seekwatcher 0.15

July 7, 2024

seekwatcher-0.15 is here!

seekwatcher is a tool to visualize access to the block device.

It’s been 2.5 years since seekwatcher-0.14 release. The only change is the switch from mencoder to ffmpeg tool. While at it default codec is switched from MPEG2 to H264.

As usual here is the program’s result ran against btrfs scrub on my device:

$ seekwatcher -t scrub.trace -p 'echo 3 > /proc/sys/vm/drop_caches; sync; btrfs scrub start -B /' -d /dev/nvme1n1p2
$ seekwatcher -t scrub.trace -o scrub.mpeg --movie
$ seekwatcher -t scrub.trace -o scrub.png

Outputs:

H264 makes video size comparable to the image report size.

Have fun!