CHECK(chdir(cwd) != -1);
}
+/* Un-mount or re-mount test file system */
+static void tests_mnt(int mnt)
+{
+ static struct mntent mount_info;
+ char *source;
+ char *target;
+ char *filesystemtype;
+ unsigned long mountflags;
+ void *data;
+ static char cwd[4096];
+
+ if (mnt == 0) {
+ CHECK(tests_get_mount_info(&mount_info));
+ if (strcmp(mount_info.mnt_dir,"/") == 0)
+ return;
+ CHECK(getcwd(cwd, 4096) != NULL);
+ CHECK(chdir("/") != -1);
+ CHECK(umount(tests_file_system_mount_dir) != -1);
+ } else {
+ source = mount_info.mnt_fsname;
+ target = tests_file_system_mount_dir;
+ filesystemtype = tests_file_system_type;
+ mountflags = 0;
+ data = NULL;
+ CHECK(mount(source, target, filesystemtype, mountflags, data)
+ != -1);
+ CHECK(chdir(cwd) != -1);
+ }
+}
+
+/* Unmount test file system */
+void tests_unmount(void)
+{
+ tests_mnt(0);
+}
+
+/* Mount test file system */
+void tests_mount(void)
+{
+ tests_mnt(1);
+}
+
/* Check whether the test file system is also the root file system */
int tests_fs_is_rootfs(void)
{
--- /dev/null
+/*
+ * Copyright (C) 2007 Nokia Corporation.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * version 2 as published by the Free Software Foundation.
+ *
+ * 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., 51 Franklin St, Fifth Floor, Boston, MA
+ * 02110-1301 USA
+ *
+ * Author: Adrian Hunter
+ */
+
+#include <unistd.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <stdint.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <sys/time.h>
+#include <time.h>
+#include <limits.h>
+
+#include "tests.h"
+
+#define BLOCK_SIZE 32 * 1024
+
+struct timeval tv_start;
+struct timeval tv_stop;
+
+static inline void start_timer(void)
+{
+ CHECK(gettimeofday(&tv_start, NULL) != -1);
+}
+
+static inline long long stop_timer(void)
+{
+ long long usecs;
+
+ CHECK(gettimeofday(&tv_stop, NULL) != -1);
+ usecs = (tv_stop.tv_sec - tv_start.tv_sec);
+ usecs *= 1000000;
+ usecs += tv_stop.tv_usec;
+ usecs -= tv_start.tv_usec;
+ return usecs;
+}
+
+static unsigned speed(size_t bytes, long long usecs)
+{
+ unsigned long long k;
+
+ k = bytes * 1000000ULL;
+ k /= usecs;
+ k /= 1024;
+ CHECK(k <= UINT_MAX);
+ return (unsigned) k;
+}
+
+void perf(void)
+{
+ pid_t pid;
+ int fd, i;
+ ssize_t written, readsz;
+ size_t remains, block, actual_size;
+ char file_name[256];
+ unsigned char *buf;
+ long long write_time, unmount_time, mount_time, read_time;
+
+ /* Sync all file systems */
+ sync();
+ /* Make random data to write */
+ buf = malloc(BLOCK_SIZE);
+ CHECK(buf != NULL);
+ pid = getpid();
+ srand(pid);
+ for (i = 0; i < BLOCK_SIZE; i++)
+ buf[i] = rand();
+ /* Open file */
+ tests_cat_pid(file_name, "perf_test_file_", pid);
+ start_timer();
+ fd = open(file_name, O_CREAT | O_RDWR | O_TRUNC,
+ S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH);
+ CHECK(fd != -1);
+ CHECK(tests_size_parameter > 0);
+ CHECK(tests_size_parameter <= SIZE_MAX);
+ /* Write to file */
+ actual_size = 0;
+ remains = tests_size_parameter;
+ while (remains > 0) {
+ if (remains > BLOCK_SIZE)
+ block = BLOCK_SIZE;
+ else
+ block = remains;
+ written = write(fd, buf, block);
+ if (written <= 0) {
+ CHECK(errno == ENOSPC); /* File system full */
+ errno = 0;
+ break;
+ }
+ remains -= written;
+ actual_size += written;
+ }
+ CHECK(fsync(fd) != -1);
+ CHECK(close(fd) != -1);
+ write_time = stop_timer();
+ /* Unmount */
+ start_timer();
+ tests_unmount();
+ unmount_time = stop_timer();
+ /* Mount */
+ start_timer();
+ tests_mount();
+ mount_time = stop_timer();
+ /* Open file, read it, and close it */
+ start_timer();
+ fd = open(file_name, O_RDONLY);
+ CHECK(fd != -1);
+ remains = actual_size;
+ while (remains > 0) {
+ if (remains > BLOCK_SIZE)
+ block = BLOCK_SIZE;
+ else
+ block = remains;
+ readsz = read(fd, buf, block);
+ CHECK(readsz == block);
+ remains -= readsz;
+ }
+ CHECK(close(fd) != -1);
+ read_time = stop_timer();
+ CHECK(unlink(file_name) != -1);
+ /* Display timings */
+ printf("File system read and write speed\n");
+ printf("================================\n");
+ printf("Specfied file size: %lld\n", tests_size_parameter);
+ printf("Actual file size: %zu\n", actual_size);
+ printf("Write time (us): %lld\n", write_time);
+ printf("Unmount time (us): %lld\n", unmount_time);
+ printf("Mount time (us): %lld\n", mount_time);
+ printf("Read time (us): %lld\n", read_time);
+ printf("Write speed (KiB/s): %u\n", speed(actual_size, write_time));
+ printf("Read speed (KiB/s): %u\n", speed(actual_size, read_time));
+ printf("Test completed\n");
+}
+
+/* Title of this test */
+
+const char *perf_get_title(void)
+{
+ return "Measure file system read and write speed";
+}
+
+/* Description of this test */
+
+const char *perf_get_description(void)
+{
+ return
+ "Syncs the file system (a newly created empty file system is " \
+ "preferable). Creates a file named perf_test_file_pid, where " \
+ "pid is the process id. The file is filled with random data. " \
+ "The size of the file is given by the -z or --size option, " \
+ "otherwise it defaults to 10MiB. Unmounts the file system. " \
+ "Mounts the file system. Reads the entire file in 32KiB size " \
+ "blocks. Displays the time taken for each activity. Deletes " \
+ "the file. Note that the file is synced after writing and " \
+ "that time is included in the write time and speed.";
+}
+
+int main(int argc, char *argv[])
+{
+ int run_test;
+
+ /* Set default test file size */
+ tests_size_parameter = 10 * 1024 * 1024;
+
+ /* Handle common arguments */
+ run_test = tests_get_args(argc, argv, perf_get_title(),
+ perf_get_description(), "z");
+ if (!run_test)
+ return 1;
+ /* Change directory to the file system and check it is ok for testing */
+ tests_check_test_file_system();
+ /* Do the actual test */
+ perf();
+ return 0;
+}
projects / mtd-utils.git / commitdiff