отображать данные профиля графика звонков (display call graph profile data)
Описание (Description)
"gprof" produces an execution profile of C, Pascal, or Fortran77
programs. The effect of called routines is incorporated in the
profile of each caller. The profile data is taken from the call
graph profile file (gmon.out default) which is created by
programs that are compiled with the -pg option of "cc", "pc", and
"f77". The -pg option also links in versions of the library
routines that are compiled for profiling. "Gprof" reads the
given object file (the default is "a.out") and establishes the
relation between its symbol table and the call graph profile from
gmon.out. If more than one profile file is specified, the
"gprof" output shows the sum of the profile information in the
given profile files.
"Gprof" calculates the amount of time spent in each routine.
Next, these times are propagated along the edges of the call
graph. Cycles are discovered, and calls into a cycle are made to
share the time of the cycle.
Several forms of output are available from the analysis.
The flat profile shows how much time your program spent in each
function, and how many times that function was called. If you
simply want to know which functions burn most of the cycles, it
is stated concisely here.
The call graph shows, for each function, which functions called
it, which other functions it called, and how many times. There
is also an estimate of how much time was spent in the subroutines
of each function. This can suggest places where you might try to
eliminate function calls that use a lot of time.
The annotated source listing is a copy of the program's source
code, labeled with the number of times each line of the program
was executed.
