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From: "Rafael J. Wysocki" <rafael@kernel.org>
To: Rong Chen <rong.a.chen@intel.com>
Cc: "Rafael J. Wysocki" <rafael.j.wysocki@intel.com>,
	LKML <linux-kernel@vger.kernel.org>,
	ACPI Devel Maling List <linux-acpi@vger.kernel.org>,
	"open list:ACPI COMPONENT ARCHITECTURE (ACPICA)"
	<devel@acpica.org>, Linux PM <linux-pm@vger.kernel.org>,
	lkp@lists.01.org, Rafael Wysocki <rafael@kernel.org>
Subject: Re: [cpufreq] 909c0e9cc1: fwq.fwq.med 210.0% improvement
Date: Thu, 5 Mar 2020 10:05:48 +0100	[thread overview]
Message-ID: <CAJZ5v0g2vzYQ04GyrpubLx2+B0O4SDbqoTDCvhnSyaj1j1xswA@mail.gmail.com> (raw)
In-Reply-To: <cbe4887c-d54a-c4aa-e4bf-981b5fcc291d@intel.com>

On Thu, Mar 5, 2020 at 9:18 AM Rong Chen <rong.a.chen@intel.com> wrote:
>
>
>
> On 3/5/20 3:50 PM, Rafael J. Wysocki wrote:
> > On 3/5/2020 2:35 AM, kernel test robot wrote:
> >> Greeting,
> >>
> >> FYI, we noticed a 210.0% improvement of fwq.fwq.med due to commit:
> >
> > Well, that sounds impressive. :-)
> >
> >
> >>
> >> commit: 909c0e9cc11ba39fa5a660583b25c2431cf54deb ("cpufreq:
> >> intel_pstate: Use passive mode by default without HWP")
> >> https://git.kernel.org/cgit/linux/kernel/git/rafael/linux-pm.git
> >> intel_pstate-passive
> >>
> >> in testcase: fwq
> >> on test machine: 16 threads Intel(R) Xeon(R) CPU D-1541 @ 2.10GHz
> >> with 48G memory
> >> with following parameters:
> >>
> >>     nr_task: 100%
> >>     samples: 100000ss
> >>     iterations: 18x
> >>     cpufreq_governor: powersave
> >
> > The governor should be schedutil, though, unless it is explicitly set
> > to powersave in the test environment.
> >
> > Is that the case?
> >
> >
>
> Hi Rafael,
>
> Yes, we set to powersave for this test.

I wonder why this is done?  Is there any particular technical reason
for doing that?

  reply	other threads:[~2020-03-05  9:06 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-03-05  1:35 [cpufreq] 909c0e9cc1: fwq.fwq.med 210.0% improvement kernel test robot
2020-03-05  7:50 ` Rafael J. Wysocki
2020-03-05  8:18   ` Rong Chen
2020-03-05  9:05     ` Rafael J. Wysocki [this message]
2020-03-06  3:29       ` [LKP] " Huang, Ying
2020-03-06  9:54         ` Rafael J. Wysocki
2020-03-09  1:17           ` Huang, Ying
2020-03-10  8:45             ` Rafael J. Wysocki
2020-03-10  9:09               ` Huang, Ying

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