udev performance
Eric Sandeen
sandeen at redhat.com
Tue Sep 11 18:23:43 UTC 2007
Ralf Ertzinger wrote:
> Hi.
>
> On Tue, 11 Sep 2007 16:02:14 +0200, Hans de Goede wrote
>
>> Cache the result in a dump of the resulting binary structs in disk
>> (ugly).
>
> Or let depmod create a more easily parseable format on the disk (as
> Jakub suggested).
I don't think it's yet been proven that parsing the files is accounting
for a significant portion of the time....
FWIW, I straced the parent udevd process during my F7 boot, and here's
how it spent most of it's time:
% time seconds usecs/call calls errors syscall
------ ----------- ----------- --------- --------- ----------------
67.93 0.157414 142 1105 288 waitpid
9.98 0.023130 4626 5 1 init_module
5.45 0.012638 2 6662 15 read
5.01 0.011601 48 240 execve
...
------ ----------- ----------- --------- --------- ----------------
100.00 0.231726 58010 6125 total
-Eric
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