DISCONTINUATION OF PROJECT
This project will no longer be maintained by Intel.
Intel has ceased development and contributions including, but not limited to, maintenance, bug fixes, new releases, or updates, to this project.
Intel no longer accepts patches to this project.
If you have an ongoing need to use this project, are interested in independently developing it, or would like to maintain patches for the open source software community, please create your own fork of this project.
[email protected] Linux I/O Profiler (ioprof)
Contact:The Linux I/O profiler (ioprof) is a tool that provides significant insight into I/O workloads while remaining easy to use. It reports the following information:
- I/O Histogram - Great for determining size of hot data for SSD caching
- I/O Heatmap - Useful visualization to "see" where the hot data resides
- I/O Size Stats - IOPS and bandwidth stats, which is useful for mixed workloads
- Top Files (opt) - Can ID top accessed files in EXT3/EXT4 filesystems
- Zipf Theta - An estimate of Zipfian distribution theta
The tool is recommended to be used to further analyze I/O intensive workloads after running tools like iostat, since blktrace/blkparse can affect performance.
It is intended to be stable enough to use to profile production systems and makes every attempt to minimize resource utilization. In additon, the trace file is self-contained and can be offloaded for analysis on a separate system.
Contents
- README - This file
- LICENSE - GPLv2 license
- ioprof.pl - The script
Dependencies
Perl v5.x and Perl Core Library
Requires the following tools:
- fdisk
- blktrace
- blkparse
Optional PDF report requires:
- gnuplot
- pdf2latex
- terminal png
Design
The tool currently groups statistics into 1MB "buckets" to provide relatively accurate results, while minimizing system resources.
TODO:
- Confirm XFS filesystem tracing
- Add option to specifiy output file name
- Add option to specify temp directory
- Improve file mapping performance
Maintainers
Benjamin Donie [email protected]