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[CPUFREQ] use max load in conservative governor

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

Reported-by: Jean-Christian Goussard <jeanchristian.goussard@sfr.fr>
Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
Signed-off-by: Dave Jones <davej@redhat.com>
This commit is contained in:
Dominik Brodowski 2010-03-26 10:01:34 +01:00 committed by Dave Jones
parent 499bca9b6d
commit fd187aaf98
1 changed files with 6 additions and 2 deletions
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8
drivers/cpufreq/cpufreq_conservative.c
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@ -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;