From: Steve Muckle <steve.muckle@linaro.org>
To: Peter Zijlstra <peterz@infradead.org>,
Ingo Molnar <mingo@redhat.com>,
"Rafael J . Wysocki" <rjw@rjwysocki.net>,
Viresh Kumar <viresh.kumar@linaro.org>
Cc: linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org,
Vincent Guittot <vincent.guittot@linaro.org>,
Morten Rasmussen <morten.rasmussen@arm.com>,
Dietmar Eggemann <dietmar.eggemann@arm.com>,
Juri Lelli <Juri.Lelli@arm.com>,
Patrick Bellasi <patrick.bellasi@arm.com>,
Steve Muckle <smuckle@linaro.org>
Subject: [PATCH v3 3/3] cpufreq: acpi-cpufreq: use cached frequency mapping when possible
Date: Wed, 13 Jul 2016 13:25:27 -0700 [thread overview]
Message-ID: <1468441527-23534-4-git-send-email-smuckle@linaro.org> (raw)
In-Reply-To: <1468441527-23534-1-git-send-email-smuckle@linaro.org>
A call to cpufreq_driver_resolve_freq will cache the mapping from
the desired target frequency to the frequency table index. If there
is a mapping for the desired target frequency then use it instead of
looking up the mapping again.
Signed-off-by: Steve Muckle <smuckle@linaro.org>
---
drivers/cpufreq/acpi-cpufreq.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/drivers/cpufreq/acpi-cpufreq.c b/drivers/cpufreq/acpi-cpufreq.c
index 11c9a078e0fd..297e9128fe9f 100644
--- a/drivers/cpufreq/acpi-cpufreq.c
+++ b/drivers/cpufreq/acpi-cpufreq.c
@@ -473,7 +473,10 @@ unsigned int acpi_cpufreq_fast_switch(struct cpufreq_policy *policy,
/*
* Find the closest frequency above target_freq.
*/
- index = cpufreq_table_find_index_dl(policy, target_freq);
+ if (policy->cached_target_freq == target_freq)
+ index = policy->cached_resolved_idx;
+ else
+ index = cpufreq_table_find_index_dl(policy, target_freq);
entry = &policy->freq_table[index];
next_freq = entry->frequency;
--
2.7.3
next prev parent reply other threads:[~2016-07-13 20:25 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-07-13 20:25 [PATCH v3 0/3] cpufreq: avoid redundant driver calls in schedutil Steve Muckle
2016-07-13 20:25 ` [PATCH v3 1/3] cpufreq: add cpufreq_driver_resolve_freq() Steve Muckle
2016-07-21 19:59 ` Viresh Kumar
2016-07-21 20:31 ` Rafael J. Wysocki
2016-07-21 20:30 ` Viresh Kumar
2016-07-21 20:52 ` Rafael J. Wysocki
2016-07-21 20:52 ` Viresh Kumar
2016-07-21 21:19 ` Rafael J. Wysocki
2016-07-21 21:16 ` Viresh Kumar
2016-07-21 23:21 ` Steve Muckle
2016-07-21 23:29 ` Steve Muckle
2016-07-21 23:31 ` Viresh Kumar
2016-07-21 23:30 ` Viresh Kumar
2016-07-21 23:36 ` Steve Muckle
2016-07-21 23:41 ` Steve Muckle
2016-07-22 0:44 ` Steve Muckle
2016-07-22 15:16 ` Viresh Kumar
2016-07-22 17:49 ` Steve Muckle
2016-07-21 21:13 ` Viresh Kumar
2016-07-13 20:25 ` [PATCH v3 2/3] cpufreq: schedutil: map raw required frequency to driver frequency Steve Muckle
2016-07-13 20:25 ` Steve Muckle [this message]
2016-07-14 10:02 ` [PATCH v3 0/3] cpufreq: avoid redundant driver calls in schedutil Pingbo Wen
2016-07-14 18:00 ` Steve Muckle
2016-07-21 20:01 ` Viresh Kumar
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