Hi Christian,
> My guess would be that state1 can't be entered, i.e.
> entered_state = target_state->enter(dev, drv, index);
> returns < 0, in that case the sysfs 'rejected' field
> will be incremented instead of usage and time.
> Is that the case for you?
Yes, I checked your guess was correct. ``enter_state`` value equals to Zero.
``#cat /sys/devices/system/cpu/cpu*/cpuidle/state*/rejected``
0 ==> state_0 CPU(0)
0 ==> state_1 CPU(0)
0 ==> state_0 rejected values CPU(1)
600117 ==> state_1 increasing values CPU(1)
0
854505
0
41756644
> In that case your psci description is probably wrong
> and doesn't match your system.
What do you mean by ``psci`` description ?
I have one node in the device tree file.
psci {
compatible = "arm,psci-1.0";
method = "smc";
};
On Tue, Oct 15, 2024 at 3:12 PM Christian Loehle
<christian.loehle@xxxxxxx> wrote:
>
> On 10/14/24 16:49, Vivek yadav wrote:
> > * # Be careful, this email looks suspicious; * User Impersonation: The display name on this email is very similar to an internal user but was sent from an email address not normally used by the person. *
> > Hi Christian,
> >
> >> What is the value of
> >> cat /sys/devices/system/cpu/cpu*/cpuidle/state*/usage?
> >
> > 0 ===>CPU0 state0 (WFI)
> > 0 ===>CPU0 state1 (cpu-retention)
> > 408 ==> these values are increasing
> > 0
> > 38
> > 0
> > 14
> > 0
> >
> >> What if you disable state0 on all CPUs?
> >> echo 1 > /sys/devices/system/cpu/cpu*/cpuidle/state0/disable
> >
> > After executing above command. CPU Idle state WFI time stopped. But
> > no change in ``state1`` time.
> >
> > ``cat /sys/devices/system/cpu/cpu*/cpuidle/state*/time``
> >
> > OUTPUT:
> > 0 ===>CPU0 state0 (WFI)
> > 0 ===>CPU0 state1 (cpu-retention)
> >
> > increasing some time value(23968) ===>CPU1 state0 (WFI)
> > 0 ===>CPU1 state1 (cpu-retention)
> >
> > increasing some time value(17512) ==> now it also not increasing
> > 0
> >
> > increasing some time value(6661)
> > 0
> >
> > ``cat /sys/devices/system/cpu/cpu*/cpuidle/state*/usage``
> >
> > 0 ===>CPU0 state0 (WFI)
> > 0 ===>CPU0 state1 (cpu-retention)
> >
> > 408 ==> now these values also stop increasing
> > 0
> >
> > 42
> > 0
> >
> > 14
> > 0
>
> My guess would be that state1 can't be entered, i.e.
> entered_state = target_state->enter(dev, drv, index);
> returns < 0, in that case the sysfs 'rejected' field
> will be incremented instead of usage and time.
>
> Is that the case for you?
> In that case your psci description is probably wrong
> and doesn't match your system.
>
> Regards,
> Christian
>
>
