simple disk I/0 latency measuring tool
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koct9i ioping: release 1.1
Signed-off-by: Konstantin Khlebnikov <khlebnikov@yandex-team.ru>
Latest commit 438e570 Sep 11, 2018

README.md

ioping

An tool to monitor I/O latency in real time. It shows disk latency in the same way as ping shows network latency.

Homepage: https://github.com/koct9i/ioping/ (migrated from http://code.google.com/p/ioping/)

Please send your patches, issues and questions to https://github.com/koct9i/ioping/issues/

Supported OS

  • GNU/Linux
  • GNU/HURD
  • Windows
  • OS X
  • FreeBSD
  • DragonFlyBSD
  • OpenBSD

Packages

Examples

Show disk I/O latency using the default values and the current directory, until interrupted

$ ioping .
4096 bytes from . (ext4 /dev/sda3): request=1 time=0.2 ms
4096 bytes from . (ext4 /dev/sda3): request=2 time=0.2 ms
4096 bytes from . (ext4 /dev/sda3): request=3 time=0.3 ms
4096 bytes from . (ext4 /dev/sda3): request=4 time=12.7 ms
4096 bytes from . (ext4 /dev/sda3): request=5 time=0.3 ms
^C
--- . (ext4 /dev/sda3) ioping statistics ---
5 requests completed in 4794.0 ms, 364 iops, 1.4 MiB/s
min/avg/max/mdev = 0.2/2.8/12.7/5.0 ms

Measure disk seek rate (iops, avg)

$ ioping -R /dev/sda

--- /dev/sda (device 465.8 GiB) ioping statistics ---
186 requests completed in 3004.6 ms, 62 iops, 0.2 MiB/s
min/avg/max/mdev = 6.4/16.0/26.8/4.7 ms

Measure disk sequential speed (MiB/s)

$ ioping -RL /dev/sda

--- /dev/sda (device 465.8 GiB) ioping statistics ---
837 requests completed in 3004.1 ms, 292 iops, 72.9 MiB/s
min/avg/max/mdev = 2.0/3.4/28.9/2.0 ms

Authors

Licensed under GPLv3 (or later) http://www.gnu.org/licenses/gpl-3.0.txt