linux-kernel - Re: [PATCH mvebu v2 00/10] Armada 37xx: Fix cpufreq changing base CPU speed to 800 MHz from 1000 MHz

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Message-ID: <20210210002619.43104a9b@kernel.org>
Date:   Wed, 10 Feb 2021 00:26:19 +0100
From:   Marek Behún <kabel@...nel.org>
To:     nnet <nnet@...tmail.fm>
Cc:     Pali Rohár <pali@...nel.org>, a.heider@...il.com,
        andrew@...n.ch, gerald@....net, gregory.clement@...tlin.com,
        kostap@...vell.com, linux-arm-kernel@...ts.infradead.org,
        linux-clk@...r.kernel.org, linux-kernel@...r.kernel.org,
        luka.perkov@...tura.hr, miquel.raynal@...tlin.com,
        mturquette@...libre.com, rmk+kernel@...linux.org.uk,
        sboyd@...nel.org, tmn505@...il.com, vladimir.vid@...tura.hr
Subject: Re: [PATCH mvebu v2 00/10] Armada 37xx: Fix cpufreq changing base
 CPU speed to 800 MHz from 1000 MHz

On Tue, 09 Feb 2021 15:16:45 -0800
nnet <nnet@...tmail.fm> wrote:

> I've two of these and I've just swapped them (and re-pasted the heat sinks).
> 
> The second one ran under load for awhile and now has frozen as well.
> 
> Under a moderate load `wget -O /dev/null <large.bin>` @X00Mbits they are fine.
> 
> Under a 1 min speed test of load ~200Mbits routed WireGuard they freeze.
> 
> They fine with both those workloads @1000_800.
> 
> Perhaps it's heat? Unfortunately I don't have any numbers on that ATM.

Try disabling cpufreq in kernel completely, compile boot image at
1200 MHz. If it continues freezing, then I fear we can't help you with
1200 MHz :(

Marek