prof(M)

prof -- profile within a function

Syntax

#define MARK
#include <prof.h>

void MARK (name)

Description

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

name may be any valid C identifier. 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. This may be defined by a preprocessor directive as in the synopsis or by a command line argument, that is:

cc -p -DMARK foo.c

If MARK is not defined, the MARK(name) statements may be left in the source files containing them and will be ignored.

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

prof(M)

Syntax

Description

Examples

See also