The hardware complexity of HPC systems has increased in parallel with the complexity of modern simulation and scale-bridging applications. Consequently, writing efficient software for these large- scale systems has become increasingly difficult. Understanding the interactions of hardware and software and their impacts on scalability in the presence of large numbers of compute cores is essential for optimizing HPC systems. However, in many cases it is simply too difficult to comprehend performance characteristics. The purpose of this workshop is to cross-pollinate the expertise of specialists in performance analysis and visualization. By facilitating the beginning of significant collaborations between these groups we hope to connect those already working in the development of performance tools with those working in the visualization of software performance at all scales.