Very Efficient Speculative Parallel Architecture

<project>

(VESPA, Portuguese for "wasp") An Edinburgh University project using speculative multithreading to improve single-application and multiprogramming performance, and to increase fault tolerance and reliability. The project aims to develop a compilation environment to generate efficient speculative parallel code, including speculative parallelisation and speculative helper threads. Other research involves the development of optimized thread-level speculative architectures and novel uses of speculative multithreading, such as fault-tolerance.

VESPA Home.

Last updated: 2008-04-04

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Very Efficient Speculative Parallel ArchitectureVery high bit-rate Digital Subscriber Line

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Very high bit-rate Digital Subscriber Line

<communications, protocol>

(VDSL) A form of Digital Subscriber Line similar to ADSL but providing higher speeds at reduced lengths.

Last updated: 1998-05-18

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Very high bit-rate Digital Subscriber LineVery Large Database

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Very Large Database

<database>

(VLDB) A database that can use a Very Large Memory model to keep as much data as possible in physical memory.

(Oracle http://oracle.com/platforms/dec/collateral/vlmwp_3.html).

Last updated: 1998-07-07

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Very high bit-rate Digital Subscriber LineVery Large DatabaseVery Large Memory

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Very Large Memory

<architecture>

(VLM) A processor and operating system that can use more than 4GB of RAM, which is the limit for systems using 32-bit addresses.

VLM architectures allow application programs and Very Large Databases with more than 4GB of data to be placed entirely in physical memory, with large performance enhancements.

Some recent processors like the DEC Alpha can process 64 bits of data at a time and use addresses wider than 32 bits.

Digital Unix.

(Solaris http://sun.com/solaris/64bit.html).

(SGI http://sgi.com/Technology/standard/faq.html).

(Unix 98 http://UNIX-systems.org/version2/whatsnew/login_64bit.html).

[How wide are the address busses?]

Last updated: 1998-07-07

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Very Large DatabaseVery Large MemoryVery Large Scale Integration

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Very Large Scale Integration

<hardware>

(VLSI) A term describing semiconductor integrated circuits composed of hundreds of thousands of logic elements or memory cells.

Last updated: 1995-01-11

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Very Large MemoryVery Large Scale IntegrationVery Long Instruction Word

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Very Long Instruction Word

<language, architecture>

(VLIW) Used to describe a machine code instruction set implemented using horizontal microcode. A horizontally encoded instruction word which encodes four or more operations might be considered "very long".

VLIW architectures are sometimes classified as a type of static superscalar architecture. They are static in the sense that which units operate in parallel is determined by the instruction rather than by dynamic scheduling at run time.

Producing code for VLIW machines is difficult; trace scheduling is a helpful compiler technique.

The most famous VLIW machine was built by (the late) Multiflow Computer, Inc.

Last updated: 1994-11-11

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Very Large Scale IntegrationVery Long Instruction WordVery Small Aperture Terminal

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Very Small Aperture Terminal

<communications>

(VSAT) A kind of ground station used to contact a communications satellite such as INMARSAT.

Last updated: 1995-03-28

Nearby terms:

Very Long Instruction WordVery Small Aperture TerminalVESA

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