[Valgrind-developers] CPU cycles information in Callgrind

[David F. L. <d.f...@gm...>]

Hello everyone,

I'm trying to profile my code using callgrind. I use this command:

valgrind --dsymutil=yes --tool=callgrind --trace-children=yes
 --separate-threads=yes --instr-atstart=no --collect-atstart=no
--collect-systime=yes <my_program>

The results show a lot of functions with 0 CPU cycles, but these functions
are called a lot of times.

For example:

fn=(13976) aes_icm_encrypt
cfn=(13978) aes_icm_encrypt_ismacryp
calls=2883 0
0 0 1 13

But, the output gives correct information about functions in the same
library. Theses functions have a high overhead  and they are the bottleneck
of my application.

Do you have any clue why I don't have CPU cycles information about these
functions?

Thanks in advance.
Regards.

-- 
David Fernández López