sched/accounting: Change cpustat fields to an array
This patch changes fields in cpustat from a structure, to an
u64 array. Math gets easier, and the code is more flexible.
Signed-off-by: Glauber Costa <glommer@parallels.com>
Reviewed-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Paul Tuner <pjt@google.com>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1322498719-2255-2-git-send-email-glommer@parallels.com
Signed-off-by: Ingo Molnar <mingo@elte.hu>
diff --git a/drivers/cpufreq/cpufreq_ondemand.c b/drivers/cpufreq/cpufreq_ondemand.c
index fa8af4e..f3d327c 100644
--- a/drivers/cpufreq/cpufreq_ondemand.c
+++ b/drivers/cpufreq/cpufreq_ondemand.c
@@ -119,27 +119,26 @@
.powersave_bias = 0,
};
-static inline cputime64_t get_cpu_idle_time_jiffy(unsigned int cpu,
- cputime64_t *wall)
+static inline u64 get_cpu_idle_time_jiffy(unsigned int cpu, u64 *wall)
{
- cputime64_t idle_time;
+ u64 idle_time;
cputime64_t cur_wall_time;
- cputime64_t busy_time;
+ u64 busy_time;
cur_wall_time = jiffies64_to_cputime64(get_jiffies_64());
- busy_time = cputime64_add(kstat_cpu(cpu).cpustat.user,
- kstat_cpu(cpu).cpustat.system);
+ busy_time = kcpustat_cpu(cpu).cpustat[CPUTIME_USER] +
+ kcpustat_cpu(cpu).cpustat[CPUTIME_SYSTEM];
- busy_time = cputime64_add(busy_time, kstat_cpu(cpu).cpustat.irq);
- busy_time = cputime64_add(busy_time, kstat_cpu(cpu).cpustat.softirq);
- busy_time = cputime64_add(busy_time, kstat_cpu(cpu).cpustat.steal);
- busy_time = cputime64_add(busy_time, kstat_cpu(cpu).cpustat.nice);
+ busy_time += kcpustat_cpu(cpu).cpustat[CPUTIME_IRQ];
+ busy_time += kcpustat_cpu(cpu).cpustat[CPUTIME_SOFTIRQ];
+ busy_time += kcpustat_cpu(cpu).cpustat[CPUTIME_STEAL];
+ busy_time += kcpustat_cpu(cpu).cpustat[CPUTIME_NICE];
idle_time = cputime64_sub(cur_wall_time, busy_time);
if (wall)
- *wall = (cputime64_t)jiffies_to_usecs(cur_wall_time);
+ *wall = jiffies_to_usecs(cur_wall_time);
- return (cputime64_t)jiffies_to_usecs(idle_time);
+ return jiffies_to_usecs(idle_time);
}
static inline cputime64_t get_cpu_idle_time(unsigned int cpu, cputime64_t *wall)
@@ -345,7 +344,7 @@
dbs_info->prev_cpu_idle = get_cpu_idle_time(j,
&dbs_info->prev_cpu_wall);
if (dbs_tuners_ins.ignore_nice)
- dbs_info->prev_cpu_nice = kstat_cpu(j).cpustat.nice;
+ dbs_info->prev_cpu_nice = kcpustat_cpu(j).cpustat[CPUTIME_NICE];
}
return count;
@@ -455,11 +454,11 @@
j_dbs_info->prev_cpu_iowait = cur_iowait_time;
if (dbs_tuners_ins.ignore_nice) {
- cputime64_t cur_nice;
+ u64 cur_nice;
unsigned long cur_nice_jiffies;
- cur_nice = cputime64_sub(kstat_cpu(j).cpustat.nice,
- j_dbs_info->prev_cpu_nice);
+ cur_nice = kcpustat_cpu(j).cpustat[CPUTIME_NICE] -
+ j_dbs_info->prev_cpu_nice;
/*
* Assumption: nice time between sampling periods will
* be less than 2^32 jiffies for 32 bit sys
@@ -467,7 +466,7 @@
cur_nice_jiffies = (unsigned long)
cputime64_to_jiffies64(cur_nice);
- j_dbs_info->prev_cpu_nice = kstat_cpu(j).cpustat.nice;
+ j_dbs_info->prev_cpu_nice = kcpustat_cpu(j).cpustat[CPUTIME_NICE];
idle_time += jiffies_to_usecs(cur_nice_jiffies);
}
@@ -646,10 +645,9 @@
j_dbs_info->prev_cpu_idle = get_cpu_idle_time(j,
&j_dbs_info->prev_cpu_wall);
- if (dbs_tuners_ins.ignore_nice) {
+ if (dbs_tuners_ins.ignore_nice)
j_dbs_info->prev_cpu_nice =
- kstat_cpu(j).cpustat.nice;
- }
+ kcpustat_cpu(j).cpustat[CPUTIME_NICE];
}
this_dbs_info->cpu = cpu;
this_dbs_info->rate_mult = 1;