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| author | Stratos Karafotis <stratosk@semaphore.gr> | 2013-02-28 16:57:32 +0000 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2013-04-01 01:11:35 +0200 |
| commit | 9366d84052e7c5b2eca804c08cfcd00b490f4de2 (patch) | |
| tree | 0f159a425d29f1c6be12dbf30f18a55b79ae72d2 /drivers/cpufreq/cpufreq_governor.h | |
| parent | fed573d5c91ab8f12801740cfac0567e33635b1e (diff) | |
| download | talos-obmc-linux-9366d84052e7c5b2eca804c08cfcd00b490f4de2.tar.gz talos-obmc-linux-9366d84052e7c5b2eca804c08cfcd00b490f4de2.zip | |
cpufreq: governors: Calculate iowait time only when necessary
Currently we always calculate the CPU iowait time and add it to idle time.
If we are in ondemand and we use io_is_busy, we re-calculate iowait time
and we subtract it from idle time.
With this patch iowait time is calculated only when necessary avoiding
the double call to get_cpu_iowait_time_us. We use a parameter in
function get_cpu_idle_time to distinguish when the iowait time will be
added to idle time or not, without the need of keeping the prev_io_wait.
Signed-off-by: Stratos Karafotis <stratosk@semaphore.gr>
Acked-by: Viresh Kumar <viresh.kumar@linaro.,org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/cpufreq/cpufreq_governor.h')
| -rw-r--r-- | drivers/cpufreq/cpufreq_governor.h | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/drivers/cpufreq/cpufreq_governor.h b/drivers/cpufreq/cpufreq_governor.h index c9c269f2b973..513cc8234e5e 100644 --- a/drivers/cpufreq/cpufreq_governor.h +++ b/drivers/cpufreq/cpufreq_governor.h @@ -148,7 +148,6 @@ struct cpu_dbs_common_info { struct od_cpu_dbs_info_s { struct cpu_dbs_common_info cdbs; - u64 prev_cpu_iowait; struct cpufreq_frequency_table *freq_table; unsigned int freq_lo; unsigned int freq_lo_jiffies; @@ -256,7 +255,7 @@ static ssize_t show_sampling_rate_min_gov_pol \ return sprintf(buf, "%u\n", dbs_data->min_sampling_rate); \ } -u64 get_cpu_idle_time(unsigned int cpu, u64 *wall); +u64 get_cpu_idle_time(unsigned int cpu, u64 *wall, int io_busy); void dbs_check_cpu(struct dbs_data *dbs_data, int cpu); bool need_load_eval(struct cpu_dbs_common_info *cdbs, unsigned int sampling_rate); |
