Darshan users, Darshan version 3.4.1 is now officially available for download here: https://www.mcs.anl.gov/research/projects/darshan/download/. This release includes the following new features, bug fixes, etc.: * Added comprehensive instrumentation of PnetCDF APIs via PNETCDF_FILE and PNETCDF_VAR modules (contributed by Wei-Keng Liao) * disabled by default, enabled by passing `--enable-pnetcdf-mod` to configure * Modified Darshan log format to support a max of 64 instrumentation modules, since the current version of Darshan reached the old max (16) * Modified Darshan to report job start/end times at nanosecond granularity (previously only second granularity was possible) * Added support for instrumenting H5Oopen family of calls * Modified HDF5 module extraction of dataspace selection details * Extraction of point selections now possible regardless of HDF5 version * H5S_ALL selections are no longer counted as regular hyperslab accesses * Fixed bug causing no instrumentation of child processes of fork() calls (reported by Rui Wang) * Deprecated --file-list and --file-list-detailed options in darshan-parser * Added "darshan_accumulator" API to the logutils library * _create(), _inject(), _emit(), and _destroy() * generalizes the mechanism for producing summation records and derived metrics for sets of records from a given module * refactored darshan-parser to use new API * implemented support for accumulators in POSIX, STDIO, and MPIIO modules * Fixed memory leak in darshan-util helper functions used by PyDarshan * darshan_log_get_name_records * darshan_log_get_filtered_name_records * Integrated the µnit Testing Framework in darshan-util * implemented unit tests for darshan_accumlator API We have also released PyDarshan 3.4.1.0 on PyPI, which includes a number of improvements: * Fixed memory leaks in the following backend CFFI bindings (reported by Jesse Hines): * log_get_modules * log_get_mounts * log_get_record * log_get_name_records * log_lookup_name_records * Added PnetCDF module information to job summary tool * Testing modifications: * Switched to use of context managers for log Report objects to avoid test hangs in certain environments * Marked tests requiring lxml package as xfail when not installed Documentation for Darshan and PyDarshan is available here: https://www.mcs.anl.gov/research/projects/darshan/documentation/. Please report any questions, issues, or concerns with this release using this mailing list, or by opening an issue on our GitHub: https://github.com/darshan-hpc/darshan. Thanks! --Darshan team