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| author | Paul E. McKenney <paul.mckenney@linaro.org> | 2012-02-23 15:58:29 -0800 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2012-04-24 20:55:19 -0700 |
| commit | 2fdbb31b662787f78bb78b3e4e18f1a072058ffc (patch) | |
| tree | c8dbe70ab53102acf7f802eb50c5262c82cd45aa | |
| parent | 66f75a5d028beaf67c931435fdc3e7823125730c (diff) | |
| download | linux-2fdbb31b662787f78bb78b3e4e18f1a072058ffc.tar.gz linux-2fdbb31b662787f78bb78b3e4e18f1a072058ffc.tar.bz2 linux-2fdbb31b662787f78bb78b3e4e18f1a072058ffc.zip | |
rcu: Add RCU_FAST_NO_HZ tracing for idle exit
Traces of rcu_prep_idle events can be confusing because
rcu_cleanup_after_idle() does no tracing. This commit therefore adds
this tracing.
Signed-off-by: Paul E. McKenney <paul.mckenney@linaro.org>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
| -rw-r--r-- | include/trace/events/rcu.h | 1 | ||||
| -rw-r--r-- | kernel/rcutree_plugin.h | 1 |
2 files changed, 2 insertions, 0 deletions
diff --git a/include/trace/events/rcu.h b/include/trace/events/rcu.h index 337099783f37..aaa55e1b8c48 100644 --- a/include/trace/events/rcu.h +++ b/include/trace/events/rcu.h @@ -292,6 +292,7 @@ TRACE_EVENT(rcu_dyntick, * "More callbacks": Still more callbacks, try again to clear them out. * "Callbacks drained": All callbacks processed, off to dyntick idle! * "Timer": Timer fired to cause CPU to continue processing callbacks. + * "Cleanup after idle": Idle exited, timer canceled. */ TRACE_EVENT(rcu_prep_idle, diff --git a/kernel/rcutree_plugin.h b/kernel/rcutree_plugin.h index c023464816be..1e561ab952a3 100644 --- a/kernel/rcutree_plugin.h +++ b/kernel/rcutree_plugin.h @@ -2085,6 +2085,7 @@ static void rcu_prepare_for_idle_init(int cpu) static void rcu_cleanup_after_idle(int cpu) { hrtimer_cancel(&per_cpu(rcu_idle_gp_timer, cpu)); + trace_rcu_prep_idle("Cleanup after idle"); } /* |