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authorFrederic Weisbecker <fweisbec@gmail.com>2017-01-31 04:09:40 +0100
committerIngo Molnar <mingo@kernel.org>2017-02-01 09:13:58 +0100
commitfb8b049c988f1ff460b063b8a41ea9a3c79921c2 (patch)
treea2aad5cdf6dca86c9ce41b39a5f78e15fe537b8b /kernel/sched
parent18b43a9bd7ae91185e398dd983fb4fffb9e81b3a (diff)
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>
Diffstat (limited to 'kernel/sched')
-rw-r--r--kernel/sched/cputime.c39
1 files changed, 19 insertions, 20 deletions
diff --git a/kernel/sched/cputime.c b/kernel/sched/cputime.c
index fd5375f956fe..d28e9c53727c 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)