sched,trace: Show PREEMPT_ACTIVE state in trace_sched_switch
PATCH 1/1 sched,trace: Show PREEMPT_ACTIVE state in trace_sched_switch
We had need to see the difference between scheduling a runnable task and a runnable task being involuntarily preempted.
Signed-off-by Peter Zijlstra <[email protected]>
--- include/trace/events/sched.h | 9 +++++---- 1 files changed, 5 insertions(+), 4 deletions(-)
include/trace/events/sched.h +5 -4
@@ -100,7 +100,7 @@ static inline long __trace_sched_switch_state(struct task_struct *p)* For all intents and purposes a preempted task is a running task. */ if (task_thread_info (p)->preempt_count &PREEMPT_ACTIVE ) - state =TASK_RUNNING ; + state =TASK_RUNNING |TASK_STATE_MAX ;#endif return state;
@@ -137,13 +137,14 @@ TRACE_EVENT(sched_switch, __entry->next_prio = next->prio; ), -TP_printk ("prev_comm=%s prev_pid=%d prev_prio=%d prev_state=%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" , __entry->prev_comm, __entry->prev_pid, __entry->prev_prio, - __entry->prev_state ? -__print_flags (__entry->prev_state,"|" , + __entry->prev_state & (TASK_STATE_MAX -1 ) ? +__print_flags (__entry->prev_state & (TASK_STATE_MAX -1 ),"|" , { 1, "S"} , { 2, "D" }, { 4, "T" }, { 8, "t" }, { 16, "Z" }, { 32, "X" }, { 64, "x" }, { 128, "W" }) : "R", + __entry->prev_state &TASK_STATE_MAX ?"+" :"" , __entry->next_comm, __entry->next_pid, __entry->next_prio) );