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- From: glew@pdx007.intel.com (Andy Glew)
- Newsgroups: comp.sys.intel,comp.arch
- Subject: Re: Superscalar vs. multiple CPUs ?
- Message-ID: <GLEW.92Dec12150832@pdx007.intel.com>
- Date: 12 Dec 92 23:08:32 GMT
- References: <WAYNE.92Dec4093422@backbone.uucp> <37595@cbmvax.commodore.com>
- <1992Dec7.012026.11482@athena.mit.edu>
- <1992Dec8.000357.26577@newsroom.utas.edu.au>
- <PCG.92Dec9154602@aberdb.aber.ac.uk>
- Sender: news@ichips.intel.com (News Account)
- Organization: Intel Corp., Hillsboro, Oregon
- Lines: 37
- In-Reply-To: pcg@aber.ac.uk's message of 9 Dec 92 15:46:02 GMT
-
-
- Well, certain tricks can also be used with multiple CPUs on the same
- die. And these have an important advantage: as far as I can see, 6
- instruction issue per cycle is virtually pointless. The *limit* of
- superscalarity present in general purpose codes is 4, and actually we
- are hard pressed to find many codes with superscalarity higher than 2.
-
- Dave Ditzell, at Micro-25, quoted Larry Wall at ASPLOS:
-
- "The amount of attainable parallelism is directly proportional to the
- year of publication."
-
- To which Ditzell adds (paraphrased):
-
- <<The conference where research is being published apparently must
- also be factored in to the amount of attainable parallelism. Micro
- papers have more parallelism than ASPLOS papers.>>
-
-
-
- For those who don't follow the conferences, Micro (the Conference on
- Microarchitecture [with Microprogramming added in very small letters
- for historical reasons]) has traditionally been the conference for new
- work in superscalar, and compilers for same. Micro was a backwater
- for a while, while pipelined RISCs grabbed the spotlight, but Micro
- has become much more interesting as superscalar has become standard
- practice.
- --
-
- Andy Glew, glew@ichips.intel.com
- Intel Corp., M/S JF1-19, 5200 NE Elam Young Pkwy,
- Hillsboro, Oregon 97124-6497
-
- This is a private posting; it does not indicate opinions or positions
- of Intel Corp.
-
- Intel Inside (tm)
-