Commit 57eb832f authored by Rafael J. Wysocki's avatar Rafael J. Wysocki
Browse files

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: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: default avatarViresh Kumar <viresh.kumar@linaro.org>
parent 679b8fe4

drivers/cpufreq/cpufreq_governor.c

+10 −14
Original line number Diff line number Diff line
@@ -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);

		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];

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