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Re: Optimising A = B+C? [message #6338 is a reply to message #6257]

Tue, 04 June 1996 00:00

davis
Messages: 15
Registered: March 1995

Junior Member

On 3 Jun 1996 22:05:03 GMT, John E. Davis <davis@space.mit.edu>
wrote:
: Here is the file t.c:
[...]
: int main (int argc, char **argv)
: {
: unsigned int dim = MAX_SIZE * MAX_SIZE;
: unsigned int i;
: float a[MAX_SIZE+EXTRA][MAX_SIZE+EXTRA], b[MAX_SIZE+EXTRA][MAX_SIZE+EXTRA];

On some systems it is necessary to make `a' and `b' global variables because
as declared, they use up about 2*4*1024*1024 = 8 Mbytes of stack space.
This will cause the program to core dump if not enough stack space is
available. The change will look like:

float a[MAX_SIZE+EXTRA][MAX_SIZE+EXTRA], b[MAX_SIZE+EXTRA][MAX_SIZE+EXTRA];
int main (int argc, char **argv)
{
unsigned int dim = MAX_SIZE * MAX_SIZE;
unsigned int i;

--
John E. Davis Center for Space Research/AXAF Science Center
617-258-8119 MIT 37-662c, Cambridge, MA 02139
http://space.mit.edu/~davis

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[Message index]

		Optimising A = B+C? By: kgb on Fri, 31 May 1996 00:00
		Re: Optimising A = B+C? By: davis on Tue, 04 June 1996 00:00
		Re: Optimising A = B+C? By: davis on Mon, 03 June 1996 00:00
		Re: Optimising A = B+C? By: davis on Sun, 02 June 1996 00:00

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