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-rw-r--r--include/linux/tracepoint.h3
-rw-r--r--include/trace/sched_event_types.h48
2 files changed, 35 insertions, 16 deletions
diff --git a/include/linux/tracepoint.h b/include/linux/tracepoint.h
index 3bcc3e17144..6b4f1bb3701 100644
--- a/include/linux/tracepoint.h
+++ b/include/linux/tracepoint.h
@@ -160,4 +160,7 @@ static inline void tracepoint_synchronize_unregister(void)
#define TRACE_EVENT_FORMAT(name, proto, args, fmt, struct, tpfmt) \
TRACE_FORMAT(name, PARAMS(proto), PARAMS(args), PARAMS(fmt))
+#define TRACE_EVENT(name, proto, args, struct, print, assign) \
+ DECLARE_TRACE(name, PARAMS(proto), PARAMS(args))
+
#endif
diff --git a/include/trace/sched_event_types.h b/include/trace/sched_event_types.h
index 71b14828a95..aa77fb75403 100644
--- a/include/trace/sched_event_types.h
+++ b/include/trace/sched_event_types.h
@@ -62,25 +62,41 @@ TRACE_EVENT_FORMAT(sched_wakeup_new,
TP_RAW_FMT("task %d success=%d")
);
-TRACE_EVENT_FORMAT(sched_switch,
+/*
+ * Tracepoint for task switches, performed by the scheduler:
+ *
+ * (NOTE: the 'rq' argument is not used by generic trace events,
+ * but used by the latency tracer plugin. )
+ */
+TRACE_EVENT(sched_switch,
+
TP_PROTO(struct rq *rq, struct task_struct *prev,
- struct task_struct *next),
+ struct task_struct *next),
+
TP_ARGS(rq, prev, next),
- TP_FMT("task %s:%d ==> %s:%d",
- prev->comm, prev->pid, next->comm, next->pid),
- TRACE_STRUCT(
- TRACE_FIELD(pid_t, prev_pid, prev->pid)
- TRACE_FIELD(int, prev_prio, prev->prio)
- TRACE_FIELD_SPECIAL(char next_comm[TASK_COMM_LEN],
- next_comm,
- TP_CMD(memcpy(TRACE_ENTRY->next_comm,
- next->comm,
- TASK_COMM_LEN)))
- TRACE_FIELD(pid_t, next_pid, next->pid)
- TRACE_FIELD(int, next_prio, next->prio)
+
+ TP_STRUCT__entry(
+ __array( char, prev_comm, TASK_COMM_LEN )
+ __field( pid_t, prev_pid )
+ __field( int, prev_prio )
+ __array( char, next_comm, TASK_COMM_LEN )
+ __field( pid_t, next_pid )
+ __field( int, next_prio )
),
- TP_RAW_FMT("prev %d:%d ==> next %s:%d:%d")
- );
+
+ TP_printk("task %s:%d [%d] ==> %s:%d [%d]",
+ __entry->prev_comm, __entry->prev_pid, __entry->prev_prio,
+ __entry->next_comm, __entry->next_pid, __entry->next_prio),
+
+ TP_fast_assign(
+ memcpy(__entry->next_comm, next->comm, TASK_COMM_LEN);
+ __entry->prev_pid = prev->pid;
+ __entry->prev_prio = prev->prio;
+ memcpy(__entry->prev_comm, prev->comm, TASK_COMM_LEN);
+ __entry->next_pid = next->pid;
+ __entry->next_prio = next->prio;
+ )
+);
TRACE_EVENT_FORMAT(sched_migrate_task,
TP_PROTO(struct task_struct *p, int orig_cpu, int dest_cpu),