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Current and Peak Memory consumption of my program?

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Old 06-06-2009
Current and Peak Memory consumption of my program?
Hi,

my C++ program does some memory consuming tasks and runs several minutes.
During execution time, I want to print information on the current memory consumption and peak memory consumption of my program into a logfile.
How can I retrieve this information, i.e. which functions are available to get memory and peak memory of my program?
I don't want to call any commands like "ps" etc. via system(), but would like to use functions supported by AIX and implement them in my C++ coding.

Thanks!
Last edited by jim mcnamara; 06-06-2009 at 06:25 AM.. Reason: duplicate post
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LEARN ABOUT ULTRIX

vlimit

vlimit(3)						     Library Functions Manual							 vlimit(3)

Name
       vlimit - control maximum system resource consumption

Syntax
       #include <sys/vlimit.h>

       vlimit(resource, value)

Description
       This facility has been superseded by

       Limits  the  consumption by the current process and each process it creates to not individually exceed value on the specified resource.	If
       value is specified as -1, then the current limit is returned and the limit is unchanged.  The resources which  are  currently  controllable
       are:

       LIM_NORAISE    Pseudo-limit; if set nonzero then the limits may not be raised.  Only the super-user may remove the noraise restriction.

       LIM_CPU	      The maximum number of cpu-seconds to be used by each process.

       LIM_FSIZE      The largest single file which can be created.

       LIM_DATA       The maximum growth of the data+stack region via beyond the end of the program text.

       LIM_STACK      The maximum size of the automatically-extended stack region.

       LIM_CORE       the size of the largest core dump that will be created.

       LIM_MAXRSS     a  soft  limit for the amount of physical memory (in bytes) to be given to the program.  If memory is tight, the system will
		      prefer to take memory from processes which are exceeding their declared LIM_MAXRSS.

       Because this information is stored in the per-process information this system call must be executed directly by	the  shell  if	it  is	to
       affect all future processes created by the shell; limit is thus a built-in command to

       The  system  refuses to extend the data or stack space when the limits would be exceeded in the normal way.  A break call fails if the data
       space limit is reached, or the process is killed when the stack limit is reached.  Since the stack cannot be extended, there is no  way	to
       send a signal.

       A file I/O operation which would create a file which is too large will cause a signal SIGXFSZ to be generated, this normally terminates the
       process, but may be caught.  When the cpu time limit is exceeded, a signal SIGXCPU is sent to the offending process; to allow  it  time	to
       process the signal it is given 5 seconds grace by raising the cpu time limit.

Restrictions
       If LIM_NORAISE is set, then no grace should be given when the CPU time limit is exceeded.

See Also
       csh(1)

																	 vlimit(3)