4 Sep
2020
4 Sep
'20
8:55 a.m.
On 9/2/20 2:40 AM, Roger wrote:
On 2/9/20 9:53 pm, Edgar Aichinger wrote:
Pretty much all modern processors (especially Intel ones) have built-in
stuff to keep them from overheating. I think the old days of setting the
processor to run at max clock are pretty much gone. Unless you're
liquid-cooling in a desktop case with really good case ventilation.
The i9 in my laptop can nominally hit 5GHz. Best I've done so far - with
an intensely-multiprocessing application - hit 4.6GHz. I think it also
hit 200F deg, too.
--
David W. Jones
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Am Mittwoch, 2. September 2020, 07:18:39 CEST
schrieb david:
That's good info. I've noticed performance governor doesn't fix the
cpu to max frequency like it used to but varies a little eg.
2.8-3.17GHz on my nominal 3.16GHz cpu. Still doesn't decrease right
down as it does with ondemand governor. Scaling driver is still
acpi-cpufreq though. I don't remember what I did on my old i7 to
keep it on performance. One
involved having to push the performance setting to EACH CPU/thread, I
think that's covered on that link somewhere. May have been a script. I
don't remember how I did it, but it stuck between boots. I think I
actually tried three different things, so I really don't know which one
did the trick.
As far as I remember for SysV intit systems the way to make the
scaling governor persistent across reboots was to put a command into
/etc/init.d/boot.local or some other boot init script. The command
would vary with distros, whether they used cpufreq-utils or the newer
cpupower suite for this. For cpupower, the command would be
"/usr/bin/cpupower -c all frequency-set -g performance".
Systems using systemd would accordingly need a service file added as
/etc/systemd/system/cpupower.service, and possibly enabled before it
would be run at every boot. I post mine, which I remember having
created myself, but I don't remember where I got it from. Anyway this
works well for me:
----
[Unit]
Description=CPU powersave
[Service]
Type=oneshot
ExecStart=/usr/bin/cpupower -c all frequency-set -g performance
[Install]
WantedBy=multi-user.target
----