IOPING-I/O latency Monitor

Today while searching a tool for monitor I/O latency, accidentally I came across ioping.  I must say this is one of the good tools to monitor I/O latency in real time.  As generic ping command show network latency, ioping shows disk latency in real time.

You can download the software from the below URL.

How to install?

Once download the zip file ( from the above mentioned URL. Unzip the file as follows.

  • unzip

It will unzip the file into ioping-master directory.

  • Go to the directory ioping-master
  • Run command make
  • Run command make install
  • It will create executable file ioping in the same directory(ioping-master)

Now you installation is done and you are ready to use the command ioping to measure I/O latency of disks.

How to use?

  • ./ioping -c 5 /

4 KiB from / (ext4 /dev/sda3): request=1 time=370 us

4 KiB from / (ext4 /dev/sda3): request=2 time=469 us

4 KiB from / (ext4 /dev/sda3): request=3 time=534 us

4 KiB from / (ext4 /dev/sda3): request=4 time=540 us

4 KiB from / (ext4 /dev/sda3): request=5 time=462 us

— / (ext4 /dev/sda3) ioping statistics —

5 requests completed in 2.38 ms, 20 KiB read, 2.10 k iops, 8.22 MiB/s

min/avg/max/mdev = 370 us / 475 us / 540 us / 61 us

  • ./ioping -RL /

— / (ext4 /dev/sda3) ioping statistics —

1.05 k requests completed in 2.97 s, 262.2 MiB read, 353 iops, 88.4 MiB/s

min/avg/max/mdev = 2.44 ms / 2.83 ms / 37.0 ms / 1.45 ms

To get the list of all the available options, run  “./ioping” without any arguments.


Usage: ioping [-LABCDWRq] [-c count] [-w deadline] [-pP period] [-i interval]

[-s size] [-S wsize] [-o offset] directory|file|device

ioping -h | -v

-c <count>      stop after <count> requests

-w <deadline>   stop after <deadline>

-p <period>     print raw statistics for every <period> requests

-P <period>     print raw statistics for every <period> in time

-i <interval>   interval between requests (1s)

-s <size>       request size (4k)

-S <wsize>      working set size (1m)

-o <offset>     working set offset (0)

-k              keep and reuse temporary working file

-L              use sequential operations (includes -s 256k)

-A              use asynchronous I/O

-C              use cached I/O

-D              use direct I/O

-W              use write I/O *DANGEROUS*

-R              seek rate test (same as -q -i 0 -w 3 -S 64m)

-B              print final statistics in raw format

-q              suppress human-readable output

-h              display this message and exit

-v              display version and exit