diff options
Diffstat (limited to 'kernel')
-rw-r--r-- | kernel/sched/stats.h | 111 |
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); -} |