From: Viresh Kumar <viresh.kumar@linaro.org>
To: "Rafael J. Wysocki" <rjw@rjwysocki.net>
Cc: Linux PM list <linux-pm@vger.kernel.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Juri Lelli <juri.lelli@arm.com>
Subject: Re: [PATCH 6/9] cpufreq: governor: Reset sample delay in store_sampling_rate()
Date: Mon, 15 Feb 2016 14:23:32 +0530 [thread overview]
Message-ID: <20160215085332.GN6334@vireshk-i7> (raw)
In-Reply-To: <2770889.gQMC67V8WG@vostro.rjw.lan>
On 15-02-16, 02:20, Rafael J. Wysocki wrote:
> From: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
>
> If store_sampling_rate() updates the sample delay when the ondemand
> governor is in the middle of its high/low dance (OD_SUB_SAMPLE sample
> type is set), the governor will still do the bottom half of the
> previous sample which may take too much time.
>
> To prevent that from happening, change store_sampling_rate() to always
> reset the sample delay to 0 which also is consistent with the new
> behavior of cpufreq_governor_limits().
>
> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
> ---
> drivers/cpufreq/cpufreq_governor.c | 16 ++++------------
> 1 file changed, 4 insertions(+), 12 deletions(-)
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
--
viresh
next prev parent reply other threads:[~2016-02-15 8:53 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-02-15 1:08 [PATCH 0/9] cpufreq governor improvements Rafael J. Wysocki
2016-02-15 1:12 ` [PATCH 1/9] cpufreq: governor: Simplify gov_cancel_work() slightly Rafael J. Wysocki
2016-02-15 5:40 ` Viresh Kumar
2016-02-15 1:13 ` [PATCH 2/9] cpufreq: governor: Avoid atomic operations in hot paths Rafael J. Wysocki
2016-02-15 6:17 ` Viresh Kumar
2016-02-15 8:20 ` Viresh Kumar
2016-02-15 1:15 ` [PATCH 3/9] cpufreq: governor: Fix nice contribution computation in dbs_check_cpu() Rafael J. Wysocki
2016-02-15 8:29 ` Viresh Kumar
2016-02-15 1:18 ` [PATCH 4/9] cpufreq: governor: Clean up load-related computations Rafael J. Wysocki
2016-02-15 8:33 ` Viresh Kumar
2016-02-15 1:19 ` [PATCH 5/9] cpufreq: governor: Get rid of the ->gov_check_cpu callback Rafael J. Wysocki
2016-02-15 8:52 ` Viresh Kumar
2016-02-15 1:20 ` [PATCH 6/9] cpufreq: governor: Reset sample delay in store_sampling_rate() Rafael J. Wysocki
2016-02-15 8:53 ` Viresh Kumar [this message]
2016-02-15 1:20 ` [PATCH 7/9] cpufreq: governor: Move rate_mult to struct policy_dbs Rafael J. Wysocki
2016-02-15 8:56 ` Viresh Kumar
2016-02-15 1:21 ` [PATCH 8/9] cpufreq: ondemand: Simplify conditionals in od_dbs_timer() Rafael J. Wysocki
2016-02-15 8:57 ` Viresh Kumar
2016-02-15 1:22 ` [PATCH 9/9] cpufreq: governor: Use microseconds in sample delay computations Rafael J. Wysocki
2016-02-15 8:58 ` Viresh Kumar
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