X-Authentication-Warning:	delorie.com: mailnull set sender to djgpp-bounces using -f
From:	"Jeffrey Powell" <j-powell AT pb DOT jp DOT nec DOT com>
To:	<djgpp AT delorie DOT com>
Subject:	RE: Max array size
Date:	Thu, 6 Dec 2001 14:42:18 +0900
Message-Id:	<000601c17e18$c6412ec0$1002a8c0@ygtynecs01097>
MIME-Version:	1.0
X-Priority:	3 (Normal)
X-MSMail-Priority:	Normal
X-Mailer:	Microsoft Outlook CWS, Build 9.0.2416 (9.0.2910.0)
In-Reply-To:	<9ump4d$186$1@news.iastate.edu>
X-MimeOLE:	Produced By Microsoft MimeOLE V6.00.2600.0000
Importance:	Normal
Reply-To:	djgpp AT delorie DOT com
Errors-To:	nobody AT delorie DOT com
X-Mailing-List:	djgpp AT delorie DOT com
X-Unsubscribes-To:	listserv AT delorie DOT com

Try this to see what your dpmi stats are.
This is the output from my Win2K LapTop. It show that there should be enough
memory.
Array size = 640000
largest_available_free_block_in_bytes     = 15728640
maximum_unlocked_page_allocation_in_pages = 3840
maximum_locked_page_allocation_in_pages   = 2913
linear_address_space_size_in_pages        = 524256
total_number_of_unlocked_pages            = 2920
total_number_of_free_pages                = 22902
total_number_of_physical_pages            = 49020
free_linear_address_space_in_pages        = 515387
size_of_paging_file_partition_in_pages    = 117495

#include <stdio.h>

#include <dpmi.h>

/*
typedef struct {
  unsigned long largest_available_free_block_in_bytes;
  unsigned long maximum_unlocked_page_allocation_in_pages;
  unsigned long maximum_locked_page_allocation_in_pages;
  unsigned long linear_address_space_size_in_pages;
  unsigned long total_number_of_unlocked_pages;
  unsigned long total_number_of_free_pages;
  unsigned long total_number_of_physical_pages;
  unsigned long free_linear_address_space_in_pages;
  unsigned long size_of_paging_file_partition_in_pages;
  unsigned long reserved[3];
} __dpmi_free_mem_info;

int __dpmi_get_free_memory_information(__dpmi_free_mem_info *_info);

*/

float	MyArray[10000][16];

main(void)
{
	__dpmi_free_mem_info *_info;

	printf("Array size = %lu\n",sizeof(MyArray));
	MyArray[9999][15]=4.43;

	__dpmi_get_free_memory_information( _info );
	printf("largest_available_free_block_in_bytes     = %lu\n",
_info->largest_available_free_block_in_bytes	 );
	printf("maximum_unlocked_page_allocation_in_pages = %lu\n",
_info->maximum_unlocked_page_allocation_in_pages );
	printf("maximum_locked_page_allocation_in_pages   = %lu\n",
_info->maximum_locked_page_allocation_in_pages	 );
	printf("linear_address_space_size_in_pages        = %lu\n",
_info->linear_address_space_size_in_pages		 );
	printf("total_number_of_unlocked_pages            = %lu\n",
_info->total_number_of_unlocked_pages			 );
	printf("total_number_of_free_pages                = %lu\n",
_info->total_number_of_free_pages				 );
	printf("total_number_of_physical_pages            = %lu\n",
_info->total_number_of_physical_pages			 );
	printf("free_linear_address_space_in_pages        = %lu\n",
_info->free_linear_address_space_in_pages		 );
	printf("size_of_paging_file_partition_in_pages    = %lu\n",
_info->size_of_paging_file_partition_in_pages    );


	return 0;
}

Jeff Powell
NEC CustomTechnica

-----Original Message-----
From: Tom Kent [mailto:tomkent AT iastate DOT edu]
Sent: Thursday, December 06, 2001 12:38 PM
To: djgpp AT delorie DOT com
Subject: Max array size

I was wondering if there was any maximum array size is.  I've been trying to
compile a program that has an array of floats with dimensions 10,000x16.  It
compiles fine, but then when i go to run it I get an error.  However it
compiles and runs fine under the gcc compiler on a unix machine I use.
Because of this I was hypothesizing a potential limitation either with this
compiler or with DOS.  I'm running it in cmd.exe under windows XP on a dual
1.7GHz Xeon machine with 512MB RAM.  Thanks in advance.
Tom Kent

- Raw text -