large array, ia64, "segmentation fault " 2004-11-26 - By hx w
Back
I compile a source , when N=100, everything is good;
but
when i modify N=1000, i got the info: segmentation
fault. i am using icc 8.1.
My sys info:
RHEL3-64bit update 2.
2.4.21-4.EL kernel
4-way Iatnium2 .
8G RAM.
So, does any one meet the same thing as me? What cause
the error info? And how cuold i do to resolve it?
Thanks !
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#include <stdio.h >
#include <sys/time.h >
#include <stdlib.h >
#define N 1000
void Input(double A[N][N], double B[N][N]);
void MultiplyS(double A[][N], double B[][N], double
C[][N]);
int main()
{
int i,j,k;
double A[N][N],B[N][N],C[N][N];
struct timeval start_time,end_time;
double elapsed_time;
gettimeofday(&start_time,NULL);
Input(A,B);
MultiplyS(A,B,C);
gettimeofday(&end_time,NULL);
elapsed_time=1000000*(end_time.tv_sec-start_time.tv_sec)+
end_time.tv_usec-start_time.tv_usec;
elapsed_time/=1000000;
printf( "Used Time:%f seconds\n ",elapsed_time);
return 0;
}
void Input(double A[N][N],double B[N][N])
{
int i,j;
for( i=0; i <N; i++)
for( j=0; j <N; j++)
{
A[i][j] = 1;
B[i][j] = 0.8;
}
}
void MultiplyS(double A[][N], double B[][N], double
C[][N])
{
int i,j,k;
for(i=0; i <N; i++)
for( j=0; j <N; j++)
{
C[i][j] = 0;
for( k=0; k <N; k++)
C[i][j]+= (A[i][k]* B[k][j]);
}
}
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