Python - 如何从WMI计算每个进程的IOPS

Question

我想测量PostgreSQL进程的IOPS，我不认为我做得对。

代码：

def Postgres_Process_IO(self, pid_str):
    io_dict = {}
    total_io_bytes = 0
    for x in range(2):
        for io in self.wmi.query(
                "SELECT IOReadBytesPerSec, IOWriteBytesPerSec, Timestamp_Sys100NS FROM Win32_PerfRawData_PerfProc_Process WHERE IDProcess = {}".format(
                        pid_str)):
            io_read_bytes_1, io_write_bytes_1, time_1 = int(io['IOReadBytesPerSec']), int(io['IOWriteBytesPerSec']), long(io['Timestamp_Sys100NS'])
            io_read_bytes_0, io_write_bytes_0, time_0 = io_dict.get(io, (0, 0, 0))
            io_read_bytes = io_read_bytes_1 - io_read_bytes_0
            io_write_bytes = io_write_bytes_1 - io_write_bytes_0
            time_stamp = float((time_1 - time_0)) / 10000000
            io_dict[io] = (io_read_bytes_1, io_write_bytes_1, time_1)
            if x > 0:
                total_io_bytes += ((io_read_bytes / time_stamp) + (io_write_bytes / time_stamp))
    return total_io_bytes / 1024

与此同时，我用这个命令强调PostgreSQL服务器： ＆＃34; pgbench -h / tmp -i -s 60＆＃34;

我的代码输出： 353626.09＃KB

这似乎高达一秒钟，我做错了什么？