Date:	Sat, 14 May 1994 21:27:59 -0400
From:	meetze AT charlie DOT ece DOT scarolina DOT edu (Murle C. Meetze III)
To:	djgpp AT sun DOT soe DOT clarkson DOT edu
Subject:	Disk Paging question and Windows Dos Box

I am just wondering I know that gcc compiled programs can page to disk,
but I have just one question.  I was testing this on my 486SLC2 66MHz,
using a dos box in windows (ver. 3.1) and by just using dos (ver. 5.0)
and was wondering why that by running it under windows in a dos box it
takes so long to run, and makes such a big page file where under dos it is
fast and doesn't make a huge page file.
 
My computer stats: 486SLC2 66MHz, 4 MEG RAM, 85 MEG HD
 
-------------------------(memtest.c)----------------------------
 
#include       <stdio.h>
#include       <stdlib.h>
#include       <time.h>
#define        MEMSIZE        1024*1024
 
void main(void) {
clock_t start = clock();
char *p = NULL;
p = (char *) malloc(MEMSIZE);
if(p == NULL) {
     printf("unable to alloc %ld bytes of memory\n",MEMSIZE);
     printf("[%ld] msecs.\n",(clock() - start)/1000);
     exit(1);
}
system("dir C:\\djgpp\\tmp");
system("mem");
printf("alloced %ld bytes of memory\n",MEMSIZE);
free(p);
system("dir C:\\djgpp\\tmp");
system("mem");
printf("freed %ld bytes of memory\n",MEMSIZE);
printf("[%ld] msecs.\n",(clock() - start)/1000);
exit(0);
}
----------------------------------------------------------------
 
 
---------------(output of memtest.c using dos)------------------
 
 Volume in drive C is MICROBYTE  
 Volume Serial Number is 18EC-180E
 Directory of C:\DJGPP\TMP
 
.            <DIR>     02-10-94  12:14a
..           <DIR>     02-10-94  12:14a
PG0506AA AAA     45056 05-14-94   4:38p
        3 file(s)      45056 bytes
                    14063616 bytes free
 
 
    655360 bytes total conventional memory
    655360 bytes available to MS-DOS
    504320 largest executable program size
 
   3276800 bytes total contiguous extended memory
         0 bytes available contiguous extended memory
   1957888 bytes available XMS memory
           MS-DOS resident in High Memory Area
alloced 1048576 bytes of memory
 
 Volume in drive C is MICROBYTE  
 Volume Serial Number is 18EC-180E
 Directory of C:\DJGPP\TMP
 
.            <DIR>     02-10-94  12:14a
..           <DIR>     02-10-94  12:14a
PG0506AA AAA     49152 05-14-94   4:38p
        3 file(s)      49152 bytes
                    14059520 bytes free
 
 
    655360 bytes total conventional memory
    655360 bytes available to MS-DOS
    504320 largest executable program size
 
   3276800 bytes total contiguous extended memory
         0 bytes available contiguous extended memory
   1957888 bytes available XMS memory
           MS-DOS resident in High Memory Area
freed 1048576 bytes of memory
[439] msecs.
----------------------------------------------------------------
 
-------(output of memtest.c using dos box in windows)-----------
 Volume in drive C is MICROBYTE  
 Volume Serial Number is 18EC-180E
 Directory of C:\DJGPP\TMP
 
.            <DIR>     02-10-94  12:14a
..           <DIR>     02-10-94  12:14a
PG083FAA AAA   1134592 05-14-94   4:39p
        3 file(s)    1134592 bytes
                    12972032 bytes free
 
 
    655360 bytes total conventional memory
    655360 bytes available to MS-DOS
    490464 largest executable program size
 
   3276800 bytes total contiguous extended memory
         0 bytes available contiguous extended memory
   1048576 bytes available XMS memory
           MS-DOS resident in High Memory Area
alloced 1048576 bytes of memory
 
 Volume in drive C is MICROBYTE  
 Volume Serial Number is 18EC-180E
 Directory of C:\DJGPP\TMP
 
.            <DIR>     02-10-94  12:14a
..           <DIR>     02-10-94  12:14a
PG083FAA AAA   1142784 05-14-94   4:40p
        3 file(s)    1142784 bytes
                    12963840 bytes free
 
 
    655360 bytes total conventional memory
    655360 bytes available to MS-DOS
    490464 largest executable program size
 
   3276800 bytes total contiguous extended memory
         0 bytes available contiguous extended memory
   1048576 bytes available XMS memory
           MS-DOS resident in High Memory Area
freed 1048576 bytes of memory
[41417] msecs.
----------------------------------------------------------------

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