I work on performance profiling of an application app that was compiled with IBM XL Fortran compiler for IBM POWER8 processor. This is a part of the output of perf report:
3.88% app app [.] __xl_pow
2.91% app app [.] __xl_log
1.81% app app [.] __xl_exp
What are these functions shown in the profile? My hypothesis is that these are the implementations of pow(), log() and exp() that are supplied with the compiler (see a similar discussion). Is that correct?