diff options
| author | bernard.xiong <[email protected]> | 2010-01-19 23:30:28 +0000 |
|---|---|---|
| committer | bernard.xiong <[email protected]> | 2010-01-19 23:30:28 +0000 |
| commit | bbd9f470f04dfd8d7b2afe80ae4a2eef7b841467 (patch) | |
| tree | e413079333ba2f581b5c5515f0f6c01e0ac7f18e /examples/file/readspeed.c | |
| parent | 0b546c0e246b084f8ea6c499db7e251503461519 (diff) | |
add file read speed test.
git-svn-id: https://rt-thread.googlecode.com/svn/trunk@321 bbd45198-f89e-11dd-88c7-29a3b14d5316
Diffstat (limited to 'examples/file/readspeed.c')
| -rw-r--r-- | examples/file/readspeed.c | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/examples/file/readspeed.c b/examples/file/readspeed.c new file mode 100644 index 0000000000..e76471fb47 --- /dev/null +++ b/examples/file/readspeed.c @@ -0,0 +1,50 @@ +#include <rtthread.h>
+#include <dfs_posix.h>
+
+void readspeed(const char* filename, int block_size)
+{
+ int fd;
+ char *buff_ptr;
+ rt_size_t total_length;
+ rt_tick_t tick;
+
+ fd = open(filename, 0, DFS_O_RDONLY);
+ if (fd < 0)
+ {
+ rt_kprintf("open file:%s failed\n", filename);
+ return;
+ }
+
+ buff_ptr = rt_malloc(block_size);
+ if (buff_ptr == RT_NULL)
+ {
+ rt_kprintf("no memory\n");
+ close(fd);
+
+ return;
+ }
+
+ tick = rt_tick_get();
+ total_length = 0;
+ while (1)
+ {
+ int length;
+ length = read(fd, buff_ptr, block_size);
+
+ if (length == 0) break;
+ total_length += length;
+ }
+ tick = rt_tick_get() - tick;
+
+ /* close file and release memory */
+ close(fd);
+ rt_free(buff_ptr);
+
+ /* calculate read speed */
+ rt_kprintf("File read speed: %d byte/s\n", total_length/ (tick/RT_TICK_PER_SECOND));
+}
+
+#ifdef RT_USING_FINSH
+#include <finsh.h>
+FINSH_FUNCTION_EXPORT(readspeed, perform file read test);
+#endif
|