Again, I have no knowledge of what this program is supposed to do. I would have thought it would only print once as there is only one answer, but I don't know the code. I'd suggest looking to see where it prints.
On Jul 12, 2019, at 6:32 AM, Dangeti Tharun kumar <cs15mtech11...@iith.ac.in <mailto:cs15mtech11...@iith.ac.in> > wrote: Program is a hybrid OpenMP and OpenMPI matrix multiplication. Time is 0.004174 4.000000 4.000000 4.000000 4.000000 4.000000 4.000000 4.000000 4.000000 4.000000 4.000000 4.000000 4.000000 4.000000 4.000000 4.000000 4.000000 This is the program output. If you see, it is just printed only once by the second case. On Fri, Jul 12, 2019 at 6:00 PM Ralph Castain via devel <devel@lists.open-mpi.org <mailto:devel@lists.open-mpi.org> > wrote: Afraid I don't know anything about that program, but it looks like it is printing the same number of times in both cases. It only appears to be more in the first case because the line wraps due to the number of PUs in the list On Jul 12, 2019, at 3:00 AM, Dangeti Tharun kumar <cs15mtech11...@iith.ac.in <mailto:cs15mtech11...@iith.ac.in> > wrote: Thanks, Ralph. Why is the output of the program(mm-llvm.out) being run is printed only once, while the mpirun from intel prints as many times as mentioned in the command line? On Thu, Jul 11, 2019 at 11:08 PM Ralph Castain via devel <devel@lists.open-mpi.org <mailto:devel@lists.open-mpi.org> > wrote: Because OMPI binds to core by default when np=2. If you have an OpenMP process, you want to add “--bind-to numa" to your mpirun cmd line. On Jul 11, 2019, at 10:28 AM, Dangeti Tharun kumar via devel <devel@lists.open-mpi.org <mailto:devel@lists.open-mpi.org> > wrote: Hi Devs, I have build openmpi with LLVM-8 compiler, I tried a simple example on a 2 socket machine. The following is the output of mpirun from ICC(intel c compiler package) and mpirun from openmpi: Why the CPU topology(highlighted below) identified by both of them are different? Not sure, if this behavior is correct. $>intel/bin/mpirun -np 2 ./mm-llvm.out OMP: Info #211: KMP_AFFINITY: decoding x2APIC ids. OMP: Info #211: KMP_AFFINITY: decoding x2APIC ids. OMP: Info #209: KMP_AFFINITY: Affinity capable, using global cpuid leaf 11 info OMP: Info #154: KMP_AFFINITY: Initial OS proc set respected: 0,1,4,5,8,9,12,13,16,17,20,21,24,25,28,29,32,33,36,37,40,41,44,45,48,49,52,53,56,57,60,61,64,65,68,69,72,73,76,77,80,81,84,85,88,89,92,93,96,97,100,101,104,105,108,109 OMP: Info #156: KMP_AFFINITY: 56 available OS procs OMP: Info #157: KMP_AFFINITY: Uniform topology OMP: Info #179: KMP_AFFINITY: 2 packages x 14 cores/pkg x 2 threads/core (28 total cores) OMP: Info #249: KMP_AFFINITY: pid 89736 tid 89736 thread 0 bound to OS proc set 0,1,4,5,8,9,12,13,16,17,20,21,24,25,28,29,32,33,36,37,40,41,44,45,48,49,52,53,56,57,60,61,64,65,68,69,72,73,76,77,80,81,84,85,88,89,92,93,96,97,100,101,104,105,108,109 OMP: Info #249: KMP_AFFINITY: pid 89736 tid 89752 thread 1 bound to OS proc set 0,1,4,5,8,9,12,13,16,17,20,21,24,25,28,29,32,33,36,37,40,41,44,45,48,49,52,53,56,57,60,61,64,65,68,69,72,73,76,77,80,81,84,85,88,89,92,93,96,97,100,101,104,105,108,109 OMP: Info #249: KMP_AFFINITY: pid 89736 tid 89753 thread 2 bound to OS proc set 0,1,4,5,8,9,12,13,16,17,20,21,24,25,28,29,32,33,36,37,40,41,44,45,48,49,52,53,56,57,60,61,64,65,68,69,72,73,76,77,80,81,84,85,88,89,92,93,96,97,100,101,104,105,108,109 OMP: Info #249: KMP_AFFINITY: pid 89736 tid 89754 thread 3 bound to OS proc set 0,1,4,5,8,9,12,13,16,17,20,21,24,25,28,29,32,33,36,37,40,41,44,45,48,49,52,53,56,57,60,61,64,65,68,69,72,73,76,77,80,81,84,85,88,89,92,93,96,97,100,101,104,105,108,109 OMP: Info #209: KMP_AFFINITY: Affinity capable, using global cpuid leaf 11 info OMP: Info #154: KMP_AFFINITY: Initial OS proc set respected: 2,3,6,7,10,11,14,15,18,19,22,23,26,27,30,31,34,35,38,39,42,43,46,47,50,51,54,55,58,59,62,63,66,67,70,71,74,75,78,79,82,83,86,87,90,91,94,95,98,99,102,103,106,107,110,111 OMP: Info #156: KMP_AFFINITY: 56 available OS procs OMP: Info #157: KMP_AFFINITY: Uniform topology OMP: Info #179: KMP_AFFINITY: 2 packages x 14 cores/pkg x 2 threads/core (28 total cores) OMP: Info #249: KMP_AFFINITY: pid 89737 tid 89737 thread 0 bound to OS proc set 2,3,6,7,10,11,14,15,18,19,22,23,26,27,30,31,34,35,38,39,42,43,46,47,50,51,54,55,58,59,62,63,66,67,70,71,74,75,78,79,82,83,86,87,90,91,94,95,98,99,102,103,106,107,110,111 OMP: Info #249: KMP_AFFINITY: pid 89737 tid 89755 thread 1 bound to OS proc set 2,3,6,7,10,11,14,15,18,19,22,23,26,27,30,31,34,35,38,39,42,43,46,47,50,51,54,55,58,59,62,63,66,67,70,71,74,75,78,79,82,83,86,87,90,91,94,95,98,99,102,103,106,107,110,111 OMP: Info #249: KMP_AFFINITY: pid 89737 tid 89756 thread 2 bound to OS proc set 2,3,6,7,10,11,14,15,18,19,22,23,26,27,30,31,34,35,38,39,42,43,46,47,50,51,54,55,58,59,62,63,66,67,70,71,74,75,78,79,82,83,86,87,90,91,94,95,98,99,102,103,106,107,110,111 OMP: Info #249: KMP_AFFINITY: pid 89737 tid 89757 thread 3 bound to OS proc set 2,3,6,7,10,11,14,15,18,19,22,23,26,27,30,31,34,35,38,39,42,43,46,47,50,51,54,55,58,59,62,63,66,67,70,71,74,75,78,79,82,83,86,87,90,91,94,95,98,99,102,103,106,107,110,111 Time is 0.004174 4.000000 4.000000 4.000000 4.000000 4.000000 4.000000 4.000000 4.000000 4.000000 4.000000 4.000000 4.000000 4.000000 4.000000 4.000000 4.000000 Time is 0.004542 4.000000 4.000000 4.000000 4.000000 4.000000 4.000000 4.000000 4.000000 4.000000 4.000000 4.000000 4.000000 4.000000 4.000000 4.000000 4.000000 $>openmpi/bin/mpirun -np 2 ./mm-llvm.out OMP: Info #211: KMP_AFFINITY: decoding x2APIC ids. OMP: Info #211: KMP_AFFINITY: decoding x2APIC ids. OMP: Info #209: KMP_AFFINITY: Affinity capable, using global cpuid leaf 11 info OMP: Info #154: KMP_AFFINITY: Initial OS proc set respected: 0,56 OMP: Info #156: KMP_AFFINITY: 2 available OS procs OMP: Info #157: KMP_AFFINITY: Uniform topology OMP: Info #209: KMP_AFFINITY: Affinity capable, using global cpuid leaf 11 info OMP: Info #154: KMP_AFFINITY: Initial OS proc set respected: 4,60 OMP: Info #179: KMP_AFFINITY: 1 packages x 1 cores/pkg x 2 threads/core (1 total cores) OMP: Info #156: KMP_AFFINITY: 2 available OS procs OMP: Info #157: KMP_AFFINITY: Uniform topology OMP: Info #179: KMP_AFFINITY: 1 packages x 1 cores/pkg x 2 threads/core (1 total cores) OMP: Info #249: KMP_AFFINITY: pid 89768 tid 89768 thread 0 bound to OS proc set 4,60 OMP: Info #249: KMP_AFFINITY: pid 89767 tid 89767 thread 0 bound to OS proc set 0,56 OMP: Info #249: KMP_AFFINITY: pid 89767 tid 89773 thread 1 bound to OS proc set 0,56 OMP: Info #249: KMP_AFFINITY: pid 89768 tid 89774 thread 1 bound to OS proc set 4,60 OMP: Info #249: KMP_AFFINITY: pid 89767 tid 89777 thread 3 bound to OS proc set 0,56 OMP: Info #249: KMP_AFFINITY: pid 89768 tid 89778 thread 3 bound to OS proc set 4,60 OMP: Info #249: KMP_AFFINITY: pid 89767 tid 89775 thread 2 bound to OS proc set 0,56 OMP: Info #249: KMP_AFFINITY: pid 89768 tid 89776 thread 2 bound to OS proc set 4,60 Time is 0.002159 4.000000 4.000000 4.000000 4.000000 4.000000 4.000000 4.000000 4.000000 4.000000 4.000000 4.000000 4.000000 4.000000 4.000000 4.000000 4.000000 -- Regards, DTharun _______________________________________________ devel mailing list devel@lists.open-mpi.org <mailto:devel@lists.open-mpi.org> https://lists.open-mpi.org/mailman/listinfo/devel _______________________________________________ devel mailing list devel@lists.open-mpi.org <mailto:devel@lists.open-mpi.org> https://lists.open-mpi.org/mailman/listinfo/devel -- Regards, DTharun _______________________________________________ devel mailing list devel@lists.open-mpi.org <mailto:devel@lists.open-mpi.org> https://lists.open-mpi.org/mailman/listinfo/devel -- Regards, DTharun
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