Differenze

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--- roberto.alfieri:pub:openmp [14/10/2020 18:22] – roberto.alfieri
+++ roberto.alfieri:pub:openmp [18/03/2022 16:11] (versione attuale) – [What is openMP] roberto.alfieri
@@ Linea 1: / Linea 1: @@
 ====== 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
-[[https://computing.llnl.gov/tutorials/openMP/#ProgrammingModel | Memory Model:]]
 {{:roberto.alfieri:pub:shared_mem.png?200|}}
@@ Linea 21: / Linea 29: @@
 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 ===
-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++
@@ Linea 48: / Linea 47: @@
 </note>
-INTEL:  OpenMP 4.5 C/C++/Fortran supported in version 17.0 compilers
 == How to compile with openMP library ==
-Compile with -fopenmp (gcc compiler)  or -qopenmp (intel compiler) on Linux
+Compile with -fopenmp  on Linux
 ===== Execution model =====
@@ Linea 209: / Linea 207: @@
 A parallel region is a block of code that will be executed by multiple threads. This is the fundamental OpenMP parallel construct.
-Examples: ex1.c ex2.c [[http://www.fis.unipr.it/home/roberto.alfieri/didattica/matdid/prog/omp/esempi/parallel2.c | parallel2.c ]]
+Examples: ex1.c ex2.c parallel-single.c
@@ Linea 231: / Linea 229: @@
   Or use #pragma omp parallel for
-[[http://www.fis.unipr.it/home/roberto.alfieri/didattica/matdid/prog/omp/esempi/ | Examples]]: for.c for2.c
+ Examples: for.c for-schelule.c
@@ Linea 243: / Linea 241: @@
 All other threads on the team skip this section of code.
-[[http://www.fis.unipr.it/home/roberto.alfieri/didattica/matdid/prog/omp/esempi/ | Examples]]: single.c
+Examples: parallel-single.c
 ==== Sections Directive ====
@@ Linea 263: / Linea 261: @@
 There is an implied barrier at the end of a SECTIONS directive
-[[http://www.fis.unipr.it/home/roberto.alfieri/didattica/matdid/prog/omp/esempi/ | Examples]]: sections.c sections2.c
+ Examples: sections.c
 ==== Critical  Directive ====
@@ Linea 288: / Linea 286: @@
 }
 </code>
+Examples: ex2.c
@@ Linea 312: / Linea 310: @@
-[[http://www.fis.unipr.it/home/roberto.alfieri/didattica/matdid/prog/omp/esempi/ | Examples]]: reduction.c
+ Examples: reduction.c
 == Combining FOR and reduce ==
@@ Linea 339: / Linea 337: @@
-[[http://www.fis.unipr.it/home/roberto.alfieri/didattica/matdid/prog/omp/esempi/ | Examples]]: for2.c
+ Examples: for-schedule.c