Article View: comp.arch
Article #13238uP Figure of Merit
From: Gilman Chesley
Date: Wed, 18 Mar 1987 19:06
Date: Wed, 18 Mar 1987 19:06
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I don't want to flog a dead discussion (Kwh per Mhz) but with the advent of
the Am29000 the need still exists to evaluate single chip microprocessors
independently of the process generation, so I would like to suggest a figure
of merit for microprocessors: DHRYSTONES*microns^2.
The basic argument is that to normalize for process generation one should
adjust for density, which would then give a rough figure of merit for
architecture/implementation. For example, Figures 2 and 8 of Myers, et al,
MICROPROCESSOR TECHNOLOGY TRENDS, Proc. IEEE, Dec. 1986 show a good
correlation between the increase per year in the number of microprocessor
transistors and MIPS: a constant 10 IPS per transistor. Presumably an
architecture significantly over that ratio is more effective than one
significantly under that.
Gil Chesley {usual disclaimer}
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Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Path: arc1-ca.pugleaf.net!utzoo!mnetor!seismo!rutgers!ames!ucbcad!ucbvax!decvax!decwrl!pyramid!oliveb!sun!pajaro!gil From: gil%pajaro@Sun.COM (Gilman Chesley) Newsgroups: comp.arch,comp.lsi Subject: uP Figure of Merit Message-ID: <15252@sun.uucp> Date: Wed, 18-Mar-87 14:06:50 EST Article-I.D.: sun.15252 Posted: Wed Mar 18 14:06:50 1987 Date-Received: Fri, 20-Mar-87 02:39:28 EST Sender: news@sun.uucp Lines: 15 Keywords: microprocessors, performance, figure of merit