linux-kernel - Re: [PATCH] cpufreq, intel_pstate, set max_sysfs_pct and min_sysfs

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Message-ID: <56153E55.3060306@redhat.com>
Date:	Wed, 07 Oct 2015 11:46:29 -0400
From:	Prarit Bhargava <prarit@...hat.com>
To:	Doug Smythies <dsmythies@...us.net>
CC:	"'Kristen Carlson Accardi'" <kristen@...ux.intel.com>,
	linux-kernel@...r.kernel.org,
	"'Viresh Kumar'" <viresh.kumar@...aro.org>,
	linux-pm@...r.kernel.org, "'Rafael J. Wysocki'" <rjw@...ysocki.net>
Subject: Re: [PATCH] cpufreq, intel_pstate, set max_sysfs_pct and min_sysfs_pct
 on governor switch



On 10/07/2015 11:40 AM, Doug Smythies wrote:
> 
> Do we agree or disagree that the root issue seems to be (from your test)?:
> 
> \#  echo 100 > /sys/devices/system/cpu/intel_pstate/min_perf_pct
> 
> [   21.483436] store_min_perf_pct[453] min_sysfs_pct = 100
> [   21.489373] store_min_perf_pct[456] min_perf_pct = 100
> [   21.495203] store_min_perf_pct[459] min_perf_pct = 100
> [   21.501050] store_min_perf_pct[462] min_perf_pct = 100

Yep, and it appears to be done by default in Fedora & RHEL :/ ... the issue is
still the same IMO that min_sysfs_pct & max_sysfs_pct are not cleared on a
governor switch.

P.
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