Open-Source OpenMP* Runtime Library

Thank you for visiting this site. The development of the open-source OpenMP* runtime now happens in the context of LLVM*. Please visit http://openmp.llvm.org for source access, and use the openmp-dev@lists.llvm.org mailing list for discussions about the OpenMP* implementation.

Note that the LLVM* OpenMP* runtime is binary compatible with code compiled by the Intel(R) OpenMP* compilers, and we intend to maintain that property in the future.

Latest Posts

News
Forums
March 16, 2015: New code release

We are excited to announce the next release of the Intel® OpenMP* Runtime Library at openmprtl.org. This release aligns with Intel® Parallel Studio XE 2015 Composer Edition Update 3.

New Features

  • OpenMP* 4.1: Support for a new kind of task needed for asynchronous offload
  • Improved Intel® Trace Analyzer and Collector and Intel® VTune™ Performance Tools support

Bug Fixes

  • Missed symbol omp_in_final added into header/module files
  • Fixes for hierarchical barrier for the case where affinity is off or disabled, and for when the computer is oversubscribed

Contributions

  • aarch64 port from Chris Bergstrom (PathScale)
  • ppc64le port from Carlo Bertolli (IBM)
  • KMP_MB() fix for ARM from Chris Bergstrom (PathScale)
  • OpenMP 2.5 cleanup from Jonas Hahnfeld (RWTH Aachen University)

 

December 17, 2014: New code release

We are excited to announce the next release of the Intel® OpenMP* Runtime Library at openmprtl.org. This release aligns with Intel® Parallel Studio XE 2015 Composer Edition Update 2.

New Features

  • OpenMP* 4.0: omp_is_initial_device() implemented
  • Code to support lock hints using Intel® Transactional Synchronization Extensions (Intel® TSX) (as in http://rd.springer.com/chapter/10.1007%2F978-3-319-11454-5_13 ). This code is not enabled in the default library build (and uses the “kmp_” prefix rather than “omp_” since it is not a standard OpenMP* feature)

Bug Fixes

  • get_omp_proc_bind() fixed on OS X*.
  • Crash caused by multiple load/unload fixed on Microsoft Windows* IA-32 architecture.

 

October 20, 2014: LLVM in Clang Developers Meeting

In case you missed it, you may like to know that there will be a talk on "OpenMP* Support in Clang/LLVM: Status Update and Future Directions" at the LLVM developers' meeting http://www.llvm.org/devmtg/2014-10/ in a couple of weeks' time.

25 February 2014, 1:50 am: Compiler flags

Dear all,

I am looking for flag option that used to generate intermediate representation of OpenMP* on icc, such as explain in (1.7.1 Work Sharing Example).

Also, is it possible to extend  icc compiler by adding new pragma (directive)?

Thanks in adavnce

Regards

22 February 2014, 10:26 am: Open cores using openmp

Is there any way I can summon nCores with OpenMP?

14 February 2014, 1:14 am: __kmpc_push_num_threads bug?

I use __kmpc_push_num_threads for support num_threads clause. But it is segmentation fault when call __kmp_push_num_threads.

I debug with gdb and found that __kmp_threads is null. This is __kmpc_push_num_threads bug? or I miss anything?

kmp_runtime.c:7884
7884	    kmp_info_t *thr = __kmp_threads[gtid];
(gdb) p __kmp_threads
$1 = (kmp_info_t **) 0x0

Thank you