CPU temperature 94 degrees Celsius!

Optimize your system for ultimate performance.

Moderators: MattKingUSA, khz

Post Reply
User avatar
TAERSH
Established Member
Posts: 455
Joined: Mon Feb 03, 2020 6:48 pm
Has thanked: 27 times
Been thanked: 21 times

CPU temperature 94 degrees Celsius!

Post by TAERSH »

Hi.

Somewhere on this forum, there was a post (related to XRuns) of a member showing some additional parameters at the kernel line. So, I added to my kernel line:

Code: Select all

idle=poll processor.max_cstate=1
After doing a reboot the CPU temperature jumps immediately to 94 degrees Celsius. :shock: :?
After removing these parameters and rebooting I'm back at 37 to 41 degrees Celsius. 8)

What has happened?
merlyn
Established Member
Posts: 1392
Joined: Thu Oct 11, 2018 4:13 pm
Has thanked: 168 times
Been thanked: 247 times

Re: CPU temperature 94 degrees Celsius!

Post by merlyn »

Yes, that's too hot. 90 degrees C is about the limit. It was me who posted that so my apologies for overheating your processor.

I'm running a desktop and my processor idles at ~40 degrees C with those kernel parameters. Under extreme load it goes up to ~74 degrees C so it's OK for my system. An audio load has never got it to 74 degrees, I used stress to max out the processor.

So thanks for flagging that up. The message seems to be use those kernel parameters with caution!
User avatar
sunrat
Established Member
Posts: 915
Joined: Wed Jul 22, 2020 2:08 pm
Has thanked: 151 times
Been thanked: 242 times

Re: CPU temperature 94 degrees Celsius!

Post by sunrat »

Try just enabling one of those parameters at a time to determine which one is causing the heat. My Intel i5 6500 idles around 35℃ and when maxed out with video encoding sits on about 60℃. Kernel parameters are:

Code: Select all

"quiet intel_idle.max_cstate=0 processor.max_cstate=1 threadirqs"
tramp
Established Member
Posts: 2335
Joined: Mon Jul 01, 2013 8:13 am
Has thanked: 9 times
Been thanked: 454 times

Re: CPU temperature 94 degrees Celsius!

Post by tramp »

sunrat wrote: Sun May 09, 2021 9:34 am Try just enabling one of those parameters at a time to determine which one is causing the heat. My Intel i5 6500 idles around 35℃ and when maxed out with video encoding sits on about 60℃. Kernel parameters are:

Code: Select all

"quiet intel_idle.max_cstate=0 processor.max_cstate=1 threadirqs"
Yea, that's nearly what I use as well for my Intel i5-7400 (Quad Core).

Code: Select all

intel_idle.max_cstate=0
is disabling the Intel Idle driver.
Additional I use as well

Code: Select all

intel_pstate=disable idle=poll
On the road again.
User avatar
d.healey
Established Member
Posts: 610
Joined: Fri Sep 22, 2017 8:33 pm
Has thanked: 274 times
Been thanked: 100 times

Re: CPU temperature 94 degrees Celsius!

Post by d.healey »

What does this do?

Code: Select all

processor.max_cstate=1 
David Healey
YouTube - Free HISE scripting and sample library dev tutorials
Libre Wave - Freedom respecting instruments and effects.
User avatar
sunrat
Established Member
Posts: 915
Joined: Wed Jul 22, 2020 2:08 pm
Has thanked: 151 times
Been thanked: 242 times

Re: CPU temperature 94 degrees Celsius!

Post by sunrat »

d.healey wrote: Sun May 09, 2021 12:49 pm What does this do?

Code: Select all

processor.max_cstate=1 
From https://access.redhat.com/articles/65410 :
A system may be prevented from entering power-saving states by booting with the processor.max_cstates=1 command line option. Additionally, the idle=poll option may be added for the fastest time out of the idle state. Unfortunately both of these options tend to cause power usage to spike.
The rest of that article is also quite interesting, perhaps the comments as well.

I use the Liquorix kernel which has CONFIG_CPU_FREQ_DEFAULT_GOV_PERFORMANCE=y set in it's config which may confuse the issue too. So much varied advice on the net, what can a poor boy do? :? :mrgreen:

Edit (a bit later) - this thread got my wondering why I still had variable CPU frequency. A bit more tweaking and I found in UEFI setup by disabling "CPU EnhancedHalt (C1E)" the frequency would stay fixed, so perhaps the kernel parameters are not the full monty. Curiosity was piqued by a comment in that RedHat article. Ran xruncounter and got "first Xrun happen at DSP load 99.51%". Seems acceptable. 8) A quick run of a Mixbus 32C mix seemed happy.
Sorry to hijack your topic TAERSH but maybe some of this discussion will lead to a fix for your heating.
User avatar
bluebell
Established Member
Posts: 1909
Joined: Sat Sep 15, 2012 11:44 am
Location: Saarland, Germany
Has thanked: 111 times
Been thanked: 116 times

Re: CPU temperature 94 degrees Celsius!

Post by bluebell »

TAERSH wrote: Sun May 09, 2021 3:46 am Hi.

Somewhere on this forum, there was a post (related to XRuns) of a member showing some additional parameters at the kernel line. So, I added to my kernel line:

Code: Select all

idle=poll processor.max_cstate=1
After doing a reboot the CPU temperature jumps immediately to 94 degrees Celsius. :shock: :?
After removing these parameters and rebooting I'm back at 37 to 41 degrees Celsius. 8)

What has happened?
idle=poll prevents the CPU from entering power saving states. That's probably the main cause for the hight temperature without giving you more performance.

Linux – MOTU UltraLite AVB – Qtractor – http://suedwestlicht.saar.de/

Post Reply