[CPUFREQ] ondemand,conservative governor idle_tick clean-up
[PATCH] [3/5] ondemand,conservative governor idle_tick clean-up
Ondemand and conservative governor clean-up, it factorises the idle ticks
measurement.
Signed-off-by: Eric Piel <eric.piel@tremplin-utc.net>
Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Signed-off-by: Dave Jones <davej@redhat.com>
diff --git a/drivers/cpufreq/cpufreq_ondemand.c b/drivers/cpufreq/cpufreq_ondemand.c
index f239545..0482bd4 100644
--- a/drivers/cpufreq/cpufreq_ondemand.c
+++ b/drivers/cpufreq/cpufreq_ondemand.c
@@ -296,7 +296,6 @@
static void dbs_check_cpu(int cpu)
{
unsigned int idle_ticks, up_idle_ticks, down_idle_ticks;
- unsigned int total_idle_ticks;
unsigned int freq_down_step;
unsigned int freq_down_sampling_rate;
static int down_skip[NR_CPUS];
@@ -325,20 +324,12 @@
*/
/* Check for frequency increase */
- total_idle_ticks = get_cpu_idle_time(cpu);
- idle_ticks = total_idle_ticks -
- this_dbs_info->prev_cpu_idle_up;
- this_dbs_info->prev_cpu_idle_up = total_idle_ticks;
-
+ idle_ticks = UINT_MAX;
for_each_cpu_mask(j, policy->cpus) {
- unsigned int tmp_idle_ticks;
+ unsigned int tmp_idle_ticks, total_idle_ticks;
struct cpu_dbs_info_s *j_dbs_info;
- if (j == cpu)
- continue;
-
j_dbs_info = &per_cpu(cpu_dbs_info, j);
- /* Check for frequency increase */
total_idle_ticks = get_cpu_idle_time(j);
tmp_idle_ticks = total_idle_ticks -
j_dbs_info->prev_cpu_idle_up;
@@ -376,18 +367,11 @@
if (down_skip[cpu] < dbs_tuners_ins.sampling_down_factor)
return;
- total_idle_ticks = this_dbs_info->prev_cpu_idle_up;
- idle_ticks = total_idle_ticks -
- this_dbs_info->prev_cpu_idle_down;
- this_dbs_info->prev_cpu_idle_down = total_idle_ticks;
-
+ idle_ticks = UINT_MAX;
for_each_cpu_mask(j, policy->cpus) {
- unsigned int tmp_idle_ticks;
+ unsigned int tmp_idle_ticks, total_idle_ticks;
struct cpu_dbs_info_s *j_dbs_info;
- if (j == cpu)
- continue;
-
j_dbs_info = &per_cpu(cpu_dbs_info, j);
/* Check for frequency decrease */
total_idle_ticks = j_dbs_info->prev_cpu_idle_up;
@@ -408,7 +392,7 @@
down_idle_ticks = (100 - dbs_tuners_ins.down_threshold) *
usecs_to_jiffies(freq_down_sampling_rate);
- if (idle_ticks > down_idle_ticks ) {
+ if (idle_ticks > down_idle_ticks) {
/* if we are already at the lowest speed then break out early
* or if we 'cannot' reduce the speed as the user might want
* freq_step to be zero */
