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From: anton@mips.complang.tuwien.ac.at (Anton Ertl)
Newsgroups: comp.arch
Subject: Re: Why VAX Was the Ultimate CISC and Not RISC
Date: Sun, 02 Mar 2025 12:03:58 GMT
Organization: Institut fuer Computersprachen, Technische Universitaet Wien
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Lawrence D'Oliveiro <ldo@nz.invalid> writes:
>How many clocks did Alpha take to process each instruction?

For the 21064 see slide 15 of
<https://people.eecs.berkeley.edu/~randy/Courses/CS252.S96/Lecture19.pdf>

I.e., about 1 CPI for Ear, and about 4.3 CPI for TCP-B, with other
benchmarks in between.

Theoretical bottom CPI (peak performance) of the 21064 is 0.5.

- anton
-- 
'Anyone trying for "industrial quality" ISA should avoid undefined behavior.'
  Mitch Alsup, <c17fcd89-f024-40e7-a594-88a85ac10d20o@googlegroups.com>