Production deployment updates

Darshan has been successfully deployed on both the Surveyor and Intrepid BG/P systems at Argonne National Laboratory as of January 14, 2010!  This means that all newly compiled applications are using Darshan by default on those systems.

Upcoming development work will be focused on how to mine the Darshan data to learn more about how users perform I/O at leadership scale.

Darshan 1.1.9 release


  • Added “fast” version of each BG/P compiler
  • Added experimental scripts in test directory to run fsstats in parallel
  • Kevin Harms: Added experimental utilities for loading darshan results into SQL
  • Use exclusive flag when opening output file (to protect against file name collision)
  • Rob Ross: updates to allow command line tools to build on Darwin
  • Bug fix for pnetcdf configure problem reported by Rob Latham; darshan now always pulls in MPI_Wtime() symbol at link time

Darshan 1.1.9 is now available on the download page.

Darshan 1.1.8 release


  • Added tracking of file system type and mount point for each file
  • Added tracking of file size at open time (CP_SIZE_AT_OPEN)
  • Moved sync cost to be counted in cumulative write time rather than cumulative metadata time
  • Added sync as a separate category in counters
  • Bug fix to most frequent access size table in
  • Converted all utilities to use darshan-logutils api for reading output files
  • Added backwards compatibility to darshan-logutils routines
  • Kevin Harms: Added darshan-analyzer utility to summarize usage of MPI-IO, pNetCDF, HDF5, and shared files across a set of output files
  • Fixed bug field listing for darshan-diff utility

Darshan 1.1.8 is now available on the download page.

Darshan 1.1.4 release


  • Track files opened via Parallel NetCDF
  • Track files opened via HDF5
  • Record slowest individual POSIX read and write times along with access size for those operations
  • Inspect symbols at compile time to determine whether to enable Darshan or not based on the presence of MPI and PMPI symbols
  • Use GNU and IBM compilers from path rather than hard coded location
  • Simplify warning message if unable to open log file
  • Remove unused internal benchmark routines

This release is now available on the download page.  Note that the output files generated by Darshan 1.1.4 are not compatible with the output files generated by 1.1.3.

Darshan 1.1.1 release


  • Set default permissions to 0400 (user read only) for output files
  • Automatically disable Darshan at link time if common PMPI libraries are detected in the command line
  • Experimental tool ( to automatically generate Darshan-enabled mpicc scripts

This release is now available on the download page.