Re: Free memory, include "cached"?

[Gilles Chanteperdrix <gilles.chanteperdrix@xxxxxxxxx>]

Gregoire Banderet wrote:
> Matthias Kaehlcke wrote:
>> El Tue, Oct 14, 2008 at 02:14:46PM +0200 Gregoire Banderet ha dit:
>>
>>> anubhav rakshit wrote:
>>>>> I have to report the amount of FreeMem on my embedded system. The rootfs
>>>>> is in RAM. I use /proc/meminfo.
>>>>> I started by doing : freemem = MemFree + Buffers + Cached
>>>>> But I realized (tell me if I'm wrong) that my rootfs filesystems is
>>>>> counted in "Cached".
>>>>> Part of the memory in "Cached" can be allocated, so I should add it as
>>>>> Free Memory, but part of it is my rootfs (i.e. really used).
>>>>> How should I compute freemem ?
>>>> Have you tried the free command.
>>> Yes. What I need is to know which part of "Cached" is used for RAMFS.
>> to know the size of your ramfs you may execute the following command:
>>
>> du -hx -d 0 /

If you want to get the space occupied on a partition, you should use df,
not du.

> 
> Yeah, that's a good idea. I was searching for a system call, but I'll 
> use your solution if nothing else exist.

df probably uses a system call to know what space is used on a
partition. So, you should check df sources.

-- 
                                                 Gilles.


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