[systemd-devel] How to profile units with perf? (was: logind: How to process enumerate buttons in parallel?)
Paul Menzel
pmenzel+systemd-devel at molgen.mpg.de
Wed Jul 18 14:08:43 UTC 2018
Dear systemd folks,
On 07/16/18 11:26, Lennart Poettering wrote:
> On Mo, 16.07.18 10:25, Paul Menzel wrote:
[…]
>> Do you have suggestions how to do that with systemd-logind?
>
> People tend to use "perf" for things like this these days.
Thank you, that’s what I wanted to use, but I am not really sure how
to do it with systemd units?
I failed by adapting the systemd-logind Exec line, as the permissions
for the perf counters(?) are not there.
Then I tried to add a perf service unit doing
/usr/sbin/perf_4.17 record -o /dev/shm/perf.data sleep 10
and order it before sysinit.target but that did not contain anything
useful.
Kind regads,
Paul
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