in fact i don't need to change the policy of the process, i just want to know weather the process is used in rq or not.
for example i have opened a lot of apps like pdf reader and google chrome now i'am using google chrome, and still the pdf reader in the rq.. right ? how can i detect that the user is not using the pdf reader from sched function ?
On Tue, Apr 21, 2015 at 5:19 AM, Ruben Safir <ruben@xxxxxxxxxxxx> wrote:
it has nothing to do with the load_weight. I can be corrected on thisOn Mon, Apr 20, 2015 at 11:58:17PM +0200, Mustafa Hussain wrote:
> I have reading recently how CFS works and I want to detect processes that
> is not used and have the policy SCHED_NORMAL,
>
> Can i do this by tracking load_weight for each process if the load dose not
> change over the time can i consider this process is not used ?
but it is configuration.
There are functions that can be coded that adjust the class of priority
for a thread or process such as
/**
* sched_setscheduler - change the scheduling policy and/or RT priority
* of a thread.
* @p: the task in question.
* @policy: new policy.
* @param: structure containing the new RT priority.
*
* Return: 0 on success. An error code otherwise.
*
* NOTE that the task may be already dead.
*/
int sched_setscheduler(struct task_struct *p, int policy,
const struct sched_param *param)
{
return _sched_setscheduler(p, policy, param, true);
}
EXPORT_SYMBOL_GPL(sched_setscheduler);
in linux/kernel.sched/core.c
download the Kernel Source Code and take a look
Ruben
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