3-openmp/{parallel_for/parallel_for.c → several_for/several_for.c} RENAMED
@@ -1,28 +1,33 @@
1
  #include <omp.h>
2
  #include <stdio.h>
3
  #include <stdlib.h>
4
 
 
5
  int main(int argc, char* argv[])
6
  {
7
  int thread_count = omp_get_max_threads();
8
  if ( argc >= 2 )
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  thread_count = atoi( argv[1] );
10
 
11
  int iterations = thread_count;
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  if ( argc >= 3 )
13
  iterations = atoi( argv[2] );
14
 
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- #pragma omp parallel for num_threads(thread_count) \
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- default(none) shared(iterations)
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- for ( int iteration = 0; iteration < iterations; ++iteration )
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  {
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- #pragma omp critical (print)
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- printf("%d/%d: iteration %d/%d\n"
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- , omp_get_thread_num()
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- , omp_get_num_threads()
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- , iteration
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- , iterations );
 
 
 
 
 
 
25
  }
26
 
27
  return 0;
28
  }
1
  #include <omp.h>
2
  #include <stdio.h>
3
  #include <stdlib.h>
4
 
5
+
6
  int main(int argc, char* argv[])
7
  {
8
  int thread_count = omp_get_max_threads();
9
  if ( argc >= 2 )
10
  thread_count = atoi( argv[1] );
11
 
12
  int iterations = thread_count;
13
  if ( argc >= 3 )
14
  iterations = atoi( argv[2] );
15
 
16
+ #pragma omp parallel num_threads(thread_count) default(none) shared(iterations, stderr)
 
 
17
  {
18
+ #pragma omp for
19
+ for ( int iteration = 0; iteration < iterations; ++iteration )
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+ fprintf(stderr, "stage 1: %d/%d: iteration %d/%d\n", omp_get_thread_num(), omp_get_num_threads(), iteration, iterations );
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+
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+ //#pragma omp barrier
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+ #pragma omp for
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+ for ( int iteration = 0; iteration < iterations; ++iteration )
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+ fprintf(stderr, "stage 2: %d/%d: iteration %d/%d\n", omp_get_thread_num(), omp_get_num_threads(), iteration, iterations );
26
+
27
+ #pragma omp for
28
+ for ( int iteration = 0; iteration < iterations; ++iteration )
29
+ fprintf(stderr, "stage 3: %d/%d: iteration %d/%d\n", omp_get_thread_num(), omp_get_num_threads(), iteration, iterations );
30
  }
31
 
32
  return 0;
33
  }