cellular multiprocessing

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cellular multiprocessing

(architecture, parallel)
(CMP) The partitioning of processors into separate computing environments running different operating systems.

The term cellular multiprocessing appears to have been coined by Unisys, who are developing a system where computers communicate as clustered machines through a high speed bus, rather than through communication protocols such as TCP/IP.

The Unisys system is based on Intel processors, initially the Pentium II Xeon and moving on to the 64-bit Merced processors later in 1999. It will be scalable from four up to 32 processors, which can be clustered or partitioned in various ways. For example a sixteen processor system could be configured as four Windows NT systems (each functioning as a four-processor symmetric multiprocessing system), or an 8-way NT and 8-way Unix system.

Supported operating systems will be Windows NT, SCO's Unixware 7.0, Unisys' SVR4 Unix and possibly the OS2200 and MCP-AS mainframe operating systems (with the assistance of Unisys' own dedicated chipset).

This article is provided by FOLDOC - Free Online Dictionary of Computing (foldoc.org)


(1) Formerly CMP Media, CMP was acquired by United News and Media in 1999. See UBM.

(2) (Cellular MultiProcessing) An earlier multiprocessing architecture for Intel CPUs from Unisys. Providing up to 32 processors that are crossbar connected to 64GB of memory and 96 PCI cards, a CMP system provided mainframe-like architecture using Intel CPUs. CMP supported Windows NT and 2000 Server, AIX, NetWare and UnixWare and could run as one large SMP system or multiple systems with different operating systems. See SMP.

Eight Subpods, Four Crossbars
A CMP subpod contained four x86 or Itanium CPUs, which connected through a third-level memory cache to the crossbar. Each crossbar supported two subpods, two direct I/O bridges (DIBs) and connected to four memory storage units (MSUs). This diagram shows the four crossbars and all eight subpods that made up a complete CMP system.
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Based on the Unisys Cellular MultiProcessing (CMP) architecture, the ES7000 scales up to 32 Intel processors in Microsoft Windows 2000 and Windows Server 2003 Datacenter Edition operating environments.
The Unisys ES7000 is based on the Unisys Cellular MultiProcessing (CMP) server architecture, which provides an array of computing capabilities required for enterprise-class e-business computing that are well known to users of large-scale computers, but unprecedented in computing environments using Microsoft and Intel technology.
Some of the systems that support partitioning are Sequent's Application Region Manager [Sequent Computer Systems 2000], Sun Microsystems' Dynamic System Domains [Sun Microsystems 2000], and Unisys' Cellular MultiProcessing (CMP) architecture [Unisys 2000].
Unisys has also been eager to get its CMP cellular multiprocessing architecture to market in the ES7000 server which was also announced yesterday.
Part of the new extension to the ES7000 server line announced recently, the server's score reflects the price/performance benefits achieved through the compact, modular adaptation of the Unisys Cellular MultiProcessing server architecture, which includes the ability to scale up to 32 processors.
Designed for the power of future Intel Itanium processors, the ES7000 is based on the revolutionary Unisys Cellular MultiProcessing (CMP) architecture.

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