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rcu: Update descriptions for rcu_nocb_wake tracepoint

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Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
This commit is contained in:
Paul E. McKenney 2019-08-21 10:29:06 -07:00
parent 7eb54685c6
commit d01f862068
1 changed files with 21 additions and 14 deletions
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35
include/trace/events/rcu.h
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@ -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,