Commit-ID: e8c164954b926f06f109a42fb8595ed01275b141
Gitweb: http://git.kernel.org/tip/e8c164954b926f06f109a42fb8595ed01275b141
Author: Xie XiuQi <xiexiuqi@xxxxxxxxxx>
AuthorDate: Mon, 7 Aug 2017 16:44:22 +0800
Committer: Ingo Molnar <mingo@xxxxxxxxxx>
CommitDate: Thu, 10 Aug 2017 12:18:19 +0200
sched/debug: Show task state in /proc/sched_debug
Currently we print the runnable task in /proc/sched_debug, but
there is no task state information.
We don't know which task is in the runqueue and which task is sleeping.
Add task state in the runnable task list, like this:
runnable tasks:
S task PID tree-key switches prio wait-time sum-exec sum-sleep
-----------------------------------------------------------------------------------------------------------
S watchdog/239 1452 -11.917445 2811 0 0.000000 8.949306 0.000000 7 0 /
S migration/239 1453 20686.367740 8 0 0.000000 16215.720897 0.000000 7 0 /
S ksoftirqd/239 1454 115383.841071 12 120 0.000000 0.200683 0.000000 7 0 /
>R test 21287 4872.190970 407 120 0.000000 4874.911790 0.000000 7 0 /autogroup-150
R test 21288 4868.385454 401 120 0.000000 3672.341489 0.000000 7 0 /autogroup-150
R test 21289 4868.326776 384 120 0.000000 3424.934159 0.000000 7 0 /autogroup-150
Signed-off-by: Xie XiuQi <xiexiuqi@xxxxxxxxxx>
Signed-off-by: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx>
Cc: <cj.chengjian@xxxxxxxxxx>
Cc: <huawei.libin@xxxxxxxxxx>
Cc: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Link: http://lkml.kernel.org/r/1502095463-160172-2-git-send-email-xiexiuqi@xxxxxxxxxx
Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx>
---
kernel/sched/debug.c | 18 ++++++++++++------
1 file changed, 12 insertions(+), 6 deletions(-)
diff --git a/kernel/sched/debug.c b/kernel/sched/debug.c
index ac34511..d8d2ea2 100644
--- a/kernel/sched/debug.c
+++ b/kernel/sched/debug.c
@@ -421,13 +421,19 @@ static char *task_group_path(struct task_group *tg)
}
#endif
+static const char stat_nam[] = TASK_STATE_TO_CHAR_STR;
+
static void
print_task(struct seq_file *m, struct rq *rq, struct task_struct *p)
{
- if (rq->curr == p)
- SEQ_printf(m, "R");
- else
- SEQ_printf(m, " ");
+ unsigned long state;
+
+ if (rq->curr == p) {
+ SEQ_printf(m, ">R");
+ } else {
+ state = p->state ? __ffs(p->state) + 1 : 0;
+ SEQ_printf(m, " %c", state < sizeof(stat_nam) - 1 ? stat_nam[state] : '?');
+ }
SEQ_printf(m, "%15s %5d %9Ld.%06ld %9Ld %5d ",
p->comm, task_pid_nr(p),
@@ -456,9 +462,9 @@ static void print_rq(struct seq_file *m, struct rq *rq, int rq_cpu)
SEQ_printf(m,
"\nrunnable tasks:\n"
- " task PID tree-key switches prio"
+ " S task PID tree-key switches prio"
" wait-time sum-exec sum-sleep\n"
- "------------------------------------------------------"
+ "-------------------------------------------------------"
"----------------------------------------------------\n");
rcu_read_lock();
--
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