[lttng-dev] LTTng 2.9 sessiond misbehaving

Jérémie Galarneau jeremie.galarneau at gmail.com
Thu Oct 6 12:29:39 UTC 2016


On Oct 5, 2016 3:52 PM, "Thibault, Daniel" <Daniel.Thibault at drdc-rddc.gc.ca>
wrote:
>
> Interesting.  Rebuilt the entire LTTng set with the stable-1.8 releases
(stable-0.9 for userspace-rcu) and I see the same behaviour:
> When I hit ctrl-c in the daemon's shell, it doesn't respond and the CPU
usage goes crazy (~90%).  Can't sudo kill it (or lttng-runas) either.
>
> What's strange is that if instead of:
>
> $ lttng-sessiond -vvv 2>&1 | tee lttng-sessiond.2.log
>
> I do:
>
> $ lttng-sessiond 2>&1 | tee lttng-sessiond.3.log
>
> Then ctrl-c terminates lttng-sessiond normally.
>
> Using just the first level of verbosity:
>
> $ lttng-sessiond -v 2>&1 | tee lttng-sessiond.4.log
>
> also misbehaves.  Somehow -v is responsible?
>
> At this point, should I open a bug?

I'm assuming you meant 2.8.
Open a bug and we'll try to reproduce it.

Does the problem occur with the other verbosity levels? (-vv, -vvv)

Thanks,
Jérémie

>
> Daniel U. Thibault, M.Sc.²
>
> Informaticien scientifique, CME-PSC, Centre de recherches de Valcartier
> Recherche et développement pour la défense Canada / Gouvernement du Canada
> daniel.thibault at drdc-rddc.gc.ca / Tél: 418-844-4000x4245 Téléc:
418-844-4538
> daniel.thibault at forces.gc.ca / Tél: 418-844-4000x4245 Téléc: 418-844-4538
>
> Computer Scientist, MCCS-SPC, Valcartier Research Centre
> Defence Research and Development Canada / Government of Canada
> daniel.thibault at drdc-rddc.gc.ca / Tel: 418-844-4000x4245 Fax: 418-844-4538
> daniel.thibault at forces.gc.ca / Tel: 418-844-4000x4245 Fax: 418-844-4538
>
> DRDC is an agency of the Department of National Defence / RDDC est une
agence du ministère de la Défense nationale
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