prof(5)                          DG/UX 5.4.2                         prof(5)


NAME
       prof - profile within a function

SYNOPSIS
       #define MARK
       #include <prof.h>

       void MARK (name);

DESCRIPTION
       MARK introduces a mark called name that is treated the same as a
       function entry point.  Execution of the mark adds to a counter for
       that mark, and program-counter time spent is accounted to the
       immediately preceding mark or to the function if there are no
       preceding marks within the active function.

       name may be any combination of letters, numbers, or underscores.
       Each name in a single compilation must be unique, but may be the same
       as any ordinary program symbol.

       For marks to be effective, the symbol MARK must be defined before the
       header file prof.h is included, either by a preprocessor directive as
       in the synopsis, or by a command line argument:

              cc -p -DMARK foo.c

       If MARK is not defined, the MARK(name) statements may be left in the
       source files containing them and are ignored.  prof -g must be used
       to get information on all labels.

EXAMPLE
       In this example, marks can be used to determine how much time is
       spent in each loop.  Unless this example is compiled with MARK
       defined on the command line, the marks are ignored.

              #include <prof.h>
              foo( )
              {
                   int i, j;
                   . . .
                   MARK(loop1);
                   for (i = 0; i < 2000; i++) {
                        . . .
                   }
                   MARK(loop2);
                   for (j = 0; j < 2000; j++) {
                        . . .
                   }
              }

SEE ALSO
       prof(1), profil(2), monitor(3C).





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