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|---|---|---|
| .. | ||
| .gitignore | ||
| CMakeLists.txt | ||
| eventtrace.c | ||
| eventtrace.tp | ||
| librados.c | ||
| librados.tp | ||
| librbd.c | ||
| librbd.tp | ||
| objectstore.c | ||
| objectstore.tp | ||
| oprequest.c | ||
| oprequest.tp | ||
| osd.c | ||
| osd.tp | ||
| pg.c | ||
| pg.tp | ||
| README.md | ||
| tracing-common.h | ||
Installation
The LTTng libraries that ship with Ubuntu 12.04 have been very buggy, and the
generated header files using lttng-gen-tp have needed to be fixed just to
compile in the Ceph tree. The packages available in Ubuntu 14.04 seem to work
alright, and for older versions please install LTTng from the LTTng PPA.
https://launchpad.net/~lttng/+archive/ppa
Then install as normal
apt-get install lttng-tools liblttng-ust-dev
Add/Update Provider
Create tracepoint definition file
Add tracepoint definitions for the provider into a .tp file. Documentation
on defining a tracepoint can be found in man lttng-ust. By convention files
are named according to the logical sub-system they correspond to (e.g.
mutex.tp, pg.tp). And add a C source file to be compiled into the tracepoint
provider shared object, in which TRACEPOINT_DEFINE should be defined. See
LTTng document for details.
Place the .tp and the .c files into the src/tracing directory
and modify the CMake file src/tracing/CMakeLists.txt accordingly.