Write Linux kernel module to collect data from the kernel

rcbandit · Post by **rcbandit** » 2011/09/13 07:40:38

Hi,
I want to write a Linux kernel module which collects the CPU, RAM and HDD load. I can write a simple kernel module but I don't have any idea where where to find the data from the kernel I need. Can you help me and point me where I can find in the kernel those data?

Regards
Peter

Post by **TrevorH** » 2011/09/13 08:36:56

All that information is already available in /proc and various utilities use it including top, sar, vmstat and iostat.

rcbandit · Post by **rcbandit** » 2011/09/13 09:45:10

Yes. But /proc in my case is not a solution

r_hartman · Post by **r_hartman** » 2011/09/13 09:56:32

So? Why not? Please elaborate.

rcbandit · Post by **rcbandit** » 2011/09/13 10:06:47

I need a solution that can be deployable in every Linux distribution.
As far as I know /proc in different architectures is different. And sometimes is missing.

Post by **TrevorH** » 2011/09/13 11:41:37

/proc comes from the kernel and is likely to be constant across distributions. Across [u]architectures[/u] it is probably the same but I don't use anything except Intel/AMD so cannot swear to this. Chances are that if it is then you kernel module would need to be different too.

CentOS