Darshan is a lightweight I/O characterization tool that transparently captures I/O access pattern information from HPC applications. Darshan can be used to tune applications for increased scientific productivity or to gain insight into trends in large-scale computing systems.

Please see the Darshan web page for more in-depth news and documentation.

The Darshan source tree is divided into two main parts:

• darshan-runtime: to be installed on systems where you intend to instrument MPI applications. See darshan-runtime/doc/darshan-runtime.txt for installation instructions.

• darshan-util: to be installed on systems where you intend to analyze log files produced by darshan-runtime. See darshan-util/doc/darshan-util.txt for installation instructions.

The darshan-test directory contains various test harnesses, benchmarks, patches, and unsupported utilites that are mainly of interest to Darshan developers.