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Date: Thu, 22 Jul 2010 19:12:58 +0800
From: Lin Ming <ming.m.lin@...el.com>
To: Ingo Molnar <mingo@...e.hu>
Cc: Robert Richter <robert.richter@....com>,
Corey Ashford <cjashfor@...ux.vnet.ibm.com>,
Johannes Berg <johannes@...solutions.net>,
Peter Zijlstra <peterz@...radead.org>,
Greg KH <greg@...ah.com>,
Frederic Weisbecker <fweisbec@...il.com>,
Paul Mundt <lethal@...ux-sh.org>,
"eranian@...il.com" <eranian@...il.com>,
"Gary.Mohr@...l.com" <Gary.Mohr@...l.com>,
"arjan@...ux.intel.com" <arjan@...ux.intel.com>,
"Zhang, Yanmin" <yanmin_zhang@...ux.intel.com>,
Paul Mackerras <paulus@...ba.org>,
"David S. Miller" <davem@...emloft.net>,
Russell King <rmk+kernel@....linux.org.uk>,
Arnaldo Carvalho de Melo <acme@...hat.com>,
Will Deacon <will.deacon@....com>,
Maynard Johnson <mpjohn@...ibm.com>,
Carl Love <carll@...ibm.com>,
Kay Sievers <kay.sievers@...y.org>,
lkml <linux-kernel@...r.kernel.org>,
Thomas Gleixner <tglx@...utronix.de>,
Steven Rostedt <rostedt@...dmis.org>
Subject: [RFC][PATCH v1 04/15] perf: export tracepoint events via sysfs:
sched, raw_syscalls etc.
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",
--
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