On 27 Feb (19:22:35), Mariya Rampurawala wrote: > Thank you for the reply. > So the following commands i run on my terminal: > > mariya@HP:~$ lttng create mysession > Session mysession created. > Traces will be written in > /home/mariya/lttng-traces/mysession-20140227-191901 > mariya@HP:~$ lttng enable-event -a -u > All UST events are enabled in channel channel0
CCing back lttng-dev ML. If you have this problem, others have! :) Ok so this means that you enable all user space event for that session so you need to have an application that is instrumented with LTTng userspace tracer (lttng-ust) in order to collect data from that app. There are multiple examples in the git repository. For the kernel (-a -k), you need to install lttng-modules and start lttng-sessiond as root (or set yourself in the "tracing" group). Hope this help! Cheers! David > mariya@HP:~$ lttng start > Tracing started for session mysession > mariya@HP:~$ lttng stop > Waiting for data availability > Tracing stopped for session mysession > mariya@HP:~$ lttng view > Trace directory: /home/mariya/lttng-traces/mysession-20140227-191901 > > [error] Cannot open any trace for reading. > > [error] opening trace "/home/mariya/lttng-traces/mysession-20140227-191901" > for reading. > > [error] none of the specified trace paths could be opened. > > mariya@HP:~$ lttng-sessiond -vvv > DEBUG3: Creating LTTng run directory: /home/mariya/.lttng [in > create_lttng_rundir() at main.c:3692] > DEBUG1: Client socket path /home/mariya/.lttng/client-lttng-sessiond [in > main() at main.c:3995] > DEBUG1: Application socket path /home/mariya/.lttng/apps-lttng-sessiond [in > main() at main.c:3996] > DEBUG1: LTTng run directory path: /home/mariya/.lttng [in main() at > main.c:3997] > DEBUG2: UST consumer 32 bits err path: > /home/mariya/.lttng/ustconsumerd32/error [in main() at main.c:4006] > DEBUG2: UST consumer 32 bits cmd path: > /home/mariya/.lttng/ustconsumerd32/command [in main() at main.c:4008] > DEBUG2: UST consumer 64 bits err path: > /home/mariya/.lttng/ustconsumerd64/error [in main() at main.c:4017] > DEBUG2: UST consumer 64 bits cmd path: > /home/mariya/.lttng/ustconsumerd64/command [in main() at main.c:4019] > Error: Already running daemon. > > > > On Thu, Feb 27, 2014 at 7:12 PM, David Goulet <[email protected]> wrote: > > > On 27 Feb (16:36:24), Mariya Rampurawala wrote: > > > Hello, > > > I'm new to lttng. I use ubuntu 13.10. While performing basic operations, > > > on command lttng view, i get the following error. > > > [error] Cannot open any trace for reading. > > > > > > [error] opening trace > > "/home/mariya/lttng-traces/mysession-20140227-163353" > > > for reading. > > > > > > [error] none of the specified trace paths could be opened. > > > > > > > > > the o/p of the command "lttng-sessiond --verbose" is as follows > > > > > > DEBUG3: Creating LTTng run directory: /home/mariya/.lttng [in > > > create_lttng_rundir() at main.c:3692] > > > DEBUG1: Client socket path /home/mariya/.lttng/client-lttng-sessiond [in > > > main() at main.c:3995] > > > DEBUG1: Application socket path /home/mariya/.lttng/apps-lttng-sessiond > > [in > > > main() at main.c:3996] > > > DEBUG1: LTTng run directory path: /home/mariya/.lttng [in main() at > > > main.c:3997] > > > Error: Already running daemon. > > > > > > Could you please help me solve the error and proceed with my project? > > > > Hi, > > > > So like the error says, you have an already dunnring daemon but that > > shouldn't stop you from tracing stuff. > > > > Can you provide step by step the command you did and from there we can > > help you out more easily. The -vvv to the session daemon are good > > information to have also! > > > > Thanks! > > David > > > > > _______________________________________________ > > > lttng-dev mailing list > > > [email protected] > > > http://lists.lttng.org/cgi-bin/mailman/listinfo/lttng-dev > > > >
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