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| author | Steven Rostedt <srostedt@redhat.com> | 2009-05-15 10:51:13 -0400 |
|---|---|---|
| committer | Frederic Weisbecker <fweisbec@gmail.com> | 2009-05-26 20:29:19 +0200 |
| commit | 937cdb9db7f59278d0cb1582e6e64e3dfd73b4fc (patch) | |
| tree | 11ade43ae91890ad025fa97a9fd651b9149518dc | |
| parent | be74b73a57645cc253d881ab0c1014eb64b9cf22 (diff) | |
| download | linux-3.10-937cdb9db7f59278d0cb1582e6e64e3dfd73b4fc.tar.gz linux-3.10-937cdb9db7f59278d0cb1582e6e64e3dfd73b4fc.tar.bz2 linux-3.10-937cdb9db7f59278d0cb1582e6e64e3dfd73b4fc.zip | |
tracing: add previous task state info to sched switch event
It is useful to see the state of a task that is being switched out.
This patch adds the output of the state of the previous task in
the context switch event.
[ Impact: see state of switched out task in context switch ]
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
| -rw-r--r-- | include/trace/events/sched.h | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/include/trace/events/sched.h b/include/trace/events/sched.h index dd4033cf5b0..24ab5bcff7b 100644 --- a/include/trace/events/sched.h +++ b/include/trace/events/sched.h @@ -156,6 +156,7 @@ TRACE_EVENT(sched_switch, __array( char, prev_comm, TASK_COMM_LEN ) __field( pid_t, prev_pid ) __field( int, prev_prio ) + __field( long, prev_state ) __array( char, next_comm, TASK_COMM_LEN ) __field( pid_t, next_pid ) __field( int, next_prio ) @@ -165,13 +166,19 @@ TRACE_EVENT(sched_switch, memcpy(__entry->next_comm, next->comm, TASK_COMM_LEN); __entry->prev_pid = prev->pid; __entry->prev_prio = prev->prio; + __entry->prev_state = prev->state; memcpy(__entry->prev_comm, prev->comm, TASK_COMM_LEN); __entry->next_pid = next->pid; __entry->next_prio = next->prio; ), - TP_printk("task %s:%d [%d] ==> %s:%d [%d]", + TP_printk("task %s:%d [%d] (%s) ==> %s:%d [%d]", __entry->prev_comm, __entry->prev_pid, __entry->prev_prio, + __entry->prev_state ? + __print_flags(__entry->prev_state, "|", + { 1, "S"} , { 2, "D" }, { 4, "T" }, { 8, "t" }, + { 16, "Z" }, { 32, "X" }, { 64, "x" }, + { 128, "W" }) : "R", __entry->next_comm, __entry->next_pid, __entry->next_prio) ); |