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cpufreq: governor: Move io_is_busy to struct dbs_data

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The io_is_busy governor tunable is only used by the ondemand governor
and is located in the ondemand-specific data structure, but it is
looked at by the common governor code that has to do ugly things to
get to that value, so move it to struct dbs_data and modify ondemand
accordingly.

Since the conservative governor never touches that field, it will
be always 0 for that governor and it won't have any effect on the
results of computations in that case.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
This commit is contained in:
Rafael J. Wysocki
2016-02-18 02:20:13 +01:00
parent 574ef14d5d
commit 8847e038c1
3 changed files with 15 additions and 26 deletions
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27
drivers/cpufreq/cpufreq_governor.c
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@@ -137,10 +137,9 @@ unsigned int dbs_update(struct cpufreq_policy *policy)
struct dbs_governor *gov = dbs_governor_of(policy);
struct policy_dbs_info *policy_dbs = policy->governor_data;
struct dbs_data *dbs_data = policy_dbs->dbs_data;
struct od_dbs_tuners *od_tuners = dbs_data->tuners;
unsigned int ignore_nice = dbs_data->ignore_nice_load;
unsigned int max_load = 0;
unsigned int sampling_rate, j;
unsigned int sampling_rate, io_busy, j;
/*
* Sometimes governors may use an additional multiplier to increase
@@ -149,6 +148,12 @@ unsigned int dbs_update(struct cpufreq_policy *policy)
* conservative.
*/
sampling_rate = dbs_data->sampling_rate * policy_dbs->rate_mult;
/*
* For the purpose of ondemand, waiting for disk IO is an indication
* that you're performance critical, and not that the system is actually
* idle, so do not add the iowait time to the CPU idle time then.
*/
io_busy = dbs_data->io_is_busy;
/* Get Absolute Load */
for_each_cpu(j, policy->cpus) {
@@ -156,18 +161,9 @@ unsigned int dbs_update(struct cpufreq_policy *policy)
u64 cur_wall_time, cur_idle_time;
unsigned int idle_time, wall_time;
unsigned int load;
int io_busy = 0;
j_cdbs = gov->get_cpu_cdbs(j);
/*
* For the purpose of ondemand, waiting for disk IO is
* an indication that you're performance critical, and
* not that the system is actually idle. So do not add
* the iowait time to the cpu idle time.
*/
if (gov->governor == GOV_ONDEMAND)
io_busy = od_tuners->io_is_busy;
cur_idle_time = get_cpu_idle_time(j, &cur_wall_time, io_busy);
wall_time = cur_wall_time - j_cdbs->prev_cpu_wall;
@@ -522,7 +518,7 @@ static int cpufreq_governor_start(struct cpufreq_policy *policy)
struct policy_dbs_info *policy_dbs = policy->governor_data;
struct dbs_data *dbs_data = policy_dbs->dbs_data;
unsigned int sampling_rate, ignore_nice, j, cpu = policy->cpu;
int io_busy = 0;
unsigned int io_busy;
if (!policy->cur)
return -EINVAL;
@@ -532,12 +528,7 @@ static int cpufreq_governor_start(struct cpufreq_policy *policy)
sampling_rate = dbs_data->sampling_rate;
ignore_nice = dbs_data->ignore_nice_load;
if (gov->governor == GOV_ONDEMAND) {
struct od_dbs_tuners *od_tuners = dbs_data->tuners;
io_busy = od_tuners->io_is_busy;
}
io_busy = dbs_data->io_is_busy;
for_each_cpu(j, policy->cpus) {
struct cpu_dbs_info *j_cdbs = gov->get_cpu_cdbs(j);