a strange problem when openmp with glib ghash
- From: Qingpeng Niu <niuqingpeng gmail com>
- To: gtk-list gnome org
- Subject: a strange problem when openmp with glib ghash
- Date: Tue, 21 Sep 2010 12:31:22 -0400
Hi, 
I do a parallel open mp for which used shared data of g_hash_table.  Program do fine with the first parallel for loop but the third parallel for loop program will stop there and never be entered.
g_thread_init(NULL);
..............
#pragma omp parallel for private(i) shared(pdt_a) 
        for(i=0;i<psize;i++)
         {
               .............
                pdt_a[i].gh   = g_hash_table_new(g_str_hash, compare_strings);
               ............
         }
#pragma omp parallel for private(i) shared(pdt_a,pit_a,lines,psize,nbuckets) 
        for(i=0;i<psize;i++)
        {
               for....
                   lookup = g_hash_table_lookup(gh, input);
              .....................
                    g_hash_table_insert(gh, data, p_data);
              .....................
                      g_hash_table_replace(gh,strdup(input),p_data);
        }
#pragma omp parallel for private(i)   // this parallel for will not be entered. Program will stop here and halt.
        for(i=0;i<psize;i++)
-- 
Qingpeng Niu
Department of Computer Science and Engineering at OSU 
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