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| author | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2016-02-16 00:58:47 +0100 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2016-03-09 14:41:03 +0100 |
| commit | 57eb832f90e645dcb97d651ad052c0537cc1b3a7 (patch) | |
| tree | 838994064a7f00ef7f2edab4cab9813648315a68 /drivers/cpufreq/cpufreq_governor.c | |
| parent | 679b8fe43a6b723787cae1d9599ed776d7ce238b (diff) | |
| download | linux-stable-57eb832f90e645dcb97d651ad052c0537cc1b3a7.tar.gz linux-stable-57eb832f90e645dcb97d651ad052c0537cc1b3a7.tar.bz2 linux-stable-57eb832f90e645dcb97d651ad052c0537cc1b3a7.zip | |
cpufreq: governor: Clean up load-related computations
Clean up some load-related computations in dbs_check_cpu() and
cpufreq_governor_start() to get rid of unnecessary operations and
type casts and make the code easier to read.
No functional changes.
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Diffstat (limited to 'drivers/cpufreq/cpufreq_governor.c')
| -rw-r--r-- | drivers/cpufreq/cpufreq_governor.c | 24 |
1 files changed, 10 insertions, 14 deletions
diff --git a/drivers/cpufreq/cpufreq_governor.c b/drivers/cpufreq/cpufreq_governor.c index c5469701a3ef..1f580cb62902 100644 --- a/drivers/cpufreq/cpufreq_governor.c +++ b/drivers/cpufreq/cpufreq_governor.c @@ -186,16 +186,15 @@ void dbs_check_cpu(struct cpufreq_policy *policy) io_busy = od_tuners->io_is_busy; cur_idle_time = get_cpu_idle_time(j, &cur_wall_time, io_busy); - wall_time = (unsigned int) - (cur_wall_time - j_cdbs->prev_cpu_wall); + wall_time = cur_wall_time - j_cdbs->prev_cpu_wall; j_cdbs->prev_cpu_wall = cur_wall_time; - if (cur_idle_time < j_cdbs->prev_cpu_idle) - cur_idle_time = j_cdbs->prev_cpu_idle; - - idle_time = (unsigned int) - (cur_idle_time - j_cdbs->prev_cpu_idle); - j_cdbs->prev_cpu_idle = cur_idle_time; + if (cur_idle_time <= j_cdbs->prev_cpu_idle) { + idle_time = 0; + } else { + idle_time = cur_idle_time - j_cdbs->prev_cpu_idle; + j_cdbs->prev_cpu_idle = cur_idle_time; + } if (ignore_nice) { u64 cur_nice = kcpustat_cpu(j).cpustat[CPUTIME_NICE]; @@ -562,13 +561,10 @@ static int cpufreq_governor_start(struct cpufreq_policy *policy) struct cpu_dbs_info *j_cdbs = gov->get_cpu_cdbs(j); unsigned int prev_load; - j_cdbs->prev_cpu_idle = - get_cpu_idle_time(j, &j_cdbs->prev_cpu_wall, io_busy); + j_cdbs->prev_cpu_idle = get_cpu_idle_time(j, &j_cdbs->prev_cpu_wall, io_busy); - prev_load = (unsigned int)(j_cdbs->prev_cpu_wall - - j_cdbs->prev_cpu_idle); - j_cdbs->prev_load = 100 * prev_load / - (unsigned int)j_cdbs->prev_cpu_wall; + prev_load = j_cdbs->prev_cpu_wall - j_cdbs->prev_cpu_idle; + j_cdbs->prev_load = 100 * prev_load / (unsigned int)j_cdbs->prev_cpu_wall; if (ignore_nice) j_cdbs->prev_cpu_nice = kcpustat_cpu(j).cpustat[CPUTIME_NICE]; |