clocked speed not showing in dev.cpu.[0-7].freq

[Chris]

On 2021-04-27 11:28, Ian Lepore wrote:
> On Tue, 2021-04-27 at 19:22 +0100, tech-lists wrote:
>> Hi,
>> 
>> Not sure where to put this. system is amd64/stable/13. It's running
>> powerd but with no additional flags.
>> 
>> CPU is Intel(R) Core(TM) i7-4770K CPU. Has 32GB RAM
>> 
>> The system is clocked in the bios at 4.251 GHz. I never see this
>> value
>> in sysctl dev.cpu.[0-7].freq though. Here's the output:
>> 
>> [...]
>> sysctl dev.cpu.0
>> dev.cpu.0.cx_method: C1/hlt
>> dev.cpu.0.cx_usage_counters: 100878534
>> dev.cpu.0.cx_usage: 100.00% last 185us
>> dev.cpu.0.cx_lowest: C1
>> dev.cpu.0.cx_supported: C1/1/0
>> dev.cpu.0.freq_levels: 3400/84000 3200/77169 3100/73848 2900/67388
>> 2700/61182 2500/55201 2400/52298 2200/46677 2000/41272 1800/36091
>> 1700/34277 1500/29407 1300/24752 1100/20312 1000/18167 800/14031
>> dev.cpu.0.freq: 3400
>> dev.cpu.0.temperature: 68.0C
>> dev.cpu.0.coretemp.throttle_log: 0
>> dev.cpu.0.coretemp.tjmax: 100.0C
>> dev.cpu.0.coretemp.resolution: 1
>> dev.cpu.0.coretemp.delta: 32
>> dev.cpu.0.%parent: acpi0
>> dev.cpu.0.%pnpinfo: _HID=none _UID=0 _CID=none
>> dev.cpu.0.%location: handle=\_PR_.CPU0
>> dev.cpu.0.%driver: cpu
>> dev.cpu.0.%desc: ACPI CPU
>> 
>> Here's the cpu string on boot:
>> 
>> CPU: Intel(R) Core(TM) i7-4770K CPU @ 3.50GHz (4251.32-MHz K8-class
>> CPU)
>> 
>> So, is it really clocked? or does the sysctl show what is right?
>> 
>> thanks,
> 
> The same is true on my system:
> 
> CPU: Intel(R) Xeon(R) CPU  W3680  @ 3.33GHz (4250.09-MHz K8-class CPU)
> 
> dev.cpu.0.freq_levels: 3334/143000 3333/130000 3200/117000 3067/105000
> 2933/94000 2800/85000 2667/76000 2533/68000 2400/61000 2267/54000
> 2133/48000 2000/43000 1867/39000 1733/35000 1600/32000
> 
> I've clocked this cpu at various speeds between 4.25 - 5.0 ghz over the
> years (faster when it was younger, more conservative now that it's
> old).  The value in parens (4250.09) changes accordingly, but the
> values in the sysctl never do.  I'm sure this is running at the
> overclocked speed (various benchmark values change as they should when
> changing the OC values in the bios).
FWIW on all my AMD CPUs that top out @4.25-4.50Ghz FreeBSD reports
3.8Ghz. I get the idea the FreeBSD returns the average (running) top
speed on CPU0

--Chris
> 
> -- Ian
> 
> 
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