From mboxrd@z Thu Jan 1 00:00:00 1970 From: noam@lifeonair.com (Noam Cohen) Date: Wed, 17 Aug 2016 13:25:48 +0300 Subject: [lttng-dev] problem running/installing lttng on ubuntu 16.04 Message-ID: Hello I installed lttng on my ubuntu, and tried the "getting Started". I ran the helloWorld, and then $ lttng list --userspace Error: Unable to list UST events: No session daemon is available Error: Command error Waited a minute and retried, and now the output was as expected. $ lttng list --userspace UST events: ------------- PID: 17386 - Name: ./hello lttng_ust_tracelog:TRACE_DEBUG (loglevel: TRACE_DEBUG (14)) (type: tracepoint) < SNIP > hello_world:my_first_tracepoint (loglevel: TRACE_DEBUG_LINE (13)) (type: tracepoint) **Is it normal behavior?* Then, $ lttng create Session auto-20160817-132123 created. Traces will be written in /home/noam/lttng-traces/auto-20160817-132123 noam at noam-nuc:~/tmp/lttng$ lttng enable-event --userspace hello_world:my_first_tracepoint Error: Event hello_world:my_first_tracepoint: UST create channel failed (channel channel0, session auto-20160817-132123) How do I solve it? --------------------- system properties: noam at noam-nuc:~$ ps -ef | grep lttng noam 17410 17398 0 13:18 pts/3 00:00:00 lttng-sessiond -vvv noam 17411 17410 0 13:18 pts/3 00:00:00 lttng-runas -vvv noam 17442 17410 0 13:21 pts/3 00:00:00 lttng-consumerd -u --consumerd-cmd-sock /home/noam/.lttng/ustconsumerd64/command --consumerd-err-sock /home/noam/.lttng/ustconsumerd64/error --group tracing noam 17444 17442 0 13:21 pts/3 00:00:00 lttng-runas -u --consumerd-cmd-sock /home/noam/.lttng/ustconsumerd64/command --consumerd-err-sock /home/noam/.lttng/ustconsumerd64/error --group tracing noam 17480 17467 0 13:22 pts/7 00:00:00 grep --color=auto lttng noam at noam-nuc:~$ lsb_release -a No LSB modules are available. Distributor ID: Ubuntu Description: Ubuntu 16.04.1 LTS Release: 16.04 Codename: xenial Installed lttng using: sudo apt-get install lttng-tools lttng-modules-dkms liblttng-ust-dev $ lttng --version lttng (LTTng Trace Control) 2.7.1 - Herbe à Détourne -------------- next part -------------- An HTML attachment was scrubbed... URL: