12-11-2005
Sorry, didn't realize that school related stuff was against policy. For the record, my Prof. is cool with us asking for help outside of the classroom. He's even puzzled as to what to do for the situation. But I do understand, while my prof may be alright with it, others may not, and thus I would be setting an example...
I'm not trying to have someone else "do my homework", I just wanted a pointer as to which direction to go for this particular issue. I've already completed the program, just some slight troubleshooting.
I'll look into the solution. Thanks for the help.
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LEARN ABOUT BSD
monstartup
MONITOR(3) Library Functions Manual MONITOR(3)
NAME
monitor, monstartup, moncontrol - prepare execution profile
SYNOPSIS
monitor(lowpc, highpc, buffer, bufsize, nfunc)
int (*lowpc)(), (*highpc)();
short buffer[];
monstartup(lowpc, highpc)
int (*lowpc)(), (*highpc)();
moncontrol(mode)
DESCRIPTION
There are two different forms of monitoring available: An executable program created by:
cc -p . . .
automatically includes calls for the prof(1) monitor and includes an initial call to its start-up routine monstartup with default parame-
ters; monitor need not be called explicitly except to gain fine control over profil buffer allocation. An executable program created by:
cc -pg . . .
automatically includes calls for the gprof(1) monitor.
Monstartup is a high level interface to profil(2). Lowpc and highpc specify the address range that is to be sampled; the lowest address
sampled is that of lowpc and the highest is just below highpc. Monstartup allocates space using sbrk(2) and passes it to monitor (see
below) to record a histogram of periodically sampled values of the program counter, and of counts of calls of certain functions, in the
buffer. Only calls of functions compiled with the profiling option -p of cc(1) are recorded.
To profile the entire program, it is sufficient to use
extern etext();
. . .
monstartup((int) 2, etext);
Etext lies just above all the program text, see end(3).
To stop execution monitoring and write the results on the file mon.out, use
monitor(0);
then prof(1) can be used to examine the results.
Moncontrol is used to selectively control profiling within a program. This works with either prof(1) or gprof(1) type profiling. When the
program starts, profiling begins. To stop the collection of histogram ticks and call counts use moncontrol(0); to resume the collection of
histogram ticks and call counts use moncontrol(1). This allows the cost of particular operations to be measured. Note that an output file
will be produced upon program exit irregardless of the state of moncontrol.
Monitor is a low level interface to profil(2). Lowpc and highpc are the addresses of two functions; buffer is the address of a (user sup-
plied) array of bufsize short integers. At most nfunc call counts can be kept. For the results to be significant, especially where there
are small, heavily used routines, it is suggested that the buffer be no more than a few times smaller than the range of locations sampled.
Monitor divides the buffer into space to record the histogram of program counter samples over the range lowpc to highpc, and space to
record call counts of functions compiled with the -p option to cc(1).
To profile the entire program, it is sufficient to use
extern etext();
. . .
monitor((int) 2, etext, buf, bufsize, nfunc);
FILES
mon.out
SEE ALSO
cc(1), prof(1), gprof(1), profil(2), sbrk(2)
4th Berkeley Distribution May 15, 1985 MONITOR(3)