this post was submitted on 14 May 2025

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crawlio: Tool that slows down I/O operations (github.com)

submitted 2 days ago by Serpent7776 to c/commandline

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Crawlio is a simple C tool that slows down I/O operations by adding a specified amount of time to each I/O call. It uses LD_PRELOAD.

Test application behaviour under slow I/O conditions
Bring back the dial-up nostalgia
Learn how to use LD_PRELOAD

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[–] [email protected] 2 points 1 day ago* (last edited 1 day ago) (1 children)

BPF,

or you can just use a CGroup.

https://www.freedesktop.org/software/systemd/man/latest/systemd.resource-control.html

[–] Serpent7776 1 points 1 day ago

AFAIK you can't do this with BPF as it doesn't have any kind of sleep functionality. I'm also not sure how would you achive this using cgroup, which are about quotas AFAIK.