Known bugs
==========
undefined symbol: glGenQueries

	The problem here is code in libfips directly calling OpenGL
	functions like glGenQueries but not linking against any OpenGL
	library.

	We don't want to link against any OpenGL library so that the
	application itself can choose which OpenGL to use (and how to
	link/load it).

	The trick is to instead make these calls indirectly by first
	calling glXGetProcAddressARB/eglGetProcAddress. There's some
	proof-of-concept code for this in the stash-egl-lookup-fixups
	branch, (which needs some cleaning up).

Feature requests (small-scale, near-term changes)
=================================================

Report CPU load per frame.

Report GPU load per frame.

Report CPU frequency per frame.

Report GPU frequency per frame.

Report shader compilation time.

Report elapsed time per frame.

Add options to control which metrics should be collected.

Add Eric's tiny hash table for collecting per-shader statistics

	people.freedesktop.org:~anholt/hash_table

Sort list of shaders in output

Use better units for shader activity (eg. absolute time, relative percentage)

Capture GPU performance counters.

Allow dumping of shader source for investigation

Infrastructure (larger-scale things, more future-looking items)
===============================================================

Use ncurses for a better top-like display.

Report timestamps and CPU time durations for operations causing
CPU/GPU syncs.

Emit per-frame data in a format for external timeline viewer.

Allow enabling/disabling of tracing at run-time

	Such as via signals, (optionally specified by env. variable)

Investigation for other potential features
==========================================

Audit Eric's recipe for performance tuning to see what else fips
should automatically collect:

	http://dri.freedesktop.org/wiki/IntelPerformanceTuning/

Audit exisiting visualization tools before writing one from scratch

	Eero suggested two possibilities:

		pytimechart
		-----------
		http://pythonhosted.org/pytimechart/index.html

		e-graph
		-------
		https://gitorious.org/e-graph

	Others?

Explore using perf/LTTng probing instead of LD_PRELOAD wrapper

	This has the advantage of allowing full-system,
	multi-process data collection.