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From: Qais Yousef <qais.yousef@arm.com>
To: Doug Smythies <dsmythies@telus.net>
Cc: 'Giovanni Gherdovich' <ggherdovich@suse.cz>,
	x86@kernel.org, linux-pm@vger.kernel.org,
	linux-kernel@vger.kernel.org,
	'Mel Gorman' <mgorman@techsingularity.net>,
	'Matt Fleming' <matt@codeblueprint.co.uk>,
	'Viresh Kumar' <viresh.kumar@linaro.org>,
	'Juri Lelli' <juri.lelli@redhat.com>,
	'Paul Turner' <pjt@google.com>,
	'Peter Zijlstra' <peterz@infradead.org>,
	'Vincent Guittot' <vincent.guittot@linaro.org>,
	'Quentin Perret' <qperret@qperret.net>,
	'Dietmar Eggemann' <dietmar.eggemann@arm.com>,
	'Srinivas Pandruvada' <srinivas.pandruvada@linux.intel.com>,
	'Thomas Gleixner' <tglx@linutronix.de>,
	'Ingo Molnar' <mingo@redhat.com>, 'Borislav Petkov' <bp@suse.de>,
	'Len Brown' <lenb@kernel.org>,
	"'Rafael J . Wysocki'" <rjw@rjwysocki.net>
Subject: Re: [PATCH v4 1/6] x86,sched: Add support for frequency invariance
Date: Thu, 19 Dec 2019 10:48:14 +0000
Message-ID: <20191219104813.6fr34qavpaplecoz@e107158-lin> (raw)
In-Reply-To: <003d01d5a63d$f6ab3950$e401abf0$@net>

Hi Doug

On 11/28/19 14:48, Doug Smythies wrote:
> Summary: There never was an issue here.
> 
> Sorry for the noise of this thread, and the resulting waste of time.
> 
> On 2019.11.26 23:33 Doug Smythies wrote:
> > On 2019.11.26 07:20 Giovanni Gherdovich wrote:
> >> On Mon, 2019-11-25 at 21:59 -0800, Doug Smythies wrote:
> >>> [...]
> >>> The issue with the schedutil governor not working properly in the 5.4 RC series
> >>> appears to be hardware dependant.
> 
> No it 's not.
> 
> Issues with my Sandy Bridge, i7-2600K, test computer and kernel 5.4
> seem to be because it is running an older Ubuntu server version,
> apparently somewhat dependant on cgroup V1 and their cgmanager package.
> I am unable to remove the package to test further because I do use VMs
> that seem to depend on it.
> 
> In the kernel configuration when CONFIG_UCLAMP_TASK_GROUP=y
> the computer behaves as though the new parameter "cpu.uclamp.min"
> is set to max rather than 0, but I can not prove it.

I just noticed this. This option shouldn't cause any problem, if it does there
might be a bug that we need to fix.

So cpu.uclamp.min reads 0 but you think it's not taking effect, correct?

In the quotes above I see 5.4 RC, if you haven't tried this against the final
5.4 release, do you mind trying to see if you can reproduce? Trying 5.5-rc2
would be helpful too if 5.4 fails.

Thanks

--
Qais Yousef

  reply index

Thread overview: 35+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-11-13 12:46 [PATCH v4 0/6] Add support for frequency invariance for (some) x86 Giovanni Gherdovich
2019-11-13 12:46 ` [PATCH v4 1/6] x86,sched: Add support for frequency invariance Giovanni Gherdovich
2019-11-24  7:49   ` Doug Smythies
2019-11-25  8:16     ` Doug Smythies
2019-11-25  9:16     ` Mel Gorman
2019-11-25 16:06     ` Giovanni Gherdovich
2019-11-26  5:59       ` Doug Smythies
2019-11-26 15:20         ` Giovanni Gherdovich
2019-11-27  7:32           ` Doug Smythies
2019-11-28 22:48             ` Doug Smythies
2019-12-19 10:48               ` Qais Yousef [this message]
2019-12-23  7:47                 ` Doug Smythies
2019-12-23 14:07                   ` Qais Yousef
2019-12-23 14:40                     ` Qais Yousef
2019-12-23 16:34                       ` Doug Smythies
2019-12-23 19:10                         ` Qais Yousef
2019-12-24  1:16                           ` Doug Smythies
2019-12-24 11:08                             ` Qais Yousef
2019-12-02 16:34   ` Ionela Voinescu
2019-12-06 11:57     ` Giovanni Gherdovich
2019-12-18 19:34       ` Peter Zijlstra
2019-12-19 20:27         ` Giovanni Gherdovich
2019-11-13 12:46 ` [PATCH v4 2/6] x86,sched: Add support for frequency invariance on SKYLAKE_X Giovanni Gherdovich
2019-12-18 20:06   ` Peter Zijlstra
2019-12-19 20:29     ` Giovanni Gherdovich
2019-11-13 12:46 ` [PATCH v4 3/6] x86,sched: Add support for frequency invariance on XEON_PHI_KNL/KNM Giovanni Gherdovich
2019-12-18 20:22   ` Peter Zijlstra
2019-12-19 20:32     ` Giovanni Gherdovich
2019-11-13 12:46 ` [PATCH v4 4/6] x86,sched: Add support for frequency invariance on ATOM_GOLDMONT* Giovanni Gherdovich
2019-11-13 12:46 ` [PATCH v4 5/6] x86,sched: Add support for frequency invariance on ATOM Giovanni Gherdovich
2019-11-13 16:50   ` Srinivas Pandruvada
2019-11-15 10:34     ` Giovanni Gherdovich
2019-11-13 12:46 ` [PATCH v4 6/6] x86: intel_pstate: handle runtime turbo disablement/enablement in freq. invariance Giovanni Gherdovich
2019-12-18 20:37 ` [PATCH v4 0/6] Add support for frequency invariance for (some) x86 Peter Zijlstra
2019-12-19 20:33   ` Giovanni Gherdovich

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