05:37 <dhruvag2000> Is there any vendor who has implemented CPUIDle for entire cluster (cpu standby) in TF-A ? I was facing a few issues on an A53 dual core system where I am not able to see the 2 cores enter the cpu_standby simultaneously.

05:39 <dhruvag2000> https://usercontent.irccloud-cdn.com/file/lb3z0pSt/cpuidle_waveforms.png

05:39 <dhruvag2000> D0: CPU 1

05:39 <dhruvag2000> D1: CPU 2

05:39 <dhruvag2000> D2: WFI EXIT

05:39 <dhruvag2000> We thus are never able to see the full cluster enter standby at the same time. This will prevent any system / cluster wide idle state.

05:39 <dhruvag2000> What we can observe is, when CPU 0 goes into TFA WFI (in cpu_standby), it comes out of it after some time (see the very next red pulse after a white pulse). Meanwhile, the other CPU seems to enter and immediately exit WFI.

06:01 <dhruvag2000> https://usercontent.irccloud-cdn.com/file/A4KHSXwE/cpuidle-wave-2.png

06:02 <dhruvag2000> Simpler representation: *HI* : just after exiting WFI, *LO*: Just upon entering WFI

13:31 <ajb-linaro> Fixing up the fixup handler for Altra I wonder is there any comprehensive testing in the kernel for alignment handlers?

14:27 <labestia> hello