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Date: Fri, 28 Nov 2014 19:24:00 +0100
From: Frederic Weisbecker <fweisbec@...il.com>
To: LKML <linux-kernel@...r.kernel.org>
Cc: Frederic Weisbecker <fweisbec@...il.com>,
Tony Luck <tony.luck@...el.com>,
Peter Zijlstra <peterz@...radead.org>,
Heiko Carstens <heiko.carstens@...ibm.com>,
Benjamin Herrenschmidt <benh@...nel.crashing.org>,
Thomas Gleixner <tglx@...utronix.de>,
Oleg Nesterov <oleg@...hat.com>,
Paul Mackerras <paulus@...ba.org>,
Wu Fengguang <fengguang.wu@...el.com>,
Ingo Molnar <mingo@...nel.org>, Rik van Riel <riel@...hat.com>,
Martin Schwidefsky <schwidefsky@...ibm.com>
Subject: [RFC PATCH 30/30] cputime: Push time to account_system_time() in nanosecs
Cc: Benjamin Herrenschmidt <benh@...nel.crashing.org>
Cc: Heiko Carstens <heiko.carstens@...ibm.com>
Cc: Ingo Molnar <mingo@...nel.org>
Cc: Martin Schwidefsky <schwidefsky@...ibm.com>
Cc: Oleg Nesterov <oleg@...hat.com>
Cc: Paul Mackerras <paulus@...ba.org>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Rik van Riel <riel@...hat.com>
Cc: Thomas Gleixner <tglx@...utronix.de>
Cc: Tony Luck <tony.luck@...el.com>
Cc: Wu Fengguang <fengguang.wu@...el.com>
Signed-off-by: Frederic Weisbecker <fweisbec@...il.com>
---
arch/ia64/kernel/time.c | 2 +-
arch/powerpc/kernel/time.c | 3 ++-
arch/s390/kernel/vtime.c | 7 ++++---
include/linux/kernel_stat.h | 2 +-
kernel/sched/cputime.c | 22 +++++++++++-----------
kernel/sched/stats.h | 4 ++--
6 files changed, 21 insertions(+), 19 deletions(-)
diff --git a/arch/ia64/kernel/time.c b/arch/ia64/kernel/time.c
index 2f9e8f0..f01bb2a 100644
--- a/arch/ia64/kernel/time.c
+++ b/arch/ia64/kernel/time.c
@@ -135,7 +135,7 @@ static cputime_t vtime_delta(struct task_struct *tsk)
void vtime_account_system(struct task_struct *tsk)
{
- cputime_t delta = vtime_delta(tsk);
+ u64 delta = cputime_to_nsecs(vtime_delta(tsk));
account_system_time(tsk, 0, delta, delta);
}
diff --git a/arch/powerpc/kernel/time.c b/arch/powerpc/kernel/time.c
index cdd78a2..bb839fb 100644
--- a/arch/powerpc/kernel/time.c
+++ b/arch/powerpc/kernel/time.c
@@ -344,7 +344,8 @@ void vtime_account_system(struct task_struct *tsk)
u64 delta, sys_scaled, stolen;
delta = vtime_delta(tsk, &sys_scaled, &stolen);
- account_system_time(tsk, 0, delta, sys_scaled);
+ account_system_time(tsk, 0, cputime_to_nsecs(delta),
+ cputime_to_nsecs(sys_scaled));
if (stolen)
account_steal_time(cputime_to_nsecs(stolen));
}
diff --git a/arch/s390/kernel/vtime.c b/arch/s390/kernel/vtime.c
index a2dfba1..0780700 100644
--- a/arch/s390/kernel/vtime.c
+++ b/arch/s390/kernel/vtime.c
@@ -86,7 +86,7 @@ static int do_account_vtime(struct task_struct *tsk, int hardirq_offset)
S390_lowcore.steal_timer -= system;
ti->system_timer = S390_lowcore.system_timer;
nsecs = cputime_to_nsecs(system);
- account_system_time(tsk, hardirq_offset, system, system);
+ account_system_time(tsk, hardirq_offset, nsecs, nsecs);
steal = S390_lowcore.steal_timer;
if ((s64) steal > 0) {
@@ -128,7 +128,7 @@ void vtime_account_user(struct task_struct *tsk)
void vtime_account_irq_enter(struct task_struct *tsk)
{
struct thread_info *ti = task_thread_info(tsk);
- u64 timer, system;
+ u64 timer, system, nsecs;
WARN_ON_ONCE(!irqs_disabled());
@@ -139,7 +139,8 @@ void vtime_account_irq_enter(struct task_struct *tsk)
system = S390_lowcore.system_timer - ti->system_timer;
S390_lowcore.steal_timer -= system;
ti->system_timer = S390_lowcore.system_timer;
- account_system_time(tsk, 0, system, system);
+ nsecs = cputime_to_nsecs(system);
+ account_system_time(tsk, 0, nsecs, nsecs);
virt_timer_forward(system);
}
diff --git a/include/linux/kernel_stat.h b/include/linux/kernel_stat.h
index 2b26786..ec7d6f0 100644
--- a/include/linux/kernel_stat.h
+++ b/include/linux/kernel_stat.h
@@ -85,7 +85,7 @@ static inline unsigned int kstat_cpu_irqs_sum(unsigned int cpu)
extern unsigned long long task_delta_exec(struct task_struct *);
extern void account_user_time(struct task_struct *, u64, u64);
-extern void account_system_time(struct task_struct *, int, cputime_t, cputime_t);
+extern void account_system_time(struct task_struct *, int, u64, u64);
extern void account_steal_time(u64);
extern void account_idle_time(u64);
diff --git a/kernel/sched/cputime.c b/kernel/sched/cputime.c
index 9d002f5..5f3ff5c 100644
--- a/kernel/sched/cputime.c
+++ b/kernel/sched/cputime.c
@@ -177,16 +177,16 @@ static void account_guest_time(struct task_struct *p, u64 cputime,
* @target_cputime64: pointer to cpustat field that has to be updated
*/
static inline
-void __account_system_time(struct task_struct *p, cputime_t cputime,
- cputime_t cputime_scaled, int index)
+void __account_system_time(struct task_struct *p, u64 cputime,
+ u64 cputime_scaled, int index)
{
/* Add system time to process. */
- p->stime += cputime_to_nsecs(cputime);
- p->stimescaled += cputime_to_nsecs(cputime_scaled);
+ p->stime += cputime;
+ p->stimescaled += cputime_scaled;
account_group_system_time(p, cputime);
/* Add system time to cpustat. */
- task_group_account_field(p, index, cputime_to_nsecs(cputime));
+ task_group_account_field(p, index, cputime);
/* Account for system time used */
acct_account_cputime(p);
@@ -200,12 +200,12 @@ void __account_system_time(struct task_struct *p, cputime_t cputime,
* @cputime_scaled: cputime scaled by cpu frequency
*/
void account_system_time(struct task_struct *p, int hardirq_offset,
- cputime_t cputime, cputime_t cputime_scaled)
+ u64 cputime, u64 cputime_scaled)
{
int index;
if ((p->flags & PF_VCPU) && (irq_count() - hardirq_offset == 0)) {
- account_guest_time(p, cputime_to_nsecs(cputime), cputime_to_nsecs(cputime_scaled));
+ account_guest_time(p, cputime, cputime_scaled);
return;
}
@@ -344,7 +344,7 @@ static void irqtime_account_process_tick(struct task_struct *p, int user_tick,
* So, we have to handle it separately here.
* Also, p->stime needs to be updated for ksoftirqd.
*/
- __account_system_time(p, cputime, scaled, CPUTIME_SOFTIRQ);
+ __account_system_time(p, nsec, nsec_scaled, CPUTIME_SOFTIRQ);
} else if (user_tick) {
account_user_time(p, nsec, nsec_scaled);
} else if (p == rq->idle) {
@@ -352,7 +352,7 @@ static void irqtime_account_process_tick(struct task_struct *p, int user_tick,
} else if (p->flags & PF_VCPU) { /* System time or guest time */
account_guest_time(p, nsec, nsec_scaled);
} else {
- __account_system_time(p, cputime, scaled, CPUTIME_SYSTEM);
+ __account_system_time(p, nsec, nsec_scaled, CPUTIME_SYSTEM);
}
}
@@ -468,8 +468,8 @@ void account_process_tick(struct task_struct *p, int user_tick)
if (user_tick)
account_user_time(p, nsec, nsec_scaled);
else if ((p != rq->idle) || (irq_count() != HARDIRQ_OFFSET))
- account_system_time(p, HARDIRQ_OFFSET, cputime_one_jiffy,
- one_jiffy_scaled);
+ account_system_time(p, HARDIRQ_OFFSET, nsec,
+ nsec_scaled);
else
account_idle_time(cputime_one_jiffy);
}
diff --git a/kernel/sched/stats.h b/kernel/sched/stats.h
index 649b38c..0c88cbe 100644
--- a/kernel/sched/stats.h
+++ b/kernel/sched/stats.h
@@ -231,7 +231,7 @@ static inline void account_group_user_time(struct task_struct *tsk,
* running CPU and update the stime field there.
*/
static inline void account_group_system_time(struct task_struct *tsk,
- cputime_t cputime)
+ u64 cputime)
{
struct thread_group_cputimer *cputimer = &tsk->signal->cputimer;
@@ -239,7 +239,7 @@ static inline void account_group_system_time(struct task_struct *tsk,
return;
raw_spin_lock(&cputimer->lock);
- cputimer->cputime.stime += cputime;
+ cputimer->cputime.stime += nsecs_to_cputime(cputime);
raw_spin_unlock(&cputimer->lock);
}
--
2.1.3
--
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