Article View: comp.arch
Article #2862Re: GOTO considered essential??
From: Bill Mangione-Smith
Date: Fri, 27 Oct 1989 13:28
Date: Fri, 27 Oct 1989 13:28
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1609 bytes
In article <1989Oct27.050923.5294@ico.isc.com> rcd@ico.isc.com (Dick Dunn) writes:
>The
>processor may be able to issue 5 instructions in some ideal cycle, but it
>does NOT run at 5 instructions/cycle for any believable piece of code!
>
>Dick Dunn rcd@ico.isc.com uucp: {ncar,nbires}!ico!rcd (303)449-2870
> ...No DOS. UNIX.
In all of the writings I have seen, including the iccd paper, the stated
performance goal is something just over 1 instruction issued per clock. To
do this with 'real' code, you obviously need a peak issue rate of over 1
instruction per clock. IBM, atleast the R&D types, doesn't seem to be
trying to fool anyone that the actual performance is anywhere near
4 or 5 instructions per clock. But then something like 1.3 instructions/clock
for *real live code* would be a big step up in performance anyway.
Have you been talking to sales guys? Or which magazines are making these claims?
bill mangione-smith
advanced computer architecture lab
university of michigan
ann arbor
billms@dip.eecs.umich.edu
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Path: arc1-ca.pugleaf.net!utzoo!attcan!utgpu!jarvis.csri.toronto.edu!mailrus!um-math!sharkey!umich!dip.eecs.umich.edu!billms From: billms@dip.eecs.umich.edu (Bill Mangione-Smith) Newsgroups: comp.arch Subject: Re: GOTO considered essential?? Message-ID: <662@zip.eecs.umich.edu> Date: 27 Oct 89 13:28:25 GMT References: <1989Oct27.050923.5294@ico.isc.com> Sender: news@zippy.eecs.umich.edu Reply-To: billms@dip.eecs.umich.edu.UUCP (Bill Mangione-Smith) Distribution: na Organization: University of Michigan EECS Dept., Ann Arbor, MI Lines: 24