Category : OS/2 Files
Archive : EMXTST8F.ZIP
Filename : SWAPTEST.C
Output of file : SWAPTEST.C contained in archive : EMXTST8F.ZIP
#include
#include
#include
#define FALSE 0
#define TRUE 1
static int pages;
static long *count;
static char *mem;
static void usage (void)
{
fprintf (stderr, "Usage: swaptest
exit (1);
}
static void test (int i, int flag)
{
long *pm;
pm = (long *)(mem + 4096 * i);
if (count[i] == 0)
{
if (flag)
{
if (*pm != 0)
{
fprintf (stderr, "Page contents not zero\n");
exit (2);
}
pm[0] = i;
pm[1] = 1;
count[i] = 1;
}
}
else
{
if (pm[0] != i)
{
fprintf (stderr, "Pages confused\n");
exit (2);
}
if (pm[1] != count[i])
{
fprintf (stderr, "Dirty page not restored from swap file\n");
exit (2);
}
if (flag && rand () < RAND_MAX / 3)
pm[1] = ++count[i];
}
}
int main (int argc, char *argv[])
{
long l, iter, w;
char *p;
int c, i, d, u, m;
int interactive;
interactive = _isterm (fileno (stdout));
if (argc != 2)
usage ();
errno = 0;
l = strtol (argv[1], &p, 0);
if (errno != 0 || l <= 0 || l >= 0x7fff || *p != 0)
usage ();
pages = (int)l;
count = malloc (pages * sizeof (*count));
if (count == NULL)
{
fprintf (stderr, "malloc: Out of memory\n");
exit (2);
}
for (i = 0; i < pages; ++i)
count[i] = 0;
d = pages * (RAND_MAX / pages);
fprintf (stdout, "This is swaptest\n"); fflush (stdout);
fprintf (stderr, "\n"); fflush (stderr);
mem = sbrk (pages * 4096);
if ((int)mem == -1)
{
perror ("sbrk");
exit (2);
}
m = 0;
for (iter = 0; ; ++iter)
{
c = _read_kbd (0, 0, 1);
switch (c)
{
case 0x1b:
return (0);
case ' ':
u = 0; w = 0;
for (i = 0; i < pages; ++i)
{
w += count[i];
if (count[i] == m)
++u;
}
printf ("%ld iterations, count=%d for %d pages, average count=%g\n",
iter, m, u, (double)w / (double)pages);
if (u == 0)
++m;
break;
case 'b':
__asm__ ("int $3");
break;
case 't':
printf ("Testing..."); fflush (stdout);
for (i = 0; i < pages; ++i)
{
test (i, FALSE);
if (interactive && (i % 10 == 0))
{
printf ("\rTesting (%d)...", i); fflush (stdout);
}
}
if (interactive)
printf ("\rTesting...OK \n");
else
printf ("OK\n");
fflush (stdout);
break;
}
do
{
i = rand ();
} while (i >= d);
test (i % pages, TRUE);
}
return (0);
}
Very nice! Thank you for this wonderful archive. I wonder why I found it only now. Long live the BBS file archives!
This is so awesome! 😀 I’d be cool if you could download an entire archive of this at once, though.
But one thing that puzzles me is the “mtswslnkmcjklsdlsbdmMICROSOFT” string. There is an article about it here. It is definitely worth a read: http://www.os2museum.com/wp/mtswslnk/