Well, i can create a new session for this use-case. But what will be the use of channels if they can be added on the fly. The dynamic configuration of adding/deleting events and channels wont be much useful if user has to pre-decide on what config is he going to do. I hope you get my point on the flexibility here.
Thanks, Anand Neeli On Sat, Feb 21, 2015 at 2:24 AM, Julien Desfossez <[email protected]> wrote: > 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 > > >
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