测量某个Linux驱动程序模块的内存使用情况 [英] Measure memory usage of a certain Linux driver module

问题描述

我想检查刚刚完成的内核驱动程序模块是否存在内存泄漏问题.但是我不知道如何在内核空间中做到这一点.我认为动态内存分配非常难以处理.任何人都有调试内核空间中此类内存问题的经验吗?或者，我可以使用哪个工具来衡量特定内核模块的动态内存使用情况?

I want to check whether the kernel driver module which I just finished has a memory leak problem. But I don't know how to do it in kernel space. Dynamic memory allocation is very hard to handle I think. Anyone has the experience in debugging such memory problem in kernel space? Or, which tool can I use to measure the dynamic memory usage of a specific kernel module?

推荐答案

在内核模块中跟踪分配和释放内存确实很困难，但是您仍然有一些便利.这是研究内核空间内存泄漏的几种工具和方法.

It's really hard to track allocation and freeing memory in a kernel module, but you have some facilities still. Here are a couple tools and approaches to investigate memory leakage in kernel space.

1. /proc/slabinfo(slabtop).它收集有关内核结构的信息.与模块无关.但这可能还是很有帮助的.

1. /proc/slabinfo (slabtop). It collects information about kernel structures. Not really about a module one. But it still might be very helpful.

Kmem和ftrace .只是链接:

https://www.kernel.org/doc/Documentation/跟踪/事件-kmem.txt

http://elinux.org/Kernel_dynamic_memory_analysis

捕获每个kmalloc，kfree等事件，并与它们一起产生相关信息.(c)

1. /proc/modules(lsmod).除了提供有关模块加载时使用多少内存的信息外，没有什么特别的.实际上，这只是一个模块的大小.

1. /proc/modules (lsmod). Nothing special except information how much memory a module uses when it's loaded. In fact it's just the size of a module.

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