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authorViresh Kumar <viresh.kumar@linaro.org>2017-07-19 13:12:41 +0300
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2017-07-22 03:25:20 +0300
commit2d045036322c29b69c22f06530f1130338d06373 (patch)
tree59a25f2a5a635dfe864fbefe1cb060bb27be7cc3 /drivers/cpufreq/cpufreq_ondemand.c
parent9dbd224f9e4e3285a1aba4c3c5683cee20e3c30c (diff)
downloadlinux-2d045036322c29b69c22f06530f1130338d06373.tar.xz
cpufreq: governor: Drop min_sampling_rate
The cpufreq core and governors aren't supposed to set a limit on how fast we want to try changing the frequency. This is currently done for the legacy governors with help of min_sampling_rate. At worst, we may end up setting the sampling rate to a value lower than the rate at which frequency can be changed and then one of the CPUs in the policy will be only changing frequency for ever. But that is something for the user to decide and there is no need to have special handling for such cases in the core. Leave it for the user to figure out. Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/cpufreq/cpufreq_ondemand.c')
-rw-r--r--drivers/cpufreq/cpufreq_ondemand.c12
1 files changed, 0 insertions, 12 deletions
diff --git a/drivers/cpufreq/cpufreq_ondemand.c b/drivers/cpufreq/cpufreq_ondemand.c
index 3937acf7e026..6b423eebfd5d 100644
--- a/drivers/cpufreq/cpufreq_ondemand.c
+++ b/drivers/cpufreq/cpufreq_ondemand.c
@@ -319,7 +319,6 @@ gov_show_one_common(sampling_rate);
gov_show_one_common(up_threshold);
gov_show_one_common(sampling_down_factor);
gov_show_one_common(ignore_nice_load);
-gov_show_one_common(min_sampling_rate);
gov_show_one_common(io_is_busy);
gov_show_one(od, powersave_bias);
@@ -329,10 +328,8 @@ gov_attr_rw(up_threshold);
gov_attr_rw(sampling_down_factor);
gov_attr_rw(ignore_nice_load);
gov_attr_rw(powersave_bias);
-gov_attr_ro(min_sampling_rate);
static struct attribute *od_attributes[] = {
- &min_sampling_rate.attr,
&sampling_rate.attr,
&up_threshold.attr,
&sampling_down_factor.attr,
@@ -373,17 +370,8 @@ static int od_init(struct dbs_data *dbs_data)
if (idle_time != -1ULL) {
/* Idle micro accounting is supported. Use finer thresholds */
dbs_data->up_threshold = MICRO_FREQUENCY_UP_THRESHOLD;
- /*
- * In nohz/micro accounting case we set the minimum frequency
- * not depending on HZ, but fixed (very low).
- */
- dbs_data->min_sampling_rate = MICRO_FREQUENCY_MIN_SAMPLE_RATE;
} else {
dbs_data->up_threshold = DEF_FREQUENCY_UP_THRESHOLD;
-
- /* For correct statistics, we need 10 ticks for each measure */
- dbs_data->min_sampling_rate = MIN_SAMPLING_RATE_RATIO *
- jiffies_to_usecs(10);
}
dbs_data->sampling_down_factor = DEF_SAMPLING_DOWN_FACTOR;