In <[email protected]>, on
12/23/2015
at 09:46 AM, Jerry Callen <[email protected]> said:
>I'm in the process of hand-tuning a small, performance critical
>algorithm on a Z13,
Lather, rinse, repeat every time you change processors.
>and I'm hampered by the lack of detailed
>information on the instruction-level performance of the machine.
Be careful what you ask for; you might get it.
>Back in the day, IBM used to publish a "Functional Characteristics"
>manual for each CPU model that provided this information;
Except when it was in a separate timing manual.
Every time that IBM introduced a new processor the timing formulæ
became more complicated. I suspect that a timing manual for the z13
would be massive.
--
Shmuel (Seymour J.) Metz, SysProg and JOAT
ISO position; see <http://patriot.net/~shmuel/resume/brief.html>
We don't care. We don't have to care, we're Congress.
(S877: The Shut up and Eat Your spam act of 2003)
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