From: "Doug Smythies" <dsmythies@telus.net>
To: "'Srinivas Pandruvada'" <srinivas.pandruvada@linux.intel.com>,
"'Larry Finger'" <Larry.Finger@lwfinger.net>,
"'Rafael J. Wysocki'" <rafael@kernel.org>
Cc: "'Rafael J. Wysocki'" <rjw@rjwysocki.net>,
"'LKML'" <linux-kernel@vger.kernel.org>,
"'Linux PM list'" <linux-pm@vger.kernel.org>
Subject: RE: Regression in 4.8 - CPU speed set very low
Date: Mon, 26 Sep 2016 20:12:38 -0700 [thread overview]
Message-ID: <003001d2186d$02c34820$0849d860$@net> (raw)
In-Reply-To: ohH4bKxaUa8e7ohH5blnhh
On 2016.09.26 18:31 Srinivas Pandruvada wrote:
> On Mon, 2016-09-26 at 19:48 -0500, Larry Finger wrote:
>> On 09/26/2016 07:21 PM, Rafael J. Wysocki wrote:
>>> On Tue, Sep 27, 2016 at 1:53 AM, Larry Finger wrote:
>>> But for both we need a reproducer anyway.
>> I do not have a reliable reproducer. The condition has always
>> happened when
>> running a high-compute job such as a 'make -j8' on the kernel, or
>> building the
>> RPM for openSUSE's implementation of VirtualBox. The latter is what
>> I'm using
>> for most of my testing.
Run some CPU stressor and get all your CPU's going at 100% load.
And watch your core temperatures while you do so.
>
>>> It also would be good to rule out the thermal throttling (as per
>>> the Srinivas' comments).
It is almost certainly thermal throttling, or similar causing
Clock modulation, of it seems 50%.
>>>
>>> For now, please tell me what's in
>>> /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_min_freq
>> 800000
> Your effective freq is lower than 800MHz. One of the possible reason is
> thermal throttling.
>
> What distro you are using?
And what make and model of LapTop?
next prev parent reply other threads:[~2016-09-27 3:12 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-09-09 17:39 Regression in 4.8 - CPU speed set very low Larry Finger
2016-09-14 16:00 ` Larry Finger
2016-09-19 2:54 ` Larry Finger
2016-09-24 2:45 ` Larry Finger
2016-09-26 11:37 ` Rafael J. Wysocki
2016-09-26 16:15 ` Larry Finger
2016-09-26 21:06 ` Rafael J. Wysocki
2016-09-26 21:26 ` Srinivas Pandruvada
2016-09-26 21:30 ` Rafael J. Wysocki
2016-09-26 21:41 ` Srinivas Pandruvada
2016-09-26 21:46 ` Rafael J. Wysocki
2016-09-26 21:28 ` Larry Finger
2016-09-26 21:37 ` Rafael J. Wysocki
2016-09-26 21:46 ` Srinivas Pandruvada
2016-09-26 22:15 ` Larry Finger
2016-09-26 22:09 ` Larry Finger
2016-09-26 22:16 ` Rafael J. Wysocki
2016-09-26 23:53 ` Larry Finger
2016-09-27 0:21 ` Rafael J. Wysocki
2016-09-27 0:48 ` Larry Finger
2016-09-27 1:30 ` Srinivas Pandruvada
2016-09-27 2:53 ` Larry Finger
2016-09-27 3:12 ` Doug Smythies [this message]
2016-09-27 8:48 ` Larry Finger
2016-09-27 11:46 ` Rafael J. Wysocki
2016-09-29 2:22 ` Larry Finger
2016-09-29 12:19 ` Rafael J. Wysocki
2016-09-29 15:09 ` Larry Finger
2016-09-29 15:56 ` Srinivas Pandruvada
2016-09-29 16:24 ` Larry Finger
2016-09-29 20:52 ` Rafael J. Wysocki
2016-09-30 21:52 ` Larry Finger
2016-09-27 14:51 ` Lennart Sorensen
2016-09-29 2:26 ` Larry Finger
2016-09-29 14:17 ` Lennart Sorensen
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