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[lttngtop.git] / README-LIVE
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1In order to use the (beta) live tracing features of LttngTop, you need these
2branches :
3
4git clone -b lttngtop-live git://git.dorsal.polymtl.ca/~jdesfossez/lttng-tools
5git clone -b lttngtop-live git://git.dorsal.polymtl.ca/~jdesfossez/babeltrace
6
7The only difference between these branches and the master branch is that they
8export an additional library that is used by lttngtop to do live tracing.
9
10You have to compile and install lttng-tools before babeltrace since there are
11dependencies on the library exposed by this special lttng-tools in babeltrace
12for live mmap buffer consuming.
13
14Then you can compile and use the live branch of LttngTop :
15git clone -b live git://git.lttng.org/lttngtop.git
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16
17Once everything is installed, you can start as root lttng-sessiond and use
18lttngtop (as root or from a user part of the "tracing" group).
19
20Note: if lttng-sessiond has been used to record a trace before starting
21lttngtop (normal lttng use-case), you need to restart it because it
22automatically spawned a consumer that prevents lttngtop from registering its
23own consumer. The same applies when you finish using lttngtop, you need to
24restart the lttng-sessiond daemon to allow others to record traces again. This
25is a know problem of integration that will be fixed.
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