On 4/8/23 07:17, songbird wrote:
i have a program that has changed it's behavior to suddenly
become a CPU hog (while doing something simple like uploading
files for my website). probably a bug, but it got me to
wondering how i could limit the CPU temperature to a range
well below the maximum that kicks in by the CPU itself.
i have an intel processor and it has the MAX which does
prevent it from going higher (100C), but i'd like to keep it
at 70C or lower.
i've been trying to find anything that will let me set this
but no luck yet in my searches.
thanks! :)
songbird
Assuming the computer had a proper thermal solution when assembled, the
100 C processor temperature indicates that the thermal paste between the
processor and its heat sink has gone bad. I suggest replacing it with
silver-based thermal paste.
As for adjusting the processor with Debian and Linux, in the past I used:
cpufrequtils
cpufreq-info(1) prints information (Dell Precision 3630 with an Intel
Xeon E-2174G processor):
2023-04-08 15:52:47 root@taz ~
# cat /etc/debian_version ; uname -a
11.6
Linux taz 5.10.0-21-amd64 #1 SMP Debian 5.10.162-1 (2023-01-21) x86_64
GNU/Linux
2023-04-08 15:53:01 root@taz ~
# cpufreq-info --hwlimits
800000 4700000
2023-04-08 15:53:08 root@taz ~
# cpufreq-info --governors
performance powersave
2023-04-08 15:53:20 root@taz ~
# cpufreq-info --policy
800000 4700000 powersave
cpufreq-set(1) appears to make changes:
2023-04-08 16:15:20 root@taz ~
# cpufreq-set -r --max 2000000
2023-04-08 16:15:54 root@taz ~
# cpufreq-info --policy
800000 2000000 powersave
But, benchmarking before and after shows no effect (?).
STFW:
https://wiki.debian.org/CpuFrequencyScaling
cpufreq is being replaced by cpupower.
Install the cpupower package and try it:
2023-04-08 17:04:29 root@taz ~
# apt-get install linux-cpupower
<snip>
2023-04-08 17:09:31 root@taz ~
# cpupower frequency-info
analyzing CPU 0:
driver: intel_pstate
CPUs which run at the same hardware frequency: 0
CPUs which need to have their frequency coordinated by software: 0
maximum transition latency: Cannot determine or is not supported.
hardware limits: 800 MHz - 4.70 GHz
available cpufreq governors: performance powersave
current policy: frequency should be within 800 MHz and 2.00 GHz.
The governor "powersave" may decide which speed to use
within this range.
current CPU frequency: Unable to call hardware
current CPU frequency: 828 MHz (asserted by call to kernel)
boost state support:
Supported: yes
Active: yes
2023-04-08 17:10:46 root@taz ~
# cpupower frequency-set --max 2000000
Setting cpu: 0
Setting cpu: 1
Setting cpu: 2
Setting cpu: 3
Setting cpu: 4
Setting cpu: 5
Setting cpu: 6
Setting cpu: 7
Benchmark -- now it runs slower and cooler.
David
