for zOS 2?
>Yes it is still true.

Thanks! I have searced around, but in what book is that written?


> That is not a statement about how much room there is for FRRs overall in the 
> FRR stack (which, as it has long been, is 16 entries worth).

I see in 'z/OS MVS Diagnosis: Reference' (z/OS v2.1) this other, but limit: 
'There is always one set of FRR stacks per processor.'

So how does it relate to what you wrote?

Just curious if you dont mind please!

Groete / Greetings
Elardus Engelbrecht

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Re: How many FRR stack entries are available?

[Peter Relson]

The manual states
   "The system only guarantees that installations can add two FRRs"
Is that still true for zOS 2?


Yes it is still true. That is not a statement about how much room there is 
for FRRs overall in the FRR stack (which, as it has long been, is 16 
entries worth).

Peter Relson
z/OS Core Technology Design


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How many FRR stack entries are available?

[Binyamin Dissen]

The manual states

   "The system only guarantees that installations can add two FRRs"

Is that still true for zOS 2?

--
Binyamin Dissen 
http://www.dissensoftware.com

Director, Dissen Software, Bar & Grill - Israel


Should you use the mailblocks package and expect a response from me,
you should preauthorize the dissensoftware.com domain.

I very rarely bother responding to challenge/response systems,
especially those from irresponsible companies.

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