Date: Thu, 11 May 2000 03:45:06 +0000 From: Gustavo Vieira Goncalves Coelho Rios <kernel@tdnet.com.br> To: freebsd-questions@freebsd.org Subject: small program is eating my memory. Message-ID: <391A2CC2.383E1BCE@tdnet.com.br>
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While playing a little bit with C, i realized that even small C programs
eat too much memory.
May you, kindly, explaim me what is happenning? How can i optimize it?
I think here is eating too much memory.
a.c listing....
#include <stdio.h>
#include <unistd.h>
#include <string.h>
enum { T_SLICE = 10000 };
int
main(int argc, char *argv[])
{
unsigned int c;
unsigned int d;
unsigned int v;
if (!*++argv) {
printf("usage: %s <1/100 seconds>\n", *--argv);
fflush(stdout);
return 1;
}
v = atoi(*argv);
c = 0x7c2f2d5c;
d = 0x7c5c2d2f;
printf("Useless program (by grios): ...%c", c);
fclose(stdin);
fclose(stderr);
for (;;) {
c = c << 8 | c >> 24;
printf("\b%c", c);
fflush(stdout);
usleep(v * T_SLICE);
}
return 0;
}
---end listing a.c
How did i compiled: cc -ansi -pedantic -Wall -s a.c
after running it, here is what i got:
$ ps aux | grep a.out
grios 90285 0.0 0.4 816 448 p1 SN+ 3:42AM 0:00.16 ./a.out 1
It resident size is about 816K and is resident around 448!
Why such a small program eats so much memory?
Thank you for your time and cooperation.
--
"Sometimes I worry about being a success in a mediocre world."
-- Lily Tomlin
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