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Commit fd187aaf authored by Dominik Brodowski's avatar Dominik Brodowski Committed by Dave Jones
Browse files

[CPUFREQ] use max load in conservative governor 



Instead of using the load of the last CPU in a package, use the
maximum load of all CPUs in a package.

Reported-by: default avatarJean-Christian Goussard <jeanchristian.goussard@sfr.fr>
Signed-off-by: default avatarDominik Brodowski <linux@dominikbrodowski.net>
Signed-off-by: default avatarDave Jones <davej@redhat.com>
parent 499bca9b

drivers/cpufreq/cpufreq_conservative.c

+6 −2
Original line number Diff line number Diff line
@@ -444,6 +444,7 @@ static struct attribute_group dbs_attr_group_old = { 
static void dbs_check_cpu(struct cpu_dbs_info_s *this_dbs_info)

{

	unsigned int load = 0;

	unsigned int max_load = 0;

	unsigned int freq_target;



	struct cpufreq_policy *policy;
@@ -501,6 +502,9 @@ static void dbs_check_cpu(struct cpu_dbs_info_s *this_dbs_info) 
			continue;



		load = 100 * (wall_time - idle_time) / wall_time;



		if (load > max_load)

			max_load = load;

	}



	/*
@@ -511,7 +515,7 @@ static void dbs_check_cpu(struct cpu_dbs_info_s *this_dbs_info) 
		return;



	/* Check for frequency increase */

	if (load > dbs_tuners_ins.up_threshold) {

	if (max_load > dbs_tuners_ins.up_threshold) {

		this_dbs_info->down_skip = 0;



		/* if we are already at full speed then break out early */
@@ -538,7 +542,7 @@ static void dbs_check_cpu(struct cpu_dbs_info_s *this_dbs_info) 
	 * can support the current CPU usage without triggering the up

	 * policy. To be safe, we focus 10 points under the threshold.

	 */

	if (load < (dbs_tuners_ins.down_threshold - 10)) {

	if (max_load < (dbs_tuners_ins.down_threshold - 10)) {

		freq_target = (dbs_tuners_ins.freq_step * policy->max) / 100;



		this_dbs_info->requested_freq -= freq_target;