[RFC][PATCH v1 04/15] perf: export tracepoint events via sysfs: sched, raw_syscalls etc.
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From: Lin Ming on 22 Jul 2010 07:20 Below tracepoint events are exported under /sys/kernel/events/. sched, raw_syscalls, irq, timer, signal, workqueue, lock and bkl For example, /sys/kernel/events/ |-- hrtimer_cancel | |-- config | `-- type |-- hrtimer_expire_entry | |-- config | `-- type |-- hrtimer_expire_exit | |-- config | `-- type |-- hrtimer_init | |-- config | `-- type |-- hrtimer_start | |-- config | `-- type |-- irq_handler_entry | |-- config | `-- type |-- irq_handler_exit | |-- config | `-- type |-- itimer_expire | |-- config | `-- type |-- itimer_state | |-- config | `-- type |-- lock_kernel | |-- config | `-- type |-- sched_kthread_stop | |-- config | `-- type |-- sched_kthread_stop_ret | |-- config | `-- type |-- sched_migrate_task | |-- config | `-- type |-- sched_process_exit | |-- config | `-- type |-- sched_process_fork | |-- config | `-- type |-- sched_process_free | |-- config | `-- type |-- sched_process_wait | |-- config | `-- type |-- sched_stat_iowait | |-- config | `-- type |-- sched_stat_runtime | |-- config | `-- type |-- sched_stat_sleep | |-- config | `-- type |-- sched_stat_wait | |-- config | `-- type |-- sched_switch | |-- config | `-- type |-- sched_wait_task | |-- config | `-- type |-- sched_wakeup | |-- config | `-- type |-- sched_wakeup_new | |-- config | `-- type |-- signal_deliver | |-- config | `-- type |-- signal_generate | |-- config | `-- type |-- signal_lose_info | |-- config | `-- type |-- signal_overflow_fail | |-- config | `-- type |-- softirq_entry | |-- config | `-- type |-- softirq_exit | |-- config | `-- type |-- sys_enter | |-- config | `-- type |-- sys_exit | |-- config | `-- type |-- timer_cancel | |-- config | `-- type |-- timer_expire_entry | |-- config | `-- type |-- timer_expire_exit | |-- config | `-- type |-- timer_init | |-- config | `-- type |-- timer_start | |-- config | `-- type |-- unlock_kernel | |-- config | `-- type |-- workqueue_creation | |-- config | `-- type |-- workqueue_destruction | |-- config | `-- type |-- workqueue_execution | |-- config | `-- type `-- workqueue_insertion |-- config `-- type --- include/linux/perf_event.h | 4 +++ kernel/perf_event.c | 50 ++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 54 insertions(+), 0 deletions(-) diff --git a/include/linux/perf_event.h b/include/linux/perf_event.h index fb2ec23..c24197d 100644 --- a/include/linux/perf_event.h +++ b/include/linux/perf_event.h @@ -1062,6 +1062,8 @@ extern void perf_event_disable(struct perf_event *event); extern struct kobject *perf_sys_create_events_dir(struct kobject *parent); extern int perf_sys_add_event(struct kobject *parent, char *name, u64 config, int type); +extern void perf_sys_add_tp_events(struct kobject *kobj, char *tp_system); +extern void perf_sys_add_tp(struct kobject *kobj, char *tp_system); extern char *perf_hw_event_name(int id); extern char *perf_hw_cache_event_name(u8 type, u8 op, u8 result); #else @@ -1108,6 +1110,8 @@ static inline struct kobject *perf_sys_create_events_dir(struct kobject *parent) { return NULL; } +static inline void perf_sys_add_tp_events(struct kobject *kobj, char *tp_system) { } +static inline void perf_sys_add_tp(struct kobject *kobj, char *tp_system) { } static inline char *perf_hw_event_name(int id) { return NULL; } static inline char *perf_hw_cache_event_name(u8 type, u8 op, u8 result) { return NULL; } #endif diff --git a/kernel/perf_event.c b/kernel/perf_event.c index 21c359d..554311b 100644 --- a/kernel/perf_event.c +++ b/kernel/perf_event.c @@ -5921,6 +5921,26 @@ static struct attribute_group perfclass_attr_group = { .name = "perf_events", }; +/* + * tracepoint events: sched, raw_syscalls, irq, timer, signal, + * workqueue, lock and bkl are exported to + * /sys/kernel/events/ + */ +static void perf_sys_add_kernel_events(void) +{ + if (!sys_kernel_events_kobj) + return; + + perf_sys_add_tp_events(sys_kernel_events_kobj, "raw_syscalls"); + perf_sys_add_tp_events(sys_kernel_events_kobj, "sched"); + perf_sys_add_tp_events(sys_kernel_events_kobj, "irq"); + perf_sys_add_tp_events(sys_kernel_events_kobj, "timer"); + perf_sys_add_tp_events(sys_kernel_events_kobj, "signal"); + perf_sys_add_tp_events(sys_kernel_events_kobj, "workqueue"); + perf_sys_add_tp_events(sys_kernel_events_kobj, "lock"); + perf_sys_add_tp_events(sys_kernel_events_kobj, "bkl"); +} + static int __init perf_event_sysfs_init(void) { struct pmu *pmu = NULL; @@ -5928,6 +5948,8 @@ static int __init perf_event_sysfs_init(void) sys_kernel_events_kobj = perf_sys_create_events_dir(kernel_kobj); + perf_sys_add_kernel_events(); + idx = srcu_read_lock(&pmus_srcu); list_for_each_entry_rcu(pmu, &pmus, entry) { if (pmu->export_events) @@ -6044,6 +6066,34 @@ int perf_sys_add_event(struct kobject *parent, char *name, u64 config, int type) return 0; } +#define for_each_event(event, start, end) \ + for (event = start; \ + (unsigned long)event < (unsigned long)end; \ + event++) + +extern struct ftrace_event_call __start_ftrace_events[]; +extern struct ftrace_event_call __stop_ftrace_events[]; + +void perf_sys_add_tp_events(struct kobject *events_kobj, char *tp_system) +{ + struct ftrace_event_call *call; + + for_each_event(call, __start_ftrace_events, __stop_ftrace_events) { + if (call->class->system && !strcmp(call->class->system, tp_system)) { + perf_sys_add_event(events_kobj, call->name, call->event.type, + PERF_TYPE_TRACEPOINT); + } + } +} + +void perf_sys_add_tp(struct kobject *parent, char *tp_system) +{ + struct kobject *events_kobj; + + events_kobj = perf_sys_create_events_dir(parent); + perf_sys_add_tp_events(events_kobj, tp_system); +} + static char *hw_event_names[] = { "cycles", "instructions", -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo(a)vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/ |