From: gaoxiang17 <gaoxian...@xiaomi.com>
Sometimes, when analyzing some real-time process issues, it is necessary to
know the sched policy.
Show up in the trace as:
72.267374: sched_switch: prev_comm=grep prev_pid=67 prev_prio=19
prev_state=S ==> next_comm=cat next_pid=66 next_prio=120 next_policy=normal
72.267594: sched_switch: prev_comm=cat prev_pid=66 prev_prio=120
prev_state=R+ ==> next_comm=grep next_pid=67 next_prio=19 next_policy=RR
562.192567: sched_switch: prev_comm=grep prev_pid=85 prev_prio=19
prev_state=S ==> next_comm=cat next_pid=84 next_prio=120 next_policy=normal
562.192944: sched_switch: prev_comm=cat prev_pid=84 prev_prio=120
prev_state=R+ ==> next_comm=grep next_pid=85 next_prio=19 next_policy=FIFO
Signed-off-by: gaoxiang17 <gaoxian...@xiaomi.com>
---
include/trace/events/sched.h | 15 +++++++++++++--
1 file changed, 13 insertions(+), 2 deletions(-)
diff --git a/include/trace/events/sched.h b/include/trace/events/sched.h
index 7b2645b50e78..00336211aca6 100644
--- a/include/trace/events/sched.h
+++ b/include/trace/events/sched.h
@@ -234,6 +234,7 @@ TRACE_EVENT(sched_switch,
__array( char, next_comm, TASK_COMM_LEN )
__field( pid_t, next_pid )
__field( int, next_prio )
+ __field( unsigned int, next_policy )
),
TP_fast_assign(
@@ -244,10 +245,11 @@ TRACE_EVENT(sched_switch,
memcpy(__entry->next_comm, next->comm, TASK_COMM_LEN);
__entry->next_pid = next->pid;
__entry->next_prio = next->prio;
+ __entry->next_policy = next->policy;
/* XXX SCHED_DEADLINE */
),
- TP_printk("prev_comm=%s prev_pid=%d prev_prio=%d prev_state=%s%s ==>
next_comm=%s next_pid=%d next_prio=%d",
+ TP_printk("prev_comm=%s prev_pid=%d prev_prio=%d prev_state=%s%s ==>
next_comm=%s next_pid=%d next_prio=%d next_policy=%s",
__entry->prev_comm, __entry->prev_pid, __entry->prev_prio,
(__entry->prev_state & (TASK_REPORT_MAX - 1)) ?
@@ -263,7 +265,16 @@ TRACE_EVENT(sched_switch,
"R",
__entry->prev_state & TASK_REPORT_MAX ? "+" : "",
- __entry->next_comm, __entry->next_pid, __entry->next_prio)
+ __entry->next_comm, __entry->next_pid, __entry->next_prio,
+ __print_symbolic(__entry->next_policy,
+ { SCHED_NORMAL, "normal" },
+ { SCHED_FIFO, "FIFO" },
+ { SCHED_RR, "RR" },
+ { SCHED_BATCH, "batch" },
+ { SCHED_IDLE, "idle" },
+ { SCHED_DEADLINE, "deadline" },
+ { SCHED_EXT, "sched_ext"})
+ )
);
/*
--
2.34.1
