The strace output I/O analyser is a tool to analyze the I/O behaviour of serial and parallel applications. It traces the system calls and generates statistics for every accessed file.
The strace output I/O analyzer requires
- strace to generate traces
- python 3.4 or greater to analyze the traces
Just clone the directory from https://github.com/cniethammer/strace-analyzer and use the scripts. No additional steps required.
Generate a trace with the strace wrapper
./strace-wrapper.sh ./my_app [APP OPTIONS]
or use the strace-wrapper.sh for MPI parallel programs like
mpirun [MPI OPTIONS] ./strace-wrapper.sh ./my_app [APP OPTIONS]
which will generate a set of strace log files - one for each MPI process. The log files will be stored in a directory strace-logs under the current path. If the directory does not exist, it will be created. The LOGDIR variable may be used to specify another directory for the log files:
LOGDIR=my_log_dir mpirun [MPI OPTIONS] ./strace-wrapper.sh ./my_app [APP OPTIONS]
For MPI programs running with large number of processes the number of traced processes may have to be narrowed down. The RANK_FILTER variable allows to specify a regex pattern which is matched agains the MPI rank number. Only processes with ranks matching this regex will be traced.
RANK_FILTER='[0-4]' mpirun [MPI OPTIONS] ./strace-wrapper.sh ./my_app [APP OPTIONS]
To analyze the created traces run
./strace_io_stats.py *.strace
To get help how to use and control strace_io_stats.py run
./strace_io_stats.py --help
Copyright (c) 2017 HLRS, University of Stuttgart. This software is published under the terms of the BSD license.
Contact: Christoph Niethammer niethammer@hlrs.de