PROF(5-SVR4)        RISC/os Reference Manual         PROF(5-SVR4)



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 func-
     tion if there are no preceding marks within the active func-
     tion.

     name may be any combination of letters, numbers, or under-
     scores.  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++) {
                    . . .
               }
          }



                        Printed 11/19/92                   Page 1

PROF(5-SVR4)        RISC/os Reference Manual         PROF(5-SVR4)



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





















































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