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roberto.alfieri:pub:openmp [14/10/2020 18:36] roberto.alfieri |
roberto.alfieri:pub:openmp [18/03/2022 16:11] (versione attuale) roberto.alfieri [What is openMP] |
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| ====== OpenMP ====== | ====== OpenMP ====== | ||
| + | ====Tutorials, external links ==== | ||
| + | |||
| + | [[https://hpc-tutorials.llnl.gov/openmp/| LLNL]] | ||
| + | |||
| + | |||
| + | **[[http://didattica-linux.unipr.it/~alfieri/matdid/HPC/openmp/base/ | Exercises repository ]]** | ||
| + | |||
| + | |||
| + | ==== What is openMP ==== | ||
| [[http://openmp.org/ | OpenMP]] adds constructs for shared-memory threading to C, C++ and Fortran | [[http://openmp.org/ | OpenMP]] adds constructs for shared-memory threading to C, C++ and Fortran | ||
| - | [[https://computing.llnl.gov/tutorials/openMP/#ProgrammingModel | Memory Model:]] | ||
| {{:roberto.alfieri:pub:shared_mem.png?200|}} | {{:roberto.alfieri:pub:shared_mem.png?200|}} | ||
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| Version 4.0 (July 2013), 4.5 (Nov 2015 ) and 5.0 (Nov 2018) add support for accelerators (target directives), vectorization (SIMD directives), thread affinity and cancellation. | Version 4.0 (July 2013), 4.5 (Nov 2015 ) and 5.0 (Nov 2018) add support for accelerators (target directives), vectorization (SIMD directives), thread affinity and cancellation. | ||
| - | [[https://developers.redhat.com/blog/2019/03/19/whats-new-in-openmp-5-0/ | What's new in OpenMP 5.0 ]] | ||
| - | ====Tutorials, external links ==== | ||
| - | |||
| - | [[https://computing.llnl.gov/tutorials/openMP/ | LLNL]] | ||
| - | - | ||
| - | [[http://bisqwit.iki.fi/story/howto/openmp/ | Guide into OpenMP: Easy multithreading programming for C++]] | ||
| - | |||
| - | **[[http://didattica-linux.unipr.it/~alfieri/matdid/HPC/openmp/base/ | Exercises repository ]]** | ||
| === openMP support in the C/C++ Compilers === | === openMP support in the C/C++ Compilers === | ||
| - | http://www.openmp.org/resources/openmp-compilers/ | + | https://www.openmp.org/resources/openmp-compilers-tools/ |
| GCC: From GCC 6.1, OpenMP 4.5 is fully supported for C and C++ | GCC: From GCC 6.1, OpenMP 4.5 is fully supported for C and C++ | ||
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| </note> | </note> | ||
| - | INTEL: OpenMP 4.5 C/C++/Fortran supported in version 17.0 compilers | ||
| == How to compile with openMP library == | == How to compile with openMP library == | ||
| - | Compile with -fopenmp (gcc compiler) or -qopenmp (intel compiler) on Linux | + | Compile with -fopenmp on Linux |
| ===== Execution model ===== | ===== Execution model ===== | ||
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| - | Examples: for2.c | + | Examples: for-schedule.c |
roberto.alfieri/pub/openmp.1602693411.txt.gz · Ultima modifica: 14/10/2020 18:36 da roberto.alfieri
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