P66: Analyzing Multi-Layer I/O Behavior of HPC
Applications
SessionPoster Reception
Event Type
ACM Student Research Competition
Poster
Reception
TimeTuesday, November 14th5:15pm -
7pm
LocationFour Seasons Ballroom
DescriptionIn this work, we present an approach to analyze
multi-layer I/O behavior of HPC applications. For a
comprehensive analysis it is not sufficient to track I/O
operations on a single layer because applications may
combine multiple I/O paradigms (e.g., MPI I/O, NetCDF,
HDF5). Furthermore, I/O libraries may use another I/O
paradigm internally. With our approach, I/O activities
can be captured at any layer. This work introduces
methodologies to intercept calls to I/O libraries and
presents an event design to record applications’ I/O
activities. We implement our approach in the Score-P
measurement system and prove its usability with a study
of the Met Office/NERC Cloud Model (MONC) code.
