Topic: "Debugging your code with DDT"Speaker: Sergey Mashchenko, SHARCNETVideo link --- One of the important steps of developing or maintaining a code is debugging: checking the code for errors. Simple toy codes can be debugged using print statements, but realistic codes need specialized debugging tools. We have a powerful debugger "DDT" installed on Graham and Niagara clusters. This presentation will walk you through the steps required to start debugging your codes using DDT, and will present the main features of the software. It will cover a wide range of situations: from debugging serial codes (Python, C/C++, Fortran) to debugging parallel CPU codes (MPI, OpenMP) to debugging GPU codes (CUDA, ROCm/HIP) to debugging hybrid codes (combining MPI, CUDA etc.). No familiarity with DDT or debugging in general is required. ---The Compute Ontario Colloquia are weekly Zoom presentations on Advanced Research Computing, High Performance Computing, Research Data Management, and Research Software topics, delivered by staff from three Compute Ontario consortia (CAC, SciNet, SHARCNET) and guest speakers. The series began January 2023 and superseded similar series previously delivered by individual consortia (e.g. General Interest Seminars by SHARCNET or User Group Meeting TechTalks by SciNet). The colloquia are one hour long and include time for questions. No registration is required. Presentations are usually recorded and uploaded to the hosting consortium video channel (colloquia hosted by SHARCNET go to our youtube channel).