[tip/core/rcu,6/8] rcu: Update descriptions for rcu_nocb_wake tracepoint
diff mbox series

Message ID 20191003013305.12854-6-paulmck@kernel.org
State New
Headers show
Series
  • Fixes for v5.5
Related show

Commit Message

Paul E. McKenney Oct. 3, 2019, 1:33 a.m. UTC
From: "Paul E. McKenney" <paulmck@linux.ibm.com>

Signed-off-by: Paul E. McKenney <paulmck@linux.ibm.com>
---
 include/trace/events/rcu.h | 35 +++++++++++++++++++++--------------
 1 file changed, 21 insertions(+), 14 deletions(-)

Patch
diff mbox series

diff --git a/include/trace/events/rcu.h b/include/trace/events/rcu.h
index afa8985..4609f2e 100644
--- a/include/trace/events/rcu.h
+++ b/include/trace/events/rcu.h
@@ -258,20 +258,27 @@  TRACE_EVENT_RCU(rcu_exp_funnel_lock,
  * the number of the offloaded CPU are extracted.  The third and final
  * argument is a string as follows:
  *
- *	"WakeEmpty": Wake rcuo kthread, first CB to empty list.
- *	"WakeEmptyIsDeferred": Wake rcuo kthread later, first CB to empty list.
- *	"WakeOvf": Wake rcuo kthread, CB list is huge.
- *	"WakeOvfIsDeferred": Wake rcuo kthread later, CB list is huge.
- *	"WakeNot": Don't wake rcuo kthread.
- *	"WakeNotPoll": Don't wake rcuo kthread because it is polling.
- *	"DeferredWake": Carried out the "IsDeferred" wakeup.
- *	"Poll": Start of new polling cycle for rcu_nocb_poll.
- *	"Sleep": Sleep waiting for GP for !rcu_nocb_poll.
- *	"CBSleep": Sleep waiting for CBs for !rcu_nocb_poll.
- *	"WokeEmpty": rcuo kthread woke to find empty list.
- *	"WokeNonEmpty": rcuo kthread woke to find non-empty list.
- *	"WaitQueue": Enqueue partially done, timed wait for it to complete.
- *	"WokeQueue": Partial enqueue now complete.
+ * "AlreadyAwake": The to-be-awakened rcuo kthread is already awake.
+ * "Bypass": rcuo GP kthread sees non-empty ->nocb_bypass.
+ * "CBSleep": rcuo CB kthread sleeping waiting for CBs.
+ * "Check": rcuo GP kthread checking specified CPU for work.
+ * "DeferredWake": Timer expired or polled check, time to wake.
+ * "DoWake": The to-be-awakened rcuo kthread needs to be awakened.
+ * "EndSleep": Done waiting for GP for !rcu_nocb_poll.
+ * "FirstBQ": New CB to empty ->nocb_bypass (->cblist maybe non-empty).
+ * "FirstBQnoWake": FirstBQ plus rcuo kthread need not be awakened.
+ * "FirstBQwake": FirstBQ plus rcuo kthread must be awakened.
+ * "FirstQ": New CB to empty ->cblist (->nocb_bypass maybe non-empty).
+ * "NeedWaitGP": rcuo GP kthread must wait on a grace period.
+ * "Poll": Start of new polling cycle for rcu_nocb_poll.
+ * "Sleep": Sleep waiting for GP for !rcu_nocb_poll.
+ * "Timer": Deferred-wake timer expired.
+ * "WakeEmptyIsDeferred": Wake rcuo kthread later, first CB to empty list.
+ * "WakeEmpty": Wake rcuo kthread, first CB to empty list.
+ * "WakeNot": Don't wake rcuo kthread.
+ * "WakeNotPoll": Don't wake rcuo kthread because it is polling.
+ * "WakeOvfIsDeferred": Wake rcuo kthread later, CB list is huge.
+ * "WokeEmpty": rcuo CB kthread woke to find empty list.
  */
 TRACE_EVENT_RCU(rcu_nocb_wake,