Hi, I'm just curious, is there a problem with creating new sessions when needed for this kind of use-case ?
Thanks, Julien On 15-02-20 02:25 PM, Anand Neeli wrote: > Thanks for the reply. > > I think adding channels on the fly must be supported. > From debugging point of view, it will be good if we can add channels on > the fly with each channel having different set of events. > Even "stop tracing" and adding channel doesnt help now. > > Thanks, > Anand Neeli > > On Sat, Feb 21, 2015 at 12:35 AM, Philippe Proulx > <[email protected] <mailto:[email protected]>> wrote: > > On Fri, Feb 20, 2015 at 2:00 PM, Anand Neeli <[email protected] > <mailto:[email protected]>> wrote: > > Hi All, > > Is adding a new channel to an existing(running) session supported? > > No. > > > > i get following error when doing this. > > Error: Channel myc5: Tracing already started > > > > Is there any way to add channels on the fly? > > No. LTTng's documentation [1] states: > > Note: Because of a current limitation, all channels must be > created prior to beginning tracing in a given tracing session, > i.e. before the first time you do lttng start. > > Since a channel is automatically created by enable-event > only for the specified domain, you cannot, for example, enable > a kernel domain event, start tracing and then enable a user > space domain event because no user space channel exists > yet and it's too late to create one. > > For this reason, make sure to configure your channels > properly before starting the tracers for the first time! > > Phil > > [1] http://lttng.org/docs/#doc-enabling-disabling-channels > > > I'm using 2.4.1 version > > > > Thanks, > > Anand Neeli > > > > _______________________________________________ > > lttng-dev mailing list > > [email protected] <mailto:[email protected]> > > http://lists.lttng.org/cgi-bin/mailman/listinfo/lttng-dev > > > > > > > _______________________________________________ > lttng-dev mailing list > [email protected] > http://lists.lttng.org/cgi-bin/mailman/listinfo/lttng-dev > _______________________________________________ lttng-dev mailing list [email protected] http://lists.lttng.org/cgi-bin/mailman/listinfo/lttng-dev
