A z13 Core in SMT mode has two "CPUs" per "CORE ID" in ZIP and IFLs.

Barry

-----Original Message-----
From: IBM Mainframe Discussion List [mailto:[email protected]] On Behalf 
Of Tom Marchant
Sent: Friday, March 13, 2015 9:33 PM
To: [email protected]
Subject: Re: Need assembler trick to quickly get second and third DS qualifiers

On Fri, 13 Mar 2015 18:50:44 -0500, Mike Schwab wrote:

>Maybe the z13 will execute multiple bytes in parallel?  One byte being 
>looked up per core.

A core is a CPU. You are proposing running two tasks (or SRBs).

>Then a cycle to check the condition codes and how many to accept.

And you want to cross-check the results of two tasks, and synchronize them? 
And split off another task on the fly? What makes you think that there is 
another processor available to you? Or maybe you mean two threads on the same 
core? 
It still looks essentially like two processors.

--
Tom Marchant

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