forked from mirrors/linux
c89970202a
The archs that use cputime_to_nsecs() internally provide their own definition and don't need the fallback. cputime_to_usecs() unused except in this fallback, and is not defined anywhere. This removes the final remnant of the cputime_t code from the kernel. Signed-off-by: Nicholas Piggin <npiggin@gmail.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Acked-by: Alexander Gordeev <agordeev@linux.ibm.com> Link: https://lore.kernel.org/r/20221220070705.2958959-1-npiggin@gmail.com
183 lines
5 KiB
C
183 lines
5 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifndef _LINUX_SCHED_CPUTIME_H
|
|
#define _LINUX_SCHED_CPUTIME_H
|
|
|
|
#include <linux/sched/signal.h>
|
|
|
|
/*
|
|
* cputime accounting APIs:
|
|
*/
|
|
|
|
#ifdef CONFIG_VIRT_CPU_ACCOUNTING_GEN
|
|
extern bool task_cputime(struct task_struct *t,
|
|
u64 *utime, u64 *stime);
|
|
extern u64 task_gtime(struct task_struct *t);
|
|
#else
|
|
static inline bool task_cputime(struct task_struct *t,
|
|
u64 *utime, u64 *stime)
|
|
{
|
|
*utime = t->utime;
|
|
*stime = t->stime;
|
|
return false;
|
|
}
|
|
|
|
static inline u64 task_gtime(struct task_struct *t)
|
|
{
|
|
return t->gtime;
|
|
}
|
|
#endif
|
|
|
|
#ifdef CONFIG_ARCH_HAS_SCALED_CPUTIME
|
|
static inline void task_cputime_scaled(struct task_struct *t,
|
|
u64 *utimescaled,
|
|
u64 *stimescaled)
|
|
{
|
|
*utimescaled = t->utimescaled;
|
|
*stimescaled = t->stimescaled;
|
|
}
|
|
#else
|
|
static inline void task_cputime_scaled(struct task_struct *t,
|
|
u64 *utimescaled,
|
|
u64 *stimescaled)
|
|
{
|
|
task_cputime(t, utimescaled, stimescaled);
|
|
}
|
|
#endif
|
|
|
|
extern void task_cputime_adjusted(struct task_struct *p, u64 *ut, u64 *st);
|
|
extern void thread_group_cputime_adjusted(struct task_struct *p, u64 *ut, u64 *st);
|
|
extern void cputime_adjust(struct task_cputime *curr, struct prev_cputime *prev,
|
|
u64 *ut, u64 *st);
|
|
|
|
/*
|
|
* Thread group CPU time accounting.
|
|
*/
|
|
void thread_group_cputime(struct task_struct *tsk, struct task_cputime *times);
|
|
void thread_group_sample_cputime(struct task_struct *tsk, u64 *samples);
|
|
|
|
/*
|
|
* 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 cputimers are active
|
|
*
|
|
* @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 whether posix CPU timers are active. If not the thread
|
|
* group accounting is not active either. Lockless check.
|
|
*/
|
|
if (!READ_ONCE(tsk->signal->posix_cputimers.timers_active))
|
|
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);
|
|
}
|
|
|
|
static inline void prev_cputime_init(struct prev_cputime *prev)
|
|
{
|
|
#ifndef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE
|
|
prev->utime = prev->stime = 0;
|
|
raw_spin_lock_init(&prev->lock);
|
|
#endif
|
|
}
|
|
|
|
extern unsigned long long
|
|
task_sched_runtime(struct task_struct *task);
|
|
|
|
#endif /* _LINUX_SCHED_CPUTIME_H */
|