1、编写监控程序读取磁盘监控文件/proc/diskstats，找出磁盘读的次数、写的次数，读字节数、磁盘写耗时；

以下是一个示例程序，它可以读取`/proc/diskstats`文件并提取所需的信息：

import time

def read_diskstats(device):
    with open('/proc/diskstats', 'r') as f:
        for line in f:
            if line.startswith(device):
                fields = line.split()
                read_count = int(fields[3])
                read_bytes = int(fields[5]) * 512
                write_count = int(fields[7])
                write_bytes = int(fields[9]) * 512
                io_time = int(fields[13])
                return (read_count, read_bytes, write_count, write_bytes, io_time)
    return None

device = 'sda' # 修改为要监控的磁盘设备名

while True:
    stats = read_diskstats(device)
    if stats:
        print(f'Device: {device}, Read Count: {stats[0]}, Read Bytes: {stats[1]}, Write Count: {stats[2]}, Write Bytes: {stats[3]}, IO Time: {stats[4]}')
    else:
        print(f'Error: Device {device} not found in /proc/diskstats')
    time.sleep(1)

这个程序会每秒钟读取一次`/proc/diskstats`文件并输出所需的信息。你可以根据需要修改设备名称或输出格式。