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Date: Fri, 28 Jul 2023 08:31:12 +0700
From: Bagas Sanjaya <bagasdotme@...il.com>
To: Amit Daniel Kachhap <amit.kachhap@...il.com>,
Daniel Lezcano <daniel.lezcano@...aro.org>,
Viresh Kumar <viresh.kumar@...aro.org>,
Goran <goran.brkuljan@...il.com>
Cc: Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
Linux Regressions <regressions@...ts.linux.dev>,
Linux Power Management <linux-pm@...r.kernel.org>
Subject: Re: Fwd: XPS 17 9730 runs significantly warmer on Kernel 6.5-rc3
compared to Kernel 6.4.3
On Thu, Jul 27, 2023 at 09:25:19PM +0700, Bagas Sanjaya wrote:
> Hi,
>
> I notice a regression report on Bugzilla [1]. Quoting from it:
>
> > On my new XPS 17 9730 laptop, I recently installed the Kernel 6.5-rc3. I noticed, however, that during its operation, the laptop was getting significantly warmer than before. I did some analysis using the 'stress' tool to measure and compare the difference in CPU temperatures between Kernel 6.4.3 and Kernel 6.5-rc3. Here are my results:
> >
> > OS: Ubuntu 23.10
> > CPU: i7-13700H
> >
> > kernel 6.4.3:
> >
> > Initial CPU temperature:
> > coretemp-isa-0000
> > Core 0: +47.0°C (high = +100.0°C, crit = +100.0°C)
> > Core 4: +45.0°C (high = +100.0°C, crit = +100.0°C)
> > Core 8: +46.0°C (high = +100.0°C, crit = +100.0°C)
> > Core 12: +46.0°C (high = +100.0°C, crit = +100.0°C)
> > Core 16: +45.0°C (high = +100.0°C, crit = +100.0°C)
> > Core 20: +44.0°C (high = +100.0°C, crit = +100.0°C)
> > Core 24: +44.0°C (high = +100.0°C, crit = +100.0°C)
> > Core 25: +44.0°C (high = +100.0°C, crit = +100.0°C)
> > Core 26: +44.0°C (high = +100.0°C, crit = +100.0°C)
> > Core 27: +44.0°C (high = +100.0°C, crit = +100.0°C)
> > Core 28: +45.0°C (high = +100.0°C, crit = +100.0°C)
> > Core 29: +45.0°C (high = +100.0°C, crit = +100.0°C)
> > Core 30: +45.0°C (high = +100.0°C, crit = +100.0°C)
> > Core 31: +45.0°C (high = +100.0°C, crit = +100.0°C)
> > Stressing CPU for 30 seconds...
> > stress: info: [4858] dispatching hogs: 14 cpu, 0 io, 0 vm, 0 hdd
> > stress: info: [4858] successful run completed in 30s
> > CPU temperature immediately after stress test:
> > coretemp-isa-0000
> > Core 0: +67.0°C (high = +100.0°C, crit = +100.0°C)
> > Core 4: +76.0°C (high = +100.0°C, crit = +100.0°C)
> > Core 8: +69.0°C (high = +100.0°C, crit = +100.0°C)
> > Core 12: +77.0°C (high = +100.0°C, crit = +100.0°C)
> > Core 16: +69.0°C (high = +100.0°C, crit = +100.0°C)
> > Core 20: +76.0°C (high = +100.0°C, crit = +100.0°C)
> > Core 24: +68.0°C (high = +100.0°C, crit = +100.0°C)
> > Core 25: +68.0°C (high = +100.0°C, crit = +100.0°C)
> > Core 26: +68.0°C (high = +100.0°C, crit = +100.0°C)
> > Core 27: +68.0°C (high = +100.0°C, crit = +100.0°C)
> > Core 28: +71.0°C (high = +100.0°C, crit = +100.0°C)
> > Core 29: +71.0°C (high = +100.0°C, crit = +100.0°C)
> > Core 30: +71.0°C (high = +100.0°C, crit = +100.0°C)
> > Core 31: +71.0°C (high = +100.0°C, crit = +100.0°C)
> > Test ended at: Tue Jul 25 01:10:16 PM CEST 2023
> >
> >
> > kernel 6.5-rc-3:
> >
> > Initial CPU temperature:
> > coretemp-isa-0000
> > Core 0: +46.0°C (high = +100.0°C, crit = +100.0°C)
> > Core 4: +46.0°C (high = +100.0°C, crit = +100.0°C)
> > Core 8: +46.0°C (high = +100.0°C, crit = +100.0°C)
> > Core 12: +46.0°C (high = +100.0°C, crit = +100.0°C)
> > Core 16: +44.0°C (high = +100.0°C, crit = +100.0°C)
> > Core 20: +44.0°C (high = +100.0°C, crit = +100.0°C)
> > Core 24: +45.0°C (high = +100.0°C, crit = +100.0°C)
> > Core 25: +45.0°C (high = +100.0°C, crit = +100.0°C)
> > Core 26: +45.0°C (high = +100.0°C, crit = +100.0°C)
> > Core 27: +45.0°C (high = +100.0°C, crit = +100.0°C)
> > Core 28: +45.0°C (high = +100.0°C, crit = +100.0°C)
> > Core 29: +45.0°C (high = +100.0°C, crit = +100.0°C)
> > Core 30: +45.0°C (high = +100.0°C, crit = +100.0°C)
> > Core 31: +45.0°C (high = +100.0°C, crit = +100.0°C)
> > Stressing CPU for 30 seconds...
> > stress: info: [11146] dispatching hogs: 14 cpu, 0 io, 0 vm, 0 hdd
> > stress: info: [11146] successful run completed in 30s
> > CPU temperature immediately after stress test:
> > coretemp-isa-0000
> > Core 0: +84.0°C (high = +100.0°C, crit = +100.0°C)
> > Core 4: +97.0°C (high = +100.0°C, crit = +100.0°C)
> > Core 8: +87.0°C (high = +100.0°C, crit = +100.0°C)
> > Core 12: +100.0°C (high = +100.0°C, crit = +100.0°C)
> > Core 16: +86.0°C (high = +100.0°C, crit = +100.0°C)
> > Core 20: +99.0°C (high = +100.0°C, crit = +100.0°C)
> > Core 24: +83.0°C (high = +100.0°C, crit = +100.0°C)
> > Core 25: +83.0°C (high = +100.0°C, crit = +100.0°C)
> > Core 26: +83.0°C (high = +100.0°C, crit = +100.0°C)
> > Core 27: +83.0°C (high = +100.0°C, crit = +100.0°C)
> > Core 28: +89.0°C (high = +100.0°C, crit = +100.0°C)
> > Core 29: +89.0°C (high = +100.0°C, crit = +100.0°C)
> > Core 30: +89.0°C (high = +100.0°C, crit = +100.0°C)
> > Core 31: +89.0°C (high = +100.0°C, crit = +100.0°C)
> > Test ended at: Tue Jul 25 01:05:42 PM CEST 2023
> >
> > I tested few times with different setup and CPU temp on 6.5-rc3 is always higher especially when stressing with fewer cores.
>
> See Bugzilla for the full thread.
>
> Goran: On Tuesday, I asked you to perform bisection. Any update on it?
>
> Anyway, I'm adding this regression to regzbot:
>
> #regzbot introduced: v6.4..v6.5-rc3 https://bugzilla.kernel.org/show_bug.cgi?id=217703
> #regzbot title: significant temperature increase on XPS 17 9730
>
> Thanks.
>
> [1]: https://bugzilla.kernel.org/show_bug.cgi?id=217703
>
Oops, I accidentally duped this. My email client was stuck sending it
(but got delivered anyway), thus:
#regzbot dup-of: https://lore.kernel.org/regressions/107f05b8-0104-501c-130c-4f89f3f8a628@gmail.com/
--
An old man doll... just what I always wanted! - Clara
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