/*
* libhugetlbfs - Easy use of Linux hugepages
* Copyright (C) 2005-2006 David Gibson & Adam Litke, IBM Corporation.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public License
* as published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <sys/types.h>
#include <sys/shm.h>
#include <sys/types.h>
#include <sys/mman.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <hugetlbfs.h>
#include "hugetests.h"
#define P "mmap-gettest"
#define DESC \
"* This baseline test validates that a mapping of a certain size *\n"\
"* can be created, correctly. Once created, all the pages are *\n"\
"* filled with a pattern and rechecked to test for corruption. *\n"\
"* The mapping is then released. This process is repeated for a *\n"\
"* specified number of iterations. *"
extern int errno;
#define BUF_SZ 256
/* Global test configuration */
#define HTLB_FILE "mmap-gettest"
static char hugetlb_mount[BUF_SZ];
static unsigned int iter;
static int nr_hugepages;
static long hpage_size;
static int do_one(char *mountpoint, size_t size) {
char *ma;
int fha;
size_t i,j;
char pattern = 'A';
fha = hugetlbfs_unlinked_fd();
if (fha < 0)
CONFIG("Unable to open temp file in hugetlbfs (%s)",
strerror(errno));
/* Map the files with MAP_PRIVATE */
ma = mmap(NULL, size, (PROT_READ|PROT_WRITE), MAP_SHARED, fha, 0);
if (ma == MAP_FAILED)
FAIL("Failed to mmap the hugetlb file: %s", strerror(errno));
/* Make sure the page is zeroed */
for (i = 0; i < nr_hugepages; i++) {
verbose_printf("Verifying %p\n", (ma+(i*hpage_size)));
for (j = 0; j < hpage_size; j++) {
if (*(ma+(i*hpage_size)+j) != 0)
FAIL("Verifying the mmap area failed. "
"Got %c, expected 0",
*(ma+(i*hpage_size)+j));
}
}
/* Fill each file with a pattern */
for (i = 0; i < nr_hugepages; i++) {
pattern = 65+(i%26);
verbose_printf("Touching %p with %c\n", ma+(i*hpage_size),pattern);
memset(ma+(i*hpage_size), pattern, hpage_size);
}
/* Verify the pattern */
for (i = 0; i < nr_hugepages; i++) {
pattern = 65+(i%26);
verbose_printf("Verifying %p\n", (ma+(i*hpage_size)));
for (j = 0; j < hpage_size; j++) {
if (*(ma+(i*hpage_size)+j) != pattern)
FAIL("Verifying the mmap area failed. "
"Got %c, expected %c",
*(ma+(i*hpage_size)+j),pattern);
}
}
/* Munmap the area */
munmap(ma, size);
/* Close and delete the file */
close(fha);
return 0;
}
int main(int argc, char ** argv)
{
size_t size;
int i;
test_init(argc, argv);
if (argc < 3)
CONFIG("Usage: %s <# iterations> <# pages>\n", argv[0]);
iter = atoi(argv[1]);
nr_hugepages = atoi(argv[2]);
hpage_size = check_hugepagesize();
size = nr_hugepages * hpage_size;
for (i=0; i < iter; i++) {
verbose_printf("Iteration %d\n", i);
do_one(hugetlb_mount, size);
}
PASS();
}