哪些文件占用了进程的大部分 I/O 时间？
我有一个相当大的 python 程序，导致大量磁盘 I/O（在 top 上，%wa 可以高达 80，而 iotop< /code> 说我的进程是罪魁祸首）。
有几件事可能会导致这一问题 - 我正在写入多个日志文件，并且我正在将缓存结果保存到磁盘的多个位置，因此我应该将注意力集中在哪里并不是很明显。
是否有 Linux 工具或 Python 技巧可以让我查看哪个子系统导致了最多的 I/O 操作？
I have a fairly large python program that is causing a lot of disk I/O (on top, %wa can get as high as 80, and iotop says that my process is the culprit).
There are several things that may cause this - I'm writing to more than one log file, and I'm saving cached results to disk in several places, so it's not immediately obvious where I should focus my attention.
Is there a linux tool or a python trick that will allow me to see which subsystem is causing the most I/O operations?
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你应该看看 SystemTap。它是非常强大的 Linux 系统调用跟踪和分析机制：
http://sourceware.org/systemtap/wiki
我确信可以准确追踪到哪个文件描述符负责 IO 负载 - 但使用 systemtap 启动会变得复杂。
You should have a look at SystemTap. It's very powerful tracing and profiling mechanism for Linux system calls:
http://sourceware.org/systemtap/wiki
I'm sure it is possible to trace exactly which file descriptor is responsible for IO load - but it will get complicated to start with systemtap.