udev performance

Harald Hoyer harald at redhat.com
Tue Sep 11 16:17:54 UTC 2007

Harald Hoyer schrieb:
> Ok, did this with a rules-everything-rawhide on my laptop:
> 26 seconds
> 85% (22.3s) in modprobe
> 7.5% (2s) in 60-openct.rules:26 PROGRAM="/bin/sleep 0.1"
> rest is below 0.5 seconds...

modprobe + kernel loading the modules is taking 22s
Normally most of the modprobes are executed in parallel, so you normally don't have to wait 22s.
Here for my test, I turned on sequential processing of the events.
These are absolut times, including sleeps, e.g. for HW devices.
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