lkml.org 
[lkml]   [2002]   [Feb]   [18]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [TEST] page tables filling non-highmem
Okay, I hereby place this testcase under the GPL:

/*
* death.c -- Testcase for pagetable memory management.
*
* Copyright (C) 2002 William Irwin
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/

#define __USE_LARGEFILE64
#include <stdio.h>
#include <unistd.h>
#include <sys/mman.h>
#include <sys/stat.h>
#include <sys/types.h>
#define __USE_LARGEFILE64
#include <fcntl.h>
#include <errno.h>

#define MAPPING_START 0x20000000
#define MAPPING_SIZE (0x80000000/sizeof(unsigned long))
#define MAPPING_END (MAPPING_START + MAPPING_SIZE*sizeof(unsigned long))

int main(void)
{
int fd;
unsigned long *data = NULL;
unsigned long try = 64;
unsigned long k = 0;

fd = open("/home/wli/bench/mapfile", O_RDWR|O_LARGEFILE);

if (fd < 0) {
perror("death");
printf("could not open mapfile!\n");
exit(1);
}

data = mmap((void *)MAPPING_START,
MAPPING_SIZE,
PROT_READ|PROT_WRITE,
MAP_FIXED | MAP_SHARED,
fd,
0);

if (!try || data == MAP_FAILED) {
printf("mmap() failed, tries = %lu!\n", 64 - try + 1);
exit(1);
}

printf("managed to mmap() at %p\n", (void *)data);

sleep(60);

try = 0;
while (1) {
printf("entered iteration %lu\n", k);
data[k++] = try++;
k %= MAPPING_SIZE;
if (k >= MAPPING_SIZE-1)
k = 0;
}
return 0;
}
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2005-03-22 13:24    [W:0.140 / U:17.640 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site