accessing cpu information from linux kernel module -


i need access cpu idle time every 1 minute linux kernel module , print kern.log can plot graph statistics. please help.

thanks in advance.

you don't need write kernel module that, information provided in /proc/stat:

$ awk ' /^cpu/ { print $1, $5 / 100; } ' /proc/stat cpu 251908 cpu0 63149.6  <--- total idle time in seconds  cpu1 62053.2 ...

where 100 user_hz constant (100 on systems).

if still wish write kernel module, can re-use /proc/stat code here: fs/proc/stat.c.


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