------- Comment #5 from jakub at gcc dot gnu dot org 2008-09-20 08:22 ------- No, I didn't mean to ask you to try to work around it, I asked you to investigate why omp_get_num_procs returns 1 instead of 8. The gcc 4.3 vs. 4.4 difference only affects omp_get_max_threads, not omp_get_num_procs, so even omp_get_num_procs reports 1, the options are 1) the process has affinity set to just one CPU 2) GOMP_CPU_AFFINITY has been used 3) you have omp_get_num_procs defined elsewhere in your program, verify that libgomp function is really used. strace -f -e sched_getaffinity dump of the program could reveal 1), 2) can be determined by looking at the scripts you use to start the program (or by adding getenv call in the program to print that for you), 3) can be seen in the debugger and/or by using LD_DEBUG=all env var.
-- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37586
