Issues with CPU frequency after upgrade 23.01

stephenw10

You might have higher level C states available already. In previous testing those tend to swamp any savings made by P states except at moderate CPU usage. Check 'sysctl dev.cpu.0'

You can disable Speed Shift and go back to using Powerd:
https://man.freebsd.org/cgi/man.cgi?query=hwpstate_intel#LOADER_TUNABLES

One interesting thing is that the speedshift driver can attach and enable on CPUs even when SpeedStep is disabled in the BIOS. So on systems where that can't be enabled it makes quite a difference. Like on this i3-6100t:

Screenshot from 2023-02-21 23-06-36.png

Steve

bingo600

@stephenw10
How do you do that nice Temp Graph ??
Is that "external" via snmp or so ???

I can pull some (last hour) cpu info from the Zabbix FreeBSD plugin, but not temp

/Bingo

stephenw10

Nope it's the Thermal Sensors graph from Status > Monitoring.

bingo600

Dooh ...

That's a super nice feature - The monitoring stuff .... Was disabled on my Box.

Found it

Thnx

stephenw10

Yeah, that was added relatively recently. It can be very useful in diagnosing hardware issues.

bingo600

I have just upgraded my Hystou from 23.01 to 23.05.
It was a succesfull upgrade (as usual)
Well ... besides the zabbix client package. But i have learnt that this one always have issues. So delete & reinstall after bootup.

What i noticed though, was that the Hystou was again running quite hot ....
Behaving 100% like on 23.01 (first post).

So i added the "tunables entries once more", and disabled powerD

And it seems to helped again.

Was i too impatient ??
I would ave expected 23.05 to have implemented the fix ....

/Bingo

stephenw10

There is no additional tuning for SpeedShift in 23.05.

It will be enabled by support if your CPU supports it and the default values run the CPU faster/hotter than SpeedStep did on a system expected to run at low load.

Adding tunables to set the targets like that (or even higher numbers) will return the performance to SpeedStep like level. Except that SpeedShift is better in several ways still.

https://redmine.pfsense.org/issues/14047

Steve

bingo600

@stephenw10

So "In plain english" , 23.05 has the 23.01 issue fixed.
And i should delete my "tunables", and give it a try ??
Correct ?

Should i enable PowerD , that i use to have enabled to activate the 23.05 speed/power adapt ?

Btw: The PR you listed above, has 23.09 as target

/Bingo

stephenw10

No, 23.05 behaves the same as 23.01 with regard to SpeedShift.

Enabling SpeedStep (powerd) does nothing unless you disable SpeedShift. You can do that by setting hint.hwpstate_intel.0.disabled="1".

Since SpeedShift is better that SpeedStep in every way except the default values (IMO). I recommend just setting the values as you have in both 23.01 and 23.05.

Steve

bingo600

He..he

I just deleted my SpeedShift entries , as i thought the fix were in 23.05.
I'm reentering and setting to 75, as when it ran on 23.01
And keep PowerD disabled.

Thnx

/Bingo

stephenw10

For reference I'm running those values at 80 on a test box I have here that supports SpeedShift.

bingo600

I seem to remember that 80 was the "recommended value" in our last round of SpeedStep settings.

But i like the way my Hystou/Protecli behaves on 75.

/Bingo

LDS

I have an Atom C3558, I'm now using pfSense 2.7 but the FreeBSD version is obviously the same. The CPU was running most of the time at 800MHz, now is mostly stuck at the top speed of 2.2GHz and of course runs hotter. I don't know if it's an Heisenberg situation - just having the Dashboard open to check the CPU speed runs the CPU faster.

I have tried to set dev.hwpstate_intel.X.epp to 80 (X from 0 to 3) but it does not help. I'm not sure if the C3558 has SpeedShift, Intel ARK doesn't say it, nor I can find it in the boot log.

stephenw10

C3K doesn't have Speed Shift. Without the dashboard open try running:

[23.05.1-RELEASE][admin@6100-3.stevew.lan]/root: sysctl dev.cpu.0
dev.cpu.0.temperature: 55.0C
dev.cpu.0.coretemp.throttle_log: 0
dev.cpu.0.coretemp.tjmax: 91.0C
dev.cpu.0.coretemp.resolution: 1
dev.cpu.0.coretemp.delta: 37
dev.cpu.0.cx_method: C1/mwait/hwc C2/mwait/hwc
dev.cpu.0.cx_usage_counters: 6940958 0
dev.cpu.0.cx_usage: 100.00% 0.00% last 20556us
dev.cpu.0.cx_lowest: C1
dev.cpu.0.cx_supported: C1/1/1 C2/2/50
dev.cpu.0.freq_levels: 2200/0 2100/0 2000/0 1900/0 1800/0 1700/0 1600/0 1500/0 1400/0 1300/0 1200/0 1100/0 1000/0 900/0 800/0
dev.cpu.0.freq: 800
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

Check the available freq levels and current freq shown.

Steve

dem

@LDS said in Issues with CPU frequency after upgrade 23.01:

I don't know if it's an Heisenberg situation - just having the Dashboard open to check the CPU speed runs the CPU faster.

I see this on my Protectli with a (non-Speed Shift?) J3160 with my busy Dashboard and powerd set to Hiadaptive. I never see the current CPU speed displayed at all on the Dashboard (since it's not displayed when at maximum), but if I leave the Dashboard and run sysctl dev.cpu.0.freq at the command line I can see the frequency change.

LDS

@stephenw10

Tried via SSH - looks locked at 2200MHz:

dev.cpu.0.temperature: 40.0C
dev.cpu.0.coretemp.throttle_log: 0
dev.cpu.0.coretemp.tjmax: 91.0C
dev.cpu.0.coretemp.resolution: 1
dev.cpu.0.coretemp.delta: 51
dev.cpu.0.cx_method: C1/mwait/hwc C2/mwait/hwc
dev.cpu.0.cx_usage_counters: 2960105 0
dev.cpu.0.cx_usage: 100.00% 0.00% last 4326us
dev.cpu.0.cx_lowest: C1
dev.cpu.0.cx_supported: C1/1/1 C2/2/50
dev.cpu.0.freq_levels: 2200/0 2100/0 2000/0 1900/0 1800/0 1700/0 1600/0 1500/0 1400/0 1300/0 1200/0 1100/0 1000/0 900/0 800/0
dev.cpu.0.freq: 2200
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

I'll try to disable SpeedShift and reactivate PowerD and see what happens.

SteveITS

@LDS said in Issues with CPU frequency after upgrade 23.01:

reactivate PowerD

PowerD works fine on the 6100 which is that CPU.

stephenw10

Yeah you need powerd active to get lower CPU frequencies.

LDS

@stephenw10

Setting hint.hwpstate_intel.0.disabled to 1 with PowerD returned to the old behaviour:

dev.cpu.0.temperature: 39.0C
dev.cpu.0.coretemp.throttle_log: 0
dev.cpu.0.coretemp.tjmax: 91.0C
dev.cpu.0.coretemp.resolution: 1
dev.cpu.0.coretemp.delta: 52
dev.cpu.0.cx_method: C1/mwait/hwc C2/mwait/hwc
dev.cpu.0.cx_usage_counters: 16653 0
dev.cpu.0.cx_usage: 100.00% 0.00% last 17244us
dev.cpu.0.cx_lowest: C1
dev.cpu.0.cx_supported: C1/1/1 C2/2/50
dev.cpu.0.freq_levels: 2200/0 2100/0 2000/0 1900/0 1800/0 1700/0 1600/0 1500/0 1400/0 1300/0 1200/0 1100/0 1000/0 900/0 800/0
dev.cpu.0.freq: 800
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

coxhaus

@bingo600

So, I added 4 cpu entries for my Intel i3-6100T as described here and seems to work well. My cpu drops down to 897MHz and temps are down to 30 degrees C. PowerD had no effect so I turned it off. I could not tell a difference between 75 and 80 in my low so I left it at 80. My low was never lower than 897MHz.