Difference between revisions of "Speedprof"

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* doesn't work well with old systems (pre TLS / NPTL)
 
* 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.
 
* doesn't like very long C++ symbols much - makes the columns somewhat unpleasant to use, needs some app tweakage.
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[[Category:Developer_Tools]]
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[[Category:Performance]]

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

install it

   ./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.

downsides

  • 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.
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