From: Benjamin Gaignard <benjamin.gaignard@st.com> To: <rjw@rjwysocki.net>, <viresh.kumar@linaro.org>, <hugues.fruchet@st.com>, <mchehab@kernel.org>, <mcoquelin.stm32@gmail.com>, <alexandre.torgue@st.com>, <pavel@ucw.cz>, <len.brown@intel.com>, <valentin.schneider@arm.com>, <vincent.guittot@linaro.org> Cc: <linux-pm@vger.kernel.org>, <linux-kernel@vger.kernel.org>, <linux-media@vger.kernel.org>, <linux-stm32@st-md-mailman.stormreply.com>, <linux-arm-kernel@lists.infradead.org>, Benjamin Gaignard <benjamin.gaignard@st.com> Subject: [RFC 2/3] cpufreq: governor: Use minimum load QoS Date: Tue, 26 May 2020 17:16:18 +0200 [thread overview] Message-ID: <20200526151619.8779-3-benjamin.gaignard@st.com> (raw) In-Reply-To: <20200526151619.8779-1-benjamin.gaignard@st.com> Make sure that the returned load is above the system-wide minimum load QoS. Devices could set this specific QoS to inform governors about their need in terms of CPU load when computing it from idle time isn't accurate. Signed-off-by: Benjamin Gaignard <benjamin.gaignard@st.com> --- drivers/cpufreq/cpufreq_governor.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/cpufreq/cpufreq_governor.c b/drivers/cpufreq/cpufreq_governor.c index f99ae45efaea..1494e5e4c788 100644 --- a/drivers/cpufreq/cpufreq_governor.c +++ b/drivers/cpufreq/cpufreq_governor.c @@ -118,6 +118,7 @@ unsigned int dbs_update(struct cpufreq_policy *policy) unsigned int ignore_nice = dbs_data->ignore_nice_load; unsigned int max_load = 0, idle_periods = UINT_MAX; unsigned int sampling_rate, io_busy, j; + unsigned int qos_min_load; /* * Sometimes governors may use an additional multiplier to increase @@ -225,6 +226,10 @@ unsigned int dbs_update(struct cpufreq_policy *policy) policy_dbs->idle_periods = idle_periods; + qos_min_load = cpufreq_minload_qos_limit(); + if (qos_min_load > max_load) + max_load = qos_min_load; + return max_load; } EXPORT_SYMBOL_GPL(dbs_update); -- 2.15.0
WARNING: multiple messages have this Message-ID (diff)
From: Benjamin Gaignard <benjamin.gaignard@st.com> To: <rjw@rjwysocki.net>, <viresh.kumar@linaro.org>, <hugues.fruchet@st.com>, <mchehab@kernel.org>, <mcoquelin.stm32@gmail.com>, <alexandre.torgue@st.com>, <pavel@ucw.cz>, <len.brown@intel.com>, <valentin.schneider@arm.com>, <vincent.guittot@linaro.org> Cc: Benjamin Gaignard <benjamin.gaignard@st.com>, linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org, linux-stm32@st-md-mailman.stormreply.com, linux-arm-kernel@lists.infradead.org, linux-media@vger.kernel.org Subject: [RFC 2/3] cpufreq: governor: Use minimum load QoS Date: Tue, 26 May 2020 17:16:18 +0200 [thread overview] Message-ID: <20200526151619.8779-3-benjamin.gaignard@st.com> (raw) In-Reply-To: <20200526151619.8779-1-benjamin.gaignard@st.com> Make sure that the returned load is above the system-wide minimum load QoS. Devices could set this specific QoS to inform governors about their need in terms of CPU load when computing it from idle time isn't accurate. Signed-off-by: Benjamin Gaignard <benjamin.gaignard@st.com> --- drivers/cpufreq/cpufreq_governor.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/cpufreq/cpufreq_governor.c b/drivers/cpufreq/cpufreq_governor.c index f99ae45efaea..1494e5e4c788 100644 --- a/drivers/cpufreq/cpufreq_governor.c +++ b/drivers/cpufreq/cpufreq_governor.c @@ -118,6 +118,7 @@ unsigned int dbs_update(struct cpufreq_policy *policy) unsigned int ignore_nice = dbs_data->ignore_nice_load; unsigned int max_load = 0, idle_periods = UINT_MAX; unsigned int sampling_rate, io_busy, j; + unsigned int qos_min_load; /* * Sometimes governors may use an additional multiplier to increase @@ -225,6 +226,10 @@ unsigned int dbs_update(struct cpufreq_policy *policy) policy_dbs->idle_periods = idle_periods; + qos_min_load = cpufreq_minload_qos_limit(); + if (qos_min_load > max_load) + max_load = qos_min_load; + return max_load; } EXPORT_SYMBOL_GPL(dbs_update); -- 2.15.0 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2020-05-26 15:17 UTC|newest] Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top 2020-05-26 15:16 [RFC RESEND 0/3] Introduce cpufreq minimum load QoS Benjamin Gaignard 2020-05-26 15:16 ` Benjamin Gaignard 2020-05-26 15:16 ` [RFC 1/3] PM: QoS: " Benjamin Gaignard 2020-05-26 15:16 ` Benjamin Gaignard 2020-05-26 15:16 ` Benjamin Gaignard [this message] 2020-05-26 15:16 ` [RFC 2/3] cpufreq: governor: Use " Benjamin Gaignard 2020-05-26 15:16 ` [RFC 3/3] media: stm32-dcmi: Inform cpufreq governors about cpu load needs Benjamin Gaignard 2020-05-26 15:16 ` Benjamin Gaignard 2020-05-27 10:09 ` [RFC RESEND 0/3] Introduce cpufreq minimum load QoS Valentin Schneider 2020-05-27 10:09 ` Valentin Schneider 2020-05-27 11:17 ` Benjamin GAIGNARD 2020-05-27 11:17 ` Benjamin GAIGNARD 2020-05-27 12:14 ` Valentin Schneider 2020-05-27 12:14 ` Valentin Schneider 2020-05-27 13:11 ` Benjamin GAIGNARD 2020-05-27 13:11 ` Benjamin GAIGNARD 2020-05-27 15:02 ` Valentin Schneider 2020-05-27 15:02 ` Valentin Schneider 2020-05-27 12:22 ` Vincent Guittot 2020-05-27 12:22 ` Vincent Guittot 2020-05-27 12:48 ` Benjamin GAIGNARD 2020-05-27 12:48 ` Benjamin GAIGNARD 2020-05-27 14:54 ` Benjamin GAIGNARD 2020-05-27 14:54 ` Benjamin GAIGNARD 2020-05-27 15:03 ` Rafael J. Wysocki 2020-05-27 15:03 ` Rafael J. Wysocki -- strict thread matches above, loose matches on Subject: below -- 2020-04-24 11:40 [RFC " Benjamin Gaignard 2020-04-24 11:40 ` [RFC 2/3] cpufreq: governor: Use " Benjamin Gaignard 2020-04-24 11:40 ` Benjamin Gaignard
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