Van: Poul-Henning Kamp <p...@phk.freebsd.dk> Datum: zondag, 25 augustus 2024 10:29 Aan: Ronald Klop <ronald-li...@klop.ws> CC: Bob Bishop <r...@gid.co.uk>, "curr...@freebsd.org" <curr...@freebsd.org> Onderwerp: Re: powerd forgets top CPU frequency ?
-------- Ronald Klop writes: > A bit weird to try to give suggestions knowing how experienced you are in FreeBSD. But here we go, I'm not very experienced with how modern CPU's are modulated :-) > 1. What does the sysctl about cpu frequencies say. Does that value decrease too? > On my machine it is this: > # sysctl dev.cpu | grep freq > dev.cpu.0.freq_levels: 1500/-1 600/-1 > dev.cpu.0.freq: 1500 Right now: dev.cpu.7.freq_levels: 2803/-1 dev.cpu.7.freq: 3103 dev.cpu.5.freq_levels: 2803/-1 dev.cpu.5.freq: 3103 dev.cpu.3.freq_levels: 2803/-1 dev.cpu.3.freq: 3103 dev.cpu.1.freq_levels: 2803/-1 dev.cpu.1.freq: 3103 dev.cpu.6.freq_levels: 2803/-1 dev.cpu.6.freq: 3103 dev.cpu.4.freq_levels: 2803/-1 dev.cpu.4.freq: 3103 dev.cpu.2.freq_levels: 2803/-1 dev.cpu.2.freq: 3103 dev.cpu.0.freq_levels: 2803/-1 dev.cpu.0.freq: 3103 > 2. Does https://www.freshports.org/sysutils/powerdxx/ exhibit the same issue? To rule out if it is in the binary or in the kernel. Will try. > 3. out-of-the-box: are your CPUs similar? So, do both have the same top frequency? Yes, it's a: 11th Gen Intel(R) Core(TM) i7-1165G7 @ 2.80GHz > 4. And powerd(8) mentions a -v option: "Verbose mode. Messages about power changes will be printed to stdout and powerd will operate in the foreground." > Does that print anything useful? Yes, that's where I noticed the "gradually run slower and slower"... Initially I thought it was some kind of thermal throttling, but leaving the computer idle overnight did not lead to automatic recovery, whereas reboots and as far as I can tell, restarting powerd does. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence.
dev.cpu.7.freq_levels: 2803/-1 dev.cpu.7.freq: 3103 This is interesting by itself. According to the sysctl the CPU only has 1 frequency to select, which is 2803, but it is running on 3103. Maybe there is some other mechanism which influences the CPU freq on your machine. I hope somebody else can shine some light on this. Doesn't the output (or source) of powerd give some insight on why it makes the decisions it makes? Regards, Ronald.
