On Tue, Mar 23, 2021 at 11:44:50PM -0500, Samuel Holland wrote:
> 3) Modify the Linux PSCI client to respect PSCI_FEATURES when setting
>psci_ops.cpu_suspend. cpuidle-psci checks for this function before
>setting up idle states.
We don't call PSCI_FEATURES on mandatory functions as it may
Hi Samuel,
On Tue, Mar 23, 2021 at 11:44:50PM -0500, Samuel Holland wrote:
> On 3/22/21 8:56 PM, Andre Przywara wrote:
> >> I'm sending this patch as an RFC because it raises questions about how
> >> we handle firmware versioning. How far back does (or should) our support
> >> for old TF-A and Cru
On 3/22/21 8:56 PM, Andre Przywara wrote:
>> I'm sending this patch as an RFC because it raises questions about how
>> we handle firmware versioning. How far back does (or should) our support
>> for old TF-A and Crust versions go?
>>
>> cpuidle has a problem that without working firmware support, C
On Mon, 22 Mar 2021 01:25:14 -0500
Samuel Holland wrote:
Hi,
> Powering off idle CPUs saves about 33 mW compared to using WFI only.
> Additional power savings are possible by idling the L2 and downclocking
> the cluster when all CPUs are idle.
>
> Entry and exit latency were measured using a lo
Powering off idle CPUs saves about 33 mW compared to using WFI only.
Additional power savings are possible by idling the L2 and downclocking
the cluster when all CPUs are idle.
Entry and exit latency were measured using a logic analyzer, with GPIO
pins toggled in Linux after the calls to trace_cpu
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