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- Newsgroups: comp.arch
- Subject: Re: More Alpha AXP Performance Numbers
- Message-ID: <Bxo6rI.C89.2@cs.cmu.edu>
- From: lindsay+@cs.cmu.edu (Donald Lindsay)
- Date: Fri, 13 Nov 1992 19:42:54 GMT
- Sender: news@cs.cmu.edu (Usenet News System)
- References: <1992Nov10.204139.5148@ryn.mro4.dec.com> <1992Nov13.140907.2304@athena.mit.edu>
- Organization: School of Computer Science, Carnegie Mellon
- Nntp-Posting-Host: gandalf.cs.cmu.edu
- Lines: 30
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-
- solman@athena.mit.edu (Jason W Solinsky) writes:
- >why aren't there any multi-processing configurations available?
-
- The initial desktop model is uniprocessor, but the high end model has
- up to 6 CPUs. Some intermediate models have 2 CPUs.
-
- >Based on this data, it is extraordinarily unclear why somebody would
- >be willing to go for the 10000 box when the 3000 delivers better than
- >half the performance at a TINY fraction of the price.
-
- Probably for the same reason one would buy an Amdahl - big IO, big
- memory, big caches, and presumably, big transactions/second on the
- TPC benchmark. In short, the top of the line is a mainframe, not a
- supercomputer. DEC can fit 1 GB of DRAM in the deskside model: the
- bigger model probably has more than that in its *minimum*
- configuration.
-
- The cycles side of the computing world is getting noticeably flatter.
- The 360 series spanned a very large performance range, but now the
- chip on your desk (be it HP or DEC) can be a derated copy of the
- engine in the vendor's "mainframe". HP makes the difference more
- obvious by having a different OS for the "business" versions, but
- Cobol compilers notwithstanding, it's the same chip.
-
- This is, of course, a tremendous price break to people who want the
- MIPS/MFLOPS but not the memory and IO. We are in luck. But didn't
- Seymour Cray say that the processor is the easy part?
- --
- Don D.C.Lindsay Carnegie Mellon Computer Science
-