KCachegrind is a visualisation tool for the profiling data generated by calltree, a memory profiling tool for valgrind. Any executable can be profiled using calltree without being recompiled, including multi-threaded applications, shared libraries, and plugins.
For visualising the output from profiling tools other than Valgrind, several converters can be found in the kcachegrind-converters package.
This package is part of the KDE Software Development Kit module.