Difference between revisions of "Speedprof"
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Latest revision as of 02:13, 30 April 2008
what is it
Speedprof is an LD_PRELOAD based itimer (or hard real-time, or builtin CPU timer) based snapshot profiler. It samples at regular intervals (tweakable by reading the code ;-) and then presents a rather sexy data mining view so you can wind back full stack information - what function called what and when, self & cumulative times down trace paths etc.
how to get it
Checkout 'memprof' from GNOME SVN:
svn co http://svn.gnome.org/svn/memprof/branches/sled-fixes/ memprof
./autogen.sh make sudo make install
how to use it
speedprof ./soffice.bin -writer
Of course, the most useful mode is to use the 'reset' button - ie. get OO.o going to the state you're interested in. Hit reset - do something slow - hit 'Profile' and wander the trace.
- sometimes crashes the app - but hey, sometimes the app crashes under it's own steam too - hard to know whom to blame.
- doesn't work well with old systems (pre TLS / NPTL)
- doesn't like very long C++ symbols much - makes the columns somewhat unpleasant to use, needs some app tweakage.