X-Git-Url: https://git.lttng.org/?a=blobdiff_plain;f=doc%2Fquickstart.txt;h=ad40385b3b82a2e5c7bd5eaf2c89de09a322f1d0;hb=0133c1990185d0374ec06a751da23b7a84c54d78;hp=0cf44d69b0e45d6ae27cc516b85e17cd652574ce;hpb=617d7d159c22a17dd0191597945eb00303935e96;p=lttng-tools.git diff --git a/doc/quickstart.txt b/doc/quickstart.txt index 0cf44d69b..ad40385b3 100644 --- a/doc/quickstart.txt +++ b/doc/quickstart.txt @@ -36,13 +36,13 @@ The next sections explain how to do tracing :) Kernel Tracing -------------- -You have to modprobe the lttng-modules manually or the session daemon will do -it for you if those modules can be found on your system. +You can start the session daemon by invoking the command "ltt-sessiond", +or let the lttng command line tool do it for you. The session daemon +loads the LTTng tracer modules for you if those modules can be found on +your system. If they are not found, the kernel tracing feature will be +unavailable. -Again, you can then start the session daemon (ltt-sessiond) by hand or the -lttng command line tool will do it for you. - -List possible kernel events: +List available kernel events: # lttng list -k @@ -70,18 +70,18 @@ This is a new feature made possible by the new LTTng 2.0 kernel tracer. You can enable a dynamic probe and data will be output in the trace along side with your tracing data. -# lttng enable-event aname --probe symbol+0xffff7260695 +# lttng enable-event aname -k --probe symbol+0xffff7260695 or -# lttng enable-event aname --probe 0xffff7260695 +# lttng enable-event aname -k --probe 0xffff7260695 Either an
or a can be used for probes. You can also enable function tracer, which uses the Ftrace API (by Steven Rostedt). Again, data will be output in the trace. -# lttng enable-event aname --function +# lttng enable-event aname -k --function 4) Enable context information for an event: @@ -136,8 +136,9 @@ you need to use 'ustctl' to control user-space tracing. Reading a trace -------------- -To read your trace, you can use babeltrace which will text dump your the -trace. Please see http://www.efficios.com/ctf and git tree +The tool "Babeltrace" can be used to dump your binary trace into a +human-readable text format. Please see +http://www.efficios.com/babeltrace and git tree http://git.efficios.com/?p=babeltrace.git # babeltrace -n $HOME/lttng-traces/mysession--