Question about xserve G5

[Javi Hotmail]

If I'm not mistake the issue then is how the PPC implementation reads
the device tree data from open firmware correct?.

I believe this implementation is within:

pcr.c        pmcr.c        pmufreq.c


Thanks in advance,

Javi.


On 29/10/2020 12:26, Michael Tuexen wrote:
>
>> On 29. Oct 2020, at 10:51, Javi Hotmail <volkovdablo at hotmail.com> wrote:
>>
>> Hello all,
>>
>> I'm new in this mailing list, although I've been going back and forth
>> with PPC (G4/G5) and FreeBSD since 9.0.
>>
>> I have a question that perhaps some of you already stumbled across, but
>> I wanted to know if there is a way to get it to work before I jump in
>> the code.
>>
>> I have a xserve G5 dual 2.3Ghz, and I installed FreeBSD 12.1. Works
>> quite well, but I cannot get cpufreq + powerd/powerdxx to work at all.
>>
>> I get this:
>>
>> # powerdxx
>> powerd++: (ENOFREQ) cannot access dev.cpu.0.freq, at least the first CPU
>> core must support frequency updates
>>
>>
>> This is the relevant part of sysctl:
>> # sysctl dev.cpu
>> dev.cpu.1.%parent: cpulist0
>> dev.cpu.1.%pnpinfo: name=PowerPC,G5
>> dev.cpu.1.%location:
>> dev.cpu.1.%driver: cpu
>> dev.cpu.1.%desc: Open Firmware CPU
>> dev.cpu.0.%parent: cpulist0
>> dev.cpu.0.%pnpinfo: name=PowerPC,G5
>> dev.cpu.0.%location:
>> dev.cpu.0.%driver: cpu
>> dev.cpu.0.%desc: Open Firmware CPU
>> dev.cpu.%parent:
>>
>> The issue is that after few minutes the fans ramp up to insane levels,
>> and my goal with this is to use powerd or powerdxx to manage the situation.
> The fans ramping up is a known issue. One way to work around it is to
> disable SMP.
>
> To disable SMP, put in /boot/loader.conf
> kern.smp.disabled=1
>
> Best regards
> Michael
>>
>> Thanks in advance,
>>
>> Javi.
>>
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