Hi,
On 2016-09-15 10:36 AM, David Aldrich wrote:
Hi
I'm afraid I'm still struggling with getting started with lttng. To recap, I
want to use lttng + TraceCompass to monitor the scheduling of threads in my
multi-threaded C++ application on Ubuntu.
Here is my session:
$ sudo pkill lttng-sessiond
$ sudo lttng-sessiond
Error: Already running daemon.
Would you happen to have installed lttng via the ppa or apt-get/equivalent.
If I remember correctly those package install an actual daemon. If you
kill it, it will get re spawned.
Make sure that add your user to the tracing group then log out/log in.
Cheers
$ lttng create demo_session Spawning a session daemon Session demo_session
created.
Traces will be written in /home/<snip>/lttng-traces/demo_session-20160915-152653
<snip>:~$ PERROR [14956/14964]: bind inet: Address already in use (in
lttcomm_bind_inet_sock() at inet.c:109)
Warning: An other session daemon is using this JUL port. JUL support will be
deactivated not interfering with the tracing.
$ sudo lttng enable-event -k sched_switch -s demo_session
Error: Event sched_switch: Session name not found (channel channel0, session
demo_session)
Warning: Some command(s) went wrong
As you can see, each of these command generated a warning or error. Please
will you suggest where I am going wrong?
Best regards
David
--
Jonathan R. Julien
Efficios
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