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Topic: Symmetric multiprocessing


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GSM
SMP

  
 [No title]
Multiprocessing can be used to address several different system objectives, for example, to provide higher system availability: in case of a cpu failure, the other cpu(s) in the system continue operating.
As mentioned, these types of locks don't usually require modification for a multiprocessing environment (although the scheduler interlock may come into play when making these resources visible to the scheduler when such a lock is relinquished), but it may be advantageous to introduce additional locks of this type when implementing symmetric multiprocessing.
TOPS-10 multiprocessing moved from an early master/slave approach to Symmetric Multiprocessing, which is more general and provides especially attractive benefits in terms of system performance and availability, and also has economic and administrative advantages.
www.inwap.com /pdp10/paper-smp.txt   (10965 words)

  
 iqexpand.com   (Site not responding. Last check: 2007-10-07)
Multiprocessing is traditionally known as the use of multiple concurrent processes in a system as opposed to a single process at any one instant.
Multiprocessing for general tasks is often fairly difficult to achieve due to various programs holding internal data, known as state (or context).
Multiprocessing is a generic term for the use of two or more central processing units (CPUs) within a single computer system.
multiprocessing.iqexpand.com   (707 words)

  
 [No title]
By contrast, for the DEC OSF/1 multiprocessing design, the concept of a master processor applies only to the keeping of the global system time and to other specialized uses (such as supporting subsystems that are not yet fully symmetric).
During multiprocessing development, locking strategies were designed to o Reduce the total number of locks per subsystem o Reduce the number of locks taken per subsystem operation o Improve the level of parallelism throughout the kernel At times, these goals clashed: enhancing parallelism usually involves adding a lock to some structure or code path.
Before the advent of multiprocessing, the CPU number was a compile-time constant, so that thread-state lookup involved simply reading a global variable to form the pointer to the data.
people.freebsd.org /~fsmp/SMP/files/DTJF03SC.TXT   (8408 words)

  
 ITworld.com - LINUX TIPS AND TRICKS - Scalability and Symmetric Multiprocessing
One of the most important kernel features is Symmetric Multiprocessing (SMP) support.
Multiprocessing is hardly new -- multiprocessor machines have been around for decades.
Multiprocessing: This means that the system consists of multiple identical CPUs.
www.itworld.com /nl/lnx_tip/03302001/pf_index.html   (437 words)

  
 What is multiprocessing? - A Word Definition From the Webopedia Computer Dictionary
Multiprocessing operating systems enable several programs to run concurrently.
UNIX is one of the most widely used multiprocessing systems, but there are many others, including OS/2 for high-end PCs.
Multiprocessing systems are much more complicated than single-process systems because the operating system must allocate resources to competing processes in a reasonable manner.
www.webopedia.com /TERM/o/multiprocessing.htm   (154 words)

  
 The Old New Thing : The "symmetric" in symmetric multiprocessing really means "symmetric"
The Windows NT family of operating systems supports symmetric multiprocessing.
All the processors have to be the same speed, the same stepping, the same manufacturer.
It's very annoying, but my guess is that adding a fix to the CPU just so that developers get reliable cycle counters is not a priority for the manufacturer (so far I only have reports about one chip maker).
blogs.msdn.com /oldnewthing/archive/2006/02/15/532524.aspx   (1512 words)

  
 [No title]
In addition, the symmetric multiprocessor approach creates a program development environment that is easier to use when an application requires multiple processors to accomplish its task.
Advantages of Symmetric Multiprocessing A symmetric multiprocessor (SMP) is defined as a set of processors that share a common pool of memory.
The use of a symmetric multiprocessor (SMP) architecture, which has the ability to route interrupts to particular processors, allows an interrupt handling implementation that achieves both determinism and high I/O throughput.
www.ccur.com /isddocs/reprints-Sym-Muliprocessing.doc   (3024 words)

  
 How to adapt traditional RTOSes to symmetric multiprocessing   (Site not responding. Last check: 2007-10-07)
As the shift is made to more diverse, heterogeneous multiprocessing, the big questions facing developers include: what changes will have to be made to the applications developed for such environments, to the tools and the underlying OS structure.
In Symmetric Multi-Processors, or SMP., all processors (generally configured in pairs, or groups of 4) are identical and share a set of resources.
Obviously, multicore and multiprocessing applications are going to become much more complex and will require RTOSes much more adapted to their needs.
www.embedded.com /shared/printableArticle.jhtml?articleID=174913768   (2005 words)

  
 LANSA For Windows and Symmetric Multiprocessing Systems   (Site not responding. Last check: 2007-10-07)
Multiprocessing systems have multiple CPUs and can execute more than one set of machine instructions at a time.
Symmetric multiprocessing (SMP) systems apply multiple identical processors to a task.
Symmetric multiprocessing systems are servers that service hundreds of end users.
www.lansa.com /support/tips/t0199.htm   (901 words)

  
 Cellular Multiprocessing Architecture
A CMP-based platform can be configured as one large symmetric multiprocessing (SMP) system or as multiple (up to eight) SMP partitions.
The Unisys Cellular MultiProcessing (CMP) architecture is a hardware and software design that allows the Microsoft Windows NT and Windows 2000 operating environments to more readily support mission-critical solutions.
The Cellular MultiProcessing system design includes high-performance Intel processors that can be configured as a single, high-end Symmetric MultiProcessing (SMP) system or partitioned into multiple clustered nodes.
www.unimetrix.com /CMT.htm   (782 words)

  
 ASMP vs. SMP   (Site not responding. Last check: 2007-10-07)
In asymmetric multiprocessing the program tasks (or threads) are strictly divided by type between processors and typically, each processor has its own memory address space.
Symmetric multiprocessing (SMP) is the most common configuration of multiple processors.
The processors are symmetric, that is, they can do anything the others can.
www.ipv7.net /ohlandl/CPU/ASMP_SMP.html   (594 words)

  
 UNIX® Systems for Modern Architectures: Symmetric Multiprocessing and Caching for Kernel Programmers - $45.49   (Site not responding. Last check: 2007-10-07)
Symmetric multiprocessing and cache memory systems are important cost-effective technologies for improving performance in today's state-of-the-art systems.
Written for the UNIX kernel developer, this book provides a complete yet comprehensible explanation of the operation of caches and symmetric multiprocessors, how they work together, and the issues operating systems must address in order to run on the machines that incorporate them.
It examines the problems these multiprocessors present to the operating system, such as race conditions, deadlocks, and the ordering of memory operations, and looks at how the UNIX kernel can be adapted to run on such systems.
www.awprofessional.com /catalog/product.asp?product_id={963653BF-E0CC-42A4-9264-4263A2237562}   (1440 words)

  
 General Micro Systems ships the fastest multiprocessor CPU board   (Site not responding. Last check: 2007-10-07)
Atlas-C provides built-in support for symmetric and real-time asymmetric multiprocessing, which enables its two Coppermine-256 processors to work together in parallel on the same program, transparent to the programmer and the application.
Symmetric multiprocessing, which leverages SMP facilities built into Windows NT, Solaris and Linux, is ideal for SIMD (Single Instruction Multiple Data) applications like graphics and imaging because it enables multiple CPUs to work concurrently on the same program thread, symmetric multiprocessing.
Asymmetrical multiprocessing is an innovative form of de-coupled multiprocessing based on GMS' new RAMP (Real-time Asymmetric Multi Processing) technology.
www.hoise.com /primeur/00/articles/monthly/AE-PR-06-00-61.html   (426 words)

  
 Define SMP - a definition from Whatis.com - see also: symmetric multiprocessing   (Site not responding. Last check: 2007-10-07)
SMP (symmetric multiprocessing) is the processing of programs by multiple processors that share a common operating system and memory.
In symmetric (or "tightly coupled") multiprocessing, the processors share memory and the I/O bus or data path.
A single copy of the operating system is in charge of all the processors.
searchdatacenter.techtarget.com /sDefinition/0,,sid80_gci214218,00.html   (217 words)

  
 Bringing SMP to Your UP Operating System   (Site not responding. Last check: 2007-10-07)
This tutorial is intended as a supplement to the SigOps OS Tutorial to teach the fundamentals of symmetric multprocessing using Intel MP compliant hardware.
Knowledge of the concepts and implementations of basic operating system parts such as managing virtual memory and multitasking are assumed and will not be discussed except as they relate to multiprocessing.
Permission is granted to make verbatim copies of this tutorial for non-commercial use provided this notice remains intact on all copies.
www.cheesecake.org /~sac/smp.html   (2183 words)

  
 Symmetric multi-processing system utilizing a DMAC to allow address translation for attached processors (US6907477)
Symmetric multi-processing system with attached processing units being able to access a shared memory without being structurally configured with an address translation mechanism
Multiprocessing packet switching connection system having provision for error correction and recovery
US6779049 issued 2004-08-17 Symmetric multi-processing system with attached processing units being able to access a shared memory without being structurally configured with an address translation mechanism
www.delphion.com /details?pn=US06907477__   (651 words)

  
 QNX Product Overview
The bandwidth explosion is putting extreme demands on the network control-plane processor, to the point where the fastest CPU struggles to keep pace.
SMP is a specific implementation of multi-processing whereby multiple CPUs share the same board, memory, peripherals, resources and operating system (OS), physically connected via a common high speed bus.
In a true symmetric multiprocessing environment, there are no incremental hardware requirements, other than for the additional CPUs.
www.qnx.com /tech_highlights/symmetric_multiprocessing   (527 words)

  
 [No title]   (Site not responding. Last check: 2007-10-07)
Symmetric I/O Mode The hardware must support a mode of operation in which the system can switch easily to Symmetric I/O mode from PIC or Virtual Wire mode.
For example, connecting the floating point error signal from application processors to IRQ13 can be useful in the case of a platform that supports dynamic choice of BSP during boot.
In symmetric mode, a compliant system supports only on-chip floating point units, with error signaling via interrupt vector 16.
www.ibiblio.org /pub/Linux/docs/HOWTO/SMP-HOWTO   (7022 words)

  
 OpenVMS Programming Concepts Manual   (Site not responding. Last check: 2007-10-07)
This chapter presents a brief overview of symmetric multiprocessing terms and characteristics.
A multiprocessing system consists of two or more CPUs that address common memory and that can execute instructions simultaneously.
Because a process executes on only one processor at a time, synchronization of threads of execution within a process is unaffected by whether the process runs on a uniprocessor or on a symmetric multiprocessing (SMP) system.
www.cuis.edu /doc_vms_html/000000/731final/5841/5841pro_016.html   (3569 words)

  
 Linux News: Developer : ARM Announces Integrated Multiprocessor Core
Multiprocessing is widely used for demanding applications that execute multiple tasks at the same time, such as consumer entertainment and convergence devices in the home.
The MPCore multiprocessor supports up to four-way symmetric multiprocessing, up to four-way asymmetric multiprocessing or any combination of both.
The MPCore multiprocessor is based on the ARMv6 architecture, with media extensions for next-generation, rich-multimedia devices and ARM Jazelle Java acceleration.
www.linuxinsider.com /story/developer/33835.html   (853 words)

  
 Processor subsystem interconnect architecture for a large symmetric multiprocessing system
The z990 system comprises one to four book packages; each book package is a pluggable unit containing up to 12 processors and up to 64 GB of memory, I/O adapters, and a centralized switch and coherency manager known as the system control element (SCE), through which the processors and I/O connect.
The SCE includes a second-level cache (L2 cache) and a pipelined switch that manages data routing and maintains strong storage coherency across the multiprocessing system.
The shared L2 cache is interposed in the storage hierarchy between a private L1 cache dedicated to each processor and the fully shared, fully coherent memory of the z990.
www.research.ibm.com /journal/rd/483/mak.html   (7533 words)

  
 SysOpt Forums - Symmetric/asymmetric multiprocessing   (Site not responding. Last check: 2007-10-07)
The content of the discussion left me convinced that Linux actually handled multiprocessing even beyond what WinNT could do.
However all of the published references on Linux (Que, Sams, etc.) make no reference to multiprocessing.
I talked to a casual but reliable source for computing and he said that Linux does NOT handle multiprocessing.
www.sysopt.com /forum/archive/index.php/t-66449.html   (443 words)

  
 ISS X-Force Database: bsdi-smp-dos(3145): Denial of service in BSDi 4.0.1 with Symmetric Multiprocessing   (Site not responding. Last check: 2007-10-07)
BSDi 4.0.1 is vulnerable to a local denial of service attack caused by a vulnerability with Symmetric Multiprocessing (SMP).
BugTraq Mailing List, Tue, 17 Aug 1999 03:12:28 -0700, Symmetric Multiprocessing (SMP) Vulnerbility in BSDi 4.0.1 at http://archives.neohapsis.com/archives/bugtraq/1999-q3/0469.html.
CVE-1999-0747: Denial of service in BSDi Symmetric Multiprocessing (SMP) when an fstat call is made when the system has a high CPU load.
xforce.iss.net /xforce/xfdb/3145   (264 words)

  
 [No title]   (Site not responding. Last check: 2007-10-07)
The Pentium® Pro processor enabled a new generation of symmetric multiprocessing servers.
Symmetric Multiprocessing (SMP) Defined SMP treats all processors as equals.
Any processor can do the work of any other processor, and applications are divided into threads that can run concurrently on any available processor.
medix.marshall.edu /~mccarthy/tm660/Lecture03_ComputingPlatforms/A3_JohnGilaspy_SMP.doc   (1965 words)

  
 Data access methods: overview
Parallel table scan method (available only when the DB2 UDB Symmetric Multiprocessing feature is installed)
All columns used in the query exist as key columns and DB2 UDB Symmetric Multiprocessing is installed.
If DB2 UDB Symmetric Multiprocessing is installed, possible exploitation of SMP parallelism.
www.redbooks.ibm.com /pubs/html/as400/v4r5/ic2924/info/db2/rzajqmstdaccessm.htm   (511 words)

  
 HP Journal - Symmetric Multiprocessing Workstations and Servers System-Designed for High Performance and Low Cost
HP Journal - Symmetric Multiprocessing Workstations and Servers System-Designed for High Performance and Low Cost
Symmetric Multiprocessing Workstations and Servers System-Designed for High Performance and Low Cost
The HP 9000 Series 700 J-class workstations provide up to 2-way symmetric multiprocessing, while the HP 9000 Series 800 K-class servers (technical servers, file servers) and HP 3000 Series 9x9KS business-oriented systems provide up to 4-way symmetric multiprocessing.
www.hpl.hp.com /hpjournal/96feb/feb96a1.htm   (152 words)

  
 Kernel, Symmetric Multiprocessing, Virtual Memory, and Device Support
This chapter discusses the Tru64 UNIX kernel, symmetric multiprocessing, the virtual memory subsystem, and support for hardware devices.
Additionally, it provides the opportunity to extend the life and increase the cost-effectiveness of multiprocessor systems by adding CPU cards (and their compute power) to multiprocessors rather than buying more systems.
Instead, it can be faulted in when the device is first accessed.
www.helsinki.fi /atk/unix/dec_manuals/DOC_51/HTML/ARH8XCTE/VMCHPTXX.HTM   (2824 words)

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