diff options
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/context_tracking.h | 30 | ||||
| -rw-r--r-- | include/linux/context_tracking_state.h | 21 | ||||
| -rw-r--r-- | include/linux/kernel_stat.h | 11 | ||||
| -rw-r--r-- | include/linux/sched.h | 9 | ||||
| -rw-r--r-- | include/linux/tick.h | 2 | ||||
| -rw-r--r-- | include/linux/vtime.h | 59 |
6 files changed, 77 insertions, 55 deletions
diff --git a/include/linux/context_tracking.h b/include/linux/context_tracking.h index d05609ad329d..64ec82851aa3 100644 --- a/include/linux/context_tracking.h +++ b/include/linux/context_tracking.h @@ -22,26 +22,26 @@ extern void context_tracking_user_exit(void); static inline void user_enter(void) { - if (context_tracking_is_enabled()) + if (context_tracking_enabled()) context_tracking_enter(CONTEXT_USER); } static inline void user_exit(void) { - if (context_tracking_is_enabled()) + if (context_tracking_enabled()) context_tracking_exit(CONTEXT_USER); } /* Called with interrupts disabled. */ static inline void user_enter_irqoff(void) { - if (context_tracking_is_enabled()) + if (context_tracking_enabled()) __context_tracking_enter(CONTEXT_USER); } static inline void user_exit_irqoff(void) { - if (context_tracking_is_enabled()) + if (context_tracking_enabled()) __context_tracking_exit(CONTEXT_USER); } @@ -49,7 +49,7 @@ static inline enum ctx_state exception_enter(void) { enum ctx_state prev_ctx; - if (!context_tracking_is_enabled()) + if (!context_tracking_enabled()) return 0; prev_ctx = this_cpu_read(context_tracking.state); @@ -61,7 +61,7 @@ static inline enum ctx_state exception_enter(void) static inline void exception_exit(enum ctx_state prev_ctx) { - if (context_tracking_is_enabled()) { + if (context_tracking_enabled()) { if (prev_ctx != CONTEXT_KERNEL) context_tracking_enter(prev_ctx); } @@ -77,7 +77,7 @@ static inline void exception_exit(enum ctx_state prev_ctx) */ static inline enum ctx_state ct_state(void) { - return context_tracking_is_enabled() ? + return context_tracking_enabled() ? this_cpu_read(context_tracking.state) : CONTEXT_DISABLED; } #else @@ -90,7 +90,7 @@ static inline void exception_exit(enum ctx_state prev_ctx) { } static inline enum ctx_state ct_state(void) { return CONTEXT_DISABLED; } #endif /* !CONFIG_CONTEXT_TRACKING */ -#define CT_WARN_ON(cond) WARN_ON(context_tracking_is_enabled() && (cond)) +#define CT_WARN_ON(cond) WARN_ON(context_tracking_enabled() && (cond)) #ifdef CONFIG_CONTEXT_TRACKING_FORCE extern void context_tracking_init(void); @@ -103,12 +103,12 @@ static inline void context_tracking_init(void) { } /* must be called with irqs disabled */ static inline void guest_enter_irqoff(void) { - if (vtime_accounting_cpu_enabled()) + if (vtime_accounting_enabled_this_cpu()) vtime_guest_enter(current); else current->flags |= PF_VCPU; - if (context_tracking_is_enabled()) + if (context_tracking_enabled()) __context_tracking_enter(CONTEXT_GUEST); /* KVM does not hold any references to rcu protected data when it @@ -118,16 +118,16 @@ static inline void guest_enter_irqoff(void) * one time slice). Lets treat guest mode as quiescent state, just like * we do with user-mode execution. */ - if (!context_tracking_cpu_is_enabled()) + if (!context_tracking_enabled_this_cpu()) rcu_virt_note_context_switch(smp_processor_id()); } static inline void guest_exit_irqoff(void) { - if (context_tracking_is_enabled()) + if (context_tracking_enabled()) __context_tracking_exit(CONTEXT_GUEST); - if (vtime_accounting_cpu_enabled()) + if (vtime_accounting_enabled_this_cpu()) vtime_guest_exit(current); else current->flags &= ~PF_VCPU; @@ -141,7 +141,7 @@ static inline void guest_enter_irqoff(void) * to assume that it's the stime pending cputime * to flush. */ - vtime_account_system(current); + vtime_account_kernel(current); current->flags |= PF_VCPU; rcu_virt_note_context_switch(smp_processor_id()); } @@ -149,7 +149,7 @@ static inline void guest_enter_irqoff(void) static inline void guest_exit_irqoff(void) { /* Flush the guest cputime we spent on the guest */ - vtime_account_system(current); + vtime_account_kernel(current); current->flags &= ~PF_VCPU; } #endif /* CONFIG_VIRT_CPU_ACCOUNTING_GEN */ diff --git a/include/linux/context_tracking_state.h b/include/linux/context_tracking_state.h index f128dc3be0df..e7fe6678b7ad 100644 --- a/include/linux/context_tracking_state.h +++ b/include/linux/context_tracking_state.h @@ -23,17 +23,22 @@ struct context_tracking { }; #ifdef CONFIG_CONTEXT_TRACKING -extern struct static_key_false context_tracking_enabled; +extern struct static_key_false context_tracking_key; DECLARE_PER_CPU(struct context_tracking, context_tracking); -static inline bool context_tracking_is_enabled(void) +static inline bool context_tracking_enabled(void) { - return static_branch_unlikely(&context_tracking_enabled); + return static_branch_unlikely(&context_tracking_key); } -static inline bool context_tracking_cpu_is_enabled(void) +static inline bool context_tracking_enabled_cpu(int cpu) { - return __this_cpu_read(context_tracking.active); + return context_tracking_enabled() && per_cpu(context_tracking.active, cpu); +} + +static inline bool context_tracking_enabled_this_cpu(void) +{ + return context_tracking_enabled() && __this_cpu_read(context_tracking.active); } static inline bool context_tracking_in_user(void) @@ -42,9 +47,9 @@ static inline bool context_tracking_in_user(void) } #else static inline bool context_tracking_in_user(void) { return false; } -static inline bool context_tracking_active(void) { return false; } -static inline bool context_tracking_is_enabled(void) { return false; } -static inline bool context_tracking_cpu_is_enabled(void) { return false; } +static inline bool context_tracking_enabled(void) { return false; } +static inline bool context_tracking_enabled_cpu(int cpu) { return false; } +static inline bool context_tracking_enabled_this_cpu(void) { return false; } #endif /* CONFIG_CONTEXT_TRACKING */ #endif diff --git a/include/linux/kernel_stat.h b/include/linux/kernel_stat.h index 7ee2bb43b251..79781196eb25 100644 --- a/include/linux/kernel_stat.h +++ b/include/linux/kernel_stat.h @@ -78,6 +78,17 @@ static inline unsigned int kstat_cpu_irqs_sum(unsigned int cpu) return kstat_cpu(cpu).irqs_sum; } +#ifdef CONFIG_VIRT_CPU_ACCOUNTING_GEN +extern u64 kcpustat_field(struct kernel_cpustat *kcpustat, + enum cpu_usage_stat usage, int cpu); +#else +static inline u64 kcpustat_field(struct kernel_cpustat *kcpustat, + enum cpu_usage_stat usage, int cpu) +{ + return kcpustat->cpustat[usage]; +} +#endif + extern void account_user_time(struct task_struct *, u64); extern void account_guest_time(struct task_struct *, u64); extern void account_system_time(struct task_struct *, int, u64); diff --git a/include/linux/sched.h b/include/linux/sched.h index 67a1d86981a9..84b26d38c929 100644 --- a/include/linux/sched.h +++ b/include/linux/sched.h @@ -250,16 +250,21 @@ struct prev_cputime { enum vtime_state { /* Task is sleeping or running in a CPU with VTIME inactive: */ VTIME_INACTIVE = 0, - /* Task runs in userspace in a CPU with VTIME active: */ - VTIME_USER, + /* Task is idle */ + VTIME_IDLE, /* Task runs in kernelspace in a CPU with VTIME active: */ VTIME_SYS, + /* Task runs in userspace in a CPU with VTIME active: */ + VTIME_USER, + /* Task runs as guests in a CPU with VTIME active: */ + VTIME_GUEST, }; struct vtime { seqcount_t seqcount; unsigned long long starttime; enum vtime_state state; + unsigned int cpu; u64 utime; u64 stime; u64 gtime; diff --git a/include/linux/tick.h b/include/linux/tick.h index f92a10b5e112..7e050a356cc5 100644 --- a/include/linux/tick.h +++ b/include/linux/tick.h @@ -174,7 +174,7 @@ extern cpumask_var_t tick_nohz_full_mask; static inline bool tick_nohz_full_enabled(void) { - if (!context_tracking_is_enabled()) + if (!context_tracking_enabled()) return false; return tick_nohz_full_running; diff --git a/include/linux/vtime.h b/include/linux/vtime.h index a26ed10a4eac..2cdeca062db3 100644 --- a/include/linux/vtime.h +++ b/include/linux/vtime.h @@ -11,11 +11,15 @@ struct task_struct; /* - * vtime_accounting_cpu_enabled() definitions/declarations + * vtime_accounting_enabled_this_cpu() definitions/declarations */ #if defined(CONFIG_VIRT_CPU_ACCOUNTING_NATIVE) -static inline bool vtime_accounting_cpu_enabled(void) { return true; } + +static inline bool vtime_accounting_enabled_this_cpu(void) { return true; } +extern void vtime_task_switch(struct task_struct *prev); + #elif defined(CONFIG_VIRT_CPU_ACCOUNTING_GEN) + /* * Checks if vtime is enabled on some CPU. Cputime readers want to be careful * in that case and compute the tickless cputime. @@ -24,46 +28,43 @@ static inline bool vtime_accounting_cpu_enabled(void) { return true; } */ static inline bool vtime_accounting_enabled(void) { - return context_tracking_is_enabled(); + return context_tracking_enabled(); } -static inline bool vtime_accounting_cpu_enabled(void) +static inline bool vtime_accounting_enabled_cpu(int cpu) { - if (vtime_accounting_enabled()) { - if (context_tracking_cpu_is_enabled()) - return true; - } - - return false; + return context_tracking_enabled_cpu(cpu); } -#else /* !CONFIG_VIRT_CPU_ACCOUNTING */ -static inline bool vtime_accounting_cpu_enabled(void) { return false; } -#endif +static inline bool vtime_accounting_enabled_this_cpu(void) +{ + return context_tracking_enabled_this_cpu(); +} -/* - * Common vtime APIs - */ -#ifdef CONFIG_VIRT_CPU_ACCOUNTING +extern void vtime_task_switch_generic(struct task_struct *prev); -#ifdef __ARCH_HAS_VTIME_TASK_SWITCH -extern void vtime_task_switch(struct task_struct *prev); -#else -extern void vtime_common_task_switch(struct task_struct *prev); static inline void vtime_task_switch(struct task_struct *prev) { - if (vtime_accounting_cpu_enabled()) - vtime_common_task_switch(prev); + if (vtime_accounting_enabled_this_cpu()) + vtime_task_switch_generic(prev); } -#endif /* __ARCH_HAS_VTIME_TASK_SWITCH */ - -extern void vtime_account_system(struct task_struct *tsk); -extern void vtime_account_idle(struct task_struct *tsk); #else /* !CONFIG_VIRT_CPU_ACCOUNTING */ +static inline bool vtime_accounting_enabled_cpu(int cpu) {return false; } +static inline bool vtime_accounting_enabled_this_cpu(void) { return false; } static inline void vtime_task_switch(struct task_struct *prev) { } -static inline void vtime_account_system(struct task_struct *tsk) { } + +#endif + +/* + * Common vtime APIs + */ +#ifdef CONFIG_VIRT_CPU_ACCOUNTING +extern void vtime_account_kernel(struct task_struct *tsk); +extern void vtime_account_idle(struct task_struct *tsk); +#else /* !CONFIG_VIRT_CPU_ACCOUNTING */ +static inline void vtime_account_kernel(struct task_struct *tsk) { } #endif /* !CONFIG_VIRT_CPU_ACCOUNTING */ #ifdef CONFIG_VIRT_CPU_ACCOUNTING_GEN @@ -86,7 +87,7 @@ extern void vtime_account_irq_enter(struct task_struct *tsk); static inline void vtime_account_irq_exit(struct task_struct *tsk) { /* On hard|softirq exit we always account to hard|softirq cputime */ - vtime_account_system(tsk); + vtime_account_kernel(tsk); } extern void vtime_flush(struct task_struct *tsk); #else /* !CONFIG_VIRT_CPU_ACCOUNTING_NATIVE */ |