View source for Miniconf-UK/2014/debugging profiling

In this session I aim to go through some nice tricks that I have picked up
whilst debugging and profiling workloads. Most of these have been learnt by
banging my head against the desk, and would have saved me time had I known
about them :-).

A lot of the material will be introductory, but I hope parts of it will be
interesting for everyone.

I aim to:
* Introduce gdb.
** multi-threaded workloads.
**conditional breakpoints.
**Hooking it up to valgrind.
* Introduce ftrace
**Profile the kernel with "echo" and "cat". :-)
**Using function graphs to explore how the kernel works.
* Introduce Linux perf
**A quick primer on how PMU sampling works.
**Some basic tracing ("perf top", "perf record")
**Capturing other performance events.
**Intro to kprobes.
**Intro uprobes. [provisional]
**"perf script" to perform analysis.
* Introduce LTTNG [provisional]
**Hook it up to perf [provisional]
* The importance of debugging information
** Debugging a package with/without debugging info.
** Profiling a package with/without debugging info.

[[Category:Miniconf-UK/2014]]