Allinea DDT Resolves an Unsolved Mystery at Argonne National Laboratory

Argonne National Laboratory - Allinea Software - case studyAllinea DDT helps scientists find an “impossible” bug that showed up at over 16,000 cores at the Argonne Leadership Computing Facility.

Situation: A plasma physics simulation that had previously run successfully crashes at over 16,000 cores on the IBM Blue Gene/Q system.

Solution: Run Allinea DDT in offline mode over the weekend and come back to find a report that pinpoints the problem.

Debuggers were essential to the process of migrating the early science applications onto Mira.
Kalyan Kumaran, Manager, Applications Performance Engineering at the ALCF