Site Tools


master-openmp

Differences

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

Link to this comparison view

Both sides previous revisionPrevious revision
Next revision
Previous revision
master-openmp [June 11, 2026 at 11:08] – Ivan Janevskimaster-openmp [Unknown date] (current) – removed - external edit (Unknown date) 127.0.0.1
Line 1: Line 1:
-# Master (OpenMP) 
-**Master** is an OpenMP directive that restricts execution of a block to thread 0.  
- 
-Unlike [[single-openmp|single]], there is no implicit barrier. Other threads skip the block entirely and continue immediately, making it suitable for non-critical side effects like printing progress or updating a log counter where stalling the whole team would be wasteful. 
- 
-```c 
-#pragma omp parallel 
-{ 
-    do_work(); 
- 
-    #pragma omp master 
-    printf("iteration %d done\n", iter);  // thread 0 only; no barrier 
- 
-    do_more_work();  // all threads, including thread 0, continue here 
-} 
-``` 
- 
-Use `single` when the rest of the team must wait for the result; use `master` when the block is incidental and the team should not be held up. 
  
master-openmp.1781176124.md.gz · Last modified: by Ivan Janevski