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#include "pagingtest.h"
#include <errno.h>
#include <fcntl.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include <sys/mman.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <unistd.h>
#define TEST_RUNS 10
#define ALLOC_SIZE (10 * 1024 * 1024)
#define FILE_SIZE (10 * 1024 * 1024)
int create_tmp_file(char *filename, off_t size) {
void *buf;
uint8_t *tmp_buf;
off_t tmp_size;
ssize_t rc;
int fd;
int urandom;
fd = mkstemp(filename);
if (fd < 0) {
fprintf(stderr, "unable to create temp file: %s\n", strerror(errno));
goto err_mkstemp;
}
urandom = open("/dev/urandom", O_RDONLY);
if (urandom < 0) {
fprintf(stderr, "unable to open urandom: %s\n", strerror(errno));
goto err_open;
}
if (unlink(filename)) {
fprintf(stderr, "unable to unlink temp file: %s\n", strerror(errno));
goto err_unlink;
}
if (ftruncate(fd, size)) {
fprintf(stderr, "unable to allocate temp file: %s\n", strerror(errno));
goto err_truncate;
}
buf = mmap(NULL, size, PROT_WRITE, MAP_SHARED, fd, 0);
if (buf == (void *)-1) {
fprintf(stderr, "unable to mmap temp file: %s\n", strerror(errno));
goto err_mmap;
}
tmp_buf = buf;
tmp_size = size;
do {
rc = read(urandom, tmp_buf, tmp_size);
if (rc < 0) {
fprintf(stderr, "write random data failed: %s\n", strerror(errno));
goto err;
}
tmp_buf += rc;
tmp_size -= rc;
} while (tmp_size > 0);
if (madvise(buf, size, MADV_DONTNEED)) {
fprintf(stderr, "madvise DONTNEED failed: %s\n", strerror(errno));
goto err;
}
if (fsync(fd) < 0) {
fprintf(stderr, "fsync failed: %s\n", strerror(errno));
goto err;
}
rc = posix_fadvise(fd, 0, size, POSIX_FADV_DONTNEED);
if (rc) {
fprintf(stderr, "fadvise DONTNEED failed: %s\n", strerror(errno));
goto err;
}
munmap(buf, size);
close(urandom);
return fd;
err:
munmap(buf, size);
err_mmap:
err_truncate:
err_unlink:
close(urandom);
err_open:
close(fd);
err_mkstemp:
return -1;
}
unsigned char *alloc_mincore_vec(size_t size) {
unsigned char *vec;
vec = malloc(mincore_vec_len(size));
if (vec == NULL) {
fprintf(stderr, "malloc failed\n");
}
return vec;
}
bool check_caching(void *buf, unsigned char *vec, size_t size, bool is_cached) {
bool ret = true;
size_t i;
if (mincore(buf, size, vec)) {
fprintf(stderr, "mincore failed: %s\n", strerror(errno));
return false;
}
if (is_cached) {
for (i = 0; i < mincore_vec_len(size); i++) {
if (!(vec[i] & 0x1)) {
fprintf(stderr, "found an uncached page at page offset %zd\n", i);
ret = false;
}
}
} else {
for (i = 0; i < mincore_vec_len(size); i++) {
if (vec[i] & 0x1) {
fprintf(stderr, "found a cached page at page offset %zd\n", i);
ret = false;
}
}
}
return ret;
}
int main(int argc, char **argv) {
unsigned long long alloc_size = 0ULL;
unsigned long long file_size = 0ULL;
int test_runs = 0;
int rc;
//arguments: <program> [test_runs [alloc_size [file_size]]]
if (argc >= 2) {
test_runs = atoi(argv[1]);
}
if (test_runs <= 0) {
test_runs = TEST_RUNS;
}
if (argc >= 3) {
alloc_size = strtoull(argv[2], NULL, 10);
}
if (!alloc_size) {
alloc_size = ALLOC_SIZE;
}
if (argc >= 4) {
file_size = strtoull(argv[3], NULL, 10);
}
if (!file_size) {
file_size = FILE_SIZE;
}
rc = mmap_test(test_runs, alloc_size);
if (rc) {
return rc;
}
rc = pageinout_test(test_runs, true, file_size);
if (rc) {
return rc;
}
rc = pageinout_test(test_runs, false, file_size);
if (rc) {
return rc;
}
rc = thrashing_test(test_runs, true);
if (rc) {
return rc;
}
rc = thrashing_test(test_runs, false);
return rc;
}
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