Hello,
I'm new to lttng so I tried to follow the 'Quick Start' tutorial from
lttng.org.
I have installed LTTng Stable 2.10 PPA (lttng-tools, lttng-modules-dkms,
liblttng-ust-dev). At very beginning I am facing a problem with kernel
tracking:
~/lttng_train$ sudo lttng create my
Session my created.
Traces will be written in /home/szymon/lttng-traces/my-20181130-222008
~/lttng_train$ sudo lttng list --kernel
Error: Unable to list kernel events: Kernel tracer not available
Error: Command error
Any ideas? Thanks for support!
Additional info:
~/lttng_train$ dpkg -l | grep lttng
ii liblttng-ctl0:amd64
2.10.5-1~ubuntu16.04.1 amd64 LTTng
control and utility library
ii liblttng-ust-ctl4:amd64
2.10.2-1~ubuntu16.04.1 amd64 LTTng 2.0
Userspace Tracer (trace control library)
ii liblttng-ust-dev:amd64
2.10.2-1~ubuntu16.04.1 amd64 LTTng 2.0
Userspace Tracer (development files)
ii liblttng-ust-python-agent0:amd64
2.10.2-1~ubuntu16.04.1 amd64 LTTng 2.0
Userspace Tracer (Python agent native library)
ii liblttng-ust0:amd64
2.10.2-1~ubuntu16.04.1 amd64 LTTng 2.0
Userspace Tracer (tracing libraries)
ii lttng-modules-dkms
2.10.8-1~ubuntu16.04.1 all Linux Trace
Toolkit (LTTng) kernel modules (DKMS)
ii lttng-tools
2.10.5-1~ubuntu16.04.1 amd64 LTTng
control and utility programs
~$ uname -a
Linux szymon 4.4.0-98-generic #121-Ubuntu SMP Tue Oct 10 14:24:03 UTC
2017 x86_64 x86_64 x86_64 GNU/Linux
~$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 16.04.5 LTS
Release: 16.04
Codename: xenial
~/lttng_train$ ps aux | grep lttng-sessiond
root 7862 0.0 0.3 859960 10880 ? Ssl 19:12 0:00
/usr/bin/lttng-sessiond
szymon 14853 0.0 0.0 15440 936 pts/1 S+ 22:21 0:00 grep
--color=auto lttng-sessiond
~/lttng_train$ lsmod | grep lttng
~/
~/lttng_train$ sudo lttng-sessiond -vvv
DEBUG1 - 00:16:41.328643679 [16578/16578]: [sessiond configuration]
DEBUG1 - 00:16:41.328715142 [16578/16578]: verbose: 3
DEBUG1 - 00:16:41.328723618 [16578/16578]: verbose consumer: 0
DEBUG1 - 00:16:41.328729230 [16578/16578]: quiet mode:
False
DEBUG1 - 00:16:41.328735428 [16578/16578]: agent_tcp_port:
[5345, 5354]
DEBUG1 - 00:16:41.328741084 [16578/16578]: application socket timeout: 5
DEBUG1 - 00:16:41.328761096 [16578/16578]: no-kernel:
False
DEBUG1 - 00:16:41.328776829 [16578/16578]: background:
False
DEBUG1 - 00:16:41.328788328 [16578/16578]: daemonize:
False
DEBUG1 - 00:16:41.328800092 [16578/16578]: signal parent on start:
False
DEBUG1 - 00:16:41.328812153 [16578/16578]: tracing group name:
tracing
DEBUG1 - 00:16:41.328823395 [16578/16578]: kmod_probe_list:
None
DEBUG1 - 00:16:41.328834022 [16578/16578]: kmod_extra_probe_list:
None
DEBUG1 - 00:16:41.328848328 [16578/16578]: rundir:
/var/run/lttng
DEBUG1 - 00:16:41.328857048 [16578/16578]: application socket path:
/var/run/lttng/lttng-ust-sock-7
DEBUG1 - 00:16:41.328866302 [16578/16578]: client socket path:
/var/run/lttng/client-lttng-sessiond
DEBUG1 - 00:16:41.328881494 [16578/16578]: wait shm path:
/lttng-ust-wait-7
DEBUG1 - 00:16:41.328890337 [16578/16578]: health socket path:
/var/run/lttng/sessiond-health
DEBUG1 - 00:16:41.328896087 [16578/16578]: LTTNG_UST_CLOCK_PLUGIN:
None
DEBUG1 - 00:16:41.328902562 [16578/16578]: pid file path:
/var/run/lttng/lttng-sessiond.pid
DEBUG1 - 00:16:41.328909781 [16578/16578]: lock file path:
/var/run/lttng/lttng-sessiond.lck
DEBUG1 - 00:16:41.328916938 [16578/16578]: session load path:
None
DEBUG1 - 00:16:41.328924592 [16578/16578]: agent port file path:
/var/run/lttng/agent.port
DEBUG1 - 00:16:41.328936395 [16578/16578]: consumerd32 path:
/var/run/lttng/ustconsumerd32
DEBUG1 - 00:16:41.328947517 [16578/16578]: consumerd32 bin path:
Unknown
DEBUG1 - 00:16:41.328961683 [16578/16578]: consumerd32 lib dir:
Unknown
DEBUG1 - 00:16:41.328970009 [16578/16578]: consumerd32 err unix sock
path:/var/run/lttng/ustconsumerd32/error
DEBUG1 - 00:16:41.328977730 [16578/16578]: consumerd32 cmd unix sock
path:/var/run/lttng/ustconsumerd32/command
DEBUG1 - 00:16:41.328985023 [16578/16578]: consumerd64 path:
/var/run/lttng/ustconsumerd64
DEBUG1 - 00:16:41.328992714 [16578/16578]: consumerd64 bin path:
/usr/lib/x86_64-linux-gnu/lttng/libexec/lttng-consumerd
DEBUG1 - 00:16:41.329005793 [16578/16578]: consumerd64 lib dir:
/usr/lib/x86_64-linux-gnu
DEBUG1 - 00:16:41.329017089 [16578/16578]: consumerd64 err unix sock
path:/var/run/lttng/ustconsumerd64/error
DEBUG1 - 00:16:41.329028919 [16578/16578]: consumerd64 cmd unix sock
path:/var/run/lttng/ustconsumerd64/command
DEBUG1 - 00:16:41.329040967 [16578/16578]: kconsumerd path:
/var/run/lttng/kconsumerd
DEBUG1 - 00:16:41.329053218 [16578/16578]: kconsumerd err unix sock
path: /var/run/lttng/kconsumerd/error
DEBUG1 - 00:16:41.329064330 [16578/16578]: kconsumerd cmd unix sock
path: /var/run/lttng/kconsumerd/command
DEBUG3 - 00:16:41.329076040 [16578/16578]: Creating LTTng run
directory: /var/run/lttng (in create_lttng_rundir() at main.c:5306)
Error: A session daemon is already running.
DEBUG1 - 00:16:41.329161207 [16578/16578]: Cleaning up options (in
sessiond_cleanup_options() at main.c:648)
DEBUG1 - 00:16:41.329178082 [16578/16578]: Destroying run_as worker
(in run_as_destroy_worker() at runas.c:709)
Regards,
Simon
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