prof(5) File Formats Manual prof(5)
Name
prof - profile within a function
Syntax
#define MARK
#include <prof.h>
void MARK (name)
Description
The symbol produces a mark called name that is treated the same as a function entry point. Execution of the mark increments the counter
for that mark, and the program-counter time spent is accounted to the preceding mark or to the function if a preceding mark is not within
the active function.
The name argument can be any combination of numbers or underscores. Each name in a single compilation must be unique, but can be the same
as any ordinary program symbol.
For marks to be effective, the symbol must be defined before the header file is included. This may be defined by a preprocessor directive
as in the synopsis, or by a command line argument. For example:
cc -p -DMARK foo.c
If is not defined, the statements may remain in the source files, but they will be ignored.
Examples
In the following example, marks are used to determine how much time is spent in each loop. Unless the example is compiled with 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)
RISC prof(5)
