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Commit 3ca7d7ae authored by Saravana Kannan's avatar Saravana Kannan
Browse files

cpufreq: schedutil: Add hispeed load tunable 



In some cases, we might want to change hispeed load setting from the
default 90% loaded CPU. So, make it a run time tunable instead of a compile
time one.

Change-Id: I0ca596e7f9799bc9f488088f4a3edc392b25ae0e
Signed-off-by: default avatarSaravana Kannan <skannan@codeaurora.org>
parent e08dfa6b

kernel/sched/cpufreq_schedutil.c

+26 −2
Original line number Diff line number Diff line
@@ -28,6 +28,7 @@ unsigned long boosted_cpu_util(int cpu); 
struct sugov_tunables {

	struct gov_attr_set attr_set;

	unsigned int rate_limit_us;

	unsigned int hispeed_load;

	unsigned int hispeed_freq;

	bool pl;

};
@@ -266,7 +267,7 @@ static void sugov_calc_avg_cap(struct sugov_policy *sg_policy, u64 curr_ws, 
}



#define NL_RATIO 75

#define HISPEED_LOAD 90

#define DEFAULT_HISPEED_LOAD 90

static void sugov_walt_adjust(struct sugov_cpu *sg_cpu, unsigned long *util,

			      unsigned long *max)

{
@@ -280,7 +281,7 @@ static void sugov_walt_adjust(struct sugov_cpu *sg_cpu, unsigned long *util, 
		return;



	is_hiload = (cpu_util >= mult_frac(sg_policy->avg_cap,

					   HISPEED_LOAD,

					   sg_policy->tunables->hispeed_load,

					   100));



	if (is_hiload && !is_migration)
@@ -508,6 +509,26 @@ static ssize_t rate_limit_us_store(struct gov_attr_set *attr_set, const char *bu 
	return count;

}



static ssize_t hispeed_load_show(struct gov_attr_set *attr_set, char *buf)

{

	struct sugov_tunables *tunables = to_sugov_tunables(attr_set);



	return sprintf(buf, "%u\n", tunables->hispeed_load);

}



static ssize_t hispeed_load_store(struct gov_attr_set *attr_set,

				  const char *buf, size_t count)

{

	struct sugov_tunables *tunables = to_sugov_tunables(attr_set);



	if (kstrtouint(buf, 10, &tunables->hispeed_load))

		return -EINVAL;



	tunables->hispeed_load = min(100U, tunables->hispeed_load);



	return count;

}



static ssize_t hispeed_freq_show(struct gov_attr_set *attr_set, char *buf)

{

	struct sugov_tunables *tunables = to_sugov_tunables(attr_set);
@@ -559,11 +580,13 @@ static ssize_t pl_store(struct gov_attr_set *attr_set, const char *buf, 
}



static struct governor_attr rate_limit_us = __ATTR_RW(rate_limit_us);

static struct governor_attr hispeed_load = __ATTR_RW(hispeed_load);

static struct governor_attr hispeed_freq = __ATTR_RW(hispeed_freq);

static struct governor_attr pl = __ATTR_RW(pl);



static struct attribute *sugov_attributes[] = {

	&rate_limit_us.attr,

	&hispeed_load.attr,

	&hispeed_freq.attr,

	&pl.attr,

	NULL
@@ -710,6 +733,7 @@ static int sugov_init(struct cpufreq_policy *policy) 
	}



	tunables->rate_limit_us = LATENCY_MULTIPLIER;

	tunables->hispeed_load = DEFAULT_HISPEED_LOAD;

	tunables->hispeed_freq = 0;

	lat = policy->cpuinfo.transition_latency / NSEC_PER_USEC;

	if (lat)