Reco, on 2019-08-16: > On Fri, Aug 16, 2019 at 02:31:38PM +0200, danwe wrote: > > is there any program to test the intern latency of Debian? So > > I just need > > to know how much time the Linux Kernel needs to response to a > > request. [...] > bpftrace definitely can do it, but some learning is required.
Yes, I confirm that is a great tool!
The following page is a nice kick starter to begin to proceed to
measures and various data acquisition, teaching by example:
https://github.com/iovisor/bpftrace/blob/master/docs/tutorial_one_liners.md
Just be careful with the injection of code at trace points or
kprobes: the more you inject code for your measure, the more the
targeted kernel operation will take time, thus slowing the
machine et providing you with underestimated results.
Have fun, :)
--
Étienne Mollier <[email protected]>
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