what does nr_iowait_cpu() do?

[Andev]

On Mon, Jul 14, 2014 at 10:21 PM, Mohammad Merajul Islam Molla
<meraj.enigma at gmail.com> wrote:
> Hi Andev,
>
> Thanks for reply. I got the definition too. What I really want to know
> is what this variable nr_iowait stands for?
> Is it counting pending input/output on a cpu?
>
>
> --
> - Meraj
>
>
>
> On Tue, Jul 15, 2014 at 8:07 AM, Andev <debiandev at gmail.com> wrote:
>> On Mon, Jul 14, 2014 at 10:10 AM, Mohammad Merajul Islam Molla
>> <meraj.enigma at gmail.com> wrote:
>>> Hello,
>>>
>>> I was looking into the code of cpuidle menu governor and it uses a
>>> function nr_iowait_cpu(int cpu).
>>> I could not find out what this function does.
>>>
>>> Can someone please explain what nr_iowait_cpu(int cpu) and variant
>>> nr_iowait() do?
>>>
>>> --

Now that is a better question. Try looking up what nr_iowait is.

>>
>> In all its glory:
>>
>> unsigned long nr_iowait_cpu(int cpu)
>> {
>>     struct rq *this = cpu_rq(cpu);
>>     return atomic_read(&this->nr_iowait);
>> }
>>
>>
>>> Thanks,
>>> -Meraj
>>>
>>> _______________________________________________
>>> Kernelnewbies mailing list
>>> Kernelnewbies at kernelnewbies.org
>>> http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
>>
>>
>>
>> --
>> Andev



-- 
Andev