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- From: bt@irfu.se (Bo Thide')
- Newsgroups: comp.benchmarks
- Subject: Re: DEC ALPHA Performance Claims
- Message-ID: <1992Nov16.162408.7070@irfu.se>
- Date: 16 Nov 92 16:24:08 GMT
- References: <BxH7s7.5Cv@inews.Intel.COM> <4248@bcstec.ca.boeing.com>
- Organization: Swedish Institute of Space Physics, Uppsala, Sweden
- Lines: 39
-
- In article <4248@bcstec.ca.boeing.com> silverm@bcstec.ca.boeing.com (Jeff Silverman) writes:
- >There is a lot of discussion on this thread about hardware vs. software speed
- >up. I suspect that the question is moot. One of the features, attributes,
- >whatever of the Alpha is that the compiler is supposed to sort instructions
- >so that the hardware pipeline works optimally. This means that, for all
- >intents and purposes, the compiler and the CPU are closely coupled in a
- >new and unique way. It also has some rather interesting side effects:
- >
- >1) Newer implementations of the alpha may need or take advantage of new ways
- >of ordering instructions. This in turn means that different alpha
- >implementations may need or take advantage of different executables or object
- >modules, each compiled for its own processor. Or maybe the processors will
- >take a performance hit in the name of portability. Who can say?
- >
- >2) It will be interesting to see if third party vendors come out with language
- >processors (I.e. compilers) for the Alpha, if the compiler and the CPUs are
- >so intimately familiar with one another.
- >
- >I don't know enough about the Alpha to answer these questions - and it may
- >be the case that the questions won't be answerable until somebody tries.
- >One test will be to measure how long it takes for somebody to announce an
- >Ada for the Alpha. We'll see.
- >
- >Jeff Silverman, Boeing.
- >
-
-
- This raises a question: Were these numbers obtained with the standard
- compiler(s) that are shipping with every system? HP claim this to be the
- case for their published specmark ratings for the 7x5 family.
-
-
- Bo
- --
- ^ Bo Thide'--------------------------------------------------------------
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