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<p>Darshan version 2.3.1 is now available for <a title="Download"
href="http://press3.mcs.anl.gov/darshan/download/">download</a>.
This release includes several bug fixes and enhancements,
including improvements for Cray, IBM Blue Gene, and Linux cluster
environments. One of the most notable new features is that
Darshan now supports the MPICH profiling configuration file method
for instrumentation, which simplifies installation on some
platforms. This release also includes a new regression testing
framework.</p>
<p>The full changelog since 2.3.0:</p>
<p>darshan-2.3.1<br>
=============<br>
* added documentation and example configuration files for using
the -profile or $MPICC_PROFILE hooks to add instrumentation to
MPICH-based MPI implementations without generating custom wrapper
scripts<br>
* Add wrappers for mkstemp(), mkostemp(), mkstemps(), and
mkostemps() (reported by Tom Peterka)<br>
* Change OPEN_TIMESTAMP field to report timestamp right before
open() is invoked rather than after timestamp after open is
completed. NOTE: updated log format version to 2.06 to reflect
this change.<br>
* Change start_time and end_time fields in job record to use min
and max (respectively) across all ranks<br>
* Fix bug in write volume data reported in file system table in
darshan-job-summary.pl (reported by Matthieu Dorier)<br>
* Clean up autoconf test for zlib and make zlib mandatory
(reported by Kalyana Chadalavada)<br>
* add –start-group and –end-group notation to Darshan libraries
for Cray PE 2.x environment to fix link-time corner cases (Yushu
Yao)<br>
* improve y axis labels on time interval graphs in
darshan-job-summary.pl (reported by Tom Peterka)<br>
* misc. improvements to darshan-parser –perf output (reported by
Shane Snyder)<br>
– indicate which rank was slowest in unique file results<br>
– label I/O vs. meta time more clearly<br>
– include unique file meta time in agg_perf_by_slowest calculation<br>
* added regression test script framework in
darshan-test/regression/<br>
– currently support platforms include:<br>
– Linux with static linking and generated compiler wrappers<br>
– Linux with static linking and profiler configuration files<br>
– Linux with dynamic linking and LD_PRELOAD<br>
– Blue Gene/Q with static linking and profiler configuration files<br>
* update darshan-gen-fortran.pl and darshan-gen-cxx.pl to support
new library naming conventions in MPICH 3.1.1 and higher<br>
* update documentation to reflect known issues with some versions
of MPICH<br>
* Cray platforms: modify darshan-runtime so that link-time
instrumentation options are only used when statically linking via
Libs.private. (reported by Kalyana Chadalavada)<br>
</p>
<p>thanks,<br>
-Darshan development team<br>
</p>
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