Perhaps what might be useful would be an assembler program to run loops
of individual instructions and output some timing information.
/Tom
On 12/23/2015 11:20, Shmuel Metz (Seymour J.) wrote:
In <8970116796168447.wa.jcallennarsil....@listserv.ua.edu>, on
12/23/2015
at 09:46 AM, Jerry Callen <jcal...@narsil.org> 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.
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