Image Openmp.png right 180px thumb OpenMP logo OpenMP Open Multi Processing is an application programming ..., OpenMP is a portable, scalable model that gives programmer s a simple and flexible interface ... both OpenMP and Message Passing Interface MPI , or more transparently through the use of OpenMP extensions ... be achieved using OpenMP in this way. The runtime environment allocates threads to processors depending ... environment based on environment variables or in code using functions. The OpenMP functions are included in a header file labelled omp.h in C programming language C C . History The OpenMP Architecture Review Board ARB published its first API specifications, OpenMP for Fortran 1.0, in October 1997 ... mp documents spec30.pdf OpenMP 3.0 specifications . On February 7, 2011, the draft of http www.openmp.org ... specification of Version 3.1 is expected for June 2011. The core elements Image OpenMP language extensions.svg center 530px thumb Chart of OpenMP constructs. The core elements of OpenMP are the constructs ... synchronization, user level runtime routines and environment variables. In C C , OpenMP uses C preprocessor Compiler specific preprocessor features pragmas . The OpenMP specific pragmas are listed ... OpenMP clauses Since OpenMP is a shared memory programming model, most variables in OpenMP code ... clauses by appending them to the OpenMP directive. The different types of clauses are Data .... By default, the loop iteration counters in the OpenMP loop constructs are private. default allows ... by the master thread the thread which forked off all the others during the execution of the OpenMP ... variables A method to alter the execution features of OpenMP applications. Used to control loop iterations ... Clauses in work sharing constructs in C programming language C C The application of some OpenMP clauses ... is done by the OpenMP directive pragma omp . The scheduling of tasks is dynamic. Notice how the iteration ... a with an i dependent weight using a for loop which we parallelize using OpenMP directives ... more details
Summary Performance of Smith Waterman algorithm on UniProt DB Fastflow vs Cilk, OpenMP, and TBB the higher the faster . Licensing self cc by sa 3.0 ... more details
unreferenced date February 2008 In parallel computing , loop scheduling is the problem of assigning proper iterations of parallelizable loops among n processors to achieve Load balancing computing load balancing and maintain Locality of reference data locality with minimum dispatch overhead. Typical loop scheduling methods are static even scheduling evenly divide loop iteration space into n chunks and assign each chunk to a processor dynamic scheduling a chunk of loop iteration is dispatched at runtime by an idle processor. When the chunk size is 1 iteration, it is also called self scheduling. guided scheduling similar to dynamic scheduling, but the chunk sizes per dispatch keep shrinking until reaching a preset value. See also OpenMP Automatic parallelization Loop nest optimization Category Parallel computing ... more details
OMP can mean Ontario Model Parliament , a model parliament for high school students in Canada OpenMP , an application programming interface Oregon Mozart Players , a professional chamber orchestra based in Eugene, Oregon Orotidine monophosphate , a nucleotide Osteoblast milk protein , a milk additive Outer membrane protein , a protein found in the outer membrane of gram negative bacteria Outer membrane of porin Online marketing platform Online Marketing Platform , an integrated web based platform that combines the benefits of a business directory, local search engine, search engine optimisation SEO tool, customer relationship management CRM package and content management system CMS OMP Racing , a motorsports equipments manufacturer based in Italy. OMP, Oh My Perry, or Oh My Platypus , Perry being the platypus on the popular Disney show Phineas and Ferb disambig it OMP ja OMP ru sr OMP ... more details
Infobox Software name List of multi threading libraries logo screenshot caption collapsible author developer released latest release version latest release date latest preview version latest preview date frequently updated programming language C operating system platform size language status genre library computing library or Software framework framework license website List of cross platform Simultaneous multithreading multi threading Library computing libraries for the c programming language . Rogue Wave Libraries Boost C Libraries Intel Threading Building Blocks OpenMP OpenThreads POCO Thread part of POCO project http pocoproject.org poco info index.html POSIX Threads http tinythread.sourceforge.net tinythread Zthread Category C Multi threading libraries Category Lists of software Multi threading libraries Category Threads Multi threading libraries ru C ... more details
OpenMP , i.e. using OpenMP to manage multiple Multi core computing cores or microprocessor processors ... nodes in a Computer cluster cluster , but not OpenMP. http www.linux mag.com id 1631 hybrid , i.e. managed using both MPI and OpenMP. When available, the hybrid mode is usually the most efficient ... more details
Context date October 2009 An affinity mask is a mask computing bit mask indicating what Central processing unit processor s a thread computer science thread or process computing process should be run on by the Scheduling computing scheduler of an operating system . Setting the affinity mask for certain processes running under Windows can be useful as there are several system processes especially on domain controllers that are restricted to the first CPU Core. So, excluding the first CPU might lead to better application performance. Windows API Thread affinity in Microsoft Windows can be specified with the SetThreadAffinityMask function. Forcing of each OpenMP thread to distinctive cores in Windows can be accomplished by means of the following C programming language C code source lang c include windows.h include omp.h Set OpenMP thread affinity void set thread affinity pragma omp parallel default shared DWORD PTR mask 1 omp get thread num SetThreadAffinityMask GetCurrentThread , mask source See also Processor affinity External links http msdn.microsoft.com en us library ms686247 VS.85 .aspx MSDN article on SetThreadAffinityMask function http www.linuxcommand.org man pages taskset1.html Taskset, a tool to set the affinity mask on Linux http cpubalancer.brels.net CPU Balancer, a free, open source utility that distributes Windows XP processes uniformly over logical processors using the affinity mask Category Scheduling computing operating system stub ... more details
notability Products date January 2011 Infobox software developer Program Verification Systems Co. Ltd operating system Microsoft Windows Windows genre static code analysis license Proprietary software Proprietary website http www.codeproject.com Catalogs 3179 PVS Studio.aspx product page PVS Studio is a commercial static code analysis tool ref http www.drdobbs.com 218000153 Verifying parallel programs ref for C C C 0x developed by Program Verification Systems . PVS Studio is developed on the basis of the open source VivaCore library ref http www.codeproject.com KB interviews Interview Dmitriy Vyukov.aspx Interview with Dmitriy Vyukov the author of Relacy Race Detector RRD ref which itself is based on the OpenC library. ref http www.dreamincode.net forums topic 44074 the essence of the code analysis library vivacore The essence of the code analysis library VivaCore ref The analyzer s main area of expertise is the migration of 32 bit Windows applications to 64 bit Windows. ref http www.dreamincode.net forums topic 148283 interview with anatoliy kuznetsov the author of bitmagic c library Interview with Anatoliy Kuznetsov, the author of BitMagic C Library ref ref http software.intel.com en us articles 64 bit loki 64 bit Loki ref PVS Studio includes the following diagnostics modules Viva64 &mdash Diagnosis of 64 bit related errors. VivaMP &mdash Diagnosis of OpenMP related errors. ref http www.codeguru.com cpp w p win32 tutorials article.php c15419 32 OpenMP Traps for C Developers ref ref http www.1024cores.net home tools vivamp PVS Studio tool ref A general purpose error diagnosis module. PVS Studio is integrated into Microsoft Visual Studio IDE or can be used independently through a command line interface. See also List of tools for static code analysis References reflist DEFAULTSORT PVS Studio Category Static program analysis tools ... more details
2008 More Fortran 2003 support. Support for OpenMP 3.0. Source Checker for static memory parallel ... Edition. Intel Fortran Compiler 10.1 November 7, 2007 New OpenMP compatibility runtime library. To use the new libraries, you need to use the new option Qopenmp Qopenmp lib compat on Windows, and openmpopenmp lib compat on Linux. This version of the Intel compiler supports more intrinsics from ... more details
Kerrighed is an open source single system image SSI Computer cluster cluster Computer software software project. The project started in October 1998 at the Paris research group Institut National de Recherche en Informatique et en Automatique The French National Institute for Research in Computer Science and Control . Background Kerrighed is implemented as an extension to the Linux operating system. It helps scientific applications such as numerical simulations to use more power. Such applications may be using OpenMP , Message Passing Interface , and or a POSIX Threads Posix multithreaded programming model. ref Morin, Christine. http lists.osdl.org pipermail clusters sig 2005 February 000028.html Kerrighed Linux based SSI for clusters ref Kerrighed provides several features such as a distributed shared memory DSM with a sequential consistency model, processes migration from one cluster node to another, and to a limited extent checkpointing . Kerrighed introduces a container concept this entity is an abstraction of both files and memory. See also OpenSSI OpenMosix Linuxpmi LinuxPMI External links http www.kerrighed.org Kerrighed website http hal.inria.fr inria 00070604 en OpenMosix, OpenSSI and Kerrighed A Comparative Study References references Category Network related software Category Cluster computing Linux stub fr Kerrighed nl Kerrighed pt Kerrighed ... more details
CCRG may refer to Canadian Cancer Research Group in Ottawa, Canada Center for Computational Relativity and Gravitation at the Rochester Institute of Technology The Center for Corporate Reporting and Governance in Mihaylo College Mihaylo College of Business and Economics at the California State University, Fullerton Cherokee Coalition for Responsible Growth in Georgia U.S. state Georgia Charm City Roller Girls , Baltimore s only all girl roller derby league Childhood Cancer Research Group at the University of Oxford Climate Change Research Group at the University of Southern California Cognitive Computing Research Group at the University of Memphis Commonwealth Cultural Resources Group, Inc. Computer Communication Research Group at the University of California, Santa Cruz Concerned Citizens for Responsible Government, a citizen s group that promotes responsible government in Talbot County, Georgia American Cooperative Cataract Research Group Creative Compiler Research Group , a Chinese project to address issues on compiler optimization for modern computer architectures subprojects include CCRG Co array CCRG GCC CCRG OpenMP Criminal Conviction Review Group of the Canadian government Judiciary Canadian Ministry of Justice disambig ... more details
is OpenMP . It usually implemented by lightweight processes, called Thread computer science ... in parallel on multiple CPUs using OpenMP. Within each CPU, SIMD vector instructions usually ... MPI . The Cray parallel directives were a direct predecessor of OpenMP . References references ... more details
. OpenMP and MPI 1 are used in parallel computing environments. Both the Harwell Boeing file format ... Evaluation of Parallel Sparse Matrix Vector Products on SGI Altix 3700 title OpenMP Shared Memory ... more details
otheruses Image MISD.svg right 225px Flynn s Taxonomy In computing , MISD M ultiple I nstruction, S ingle D ata is a type of parallel computing computer architecture architecture where many functional units perform different operations on the same data. Pipeline computing Pipeline architectures belong to this type, though a purist might say that the data is different after processing by each stage in the pipeline. Fault tolerant computers executing the same instructions redundantly in order to detect and mask errors, in a manner known as Replication computer science task replication , may incoherent with the definition of MIMD above... different operations be considered to belong to this type. Not many instances of this architecture exist, as MIMD and SIMD are often more appropriate for common data parallel techniques. Specifically, they allow better scaling and use of computational resources than MISD does. However, one prominent example of MISD in computing are the Space Shuttle flight control computers. Some argue that a systolic array is an example of a MISD structure. ref Quinn, Michael J. Parallel Programming in C with MPI and OpenMP. Boston McGraw Hill, 2004. ref ref Ibaroudene, Djaffer. Parallel Processing, EG6370G Chapter 1, Motivation and History. St Mary s University, San Antonio, TX. Spring 2008. ref Footnotes Reflist 2 CPU technologies Parallel computing Category Flynn s Taxonomy Category Parallel computing Category Classes of computers Misd compu hardware stub ar MISD ca MISD de Flynnsche Klassifikation MISD Multiple Instruction, Single Data es MISD ko MISD it MISD ja MISD pl MISD pt MISD ru MISD ... more details
otheruses Image SISD.svg right 225px Flynn s Taxonomy In computing , SISD S ingle I nstruction, S ingle D ata is a term referring to a computer architecture in which a single processor, a uniprocessor, executes a single instruction stream, to operate on data stored in a single memory. This corresponds to the von Neumann architecture . SISD is one of the four main classifications as defined in Flynn s taxonomy . In this system classifications are based upon the number of concurrent instructions and data streams present in the computer architecture. According to Michael J. Flynn , SISD can have concurrent processing characteristics. Instruction fetching and pipelined execution of instructions are common examples found in most modern SISD computers. ref Quinn, Michael J. Chapter 2 Parallel Architectures. Parallel Programming in C with MPI and OpenMP. Boston McGraw Hill, 2004. ISBN 0 07 282256 2 ref ref Ibaroudene, Djaffer. Parallel Processing, EG6370G Chapter 1, Motivation and History. St. Mary s University, San Antonio, TX. Spring 2008. ref Footnotes Reflist 2 CPU technologies Parallel computing Category Flynn s Taxonomy Category Classes of computers Sisd compu hardware stub ko SISD ar SISD ca SISD de Flynnsche Klassifikation SISD Single Instruction, Single Data es SISD it SISD ja SISD pl SISD pt SISD ru SISD tr Tek komut tek veri ak ... more details
Notability date May 2009 The Distributed Debugging Tool , Allinea DDT, is a commercial debugger produced by Allinea Software of Warwick , United Kingdom , primarily for debugging Parallel computing parallel Message Passing Interface MPI or OpenMP programs, including those running on Computer cluster clusters of Linux machines, but also used by many for scalar code in C programming language C , C and Fortran Fortran 90 . It is used to find bugs on both small and large clusters, from 1 to 1,000s of processors . It is the first debugger to be able to debug a Petascale system having in debugged 220,000 processes, over 2 Petaflops, on a Cray XT5 Cray XT5 at Oak Ridge Oak Ridge National Laboratories . The debugger has logarithmic performance for most collective debugging operations, due to using a tree architecture across the machine network to control the many single process debuggers. This architecture is unique in interactive debugging and enables operations to be measured in milliseconds at full scale. It features a complete memory debugging tool which can be used to detect memory leaks, or reading and writing beyond the bounds of arrays. The debugger is also able to debug GPU software written for CUDA applications. External links http www.allinea.com Allinea Software http www.olcf.ornl.gov 2010 07 12 upgrade adds muscle to debugger Oak Ridge National Laboratories http cacm.acm.org news 96797 ornl allinea prep debugging tool for petascale supercomputers fulltext CACM Category Debuggers programming software stub ... more details
About compiler intrinsic functions X toolkit Intrinsics Refimprove date December 2009 In compiler theory , an intrinsic function is a function available for use in a given computer language language whose implementation is handled specially by the compiler. Typically, it substitutes a sequence of automatically generated instructions for the original function call, similar to an inline function . Unlike an inline function though, the compiler has an intimate knowledge of the intrinsic function and can therefore better integrate it and optimize it for the situation. This is also called builtin function in many languages. Compilers that implement intrinsic functions generally enable them only when the user has requested compiler optimizations optimization , falling back to a default implementation provided by the language runtime environment otherwise. Intrinsic functions are often used to explicitly implement Vectorization parallel computing vectorization and parallel processing parallelization in languages which do not address such constructs. Altivec and OpenMP are examples of API s which use intrinsic functions to declare, respectively, vectorizable and multiprocessor aware operations during compilation. The compiler parses the intrinsic functions and converts them into vector math or multiprocessing object code appropriate for the target platform. Microsoft and Intel s C C compilers as well as GNU Compiler Collection GCC implement intrinsics that map directly to the x86 SIMD instructions MMX instruction set MMX , Streaming SIMD Extensions SSE , SSE2 , SSE3 , SSSE3 , SSE4 . In the latest version of the Microsoft compiler VC2005 as well as VC2008 inline assembly is not available when compiling for 64 bit Windows. ref cite web url http msdn.microsoft.com en us library wbk4z78b.aspx?ppud 4 title Intrinsics and Inline Assembly publisher Microsoft author Visual Studio 2010 SDK accessdate 2010 04 16 ref To compensate for the lack of inline assembly, new intrinsics have b ... more details
TotalView is a proprietary debugger for C programming language C C and Fortran code that runs on Unix like Operating System Operating Systems such as Linux and Mac OS X systems, on several platforms. It allows process control down to the single thread computer science thread , the ability to look at data for a single thread or all threads at the same time, and the ability to synchronize threads through breakpoint s. TotalView integrates memory leak detection and other heap based memory allocation heap memory debugging features. Data analysis features help find anomalies and problems in the target program s data, and the combination of visualization and evaluation points lets the user watch data change as the program executes. TotalView includes the ability to test fixes while debugging. It supports parallel programming including Message Passing Interface MPI , Unified Parallel C UPC and OpenMP . It can be extended to support debugging CUDA . It also has an optional add on called ReplayEngine that can be used to perform reverse debugging stepping backwards to look at older values of variables. In 2007 Etnus, Inc. changed its name to TotalView Technologies, Inc. In 2010 TotalView Technologies was acquired by Rogue Wave company Rogue Wave Software . External links http www.hpcwire.com hpc 347014.html TotalView runs on 98 of the top 100 supercomputers see www.top500.org 2005 in the world http www.roguewave.com http www.roguewave.com Category Debuggers Category Mac OS X software Category Unix programming tools Category Linux programming tools ru Etnus TotalView fr TotalView ... more details
A hypertree network is a network topology that shares some traits with the binary tree network . ref name quinn Parallel Programming in C with MPI and OpenMP , by Michael J. Quinn, http books.google.com books?id tDxNyGSXg5IC&pg PA31&dq 22hypertree network 22&ei VIjuSKKgOKGutgPLgI3RBg&sig ACfU3U30rkUn h6 ISrG1ItRqgQgONDXCg pp.31, 32 ref It is a variation of the fat tree architecture. ref name eval A hypertree of degree k depth d may be visualized as a 3 dimensional object whose front view is the top down complete k ary tree of depth d and the side view is the bottom up complete binary tree of depth d . ref name quinn Hypertrees were proposed in 1981 by James R. Goodman and Carlo Sequin . ref Goodman, J.R.,Sequin, C.H. Hypertree A Multiprocessor Interconnection Topology , IEEE Transactions on Computers , vol. 20, no. 12, 1981, pp. 923 933, doi 0.1109 TC.1981.1675731 ref Hypertrees are a choice for parallelism computing parallel computer architecture , used, e.g., in the connection machine CM 5. ref name eval Mengjou Lin, Rose Tsang, and David H.C. Du Alan E. Klietz and Stephen Saroff, Performance Evaluation of the CM 5 Interconnection Network , Compcon ACM IEEE conference on Supercomputing , Spring 93, Digest of Papers, 1993, pp. 189 198 ref ref C. E. Leiserson. Z. S. Abuhamdeh. D. C. Douglas. C. R. Feynman. M. N. Ganmukhi. J. V. Hill. W. D. Hillis. B. C. Kuszmaul. M. A. St. Pierre. D. S. Wells. M. C. Wong. S Yang. R. Zak. The network architecture of the connection machine CM 5 . In Proceeding of Parallel Algorithms and Architectures Symposium June 29 July 1 1992. ref References reflist Category network topology ... more details
Infobox Software name Intel Parallel Inspector logo screenshot caption developer http software.intel.com en us intel sdp home Intel Developer Products operating system Windows development environment Microsoft Visual Studio genre Profiler computer science Profiler Memory debugger license single user website http software.intel.com en us intel parallel inspector Parallel Inspector product page Intel Parallel Inspector adds memory and thread checking into Microsoft Visual Studio . Parallel Inspector helps increase the reliability, security, and accuracy of C programming language C C applications. Reliability Find deadlocks and memory errors that cause lockups & crashes Security Find memory and threading vulnerabilities used by hackers Accuracy Identify memory corruption and race conditions to eliminate erroneous results Memory checking includes memory leaks , dangling pointers , uninitialized variable s, use of invalid memory references, mismatched memory, allocation and deallocation, stack memory checks, and stack trace with controllable stack trace depth Thread checking includes race condition s, deadlock s, depth configurable call stack analysis, diagnostic guidance, built in knowledge of Intel Threading Building Blocks , OpenMP , and Windows threads. It is available as part of Intel Parallel Studio or as a standalone product. External links http www.intel.com go parallel Intel Parallel Studio Home http software.intel.com en us intel parallel inspector Intel Parallel Inspector Product Page See also Memory debugger Memory leak Windows software stub Category Debuggers Category Memory management software ru Intel Parallel Inspector ... more details
This article lists all concurrent and parallel programming languages. A concurrent language is defined as one which uses the concept of simultaneously executing processes or threads of execution as a means of structuring a program. A parallel language is able to express programs that are executable on more than one processor. Both types are listed as concurrency is a useful tool in expressing parallelism, but it is not necessary. In both cases, the features must be part of the language syntax and not an extension such as a library. The following categories aim to capture the main, defining feature of the languages contained, but they are not necessarily orthogonal. CSP based Ateji PX An extension of Java with parallel primitives inspired from pi calculus Concurrent Pascal Joyce programming language Joyce Occam programming language Occam Occam SuperPascal XC Actor Model Erlang programming language Erlang Multi threaded Cilk Go programming language Go GPU languages CUDA OpenCL Partitioned global address space PGAS main Partitioned global address space Chapel programming language Chapel Co array Fortran Fortress programming language Fortress High Performance Fortran Titanium Unified Parallel C X10 programming language X10 Event driven & hardware description main Event driven programming main Hardware Description Language Verilog VHDL SystemC ParC Parallel C through language extensions Unsorted Ada programming language Ada C Charm Ease programming language Ease Haskell programming language Haskell AccelerEyes Jacket Linda coordination language Linda coordination language Message Passing Interface NESL OpenMP Oz programming language Oz Scala programming language Scala ZPL programming language ZPL Category Parallel computing ... more details
compilers docs clin main cls copts ccpp options option std.htm . VS2008 IDE integration on Windows. OpenMP ..., 2007 New OpenMP compatibility runtime library if you use the new OpenMP RTL, you can mix and match ... Qopenmp Qopenmp lib compat on Windows, and openmpopenmp lib compat on Linux. This version of the Intel ... more details
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