Development/Parallel Programming - Revision history

K Siegmund at 08:12, 20 June 2023

2023-06-20T08:12:56Z

← Older revision		Revision as of 10:12, 20 June 2023
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	* To display mini-help of a compiler command, execute it without any parameters.		* To display mini-help of a compiler command, execute it without any parameters.


	=== Further information ===
	==== ~~Intel~~ MPI ~~without~~ ~~multithreading~~ on ~~the bwUniCluster =~~===		=== Sample MPI programm in "C" ===
	* [[Batch_Jobs_-_bwUniCluster_Features#Intel_MPI_without_Multithreading\|Additional Infos about Intel MPI without Multithreading]]
	==== Sample MPI programm in "C" ====
	The following example code includes a sample MPI program written in C.		The following example code includes a sample MPI program written in C.
	<source lang="c">		<source lang="c">

S Richling at 21:12, 14 March 2023

2023-03-14T21:12:19Z

← Older revision		Revision as of 23:12, 14 March 2023
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	== General Information ==		== General Information ==
	OpenMP is a mature specification [http://www.openmp.org/specifications/] to allow easy, portable, and most importantly incremental node-level parallelisation of code.		OpenMP is a mature specification [http://www.openmp.org/specifications/] to allow easy, portable, and most importantly incremental node-level parallelisation of code.
	Being a thread-based approach, OpenMP is aimed at more fine-grained parallelism than ~~[[BwHPC_Best_Practices_Repository#~~MPI~~\|MPI]]~~.		Being a thread-based approach, OpenMP is aimed at more fine-grained parallelism than MPI.
	Although there have been extensions to extend OpenMP for inter-node parallelisation, it is a node-level approach aimed to make best usage of a node's cores<!-- -- the section [[#Hybrid Parallelisation\|Hybrid Parallelisation]] will explain how to parallelise utilizing MPI plus a thread-based parallelization paradigm like OpenMP-->.		Although there have been extensions to extend OpenMP for inter-node parallelisation, it is a node-level approach aimed to make best usage of a node's cores<!-- -- the section [[#Hybrid Parallelisation\|Hybrid Parallelisation]] will explain how to parallelise utilizing MPI plus a thread-based parallelization paradigm like OpenMP-->.
	<br>		<br>

S Richling at 22:22, 8 December 2022

2022-12-08T22:22:32Z

← Older revision		Revision as of 00:22, 9 December 2022
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	== Usage ==		== Usage ==
	OpenMP is supported by various compilers, here the usage for two main compilers [[~~BwHPC_BPG_Compiler#~~GCC\|GCC]] and [[~~BwHPC_BPG_Compiler#Intel Suite~~\|Intel Suite]] are introduced.		OpenMP is supported by various compilers, here the usage for two main compilers [[Development/GCC\|GCC]] and [[Development/Intel_Compiler\|Intel Suite]] are introduced.
	For both compilers, You first need to turn on OpenMP support by specifying a parameter on the compiler's command-line.		For both compilers, You first need to turn on OpenMP support by specifying a parameter on the compiler's command-line.
	In case You make function calls to OpenMP's API, You also need to include the header-file <tt>omp.h</tt>.		In case You make function calls to OpenMP's API, You also need to include the header-file <tt>omp.h</tt>.
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	\| mpifc \|\| gfortran \|\| Fortran77/Fortran 95 \|\| 32/64 bit		\| mpifc \|\| gfortran \|\| Fortran77/Fortran 95 \|\| 32/64 bit
	\|-		\|-
	\| colspan=4 style="background-color:#DCDCDC;" \| [[GCC\|GNU Compiler]] Versions 3 and higher		\| colspan=4 style="background-color:#DCDCDC;" \| [[Development/GCC\|GNU Compiler]] Versions 3 and higher
	\|-		\|-
	\| mpigcc \|\| gcc \|\| C \|\| 32/64 bit		\| mpigcc \|\| gcc \|\| C \|\| 32/64 bit

S Richling at 22:16, 8 December 2022

2022-12-08T22:16:58Z

← Older revision		Revision as of 00:16, 9 December 2022
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	\| mpif90 \|\| gfortran \|\| Fortran 95 \|\| 32/64 bit		\| mpif90 \|\| gfortran \|\| Fortran 95 \|\| 32/64 bit
	\|-		\|-
	\| colspan=4 style="background-color:#DCDCDC;" \| [[Intel_Compiler\|'''Intel Fortran, C++ Compilers''']] Versions 13.1 through 14.0 and Higher		\| colspan=4 style="background-color:#DCDCDC;" \| [[Development/Intel_Compiler\|'''Intel Fortran, C++ Compilers''']] Versions 13.1 through 14.0 and Higher
	\|-		\|-
	\| mpiicc \|\| icc \|\| C \|\| 32/64 bit		\| mpiicc \|\| icc \|\| C \|\| 32/64 bit

S Richling: /* MPI */

2022-12-08T21:59:58Z

MPI

← Older revision		Revision as of 23:59, 8 December 2022
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	In this section, You will find information regarding the supported installations of the Message-Passing Interface libraries and their usage.<br>		In this section, You will find information regarding the supported installations of the Message-Passing Interface libraries and their usage.<br>
	Due to the Fortran interface ABI, all MPI-libraries are normally bound to a specific compiler-vendor and even the specific compiler version.		Due to the Fortran interface ABI, all MPI-libraries are normally bound to a specific compiler-vendor and even the specific compiler version.
	Therefore, ~~as listed in [[BwHPC_BPG_Compiler]]~~ two compilers are supported on bwUniCluster: [[GCC\|GCC]] and [[Intel_Compiler\|Intel Compiler Suite]].		Therefore, two compilers are supported on bwUniCluster: [[Development/GCC\|GCC]] and [[Development/Intel_Compiler\|Intel Compiler Suite]].
	As both compilers are continuously improving, the communication libraries will be adopted and recompiled in lock-step.		As both compilers are continuously improving, the communication libraries will be adopted and recompiled in lock-step.
	<br>		<br>

S Richling: S Richling moved page BwHPC BPG for Parallel Programming to Development/Parallel Programming: Umzung in Developmentbereich

2022-12-08T21:40:54Z

S Richling moved page BwHPC BPG for Parallel Programming to Development/Parallel Programming: Umzung in Developmentbereich

← Older revision	Revision as of 23:40, 8 December 2022
(No difference)

S Richling: /* Introduction */

2022-12-08T21:35:22Z

Introduction

← Older revision		Revision as of 23:35, 8 December 2022
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	<br>		<br>
	More informations about Compilers installed at our clusters is available here:		More informations about Compilers installed at our clusters is available here:
	* [[Intel_Compiler\|Intel Compiler Suite]]		* [[Development/Intel_Compiler\|Intel Compiler Suite]]
	* [[GCC\|GNU Compiler (GCC)]]		* [[Development/GCC\|GNU Compiler (GCC)]]
	* [[Development/General_compiler_usage\|General Compiler Usage (incl. PGI Compiler)]]		* [[Development/General_compiler_usage\|General Compiler Usage (incl. PGI Compiler)]]

S Richling: /* Introduction */

2022-12-08T21:27:26Z

Introduction

← Older revision		Revision as of 23:27, 8 December 2022
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	* [[Intel_Compiler\|Intel Compiler Suite]]		* [[Intel_Compiler\|Intel Compiler Suite]]
	* [[GCC\|GNU Compiler (GCC)]]		* [[GCC\|GNU Compiler (GCC)]]
	* [[General_compiler_usage\|General Compiler Usage (incl. PGI Compiler)]]		* [[Development/General_compiler_usage\|General Compiler Usage (incl. PGI Compiler)]]

	= OpenMP =		= OpenMP =

M Janczyk: /* Introduction */

2022-02-17T10:52:00Z

Introduction

← Older revision		Revision as of 12:52, 17 February 2022
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	* [[GCC\|GNU Compiler (GCC)]]		* [[GCC\|GNU Compiler (GCC)]]
	* [[General_compiler_usage\|General Compiler Usage (incl. PGI Compiler)]]		* [[General_compiler_usage\|General Compiler Usage (incl. PGI Compiler)]]

	´

	= OpenMP =		= OpenMP =

M Janczyk: /* Versions and Availability */

2022-02-17T10:51:44Z

Versions and Availability

← Older revision		Revision as of 12:51, 17 February 2022
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	* [[General_compiler_usage\|General Compiler Usage (incl. PGI Compiler)]]		* [[General_compiler_usage\|General Compiler Usage (incl. PGI Compiler)]]

			´
	= Versions and Availability =
	=== impi (Intel) ===
	A list of versions currently available compilers on the bwHPC-C5-Clusters can be obtained from the
	<br>
	<big>
	<br>
	[https://cis-hpc.uni-konstanz.de/prod.cis/ Cluster Information System CIS]
	<br></big>
	{{#widget:Iframe
	\|url=https://cis-hpc.uni-konstanz.de/prod.cis/bwUniCluster/mpi/impi
	\|width=99%
	\|height=1200
	}}

	=== openmpi ===
	A list of versions currently available compilers on the bwHPC-C5-Clusters can be obtained from the
	<br>
	<big>
	<br>
	[https://cis-hpc.uni-konstanz.de/prod.cis/ Cluster Information System CIS]
	<br></big>
	{{#widget:Iframe
	\|url=https://cis-hpc.uni-konstanz.de/prod.cis/bwUniCluster/mpi/openmpi
	\|width=99%
	\|height=2100
	}}
	<br>

	= OpenMP =		= OpenMP =