A Selective Profiling Tool: Towards Automatic Performance Tuning

We present some preliminary results of selective profiling in our efforts towards automatic performance tuning for scientific codes. Performance analysis and tuning are becoming very important with the increasing complexity and speed of high performance systems. Great efforts are necessary to tune applications for optimal performance on such systems. In our efforts to automate most, if not all, of the performance tuning process, we have developed a flexible profiling tool that can quickly pinpoint the performance bottlenecks and further refine the problem area. This is an important first step in our open framework with a rule-based approach for the ongoing PERCS project