why does clocked speed show up on arm64 but not on amd64?
- Reply: dmilith .: "Re: why does clocked speed show up on arm64 but not on amd64?"
- Go to: [ bottom of page ] [ top of archives ] [ this month ]
Date: Fri, 12 Nov 2021 13:56:35 UTC
Hi, WHy does the clocked speed *not* show up on intel hardware in sysctl dev.cpu ? It shows up in arm64 (ARM Cortex-A72) intel: % dmesg | grep 42 FreeBSD clang version 12.0.1 (git@github.com:llvm/llvm-project.git llvmorg-12.0.1-0-gfed41342a82f) CPU: Intel(R) Core(TM) i7-4770K CPU @ 3.50GHz (4251.32-MHz K8-class CPU) ^^^^^^^^^^^ shows in dmesg as above, but not in the dev.cpu sysctl % sysctl dev.cpu.0 | less dev.cpu.0.cx_method: C1/hlt dev.cpu.0.cx_usage_counters: 1096037 dev.cpu.0.cx_usage: 100.00% last 4436us 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: 43.0C 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: 57 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 But on the raspberry pi 4, the overclock shows in the sysctl *only* % sysctl dev.cpu.0 dev.cpu.0.temperature: 49.1C dev.cpu.0.freq_levels: 2100/-1 600/-1 dev.cpu.0.freq: 2100 dev.cpu.0.%parent: cpulist0 dev.cpu.0.%pnpinfo: name=cpu@0 compat=arm,cortex-a72 dev.cpu.0.%location: dev.cpu.0.%driver: cpu dev.cpu.0.%desc: Open Firmware CPU why the difference? The only place I'm expecting the overclock to not be present would be on the rpi4, in its dmesg because u-boot hands off to the OS, and maybe the cpu speed is missed in the handover. However, I *am* able to see it here, on intel: hw.clockrate: 4251 machdep.tsc_freq: 4251320612 but i'm puzzled why on intel it's not in dev.cpu.0.freq The rpi4 doesn't have these two oids thanks, -- J.