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Release 2018.09
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@jmellorcrummey jmellorcrummey released this 01 Oct 02:38
· 1766 commits to master since this release
release-2018.09
7b9a814

Visible Improvements

hpcrun

Significantly enhanced robustness of HPCToolkit's measurement infrastructure to better support profiling of highly multithreaded applications.

  • Overhauled initialization to support profiling of applications that create threads in constructors that must synchronize before main is entered.

  • Improved call stack unwinding on all platforms.

  • Improved support for collecting call path samples that include frames in the Linux kernel.

  • Refined handling for precise hardware events in the Linux perf sample source.

  • Refined scripts to avoid interactions with Darshan that can cause deadlock.

  • Note jobid in jsrun jobs.

hpcstruct

Improved program structure recovery of loops, inlined code, and outlined code using binary analysis of highly-optimized code.

  • Improved attribution of loops to source lines.

  • Made hpcstruct's output deterministic for irreducible loops.

  • Improved attribution for PLT stubs.

  • Improved name demangling.

hpcprof/hpcprof-mpi

Significantly enhanced robustness of hpcprof-mpi.

  • Emit a warning and proceed with analysis if measurement data is salvageable rather than aborting with a fatal error.

  • Tolerate missing load modules. Generate a placeholder if necessary and emit a warning rather than triggering a fatal error.

  • Tolerate cases where some ranks in hpcprof-mpi are not assigned any profiles to analyze.

  • Avoid unnecessary per-rank duplication of informational messages.

hpcviewer

  • Calculate costs for inlined functions in bottom-up view and flat view as one would if they were actual functions.

Documentation

  • Updated man pages and manuals.

Streamline user view

Migrated developer-centric functionality out of HPCToolkit's bin directory.

  • Migrated hpcsummary to libexec/hpctoolkit.
  • Removed support for creating DOT files from hpcstruct. Create a separate executable for developer use in libexec/hpctoolkit.
  • Updated hpcproftt to remove stale command-line options. Migrate hpcproftt to libexec/hpctoolkit.

Bug Fixes

  • Updated build system to automake 1.5.1 to handle newer Linux software stacks.
  • Fixed latex2man script for perl 5.26.1.
  • Fixed configuration to skip kernel sampling and disable support for BLOCKTIME for older Linux kernels.
  • Fixed bugs related to handling Linux perf_events at runtime.
  • Fixed race conditions that arise where samples arrive after shutting down a sample source or when monitoring ends while processing a sample.
  • Corrected handling in HPCToolkit's measurement infrastructure for dlclose, which is frequently used by OpenMPI.
  • Corrected support for libunwind to properly terminate unwinds on ARM when compilers put DWARF FDEs in .debug_frame rather than .eh_frame segments.
  • Adjusted unwinder support for Power architectures to avoid libunwind.
  • Adjusted support for integrating libunwind and binary analysis on x86_64 architectures.
  • When measuring an execution, if hpcfnbounds quits wait for it to finish to avoid zombies.
  • Corrected hpcprof-mpi to handle the corner case where an MPI rank is assigned no profiles to analyze.
  • Added comprehensive error handling in hpcprof-mpi when writing files, especially to handle disk full or quota exceeded errors.
  • Fix selection of an alternate output directory in hpcprof-mpi.
  • Report an error if hpcstruct is run on anything other than an ELF binary.
  • Correct handling for pseudo-roots such as in hpcviewer's flat view.
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