[tip:sched/core] sched/cputime: Push time to account_system_time() in nsecs

tip-bot for Frederic Weisbecker
2017-02-01T10:03:17Z

Commit-ID: fb8b049c988f1ff460b063b8a41ea9a3c79921c2
Gitweb: http://git.kernel.org/tip/fb8b049c988f1ff460b063b8a41ea9a3c79921c2
Author: Frederic Weisbecker <fweisbec@gmail.com>
AuthorDate: Tue, 31 Jan 2017 04:09:40 +0100
Committer: Ingo Molnar <mingo@kernel.org>
CommitDate: Wed, 1 Feb 2017 09:13:58 +0100

sched/cputime: Push time to account_system_time() in nsecs

This is one more step toward converting cputime accounting to pure nsecs.

Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rik van Riel <riel@redhat.com>
Cc: Stanislaw Gruszka <sgruszka@redhat.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Wanpeng Li <wanpeng.li@hotmail.com>
Link: http://lkml.kernel.org/r/1485832191-26889-25-git-send-email-fweisbec@gmail.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
---
arch/ia64/kernel/time.c | 11 ++++++-----
arch/powerpc/kernel/time.c | 15 ++++++++-------
arch/s390/kernel/idle.c | 2 +-
arch/s390/kernel/vtime.c | 6 +++---
include/linux/kernel_stat.h | 7 +++----
kernel/sched/cputime.c | 39 +++++++++++++++++++--------------------
6 files changed, 40 insertions(+), 40 deletions(-)

diff --git a/arch/ia64/kernel/time.c b/arch/ia64/kernel/time.c
index 5dc801d..f15bca4 100644
--- a/arch/ia64/kernel/time.c
+++ b/arch/ia64/kernel/time.c
@@ -21,6 +21,7 @@
#include <linux/timex.h>
#include <linux/timekeeper_internal.h>
#include <linux/platform_device.h>
+#include <linux/cputime.h>

#include <asm/machvec.h>
#include <asm/delay.h>
@@ -64,29 +65,29 @@ extern cputime_t cycle_to_cputime(u64 cyc);
void vtime_flush(struct task_struct *tsk)
{
struct thread_info *ti = task_thread_info(tsk);
- cputime_t delta;
+ u64 delta;

if (ti->utime)
account_user_time(tsk, cputime_to_nsecs(cycle_to_cputime(ti->utime)));

if (ti->gtime)
- account_guest_time(tsk, cycle_to_cputime(ti->gtime));
+ account_guest_time(tsk, cputime_to_nsecs(cycle_to_cputime(ti->gtime)));

if (ti->idle_time)
account_idle_time(cputime_to_nsecs(cycle_to_cputime(ti->idle_time)));

if (ti->stime) {
- delta = cycle_to_cputime(ti->stime);
+ delta = cputime_to_nsecs(cycle_to_cputime(ti->stime));
account_system_index_time(tsk, delta, CPUTIME_SYSTEM);
}

if (ti->hardirq_time) {
- delta = cycle_to_cputime(ti->hardirq_time);
+ delta = cputime_to_nsecs(cycle_to_cputime(ti->hardirq_time));
account_system_index_time(tsk, delta, CPUTIME_IRQ);
}

if (ti->softirq_time) {
- delta = cycle_to_cputime(ti->softirq_time);
+ delta = cputime_to_nsecs(cycle_to_cputime(ti->softirq_time));
account_system_index_time(tsk, delta, CPUTIME_SOFTIRQ);
}

diff --git a/arch/powerpc/kernel/time.c b/arch/powerpc/kernel/time.c
index 739897a..01f53bf 100644
--- a/arch/powerpc/kernel/time.c
+++ b/arch/powerpc/kernel/time.c
@@ -57,6 +57,7 @@
#include <linux/clk-provider.h>
#include <linux/suspend.h>
#include <linux/rtc.h>
+#include <linux/cputime.h>
#include <asm/trace.h>

#include <asm/io.h>
@@ -72,7 +73,6 @@
#include <asm/smp.h>
#include <asm/vdso_datapage.h>
#include <asm/firmware.h>
-#include <asm/cputime.h>
#include <asm/asm-prototypes.h>

/* powerpc clocksource/clockevent code */
@@ -399,7 +399,7 @@ void vtime_flush(struct task_struct *tsk)
tsk->utimescaled += cputime_to_nsecs(acct->utime_scaled);

if (acct->gtime)
- account_guest_time(tsk, acct->gtime);
+ account_guest_time(tsk, cputime_to_nsecs(acct->gtime));

if (acct->steal_time)
account_steal_time(cputime_to_nsecs(acct->steal_time));
@@ -408,16 +408,17 @@ void vtime_flush(struct task_struct *tsk)
account_idle_time(cputime_to_nsecs(acct->idle_time));

if (acct->stime)
- account_system_index_time(tsk, acct->stime, CPUTIME_SYSTEM);
-
+ account_system_index_time(tsk, cputime_to_nsecs(acct->stime),
+ CPUTIME_SYSTEM);
if (acct->stime_scaled)
tsk->stimescaled += cputime_to_nsecs(acct->stime_scaled);

if (acct->hardirq_time)
- account_system_index_time(tsk, acct->hardirq_time, CPUTIME_IRQ);
-
+ account_system_index_time(tsk, cputime_to_nsecs(acct->hardirq_time),
+ CPUTIME_IRQ);
if (acct->softirq_time)
- account_system_index_time(tsk, acct->softirq_time, CPUTIME_SOFTIRQ);
+ account_system_index_time(tsk, cputime_to_nsecs(acct->softirq_time),
+ CPUTIME_SOFTIRQ);

acct->utime = 0;
acct->utime_scaled = 0;
diff --git a/arch/s390/kernel/idle.c b/arch/s390/kernel/idle.c
index 99f1d81..5c0e08e7 100644
--- a/arch/s390/kernel/idle.c
+++ b/arch/s390/kernel/idle.c
@@ -12,7 +12,7 @@
#include <linux/notifier.h>
#include <linux/init.h>
#include <linux/cpu.h>
-#include <asm/cputime.h>
+#include <linux/cputime.h>
#include <asm/nmi.h>
#include <asm/smp.h>
#include "entry.h"
diff --git a/arch/s390/kernel/vtime.c b/arch/s390/kernel/vtime.c
index 1e7023c..b4a3e9e 100644
--- a/arch/s390/kernel/vtime.c
+++ b/arch/s390/kernel/vtime.c
@@ -6,13 +6,13 @@
*/

#include <linux/kernel_stat.h>
+#include <linux/cputime.h>
#include <linux/export.h>
#include <linux/kernel.h>
#include <linux/timex.h>
#include <linux/types.h>
#include <linux/time.h>

-#include <asm/cputime.h>
#include <asm/vtimer.h>
#include <asm/vtime.h>
#include <asm/cpu_mf.h>
@@ -115,7 +115,7 @@ static void account_system_index_scaled(struct task_struct *p,
enum cpu_usage_stat index)
{
p->stimescaled += cputime_to_nsecs(scaled);
- account_system_index_time(p, cputime, index);
+ account_system_index_time(p, cputime_to_nsecs(cputime), index);
}

/*
@@ -171,7 +171,7 @@ static int do_account_vtime(struct task_struct *tsk)
}

if (guest) {
- account_guest_time(tsk, guest);
+ account_guest_time(tsk, cputime_to_nsecs(guest));
tsk->utimescaled += cputime_to_nsecs(scale_vtime(guest));
}

diff --git a/include/linux/kernel_stat.h b/include/linux/kernel_stat.h
index e1cd897..66be8b6 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
@@ -79,9 +78,9 @@ static inline unsigned int kstat_cpu_irqs_sum(unsigned int cpu)
}

extern void account_user_time(struct task_struct *, u64);
-extern void account_guest_time(struct task_struct *, cputime_t);
-extern void account_system_time(struct task_struct *, int, cputime_t);
-extern void account_system_index_time(struct task_struct *, cputime_t,
+extern void account_guest_time(struct task_struct *, u64);
+extern void account_system_time(struct task_struct *, int, u64);
+extern void account_system_index_time(struct task_struct *, u64,
enum cpu_usage_stat);
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 fd5375f..d28e9c5 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/cputime.h>
#include "sched.h"
#ifdef CONFIG_PARAVIRT
#include <asm/paravirt.h>
@@ -138,22 +139,22 @@ 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
*/
-void account_guest_time(struct task_struct *p, cputime_t cputime)
+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 +165,14 @@ void account_guest_time(struct task_struct *p, cputime_t cputime)
* @index: pointer to cpustat field that has to be updated
*/
void account_system_index_time(struct task_struct *p,
- cputime_t cputime, enum cpu_usage_stat index)
+ u64 cputime, enum cpu_usage_stat 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 +184,7 @@ void account_system_index_time(struct task_struct *p,
* @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 +388,15 @@ 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_index_time(p, old_cputime, CPUTIME_SOFTIRQ);
+ account_system_index_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_index_time(p, old_cputime, CPUTIME_SYSTEM);
+ account_system_index_time(p, cputime, CPUTIME_SYSTEM);
}
}

@@ -502,7 +501,7 @@ 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);
}
@@ -722,7 +721,7 @@ 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)