problems with powerd and cpufreq on AMD Quad-Core A8-4555M

John freebsd-lists at
Sun Feb 28 16:07:07 UTC 2016

Hello list, I've been able to get some more info. cc'd to
freebsd-performance@ which on 2nd thoughts might have been the better 
place to ask... 

[ powerd: no cpufreq(4) support -- aborting: No such file or directory ]

Right, I've found that what this chip has is AMD Turbo Core. So really
my question is, can powerd make use of Turbo Core? Here's some sysctl

# sysctl -a | grep dev.cpu
dev.cpu.3.cx_usage: 100.00% 0.00% last 79194us
dev.cpu.3.cx_lowest: C1
dev.cpu.3.cx_supported: C1/1/0 C2/2/100
dev.cpu.3.temperature: 47.6C
dev.cpu.3.%parent: acpi0
dev.cpu.3.%pnpinfo: _HID=none _UID=0
dev.cpu.3.%location: handle=\_PR_.C003
dev.cpu.3.%driver: cpu
dev.cpu.3.%desc: ACPI CPU
dev.cpu.2.cx_usage: 100.00% 0.00% last 45553us
dev.cpu.2.cx_lowest: C1
dev.cpu.2.cx_supported: C1/1/0 C2/2/100
dev.cpu.2.temperature: 47.6C
dev.cpu.2.%parent: acpi0
dev.cpu.2.%pnpinfo: _HID=none _UID=0
dev.cpu.2.%location: handle=\_PR_.C002
dev.cpu.2.%driver: cpu
dev.cpu.2.%desc: ACPI CPU
dev.cpu.1.cx_usage: 100.00% 0.00% last 40us
dev.cpu.1.cx_lowest: C1
dev.cpu.1.cx_supported: C1/1/0 C2/2/100
dev.cpu.1.temperature: 47.6C
dev.cpu.1.%parent: acpi0
dev.cpu.1.%pnpinfo: _HID=none _UID=0
dev.cpu.1.%location: handle=\_PR_.C001
dev.cpu.1.%driver: cpu
dev.cpu.1.%desc: ACPI CPU
dev.cpu.0.cx_usage: 100.00% 0.00% last 17478us
dev.cpu.0.cx_lowest: C1
dev.cpu.0.cx_supported: C1/1/0 C2/2/100
dev.cpu.0.temperature: 47.6C
dev.cpu.0.%parent: acpi0
dev.cpu.0.%pnpinfo: _HID=none _UID=0
dev.cpu.0.%location: handle=\_PR_.C000
dev.cpu.0.%driver: cpu
dev.cpu.0.%desc: ACPI CPU


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