2012/11/26 Steven Rostedt <rost...@goodmis.org>:
> On Fri, 2012-11-23 at 15:21 +0100, Frederic Weisbecker wrote:
>> We have thread_group_cputime() and thread_group_times(). The naming
>> doesn't provide enough information about the difference between
>> these two APIs.
>>
>> To lower the confusion, rename thread_group_times() to
>> thread_group_cputime_adjusted(). This name better suggests that
>> it's a version of thread_group_cputime() that does some stabilization
>> on the raw cputime values. ie here: scale on top of CFS runtime
>> stats and bound lower value for monotonicity.
>
> But, thread_group_times() does not do any type of adjustment. It only
> retrieves the cpu times:
>
> void thread_group_times(struct task_struct *p, cputime_t *ut, cputime_t *st)
> {
> struct task_cputime cputime;
>
> thread_group_cputime(p, &cputime);
>
> *ut = cputime.utime;
> *st = cputime.stime;
> }
This is the CONFIG_VIRT_CPU_ACCOUNTING only version. It also needs
some monotonicity guard IMO but that's another issue.
But please look at the other version.
> It retrieves the current times, it doesn't adjust them.
>
> I'm thinking the current name is more accurate.
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majord...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
