(unknown)

(unknown)

[Ankit Jain]

hi

well i am fixed up in a new problem

i am using a array of size 1024*1024

it gives segmentation fault

it works with 512*512

my menory size is 128 mb and 512 swap

i have enough memory space and using gcc 3.2 v

may be i need to increase the memory size

how to do that?

ankit

________________________________________________________________________
Yahoo! Messenger - Communicate instantly..."Ping" 
your friends today! Download Messenger Now 
http://uk.messenger.yahoo.com/download/index.html

Re:

[Ron Michael Khu]

did u try allocating it the dynamic way??
via a call to malloc or in a similar fashion?

Ankit Jain wrote:

>hi
>
>well i am fixed up in a new problem
>
>i am using a array of size 1024*1024
>
>it gives segmentation fault
>
>it works with 512*512
>
>my menory size is 128 mb and 512 swap
>
>i have enough memory space and using gcc 3.2 v
>
>may be i need to increase the memory size
>
>how to do that?
>
>ankit
>
>________________________________________________________________________
>Yahoo! Messenger - Communicate instantly..."Ping" 
>your friends today! Download Messenger Now 
>http://uk.messenger.yahoo.com/download/index.html
>-
>To unsubscribe from this list: send the line "unsubscribe linux-c-programming" in
>the body of a message to majordomo@vger.kernel.org
>More majordomo info at  http://vger.kernel.org/majordomo-info.html
>
>
>  
>

re: memory problem

[Ron Michael Khu]

what method did u use to allocate memory??

static:
 char array[1024*1024] ;

dynamic
 char *array = (char*)calloc(  1024*1024, sizeof(char) );

and why r u allocating such huge chunks for an array?



Ankit Jain wrote:

>hi
>
>well i am fixed up in a new problem
>
>i am using a array of size 1024*1024
>
>it gives segmentation fault
>
>it works with 512*512
>
>my menory size is 128 mb and 512 swap
>
>i have enough memory space and using gcc 3.2 v
>
>may be i need to increase the memory size
>
>how to do that?
>
>ankit
>
>________________________________________________________________________
>Yahoo! Messenger - Communicate instantly..."Ping" 
>your friends today! Download Messenger Now 
>http://uk.messenger.yahoo.com/download/index.html
>-
>To unsubscribe from this list: send the line "unsubscribe linux-c-programming" in
>the body of a message to majordomo@vger.kernel.org
>More majordomo info at  http://vger.kernel.org/majordomo-info.html
>
>
>  
>

Re:

[Ron Michael Khu]

here 's an example of static and dynamic allocation...
(my prev example was only about single dimensional arrays...)

a 2dimensional array of  4450 x 4450
(change the dimension to 1450 x 1450 if  u find the
first size to be too big)

TEST.C
#include <stdio.h>
int main()
{
  double a[4450][4450];

  a[4449][0] = 999;
  printf( "%lf\n", a[4449][0] );
  return 1;
}


TEST2.c
#include <stdio.h>
int main()
{
  double **a;
  int i;

  a = (double**) calloc( 4450, sizeof(double*) );
  for ( i=0; i <1450; i++ )
  {
    a[i] = (double*) calloc( 4450, sizeof(double) );
  }

  a[4449][0]=999;
  printf( "%lf\n", a[4449][0] );
  return 1;
}




Ankit Jain wrote:

>hi
>
>well i am fixed up in a new problem
>
>i am using a array of size 1024*1024
>
>it gives segmentation fault
>
>it works with 512*512
>
>my menory size is 128 mb and 512 swap
>
>i have enough memory space and using gcc 3.2 v
>
>may be i need to increase the memory size
>
>how to do that?
>
>ankit
>
>________________________________________________________________________
>Yahoo! Messenger - Communicate instantly..."Ping" 
>your friends today! Download Messenger Now 
>http://uk.messenger.yahoo.com/download/index.html
>-
>To unsubscribe from this list: send the line "unsubscribe linux-c-programming" in
>the body of a message to majordomo@vger.kernel.org
>More majordomo info at  http://vger.kernel.org/majordomo-info.html
>
>
>  
>

(unknown),

[postmaster]