From mboxrd@z Thu Jan 1 00:00:00 1970 From: =?UTF-8?q?B=C3=A1lint=20Czobor?= Subject: [PATCH 22/70] cpufreq: interactive: run at fraction of hispeed_freq when load is low Date: Tue, 27 Oct 2015 18:30:10 +0100 Message-ID: <1445967059-6897-22-git-send-email-czoborbalint@gmail.com> References: <1445967059-6897-1-git-send-email-czoborbalint@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: In-Reply-To: <1445967059-6897-1-git-send-email-czoborbalint@gmail.com> Sender: linux-kernel-owner@vger.kernel.org To: "Rafael J. Wysocki" , Viresh Kumar Cc: linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org, Todd Poynor , =?UTF-8?q?B=C3=A1lint=20Czobor?= List-Id: linux-pm@vger.kernel.org =46rom: Todd Poynor When load is below go_hispeed_load, apply the percentage of CPU load to a max frequency of hispeed_freq instead of the max speed. This avoids jumping too quickly to hispeed_freq when it is a relatively low percentage of max speed. This also allows go_hispeed_load to be set to a high percentage relative to hispeed_freq (as a percentage of max spee= d, again useful when hispeed_freq is a low fraction of max speed), to cap larger loads at hispeed_freq. For example, a load of 60% will typicall= y move to 60% of hispeed_freq, not 60% of max speed. This causes the governor to apply two different speed caps, depending on whether load i= s below or above go_hispeed_load. Also fix the type of hispeed_freq, which was u64, to match other speed data types (and avoid overhead and allow division). Change-Id: Ie2d0668be161c074aaad77db2037505431457b3a Signed-off-by: Todd Poynor Signed-off-by: B=C3=A1lint Czobor --- drivers/cpufreq/cpufreq_interactive.c | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) diff --git a/drivers/cpufreq/cpufreq_interactive.c b/drivers/cpufreq/cp= ufreq_interactive.c index f85fbbd..16bd23b 100644 --- a/drivers/cpufreq/cpufreq_interactive.c +++ b/drivers/cpufreq/cpufreq_interactive.c @@ -63,7 +63,7 @@ static cpumask_t speedchange_cpumask; static spinlock_t speedchange_cpumask_lock; =20 /* Hi speed to bump to from lo speed when load burst (default max) */ -static u64 hispeed_freq; +static unsigned int hispeed_freq; =20 /* Go to hi speed when CPU load at or above this value. */ #define DEFAULT_GO_HISPEED_LOAD 85 @@ -198,7 +198,7 @@ static void cpufreq_interactive_timer(unsigned long= data) } } } else { - new_freq =3D pcpu->policy->max * cpu_load / 100; + new_freq =3D hispeed_freq * cpu_load / 100; } =20 if (new_freq <=3D hispeed_freq) @@ -465,7 +465,7 @@ static void cpufreq_interactive_boost(void) static ssize_t show_hispeed_freq(struct kobject *kobj, struct attribute *attr, char *buf) { - return sprintf(buf, "%llu\n", hispeed_freq); + return sprintf(buf, "%u\n", hispeed_freq); } =20 static ssize_t store_hispeed_freq(struct kobject *kobj, @@ -473,9 +473,9 @@ static ssize_t store_hispeed_freq(struct kobject *k= obj, size_t count) { int ret; - u64 val; + long unsigned int val; =20 - ret =3D strict_strtoull(buf, 0, &val); + ret =3D strict_strtoul(buf, 0, &val); if (ret < 0) return ret; hispeed_freq =3D val; --=20 1.7.9.5