force resolution of FDs, it's too awesome to be optional

[lttngtop.git] / README-LIVE

In order to use the (beta) live tracing features of LttngTop, you need these
branches :

git clone -b lttngtop-live git://git.dorsal.polymtl.ca/~jdesfossez/lttng-tools
git clone -b lttngtop-live git://git.dorsal.polymtl.ca/~jdesfossez/babeltrace

The only difference between these branches and the master branch is that they
export an additional library that is used by lttngtop to do live tracing.

You have to compile and install lttng-tools before babeltrace since there are
dependencies on the library exposed by this special lttng-tools in babeltrace
for live mmap buffer consuming.

Then you can compile and use the live branch of LttngTop :
git clone -b live git://git.lttng.org/lttngtop.git

Once everything is installed, you can start as root lttng-sessiond and use
lttngtop (as root or from a user part of the "tracing" group).

Note: if lttng-sessiond has been used to record a trace before starting
lttngtop (normal lttng use-case), you need to restart it because it
automatically spawned a consumer that prevents lttngtop from registering its
own consumer. The same applies when you finish using lttngtop, you need to
restart the lttng-sessiond daemon to allow others to record traces again. This
is a know problem of integration that will be fixed.