Scalasca

Scalasca is a free and open-source software for measurement, analysis, and optimization of parallel program performance.^[1] It is licensed under the BSD-style license.^[2]

Scalasca
Developer(s)	Forschungszentrum Jülich and Technische Universität Darmstadt
Written in	C, C++
Operating system	Unix-like
Platform	IA-32, x64, ARM, PowerPC
Type	Profiling
License	BSD
Website	www.scalasca.org

Scalasca is mostly used for profiling scientific and engineering applications using OpenMP and/or MPI. It supports runtime analysis on supercomputers.^[3][4] The application being analysed needs first of all to be "instrumented": MPI usage is instrumented simply by linking the application to the measuring library, while OpenMP usage is instrumented by recompiling from source using Scalasca's modified compiler.^[5][6]