constant ~50% cpu usage according to 'sysctl dev.cpu.*'

[dave]

Just noticed this, wondered if anone could help explain it.

'sysctl dev.cpu.*' pretty much always displays the following values:

dev.cpu.0.cx_usage: 59.95% 40.04% last 20173us
dev.cpu.1.cx_usage: 100.00% last 26422us
dev.cpu.2.cx_usage: 100.00% last 44450us
dev.cpu.3.cx_usage: 100.00% last 18583us

Yet 'top' shows nowhere near this kind of usage:



And neither does the GUI:



I'm running OPNsense 19.7.3-amd64 on an APU2C4 with BIOS v4.10.0.0

[opnfwb]

Do you have the outputs of these two?

dev.cpu.0.cx_supported
dev.cpu.0.cx_lowest

If the supported value is C1 this may be why you're seeing such high values. If you have C states enabled in the BIOS and you are using the Power Savings settings, you should see C2/C3 or even higher values supported.

[dave]

Says "command not found"...?

[k0ns0l3]

try this command :

sysctl dev.cpu | grep cx
sysctl -a |grep -i cpu

greeting k0ns0l3

[dave]

Looks like C1 and C2 is supported, but I never see anything other than a 1Ghz frequency being reported.

EDIT:  Enabling PowerD sorted this out.  I've been reluctant to enable this for some time; last time I did OPNsense became very unstable.  Guess now CPB's incorporated into the BIOS it's working fine.

Usage on core 0 has dropped significantly, that seamed to be stuck at ~50% for hours despite not much of anything going on.

Don't understand why cores 1,2,3 all report constant 100% usage though; do they just not report in any meaningful way?

Code Select Expand

sysctl dev.cpu | grep cx
dev.cpu.3.cx_method: C1/hlt
dev.cpu.3.cx_usage_counters: 8676077
dev.cpu.3.cx_usage: 100.00% last 199us
dev.cpu.3.cx_lowest: C2
dev.cpu.3.cx_supported: C1/1/0
dev.cpu.2.cx_method: C1/hlt
dev.cpu.2.cx_usage_counters: 8302605
dev.cpu.2.cx_usage: 100.00% last 143us
dev.cpu.2.cx_lowest: C2
dev.cpu.2.cx_supported: C1/1/0
dev.cpu.1.cx_method: C1/hlt
dev.cpu.1.cx_usage_counters: 8291231
dev.cpu.1.cx_usage: 100.00% last 9426us
dev.cpu.1.cx_lowest: C2
dev.cpu.1.cx_supported: C1/1/0
dev.cpu.0.cx_method: C1/hlt C2/io
dev.cpu.0.cx_usage_counters: 2045044 9924622
dev.cpu.0.cx_usage: 17.08% 82.91% last 102us
dev.cpu.0.cx_lowest: C2
dev.cpu.0.cx_supported: C1/1/0 C2/2/400

Code Select Expand

sysctl -a |grep -i cpu
kern.smp.cpus: 4
kern.smp.maxcpus: 256
kern.ccpu: 0
  <cpu count="4" mask="f,0,0,0">0, 1, 2, 3</cpu>
    <cpu count="4" mask="f,0,0,0">0, 1, 2, 3</cpu>
      <cpu count="1" mask="1,0,0,0">0</cpu>
      <cpu count="1" mask="2,0,0,0">1</cpu>
      <cpu count="1" mask="4,0,0,0">2</cpu>
      <cpu count="1" mask="8,0,0,0">3</cpu>
kern.sched.cpusetsize: 32
kern.pin_pcpu_swi: 0
kern.racct.pcpu_threshold: 1
cpu     HAMMER
device  cpufreq
kern.vt.splash_cpu_duration: 10
kern.vt.splash_cpu_style: 2
kern.vt.splash_ncpu: 0
kern.vt.splash_cpu: 0
vfs.ncpurgeminvnodes: 512
net.inet.tcp.per_cpu_timers: 0
debug.cpufreq.verbose: 0
debug.cpufreq.lowest: 0
debug.acpi.cpu_unordered: 0
kdb.enter.default=textdump set; capture on; run lockinfo; show pcpu; bt; ps; alltrace; capture off; call doadump; reset
hw.ncpu: 4
hw.acpi.cpu.cx_lowest: C2
dev.amdtemp.0.%desc: AMD CPU On-Die Thermal Sensors
dev.cpufreq.0.%parent: cpu0
dev.cpufreq.0.%pnpinfo:
dev.cpufreq.0.%location:
dev.cpufreq.0.%driver: cpufreq
dev.cpufreq.0.%desc:
dev.cpufreq.%parent:
dev.hwpstate.0.%parent: cpu0
dev.acpi_perf.3.%parent: cpu3
dev.acpi_perf.2.%parent: cpu2
dev.acpi_perf.1.%parent: cpu1
dev.acpi_perf.0.%parent: cpu0
dev.cpu.3.temperature: 49.2C
dev.cpu.3.cx_method: C1/hlt
dev.cpu.3.cx_usage_counters: 8677107
dev.cpu.3.cx_usage: 100.00% last 14312us
dev.cpu.3.cx_lowest: C2
dev.cpu.3.cx_supported: C1/1/0
dev.cpu.3.%parent: acpi0
dev.cpu.3.%pnpinfo: _HID=none _UID=0
dev.cpu.3.%location: handle=\_PR_.P003
dev.cpu.3.%driver: cpu
dev.cpu.3.%desc: ACPI CPU
dev.cpu.2.temperature: 49.2C
dev.cpu.2.cx_method: C1/hlt
dev.cpu.2.cx_usage_counters: 8303616
dev.cpu.2.cx_usage: 100.00% last 51us
dev.cpu.2.cx_lowest: C2
dev.cpu.2.cx_supported: C1/1/0
dev.cpu.2.%parent: acpi0
dev.cpu.2.%pnpinfo: _HID=none _UID=0
dev.cpu.2.%location: handle=\_PR_.P002
dev.cpu.2.%driver: cpu
dev.cpu.2.%desc: ACPI CPU
dev.cpu.1.temperature: 49.2C
dev.cpu.1.cx_method: C1/hlt
dev.cpu.1.cx_usage_counters: 8292305
dev.cpu.1.cx_usage: 100.00% last 210us
dev.cpu.1.cx_lowest: C2
dev.cpu.1.cx_supported: C1/1/0
dev.cpu.1.%parent: acpi0
dev.cpu.1.%pnpinfo: _HID=none _UID=0
dev.cpu.1.%location: handle=\_PR_.P001
dev.cpu.1.%driver: cpu
dev.cpu.1.%desc: ACPI CPU
dev.cpu.0.temperature: 49.2C
dev.cpu.0.cx_method: C1/hlt C2/io
dev.cpu.0.cx_usage_counters: 2045118 9925802
dev.cpu.0.cx_usage: 17.08% 82.91% last 38us
dev.cpu.0.cx_lowest: C2
dev.cpu.0.cx_supported: C1/1/0 C2/2/400
dev.cpu.0.freq_levels: 1000/980 800/807 600/609
dev.cpu.0.freq: 1000
dev.cpu.0.%parent: acpi0
dev.cpu.0.%pnpinfo: _HID=none _UID=0
dev.cpu.0.%location: handle=\_PR_.P000
dev.cpu.0.%driver: cpu
dev.cpu.0.%desc: ACPI CPU
dev.cpu.%parent:
security.jail.param.cpuset.id: 0

[k0ns0l3]

That's not different with me either (apu2,bios v4.10.0.1) :

Code Select Expand

sysctl dev.cpu | grep cx
dev.cpu.3.cx_method: C1/hlt
dev.cpu.3.cx_usage_counters: 26070037
dev.cpu.3.cx_usage: 100.00% last 37124us
dev.cpu.3.cx_lowest: C2
dev.cpu.3.cx_supported: C1/1/0
dev.cpu.2.cx_method: C1/hlt
dev.cpu.2.cx_usage_counters: 26186025
dev.cpu.2.cx_usage: 100.00% last 21595us
dev.cpu.2.cx_lowest: C2
dev.cpu.2.cx_supported: C1/1/0
dev.cpu.1.cx_method: C1/hlt
dev.cpu.1.cx_usage_counters: 26131339
dev.cpu.1.cx_usage: 100.00% last 52575us
dev.cpu.1.cx_lowest: C2
dev.cpu.1.cx_supported: C1/1/0
dev.cpu.0.cx_method: C1/hlt C2/io
dev.cpu.0.cx_usage_counters: 1920478 25752212
dev.cpu.0.cx_usage: 6.93% 93.06% last 1677us
dev.cpu.0.cx_lowest: C2
dev.cpu.0.cx_supported: C1/1/0 C2/2/400


Code Select Expand

sysctl -a |grep -i cpu
kern.smp.cpus: 4
kern.smp.maxcpus: 256
kern.ccpu: 0
  <cpu count="4" mask="f,0,0,0">0, 1, 2, 3</cpu>
    <cpu count="4" mask="f,0,0,0">0, 1, 2, 3</cpu>
      <cpu count="1" mask="1,0,0,0">0</cpu>
      <cpu count="1" mask="2,0,0,0">1</cpu>
      <cpu count="1" mask="4,0,0,0">2</cpu>
      <cpu count="1" mask="8,0,0,0">3</cpu>
kern.sched.cpusetsize: 32
kern.pin_pcpu_swi: 0
kern.racct.pcpu_threshold: 1
cpu HAMMER
device cpufreq
kern.vt.splash_cpu_duration: 10
kern.vt.splash_cpu_style: 2
kern.vt.splash_ncpu: 0
kern.vt.splash_cpu: 0
vfs.ncpurgeminvnodes: 512
net.inet.tcp.per_cpu_timers: 0
debug.cpufreq.verbose: 0
debug.cpufreq.lowest: 0
debug.acpi.cpu_unordered: 0
kdb.enter.default=textdump set; capture on; run lockinfo; show pcpu; bt; ps; alltrace; capture off; call doadump; reset
hw.ncpu: 4
hw.acpi.cpu.cx_lowest: C2
dev.amdtemp.0.%desc: AMD CPU On-Die Thermal Sensors
dev.cpufreq.0.%parent: cpu0
dev.cpufreq.0.%pnpinfo:
dev.cpufreq.0.%location:
dev.cpufreq.0.%driver: cpufreq
dev.cpufreq.0.%desc:
dev.cpufreq.%parent:
dev.hwpstate.0.%parent: cpu0
dev.acpi_perf.3.%parent: cpu3
dev.acpi_perf.2.%parent: cpu2
dev.acpi_perf.1.%parent: cpu1
dev.acpi_perf.0.%parent: cpu0
dev.cpu.3.temperature: 50.6C
dev.cpu.3.cx_method: C1/hlt
dev.cpu.3.cx_usage_counters: 26079894
dev.cpu.3.cx_usage: 100.00% last 75us
dev.cpu.3.cx_lowest: C2
dev.cpu.3.cx_supported: C1/1/0
dev.cpu.3.%parent: acpi0
dev.cpu.3.%pnpinfo: _HID=none _UID=0
dev.cpu.3.%location: handle=\_PR_.P003
dev.cpu.3.%driver: cpu
dev.cpu.3.%desc: ACPI CPU
dev.cpu.2.temperature: 50.6C
dev.cpu.2.cx_method: C1/hlt
dev.cpu.2.cx_usage_counters: 26194688
dev.cpu.2.cx_usage: 100.00% last 38us
dev.cpu.2.cx_lowest: C2
dev.cpu.2.cx_supported: C1/1/0
dev.cpu.2.%parent: acpi0
dev.cpu.2.%pnpinfo: _HID=none _UID=0
dev.cpu.2.%location: handle=\_PR_.P002
dev.cpu.2.%driver: cpu
dev.cpu.2.%desc: ACPI CPU
dev.cpu.1.temperature: 50.6C
dev.cpu.1.cx_method: C1/hlt
dev.cpu.1.cx_usage_counters: 26140208
dev.cpu.1.cx_usage: 100.00% last 33us
dev.cpu.1.cx_lowest: C2
dev.cpu.1.cx_supported: C1/1/0
dev.cpu.1.%parent: acpi0
dev.cpu.1.%pnpinfo: _HID=none _UID=0
dev.cpu.1.%location: handle=\_PR_.P001
dev.cpu.1.%driver: cpu
dev.cpu.1.%desc: ACPI CPU
dev.cpu.0.temperature: 50.6C
dev.cpu.0.cx_method: C1/hlt C2/io
dev.cpu.0.cx_usage_counters: 1922372 25761339
dev.cpu.0.cx_usage: 6.94% 93.05% last 31us
dev.cpu.0.cx_lowest: C2
dev.cpu.0.cx_supported: C1/1/0 C2/2/400
dev.cpu.0.freq_levels: 1000/980 800/807 600/609
dev.cpu.0.freq: 1000
dev.cpu.0.%parent: acpi0
dev.cpu.0.%pnpinfo: _HID=none _UID=0
dev.cpu.0.%location: handle=\_PR_.P000
dev.cpu.0.%driver: cpu
dev.cpu.0.%desc: ACPI CPU
dev.cpu.%parent:
security.jail.param.cpuset.id: 0




greeting k0ns0l3