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Message-id: <1375172259-9641-3-git-send-email-k.krivyakin@samsung.com>
Date: Tue, 30 Jul 2013 12:17:38 +0400
From: Konstantin Krivyakin <k.krivyakin@...sung.com>
To: linux-kernel@...r.kernel.org, rjw@...k.pl, viresh.kumar@...aro.org,
mingo@...hat.com, peterz@...radead.org, kgene.kim@...sung.com,
linux-pm@...r.kernel.org
Cc: k.krivyakin@...sung.com, i.zhbanov@...sung.com,
e.voevodin@...sung.com, kyungmin.park@...sung.com,
akpm@...ux-foundation.org
Subject: [PATCH RFC 2/3] Add power consumption counter in task_struct.
Signed-off-by: Konstantin Krivyakin <k.krivyakin@...sung.com>
---
include/linux/sched.h | 2 ++
include/uapi/linux/taskstats.h | 2 ++
kernel/fork.c | 1 +
kernel/sched/core.c | 8 ++++++++
kernel/sched/cputime.c | 11 +++++++++++
kernel/tsacct.c | 3 +++
6 files changed, 27 insertions(+)
diff --git a/include/linux/sched.h b/include/linux/sched.h
index cdd5407..f074718 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -1157,6 +1157,8 @@ struct task_struct {
int __user *clear_child_tid; /* CLONE_CHILD_CLEARTID */
cputime_t utime, stime, utimescaled, stimescaled;
+ u64 utime_power_cons;
+ u64 stime_power_cons;
cputime_t gtime;
#ifndef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE
struct cputime prev_cputime;
diff --git a/include/uapi/linux/taskstats.h b/include/uapi/linux/taskstats.h
index 2466e55..02ac708 100644
--- a/include/uapi/linux/taskstats.h
+++ b/include/uapi/linux/taskstats.h
@@ -116,6 +116,8 @@ struct taskstats {
/* Elapsed time [usec] */
__u64 ac_utime; /* User CPU time [usec] */
__u64 ac_stime; /* SYstem CPU time [usec] */
+ __u64 ac_utime_power_cons; /* User CPU time power consumption */
+ __u64 ac_stime_power_cons; /* System CPU time power consumption */
__u64 ac_minflt; /* Minor Page Fault Count */
__u64 ac_majflt; /* Major Page Fault Count */
/* Basic Accounting Fields end */
diff --git a/kernel/fork.c b/kernel/fork.c
index 6e6a1c1..a021d5b 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -1240,6 +1240,7 @@ static struct task_struct *copy_process(unsigned long clone_flags,
p->utime = p->stime = p->gtime = 0;
p->utimescaled = p->stimescaled = 0;
+ p->utime_power_cons = p->stime_power_cons = 0;
#ifndef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE
p->prev_cputime.utime = p->prev_cputime.stime = 0;
#endif
diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index 9b1f2e5..cac73d7 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -73,6 +73,7 @@
#include <linux/init_task.h>
#include <linux/binfmts.h>
#include <linux/context_tracking.h>
+#include <linux/cpufreq.h>
#include <asm/switch_to.h>
#include <asm/tlb.h>
@@ -297,6 +298,13 @@ __read_mostly int scheduler_running;
int sysctl_sched_rt_runtime = 950000;
+static u64 cpu_power_cons(cputime_t cputime)
+{
+ struct thread_info *ti = current_thread_info();
+
+ return cpu_power_get(ti->cpu) * cputime;
+}
+
/*
* __task_rq_lock - lock the rq @p resides on.
diff --git a/kernel/sched/cputime.c b/kernel/sched/cputime.c
index a7959e0..512727d 100644
--- a/kernel/sched/cputime.c
+++ b/kernel/sched/cputime.c
@@ -4,6 +4,7 @@
#include <linux/kernel_stat.h>
#include <linux/static_key.h>
#include <linux/context_tracking.h>
+#include <linux/cpufreq.h>
#include "sched.h"
@@ -126,6 +127,13 @@ static inline void task_group_account_field(struct task_struct *p, int index,
cpuacct_account_field(p, index, tmp);
}
+static u64 cpu_power_cons(cputime_t cputime)
+{
+ struct thread_info *ti = current_thread_info();
+
+ return cpu_power_get(ti->cpu) * cputime;
+}
+
/*
* Account user cpu time to a process.
* @p: the process that the cpu time gets accounted to
@@ -138,6 +146,7 @@ void account_user_time(struct task_struct *p, cputime_t cputime,
int index;
/* Add user time to process. */
+ p->utime_power_cons += cpu_power_cons(cputime);
p->utime += cputime;
p->utimescaled += cputime_scaled;
account_group_user_time(p, cputime);
@@ -163,6 +172,7 @@ static void account_guest_time(struct task_struct *p, cputime_t cputime,
u64 *cpustat = kcpustat_this_cpu->cpustat;
/* Add guest time to process. */
+ p->utime_power_cons += cpu_power_cons(cputime);
p->utime += cputime;
p->utimescaled += cputime_scaled;
account_group_user_time(p, cputime);
@@ -190,6 +200,7 @@ void __account_system_time(struct task_struct *p, cputime_t cputime,
cputime_t cputime_scaled, int index)
{
/* Add system time to process. */
+ p->stime_power_cons += cpu_power_cons(cputime);
p->stime += cputime;
p->stimescaled += cputime_scaled;
account_group_system_time(p, cputime);
diff --git a/kernel/tsacct.c b/kernel/tsacct.c
index a1dd9a1..cea4a9c 100644
--- a/kernel/tsacct.c
+++ b/kernel/tsacct.c
@@ -75,6 +75,9 @@ void bacct_add_tsk(struct user_namespace *user_ns,
stats->ac_utimescaled = cputime_to_usecs(utimescaled);
stats->ac_stimescaled = cputime_to_usecs(stimescaled);
+ stats->ac_utime_power_cons = tsk->utime_power_cons;
+ stats->ac_stime_power_cons = tsk->stime_power_cons;
+
stats->ac_minflt = tsk->min_flt;
stats->ac_majflt = tsk->maj_flt;
--
1.7.9.5
--
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