Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit d4854b0f authored by Todd Poynor's avatar Todd Poynor Committed by Ruchi Kandoi
Browse files

cpufreq: interactive: run at fraction of hispeed_freq when load is low 



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 speed,
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 typically
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 is
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: default avatarTodd Poynor <toddpoynor@google.com>
parent c034ef70

drivers/cpufreq/cpufreq_interactive.c

+5 −5
Original line number Diff line number Diff line
@@ -63,7 +63,7 @@ static cpumask_t speedchange_cpumask; 
static spinlock_t speedchange_cpumask_lock;



/* Hi speed to bump to from lo speed when load burst (default max) */

static u64 hispeed_freq;

static unsigned int hispeed_freq;



/* 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 = pcpu->policy->max * cpu_load / 100;

		new_freq = hispeed_freq * cpu_load / 100;

	}



	if (new_freq <= 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);

}



static ssize_t store_hispeed_freq(struct kobject *kobj,
@@ -473,9 +473,9 @@ static ssize_t store_hispeed_freq(struct kobject *kobj, 
				  size_t count)

{

	int ret;

	u64 val;

	long unsigned int val;



	ret = strict_strtoull(buf, 0, &val);

	ret = strict_strtoul(buf, 0, &val);

	if (ret < 0)

		return ret;

	hispeed_freq = val;