** Usage
Put:
#+BEGIN_SRC lisp
(load-module "cpu")
#+END_SRC
In your =~/.stumpwmrc=

Then you can use ~%C~ in your mode line format:

#+BEGIN_SRC lisp
  (setf *screen-mode-line-format*
        (list "[%n]"                      ; Groups
              "%v"                        ; Windows
              "^>"                        ; Push right
              " | %C"                     ; CPU module
              " | %d"))                   ; Clock
#+END_SRC

You can customize what's displayed in CPU module by changing the ~cpu::*cpu-modeline-fmt*~ variable in your =init.lisp=:

#+BEGIN_SRC lisp
  (setf cpu::*cpu-modeline-fmt* "%c %t") ; default is "%c (%f) %t"
#+END_SRC

|------+---------------------|
| Code | Result              |
|------+---------------------|
| %%   | A literal '%'       |
| %c   | CPU usage           |
| %C   | CPU usage graph     |
| %f   | CPU frequency       |
| %r   | CPU frequency range |
| %t   | CPU temperature     |
|------+---------------------|

You can see the rest of the variables in the =cpu.lisp= file.

** Notes

This is specific to Linux.