You'll want to look at: lttng enable-channel --help
(specifically --subbuf-size and --num-subbuf options). and you'll need to specify a channel name for the events you enable (see lttng enable-event --help). Thanks, Mathieu * Sam Bradshaw (sbradshaw) ([email protected]) wrote: > Hello, > > I'm trying to use lttng tools to identify some block stack latencies. I'm > tracing > syscall, softirq_*, and block_* kernel entry points using the latest 2.0 > lttng on > RHEL 6.3 with a 3.6.6 kernel. > > When I 'lttng view' the trace, I get all sorts of messages like: > > "[warning] Tracer discarded XXXX events between <timestamp1> and > <timestamp2>. You > should consider recording a new trace with larger buffers or with fewer > events > enabled." > > How/where do I modify the code to enable larger buffers? Its not obvious > from any > of the documentation I could find or a superficial code inspection. > > Thanks, > -Sam > > _______________________________________________ > lttng-dev mailing list > [email protected] > http://lists.lttng.org/cgi-bin/mailman/listinfo/lttng-dev -- Mathieu Desnoyers Operating System Efficiency R&D Consultant EfficiOS Inc. http://www.efficios.com _______________________________________________ lttng-dev mailing list [email protected] http://lists.lttng.org/cgi-bin/mailman/listinfo/lttng-dev
