The easiest way to profile Ceph's CPU consumption is to use the oprofile system-wide profiler.
If you are using a Debian/Ubuntu distribution, you can install oprofile by
executing the following:
sudo apt-get install oprofile oprofile-gui
To compile Ceph for profiling, first clean everything.
make distclean
Then, export the following settings so that you can see callgraph output.
export CFLAGS="-fno=omit-frame-pointer -O2 -g"
Finally, compile Ceph.
./autogen.sh ./configure make
You can use make -j to execute multiple jobs depending upon your system. For
example:
make -j4
Ensure that you disable lockdep. Consider setting logging to
levels appropriate for a production cluster. See Ceph Logging and Debugging
for details.
See the CPU Profiling section of the RADOS Troubleshooting documentation for details on using Oprofile.