Anna Sidera wrote:
>
> ----- Original Message -----
> From: Andrew Haley <aph@xxxxxxxxxx>
> Date: Friday, January 2, 2009 11:50 am
> Subject: Re: Is there heap size limitaion?
>
>> Anna Sidera wrote:
>>> From: Andrew Haley <aph@xxxxxxxxxx>
>>>> Anna Sidera wrote:
>>>>> ----- -----
>>>>> From: Andrew Haley <aph@xxxxxxxxxx>
>>>>>> Anna Sidera wrote:
>>>>>>> Can you tell me if there is heap size limitation in gcc? I
>> use
>>>> a
>>>>>> server with 4 CPU and 16 BG ram. I create tables using malloc
>>>> and
>>>>>> the total memory I can use is a little less than 4 GB.
>>>>>>
>>>>>> Seems odd. What OS / architecture are you using?
>>>>> I am using unix. SunOS 5.10
>>>> OK, but what architecture? 32-bit or 64-bit mode?
>>>>
>>>> Type
>>>>
>>>> isainfo -v
>>>>
>>>> If it's 32-bit then you will be limited, obviously.
>>>> If gcc is generating 32-bit executables then you will also be
>>>> limited. The -m64/-m32 options control this.
>>> isainfo -v gives the following output:
>>>
>>> 64-bit sparcv9 applications
>>> vis2 vis
>>> 32-bit sparc applications
>>> vis2 vis v8plus div32 mul32
>> So, did compiling with -m64 fix it?
>>
>> Andrew.
>>
>>
> -m64 did not work. For the following program if I use -m32 the fist printf statement works but before the second one I get core dump. If I use -m64 I get core dump before the first printf.
>
> #include <stdio.h>
> #include <math.h>
> #include <stdlib.h>
> #include <time.h>
> int main()
> {
>
> int i, j;
>
> int **table1=malloc(10000000*sizeof(int));
^ This is wrong. Should be
int **table1=malloc(10000000*sizeof(int**));
The same error occurs several times.
You also need
if (!table1 || !table1_aux)
perror ("");
> int *table1_aux=(int *)malloc(10000000*100*sizeof(int));
> for (i=0; i<10000000; i++) table1[i]=table1_aux+i*100;
> for (i=0; i<10000000; i++) {
> for (j=0; j<100; j++) {
> table1[i][j]=0;
> }
> }
> printf("table1 ok\n");
>
> int **table2=malloc(10000000*sizeof(int));
> int *table2_aux=(int *)malloc(10000000*100*sizeof(int));
> for (i=0; i<10000000; i++) table2[i]=table2_aux+i*100;
> for (i=0; i<10000000; i++) {
> for (j=0; j<100; j++) {
> table2[i][j]=0;
> }
> }
> printf("table2 ok\n");
>
> return 0;
> }
>
> Anna
>
