On Sun, 8 Feb 2026 03:33:03 +0000, Eric Rossman wrote:

>It is safe. CSNBOWH only uses CPACF for SHA-1 (and SHA-2/SHA-3).
>
>For some of the other CSNBOWH rules, we do use software but none of the rules 
>use CEX coprocessors, which is why the service is not in the CICS WAITLIST 
>(CSFWTL01). Any service in CSFWTL01 could potentially get suspended so needs 
>to be off the QR task but CSFOWH (CSNBOWH) is not one of those services.
>    ...
How is contention for that coprocessor mediated?
o FIFO (like ENQ)?
o By dispatch priority of requestor?
o Other?

Is it affected by "nice"?
<https://www.ibm.com/docs/en/zos/3.2.0?topic=descriptions-nice-run-command-different-priority>

(I suspect similar considerations night apply to STCK.)

-- 
gil

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