import RT-Thread@9217865c without bsp, libcpu and components/net

examples/file/readspeed.c

@@ -0,0 +1,89 @@
+/*
+ * Copyright (c) 2006-2021, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2010-02-10     Bernard      first version
+ * 2020-04-12     Jianjia Ma   add msh cmd
+ */
+
+#include <rtthread.h>
+#include <dfs_file.h>
+#include <unistd.h>
+#include <stdio.h>
+#include <sys/stat.h>
+#include <sys/statfs.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, 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);
+
+static void cmd_readspeed(int argc, char *argv[])
+{
+    char* filename;
+    int block_size;
+
+    if(argc == 3)
+    {
+        filename = argv[1];
+        block_size = atoi(argv[2]);
+    }
+    else if(argc == 2)
+    {
+        filename = argv[1];
+        block_size = 512;
+    }
+    else
+    {
+       rt_kprintf("Usage:\nreadspeed [file_path] [block_size]\n");
+       rt_kprintf("readspeed [file_path] with default block size 512\n");
+       return;
+    }
+    readspeed(filename, block_size);
+}
+MSH_CMD_EXPORT_ALIAS(cmd_readspeed, readspeed, test file system read speed);
+#endif /* RT_USING_FINSH */