Notable Platform Changes
- Added support for Intel Knights Landing (KNL), treated as an x86-64 flavor.
- Added preliminary measurement, analysis, attribution, and GUI support for Power8/LE.
- Added preliminary measurement, analysis, and attribution support for ARM64.
Principal Technical Improvements
- Overhauled data structures for managing shared state (binary analysis results) in hpcrun to avoid mutual exclusion in the common case. This improves manycore scalability.
- Overhaul binary analysis to better attribute performance to highly-optimized code that involves inlined functions, inlined templates, outlined OpenMP functions.
Infrastructure Improvements in hpctoolkit-externals
- Removed dependence on a locally-modified copy of binutils and switched to use binutils 2.27, which supports Power8/LE and ARM64.
- Updated build infrastructure to use newer versions of autotools that that recognize the Power8 little-endian system type.
- autoconf 2.69.
- automake 1.15.
- libtool 2.4.6.
- Use boost version 1.59.0.
- Use dyninst version 9.3.0.
- Use elfutils version 0.167.
- Use libdwarf version 2016-11-24.
- Use libmonitor version from Sept 15, 2016.
- Use libunwind version from Feb 29, 2016.
Known Problems
- HPCToolkit's GUI's are not yet available for ARM64 platforms.
- Binary analysis on Power8/LE may fail to fully analyze routines that contain switch tables. This has several effects.
- Samples attributed to code regions in a routine that are overlooked by the binary analyzer will be attributed to the first source line of the enclosing routine.
- Loops in code regions that are overlooked will not be reported in hpcviewer.