diff options
Diffstat (limited to 'include/linux/sched')
| -rw-r--r-- | include/linux/sched/cputime.h | 12 | ||||
| -rw-r--r-- | include/linux/sched/signal.h | 14 | ||||
| -rw-r--r-- | include/linux/sched/types.h | 23 |
3 files changed, 33 insertions, 16 deletions
diff --git a/include/linux/sched/cputime.h b/include/linux/sched/cputime.h index 53f883f5a2fd..6c9f19a33865 100644 --- a/include/linux/sched/cputime.h +++ b/include/linux/sched/cputime.h @@ -61,8 +61,7 @@ extern void cputime_adjust(struct task_cputime *curr, struct prev_cputime *prev, * Thread group CPU time accounting. */ void thread_group_cputime(struct task_struct *tsk, struct task_cputime *times); -void thread_group_cputimer(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. @@ -71,7 +70,7 @@ void thread_group_cputimer(struct task_struct *tsk, struct task_cputime *times); */ /** - * get_running_cputimer - return &tsk->signal->cputimer if cputimer is running + * get_running_cputimer - return &tsk->signal->cputimer if cputimers are active * * @tsk: Pointer to target task. */ @@ -81,8 +80,11 @@ 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)) + /* + * 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; /* diff --git a/include/linux/sched/signal.h b/include/linux/sched/signal.h index efd8ce7675ed..88050259c466 100644 --- a/include/linux/sched/signal.h +++ b/include/linux/sched/signal.h @@ -9,6 +9,7 @@ #include <linux/sched/task.h> #include <linux/cred.h> #include <linux/refcount.h> +#include <linux/posix-timers.h> /* * Types defining task->signal and task->sighand and APIs using them: @@ -56,18 +57,12 @@ struct task_cputime_atomic { /** * struct thread_group_cputimer - thread group interval timer counts * @cputime_atomic: atomic thread group interval timers. - * @running: true when there are timers running and - * @cputime_atomic receives updates. - * @checking_timer: true when a thread in the group is in the - * process of checking for thread group timers. * * This structure contains the version of task_cputime, above, that is * used for thread group CPU timer calculations. */ struct thread_group_cputimer { struct task_cputime_atomic cputime_atomic; - bool running; - bool checking_timer; }; struct multiprocess_signals { @@ -148,12 +143,9 @@ struct signal_struct { */ struct thread_group_cputimer cputimer; - /* Earliest-expiration cache. */ - struct task_cputime cputime_expires; - - struct list_head cpu_timers[3]; - #endif + /* Empty if CONFIG_POSIX_TIMERS=n */ + struct posix_cputimers posix_cputimers; /* PID/PID hash table linkage. */ struct pid *pids[PIDTYPE_MAX]; diff --git a/include/linux/sched/types.h b/include/linux/sched/types.h new file mode 100644 index 000000000000..3c3e049224ae --- /dev/null +++ b/include/linux/sched/types.h @@ -0,0 +1,23 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef _LINUX_SCHED_TYPES_H +#define _LINUX_SCHED_TYPES_H + +#include <linux/types.h> + +/** + * struct task_cputime - collected CPU time counts + * @stime: time spent in kernel mode, in nanoseconds + * @utime: time spent in user mode, in nanoseconds + * @sum_exec_runtime: total time spent on the CPU, in nanoseconds + * + * This structure groups together three kinds of CPU time that are tracked for + * threads and thread groups. Most things considering CPU time want to group + * these counts together and treat all three of them in parallel. + */ +struct task_cputime { + u64 stime; + u64 utime; + unsigned long long sum_exec_runtime; +}; + +#endif |