EProf Erlang Profiling

Question

I'm attempting to profile an Erlang application using eprof. The results show that most time is spent in the dict module although the module I am most interested in profiling doesn't use dict directly, it's dependencies do which looks a bit like this:

A-- B - dict
 |- C - dict

A is the running process(a gen_server) and uses modules B and C which both use dict. How can I tell which module is using dict the most?

Answer 1

To solve similar problem I've create converter from dbg trace format to callgrind format. It helped me to use kcachegrind as a visualizer of function call hierarchy with time cost information.

https://github.com/virtan/eep

Here is an example of view helping to find where the time is spent https://raw.github.com/virtan/eep/master/doc/sshot6.png