Problem in proc(5), regarding loadavg

Problem in proc(5), regarding loadavg

[Juliano F. Ravasi]

Hi,

I found that the information on proc(5) in the latest version of
man-pages (3.21) do not seem to match the real implementation, regarding
the file /proc/loadavg.

The manual page says that:

	"The first of these [the two numbers of the fourth field] is the
	number of currently executing kernel scheduling entities
	(processes, threads); this will be less than or equal to the
	number of CPUs."

By looking at the implementation in (v2.6.29)/fs/proc/loadavg.c, this
field returns the value of `nr_running()', which is defined in
/kernel/sched.c and returns the current number of *runnable* threads. It
is easily verifiable that this value may and will be greater the number
of CPUs if you start a number of processing-intensive threads, then
inspect /proc/loadavg.

Best regards,
Juliano.


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Juliano F. Ravasi ·· http://juliano.info/
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