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Debugging and profiling: Difference between revisions
→GNU Profiler (gprof)
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==== Compile your code ==== | ==== Compile your code ==== | ||
To get useful information from [https://sourceware.org/binutils/docs/gprof/ Gprof] , you first need to compile your code with debugging information enabled. With the GNU compilers, you do so by adding a "-pg" option on compilation. This option tells the compiler to generate extra code to write profile information suitable for the analysis. If it is not in your compiler options no call-graph data will be gathered and if you run gprof hopping to get the profiling you may get the following error: | To get useful information from [https://sourceware.org/binutils/docs/gprof/ Gprof] , you first need to compile your code with debugging information enabled. With the GNU compilers, you do so by adding a "-pg" option on compilation. This option tells the compiler to generate extra code to write profile information suitable for the analysis. If it is not in your compiler options no call-graph data will be gathered and if you run gprof hopping to get the profiling you may get the following error: | ||
<pre> | |||
gprof: gmon.out file is missing call-graph data | |||
</pre> | |||
==== Execute your code ==== | ==== Execute your code ==== | ||