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From: ric@ace.sri.com (Richard Steinberger)
Newsgroups: comp.unix.questions,comp.lang.c
Subject: Finding/changing max memory size available
Message-ID: <24817@unix.SRI.COM>
Date: 28 May 91 15:41:43 GMT
Sender: news@unix.SRI.COM
Reply-To: ric@ace.sri.com (Richard Steinberger)
Followup-To: comp.unix.questions
Organization: SRI International
Lines: 32

The following short program finds the maximum amount of memory that can be
allocated through use of malloc().  What I'd like to know is, "Where/How
is this limit set?  Is this a a function of 1 or more kernel parameters,
or other system configuration variables?"  Can the upper allocatable memory
limit be changed (without adding physical memory, of course)?  Thanks for
any replies.

regards,

	ric steinberger
	ric@ace.sri.com

/****************************************************************************/

#include <stdio.h>
#include <stdlib.h>

#define MALLOC_SIZE 1000000L        /* Number of bytes to allocate / call */

main()
{
  char *cptr;
  long i;

  while ((cptr = malloc(MALLOC_SIZE)) != NULL)
    i++;

  printf("Total memory allocated = %u bytes.\n", i*MALLOC_SIZE);
  exit(0);
}

/****************************************************************************/