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authorIngo Molnar <mingo@kernel.org>2017-02-05 11:48:36 +0100
committerIngo Molnar <mingo@kernel.org>2017-03-03 01:45:22 +0100
commit1050b27c52f615bc0e772b3119881e5304ccde6b (patch)
tree9c405a8476785b37476af3ab533eff5e3086a63a /kernel/sched/stats.h
parent56cd697366b6d6f67acb6c58ac7f3b185d11ef07 (diff)
sched/headers: Move cputime functionality from <linux/sched.h> and <linux/cputime.h> into <linux/sched/cputime.h>
Move cputime related functionality out of <linux/sched.h>, as most code that includes <linux/sched.h> does not use that functionality. Move data types that are not included in task_struct directly to the signal definitions, into <linux/sched/signal.h>. Also merge the (small) existing <linux/cputime.h> header into <linux/sched/cputime.h>. Acked-by: Linus Torvalds <torvalds@linux-foundation.org> Cc: Mike Galbraith <efault@gmx.de> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'kernel/sched/stats.h')
-rw-r--r--kernel/sched/stats.h111
1 files changed, 0 insertions, 111 deletions
diff --git a/kernel/sched/stats.h b/kernel/sched/stats.h
index bf0da0aa0a14..d5710651043b 100644
--- a/kernel/sched/stats.h
+++ b/kernel/sched/stats.h
@@ -164,114 +164,3 @@ sched_info_switch(struct rq *rq,
#define sched_info_arrive(rq, next) do { } while (0)
#define sched_info_switch(rq, t, next) do { } while (0)
#endif /* CONFIG_SCHED_INFO */
-
-/*
- * The following are functions that support scheduler-internal time accounting.
- * These functions are generally called at the timer tick. None of this depends
- * on CONFIG_SCHEDSTATS.
- */
-
-/**
- * get_running_cputimer - return &tsk->signal->cputimer if cputimer is running
- *
- * @tsk: Pointer to target task.
- */
-#ifdef CONFIG_POSIX_TIMERS
-static inline
-struct thread_group_cputimer *get_running_cputimer(struct task_struct *tsk)
-{
- struct thread_group_cputimer *cputimer = &tsk->signal->cputimer;
-
- /* Check if cputimer isn't running. This is accessed without locking. */
- if (!READ_ONCE(cputimer->running))
- return NULL;
-
- /*
- * After we flush the task's sum_exec_runtime to sig->sum_sched_runtime
- * in __exit_signal(), we won't account to the signal struct further
- * cputime consumed by that task, even though the task can still be
- * ticking after __exit_signal().
- *
- * In order to keep a consistent behaviour between thread group cputime
- * and thread group cputimer accounting, lets also ignore the cputime
- * elapsing after __exit_signal() in any thread group timer running.
- *
- * This makes sure that POSIX CPU clocks and timers are synchronized, so
- * that a POSIX CPU timer won't expire while the corresponding POSIX CPU
- * clock delta is behind the expiring timer value.
- */
- if (unlikely(!tsk->sighand))
- return NULL;
-
- return cputimer;
-}
-#else
-static inline
-struct thread_group_cputimer *get_running_cputimer(struct task_struct *tsk)
-{
- return NULL;
-}
-#endif
-
-/**
- * account_group_user_time - Maintain utime for a thread group.
- *
- * @tsk: Pointer to task structure.
- * @cputime: Time value by which to increment the utime field of the
- * thread_group_cputime structure.
- *
- * If thread group time is being maintained, get the structure for the
- * running CPU and update the utime field there.
- */
-static inline void account_group_user_time(struct task_struct *tsk,
- u64 cputime)
-{
- struct thread_group_cputimer *cputimer = get_running_cputimer(tsk);
-
- if (!cputimer)
- return;
-
- atomic64_add(cputime, &cputimer->cputime_atomic.utime);
-}
-
-/**
- * account_group_system_time - Maintain stime for a thread group.
- *
- * @tsk: Pointer to task structure.
- * @cputime: Time value by which to increment the stime field of the
- * thread_group_cputime structure.
- *
- * If thread group time is being maintained, get the structure for the
- * running CPU and update the stime field there.
- */
-static inline void account_group_system_time(struct task_struct *tsk,
- u64 cputime)
-{
- struct thread_group_cputimer *cputimer = get_running_cputimer(tsk);
-
- if (!cputimer)
- return;
-
- atomic64_add(cputime, &cputimer->cputime_atomic.stime);
-}
-
-/**
- * account_group_exec_runtime - Maintain exec runtime for a thread group.
- *
- * @tsk: Pointer to task structure.
- * @ns: Time value by which to increment the sum_exec_runtime field
- * of the thread_group_cputime structure.
- *
- * If thread group time is being maintained, get the structure for the
- * running CPU and update the sum_exec_runtime field there.
- */
-static inline void account_group_exec_runtime(struct task_struct *tsk,
- unsigned long long ns)
-{
- struct thread_group_cputimer *cputimer = get_running_cputimer(tsk);
-
- if (!cputimer)
- return;
-
- atomic64_add(ns, &cputimer->cputime_atomic.sum_exec_runtime);
-}