Site Tools


barrier-openmp

Differences

This shows you the differences between two versions of the page.

Link to this comparison view

Next revision
Previous revision
barrier-openmp [June 11, 2026 at 07:42] – created - external edit 127.0.0.1barrier-openmp [Unknown date] (current) – removed - external edit (Unknown date) 127.0.0.1
Line 1: Line 1:
-# Barrier (OpenMP) 
-**Barrier** is a synchronisation point where all threads in a team wait until every member has arrived. OpenMP inserts an implicit barrier at the end of every `parallel`, `for`, and `sections` region. All threads wait there until every member of the team has arrived. An explicit `#pragma omp barrier` adds a synchronisation point mid-region, which is needed when one group of threads produces data that another group will consume in the same parallel block. 
- 
-```c 
-#pragma omp parallel 
-{ 
-    fill(omp_get_thread_num());   // each thread fills its slice 
-    #pragma omp barrier           // wait for all threads to finish filling 
-    read(omp_get_thread_num());   // now safe to read any slice 
-} 
-``` 
  
barrier-openmp.1781163767.md.gz · Last modified: by 127.0.0.1