PROF(7) Standards, Environments, and Macros PROF(7)

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 prof.h is included, either by a preprocessor directive as in
the synopsis, or by a command line argument:


cc -p -DMARK work.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.

EXAMPLES

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>
work( )
{
int i, j;
...
MARK(loop1);
for (i = 0; i < 2000; i++) {
...
}
MARK(loop2);
for (j = 0; j < 2000; j++) {
...
}
}

SEE ALSO

profil(2), monitor(3C)

July 3, 1990 PROF(7)