The GRVY Toolkit is a utility library used to house various support functions often required for application development of high-performance, scientific applications. The library is written in C++, but provides an API for development in C and Fortran. The primary functionality provided by the library is categorized as follows:

• a flexible method for parsing keyword driven input files (with backwards-compatibility support)
• a performance timing mechanism to provide a simple summary of individual code section performance along with basic statistics
• an HDF5 based historical performance mechanism for logging application performance over time on various compute resources
• a simple priority-based logging mechanism to control application messages
• utilities for offloading out-of-core read/write operations to a pool of distributed shared-memory nodes using MPI for data transfer miscellaneous
• file handling and math utilities

For more detailed API information, please refer to the documentation.