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Date: Thu, 17 Nov 2016 19:08:32 +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>,
Wanpeng Li <wanpeng.li@...mail.com>,
Peter Zijlstra <peterz@...radead.org>,
Michael Ellerman <mpe@...erman.id.au>,
Heiko Carstens <heiko.carstens@...ibm.com>,
Benjamin Herrenschmidt <benh@...nel.crashing.org>,
Thomas Gleixner <tglx@...utronix.de>,
Paul Mackerras <paulus@...ba.org>,
Ingo Molnar <mingo@...nel.org>,
Fenghua Yu <fenghua.yu@...el.com>,
Rik van Riel <riel@...hat.com>,
Martin Schwidefsky <schwidefsky@...ibm.com>,
Stanislaw Gruszka <sgruszka@...hat.com>
Subject: [PATCH 25/36] cputime: Push time to account_system_time() in nsecs
This is one more step toward converting cputime accounting to pure nsecs.
Cc: Benjamin Herrenschmidt <benh@...nel.crashing.org>
Cc: Paul Mackerras <paulus@...ba.org>
Cc: Michael Ellerman <mpe@...erman.id.au>
Cc: Heiko Carstens <heiko.carstens@...ibm.com>
Cc: Martin Schwidefsky <schwidefsky@...ibm.com>
Cc: Tony Luck <tony.luck@...el.com>
Cc: Fenghua Yu <fenghua.yu@...el.com>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Rik van Riel <riel@...hat.com>
Cc: Thomas Gleixner <tglx@...utronix.de>
Cc: Ingo Molnar <mingo@...nel.org>
Cc: Stanislaw Gruszka <sgruszka@...hat.com>
Cc: Wanpeng Li <wanpeng.li@...mail.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 | 4 ++--
include/linux/kernel_stat.h | 3 +--
kernel/sched/cputime.c | 38 ++++++++++++++++++--------------------
5 files changed, 24 insertions(+), 26 deletions(-)
diff --git a/arch/ia64/kernel/time.c b/arch/ia64/kernel/time.c
index 0287ffe..0aba18e 100644
--- a/arch/ia64/kernel/time.c
+++ b/arch/ia64/kernel/time.c
@@ -113,7 +113,7 @@ void vtime_account_system(struct task_struct *tsk)
{
cputime_t delta = vtime_delta(tsk);
- account_system_time(tsk, 0, delta);
+ account_system_time(tsk, 0, cputime_to_nsecs(delta));
}
EXPORT_SYMBOL_GPL(vtime_account_system);
diff --git a/arch/powerpc/kernel/time.c b/arch/powerpc/kernel/time.c
index 7cd3b3c..b29822d 100644
--- a/arch/powerpc/kernel/time.c
+++ b/arch/powerpc/kernel/time.c
@@ -358,8 +358,9 @@ void vtime_account_system(struct task_struct *tsk)
unsigned long delta, sys_scaled, stolen;
delta = vtime_delta(tsk, &sys_scaled, &stolen);
- account_system_time(tsk, 0, delta);
+ account_system_time(tsk, 0, cputime_to_nsecs(delta));
tsk->stimescaled += 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 02c3970..b7e545f 100644
--- a/arch/s390/kernel/vtime.c
+++ b/arch/s390/kernel/vtime.c
@@ -139,7 +139,7 @@ static int do_account_vtime(struct task_struct *tsk, int hardirq_offset)
}
account_user_time(tsk, cputime_to_nsecs(user));
tsk->utimescaled += cputime_to_nsecs(user_scaled);
- account_system_time(tsk, hardirq_offset, system);
+ account_system_time(tsk, hardirq_offset, cputime_to_nsecs(system));
tsk->stimescaled += cputime_to_nsecs(system_scaled);
steal = S390_lowcore.steal_timer;
@@ -204,7 +204,7 @@ void vtime_account_irq_enter(struct task_struct *tsk)
system_scaled = (system_scaled * mult) / div;
}
- account_system_time(tsk, 0, system);
+ account_system_time(tsk, 0, cputime_to_nsecs(system));
tsk->stimescaled += cputime_to_nsecs(system_scaled);
virt_timer_forward(system);
diff --git a/include/linux/kernel_stat.h b/include/linux/kernel_stat.h
index 07b103e..ea6f359 100644
--- a/include/linux/kernel_stat.h
+++ b/include/linux/kernel_stat.h
@@ -9,7 +9,6 @@
#include <linux/sched.h>
#include <linux/vtime.h>
#include <asm/irq.h>
-#include <linux/cputime.h>
/*
* 'kernel_stat.h' contains the definitions needed for doing
@@ -79,7 +78,7 @@ static inline unsigned int kstat_cpu_irqs_sum(unsigned int cpu)
}
extern void account_user_time(struct task_struct *, u64);
-extern void account_system_time(struct task_struct *, int, cputime_t);
+extern void account_system_time(struct task_struct *, int, 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 ac9aa7e..8d541e7 100644
--- a/kernel/sched/cputime.c
+++ b/kernel/sched/cputime.c
@@ -138,22 +138,22 @@ void account_user_time(struct task_struct *p, u64 cputime)
* @p: the process that the cpu time gets accounted to
* @cputime: the cpu time spent in virtual machine since the last update
*/
-static void account_guest_time(struct task_struct *p, cputime_t cputime)
+static void account_guest_time(struct task_struct *p, u64 cputime)
{
u64 *cpustat = kcpustat_this_cpu->cpustat;
/* Add guest time to process. */
- p->utime += cputime_to_nsecs(cputime);
- account_group_user_time(p, cputime_to_nsecs(cputime));
- p->gtime += cputime_to_nsecs(cputime);
+ p->utime += cputime;
+ account_group_user_time(p, cputime);
+ p->gtime += cputime;
/* Add guest time to cpustat. */
if (task_nice(p) > 0) {
- cpustat[CPUTIME_NICE] += cputime_to_nsecs(cputime);
- cpustat[CPUTIME_GUEST_NICE] += cputime_to_nsecs(cputime);
+ cpustat[CPUTIME_NICE] += cputime;
+ cpustat[CPUTIME_GUEST_NICE] += cputime;
} else {
- cpustat[CPUTIME_USER] += cputime_to_nsecs(cputime);
- cpustat[CPUTIME_GUEST] += cputime_to_nsecs(cputime);
+ cpustat[CPUTIME_USER] += cputime;
+ cpustat[CPUTIME_GUEST] += cputime;
}
}
@@ -164,14 +164,14 @@ static void account_guest_time(struct task_struct *p, cputime_t cputime)
* @index: pointer to cpustat field that has to be updated
*/
static inline
-void __account_system_time(struct task_struct *p, cputime_t cputime, int index)
+void __account_system_time(struct task_struct *p, u64 cputime, int index)
{
/* Add system time to process. */
- p->stime += cputime_to_nsecs(cputime);
- account_group_system_time(p, cputime_to_nsecs(cputime));
+ p->stime += cputime;
+ 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);
@@ -183,8 +183,7 @@ void __account_system_time(struct task_struct *p, cputime_t cputime, int index)
* @hardirq_offset: the offset to subtract from hardirq_count()
* @cputime: the cpu time spent in kernel space since the last update
*/
-void account_system_time(struct task_struct *p, int hardirq_offset,
- cputime_t cputime)
+void account_system_time(struct task_struct *p, int hardirq_offset, u64 cputime)
{
int index;
@@ -388,16 +387,15 @@ 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, old_cputime, CPUTIME_SOFTIRQ);
+ __account_system_time(p, cputime, CPUTIME_SOFTIRQ);
} else if (user_tick) {
account_user_time(p, cputime);
} else if (p == rq->idle) {
account_idle_time(cputime);
} else if (p->flags & PF_VCPU) { /* System time or guest time */
-
- account_guest_time(p, old_cputime);
+ account_guest_time(p, cputime);
} else {
- __account_system_time(p, old_cputime, CPUTIME_SYSTEM);
+ __account_system_time(p, cputime, CPUTIME_SYSTEM);
}
}
@@ -504,7 +502,7 @@ void account_process_tick(struct task_struct *p, int user_tick)
if (user_tick)
account_user_time(p, cputime);
else if ((p != rq->idle) || (irq_count() != HARDIRQ_OFFSET))
- account_system_time(p, HARDIRQ_OFFSET, old_cputime);
+ account_system_time(p, HARDIRQ_OFFSET, cputime);
else
account_idle_time(cputime);
}
@@ -724,7 +722,7 @@ static void __vtime_account_system(struct task_struct *tsk)
{
cputime_t delta_cpu = get_vtime_delta(tsk);
- account_system_time(tsk, irq_count(), delta_cpu);
+ account_system_time(tsk, irq_count(), cputime_to_nsecs(delta_cpu));
}
void vtime_account_system(struct task_struct *tsk)
--
2.7.4
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