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Re: fftwf tests running for 25+ hours - is this normal?
From: |
Bengt Richter |
Subject: |
Re: fftwf tests running for 25+ hours - is this normal? |
Date: |
Tue, 15 Oct 2019 22:11:50 -0700 |
User-agent: |
Mutt/1.12.1 (2019-06-15) |
On +2019-10-15 11:32:38 -0700, Chris Marusich wrote:
> Hi Bengt and Matteo,
>
> Bengt Richter <address@hidden> writes:
>
> > Have you checked sensors for overheating that might induce CPU clock
> > throttling?
>
> Actually, yes, I happened to be watching dmesg output at the time, and I
> did notice these messages (no similar messages have been printed since
> then, which was many hours ago):
>
> --8<---------------cut here---------------start------------->8---
> [180270.045081] mce: CPU1: Core temperature above threshold, cpu clock
> throttled (total events = 124733)
> [180270.045567] mce: CPU1: Core temperature/speed normal
> [180570.044352] mce: CPU1: Core temperature above threshold, cpu clock
> throttled (total events = 134902)
> [180570.044838] mce: CPU1: Core temperature/speed normal
> [180875.663432] mce: CPU1: Core temperature above threshold, cpu clock
> throttled (total events = 143897)
> [180875.663918] mce: CPU1: Core temperature/speed normal
> [181175.748616] mce: CPU1: Core temperature above threshold, cpu clock
> throttled (total events = 153503)
> [181175.749103] mce: CPU1: Core temperature/speed normal
> [181476.496915] mce: CPU1: Core temperature above threshold, cpu clock
> throttled (total events = 171377)
> [181476.497401] mce: CPU1: Core temperature/speed normal
> [181776.914264] mce: CPU1: Core temperature above threshold, cpu clock
> throttled (total events = 185828)
> [181776.914751] mce: CPU1: Core temperature/speed normal
> [182076.914391] mce: CPU1: Core temperature/speed normal
> [182377.322112] mce: CPU1: Core temperature above threshold, cpu clock
> throttled (total events = 231578)
> [182377.322598] mce: CPU1: Core temperature/speed normal
> --8<---------------cut here---------------end--------------->8---
>
> Is this throttling permanent, or is the throttling released after the
> temperature returns to normal?
In my case, throttling ceased as soon as temps normalized.
If it happens to me again, I will try
lscpu|grep -i '^CPU m'
to see if the throttling is shown in the first number
which right now gets me:
CPU MHz: 2697.781
CPU max MHz: 3500.0000
CPU min MHz: 800.0000
again:
CPU MHz: 2102.444
CPU max MHz: 3500.0000
CPU min MHz: 800.0000
Yeah, so that first number is a current sample.
So I guess 800 could make something run 3x or more longer.
... Hm. I think I am going to see about dust-bunnies in the air ducts :) ...
--
Regards,
Bengt Richter
Re: fftwf tests running for 25+ hours - is this normal?, Matteo Frigo, 2019/10/15