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This page contains information on GCC's implementation of the [[http://openmp.org/wp/|OpenMP]] standard and related functionality like the auto parallelizer ({{{-ftree-parallelize-loops}}}). This page contains information on GCC's implementation of the [[http://openmp.org/wp/|OpenMP]] specification and related functionality like the auto parallelizer ({{{-ftree-parallelize-loops}}}).
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As of GCC 4.2, the compiler implements version 2.5 of the OpenMP standard and as of 4.4 it implements version 3.0 of the OpenMP standard. The OpenMP 3.1 is supported since GCC 4.7. As of GCC 4.2, the compiler implements version 2.5 of the OpenMP specification, as of 4.4 it implements version 3.0 and since GCC 4.7 it supports the OpenMP 3.1 specification. GCC 4.9 supports OpenMP 4.0 for C/C++, GCC 4.9.1 also for Fortran. GCC 5 adds support for [[Offloading]].
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 * Documentation on [[http://gcc.gnu.org/onlinedocs/libgomp/|libgomp]] (OpenMP runtime for GCC).  * Documentation on [[http://gcc.gnu.org/onlinedocs/libgomp/|libgomp]] (GNU Offloading and Multi Processing Runtime Library).
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 * [[http://www.openmp.org/mp-documents/OpenMP_4.0_RC2.pdf|OpenMP v4.0rc2 specification]] (March 2013) ([[http://openmp.org/forum/viewforum.php?f=12|OpenMP 4.0 API forum]], [[http://openmp.org/wp/2013/03/openmp-40-rc2/|rc2 changes]])  * [[http://www.openmp.org/mp-documents/OpenMP4.0.0.pdf|OpenMP v4.0 specification]] (July2013) (Official [[http://openmp.org/mp-documents/OpenMP4.0.0.Examples.pdf|OpenMP 4.0 Examples]], [[http://openmp.org/forum/viewforum.php?f=12|OpenMP 4.0 API forum]])
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 * OpenMP 4.0 -- when available. Cf. slides at the [[http://www.ccs.tsukuba.ac.jp/workshop/IWOMP2010/|IWOMP, the International Workshop for OpenMP]] ([[http://www.ccs.tsukuba.ac.jp/workshop/IWOMP2010/program.html|slides]] and [[http://www.ccs.tsukuba.ac.jp/workshop/IWOMP2010/tutorial.html|tutorials]]) in June 2010 and the [[http://www.springerlink.com/content/978-3-642-13216-2|OWOMP 2010 proceedings]]. There is also a [[http://www-949.ibm.com/software/rational/cafe/blogs/ccpp-parallel-multicore/2010/06/21/the-view-from-iwomp-2010-trip-report|blog entry]]. See also IWOMP 2012's [[http://www.ncsa.illinois.edu/Conferences/IWOMP11/program/program.html|talks]] and the [[http://www.ncsa.illinois.edu/Conferences/IWOMP11/program/presentations/supinski.pdf|committee report]]. SC2011 (November 2011): [[http://openmp.org/wp/presos/SC11_OpenMP_BoF.pdf|OpenMP Lang Committee Report]], [[http://openmp.org/wp/presos/SCBOF11.pdf|CEO report]]
  And the 2012 slides: [[http://iwomp-2012.caspur.it/program/workshop-program|IWOMP program]], [[http://iwomp-2012.caspur.it/sites/iwomp-2012.caspur.it/files/IWOMP12_State_of_LC.pdf|Language Committee report]]
 * OpenMP 4.0 (specifications released on July 2013). Cf. slides at the [[http://www.ccs.tsukuba.ac.jp/workshop/IWOMP2010/|IWOMP, the International Workshop for OpenMP]] ([[http://www.ccs.tsukuba.ac.jp/workshop/IWOMP2010/program.html|slides]] and [[http://www.ccs.tsukuba.ac.jp/workshop/IWOMP2010/tutorial.html|tutorials]]) in June 2010 and the [[http://www.springerlink.com/content/978-3-642-13216-2|OWOMP 2010 proceedings]]. There is also a [[http://www-949.ibm.com/software/rational/cafe/blogs/ccpp-parallel-multicore/2010/06/21/the-view-from-iwomp-2010-trip-report|blog entry]]. See also IWOMP 2012's [[http://www.ncsa.illinois.edu/Conferences/IWOMP11/program/program.html|talks]] and the [[http://www.ncsa.illinois.edu/Conferences/IWOMP11/program/presentations/supinski.pdf|committee report]]. SC2011 (November 2011): [[http://openmp.org/wp/presos/SC11_OpenMP_BoF.pdf|OpenMP Lang Committee Report]], [[http://openmp.org/wp/presos/SCBOF11.pdf|CEO report]]
  . And the 2012 slides: [[http://iwomp-2012.caspur.it/program/workshop-program|IWOMP program]], [[http://iwomp-2012.caspur.it/sites/iwomp-2012.caspur.it/files/IWOMP12_State_of_LC.pdf|Language Committee report]]
  . And the OpenMP 4.0 release candidate documents: [[http://www.openmp.org/mp-documents/OpenMP_4.0_RC2.pdf|OpenMP v4.0rc2 specification]] (March 2013) ([[http://openmp.org/forum/viewforum.php?f=12|OpenMP 4.0 API forum]], [[http://openmp.org/wp/2013/03/openmp-40-rc2/|rc2 changes]])
  . And a comment prior to the final release: [[https://www.ibm.com/developerworks/community/blogs/5894415f-be62-4bc0-81c5-3956e82276f3/entry/openmp_4_0_about_to_be_released_and_iwomp_2013?lang=en|OpenMP 4.0 about to be released and IWOMP 2013, by Michael Wong]] (May 2013)

OpenMP

This page contains information on GCC's implementation of the OpenMP specification and related functionality like the auto parallelizer (-ftree-parallelize-loops).

As of GCC 4.2, the compiler implements version 2.5 of the OpenMP specification, as of 4.4 it implements version 3.0 and since GCC 4.7 it supports the OpenMP 3.1 specification. GCC 4.9 supports OpenMP 4.0 for C/C++, GCC 4.9.1 also for Fortran. GCC 5 adds support for Offloading.

OpenMP Documentation

Automatic Parallelization

(-ftree-parallelize-loops)

  • Streamization

Test Suites and Benchmarks

TODO List

Feel free to add new items to this list as you run into issues or features that would be interesting to add. Send mail to the list and/or the GCC OpenMP maintainers if any item in this list sounds interesting but is hard to understand.

None: openmp (last edited 2015-01-29 08:24:51 by tschwinge)