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From: paulmck@kernel.org
To: rcu@vger.kernel.org
Cc: linux-kernel@vger.kernel.org, kernel-team@fb.com,
	mingo@kernel.org, jiangshanlai@gmail.com, dipankar@in.ibm.com,
	akpm@linux-foundation.org, mathieu.desnoyers@efficios.com,
	josh@joshtriplett.org, tglx@linutronix.de, peterz@infradead.org,
	rostedt@goodmis.org, dhowells@redhat.com, edumazet@google.com,
	fweisbec@gmail.com, oleg@redhat.com, joel@joelfernandes.org,
	Madhuparna Bhowmik <madhuparnabhowmik10@gmail.com>,
	"Paul E . McKenney" <paulmck@kernel.org>
Subject: [PATCH tip/core/rcu 06/26] trace: events: rcu: Change description of rcu_dyntick trace event
Date: Mon, 22 Jun 2020 17:21:27 -0700	[thread overview]
Message-ID: <20200623002147.25750-6-paulmck@kernel.org> (raw)
In-Reply-To: <20200623002128.GA25456@paulmck-ThinkPad-P72>

From: Madhuparna Bhowmik <madhuparnabhowmik10@gmail.com>

The different strings used for describing the polarity are
Start, End and StillNonIdle. Since StillIdle is not used in any trace
point for rcu_dyntick, it can be removed and StillNonIdle can be added
in the description. Because StillNonIdle is used in a few tracepoints for
rcu_dyntick.

Similarly, USER, IDLE and IRQ are used for describing context in
the rcu_dyntick tracepoints. Since, "KERNEL" is not used for any
of the rcu_dyntick tracepoints, remove it from the description.

Signed-off-by: Madhuparna Bhowmik <madhuparnabhowmik10@gmail.com>
Signed-off-by: Joel Fernandes (Google) <joel@joelfernandes.org>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
---
 include/trace/events/rcu.h | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/include/trace/events/rcu.h b/include/trace/events/rcu.h
index f9a7811..af274d1 100644
--- a/include/trace/events/rcu.h
+++ b/include/trace/events/rcu.h
@@ -435,11 +435,12 @@ TRACE_EVENT_RCU(rcu_fqs,
 #endif /* #if defined(CONFIG_TREE_RCU) */
 
 /*
- * Tracepoint for dyntick-idle entry/exit events.  These take a string
- * as argument: "Start" for entering dyntick-idle mode, "Startirq" for
- * entering it from irq/NMI, "End" for leaving it, "Endirq" for leaving it
- * to irq/NMI, "--=" for events moving towards idle, and "++=" for events
- * moving away from idle.
+ * Tracepoint for dyntick-idle entry/exit events.  These take 2 strings
+ * as argument:
+ * polarity: "Start", "End", "StillNonIdle" for entering, exiting or still not
+ *            being in dyntick-idle mode.
+ * context: "USER" or "IDLE" or "IRQ".
+ * NMIs nested in IRQs are inferred with dynticks_nesting > 1 in IRQ context.
  *
  * These events also take a pair of numbers, which indicate the nesting
  * depth before and after the event of interest, and a third number that is
-- 
2.9.5


  parent reply	other threads:[~2020-06-23  0:23 UTC|newest]

Thread overview: 34+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-06-23  0:21 [PATCH tip/core/rcu 0/26] Miscellaneous fixes for v5.9 Paul E. McKenney
2020-06-23  0:21 ` [PATCH tip/core/rcu 01/26] rcu: Initialize and destroy rcu_synchronize only when necessary paulmck
2020-06-23  0:21 ` [PATCH tip/core/rcu 02/26] mm/mmap.c: Add cond_resched() for exit_mmap() CPU stalls paulmck
2020-06-23  0:47   ` Shakeel Butt
2020-06-23  0:57     ` Paul E. McKenney
2020-06-23 19:34   ` Joel Fernandes
2020-06-23 20:55     ` Paul E. McKenney
2020-06-23 21:01       ` Joel Fernandes
2020-06-23  0:21 ` [PATCH tip/core/rcu 03/26] rcu: Simplify the calculation of rcu_state.ncpus paulmck
2020-06-23  0:21 ` [PATCH tip/core/rcu 04/26] rcu: Add callbacks-invoked counters paulmck
2020-06-23  0:21 ` [PATCH tip/core/rcu 05/26] rcu: Add comment documenting rcu_callback_map's purpose paulmck
2020-06-23  0:21 ` paulmck [this message]
2020-06-23  0:21 ` [PATCH tip/core/rcu 07/26] rcu: Grace-period-kthread related sleeps to idle priority paulmck
2020-06-23  0:21 ` [PATCH tip/core/rcu 08/26] rcu: Priority-boost-related " paulmck
2020-06-23  0:21 ` [PATCH tip/core/rcu 09/26] rcu: No-CBs-related " paulmck
2020-06-23  0:21 ` [PATCH tip/core/rcu 10/26] rcu: Expedited grace-period " paulmck
2020-06-23  0:21 ` [PATCH tip/core/rcu 11/26] fs/btrfs: Add cond_resched() for try_release_extent_mapping() stalls paulmck
2020-06-23  0:21 ` [PATCH tip/core/rcu 12/26] rcu: Update comment from rsp->rcu_gp_seq to rsp->gp_seq paulmck
2020-06-23  0:21 ` [PATCH tip/core/rcu 13/26] tick/nohz: Narrow down noise while setting current task's tick dependency paulmck
2020-06-23  0:21 ` [PATCH tip/core/rcu 14/26] rcu: fix some kernel-doc warnings paulmck
2020-06-23  0:21 ` [PATCH tip/core/rcu 15/26] rcu: Remove initialized but unused rnp from check_slow_task() paulmck
2020-06-23  0:21 ` [PATCH tip/core/rcu 16/26] rcu: Mark rcu_nmi_enter() call to rcu_cleanup_after_idle() noinstr paulmck
2020-06-23 17:04   ` Peter Zijlstra
2020-06-23 17:50     ` Paul E. McKenney
2020-06-23  0:21 ` [PATCH tip/core/rcu 17/26] lockdep: Complain only once about RCU in extended quiescent state paulmck
2020-06-23  0:21 ` [PATCH tip/core/rcu 18/26] rcu: Replace 1 with true paulmck
2020-06-23  0:21 ` [PATCH tip/core/rcu 19/26] rcu: Stop shrinker loop paulmck
2020-06-23  0:21 ` [PATCH tip/core/rcu 20/26] rcu: gp_max is protected by root rcu_node's lock paulmck
2020-06-23  0:21 ` [PATCH tip/core/rcu 21/26] rcu: grplo/grphi just records CPU number paulmck
2020-06-23  0:21 ` [PATCH tip/core/rcu 22/26] rcu: grpnum just records group number paulmck
2020-06-23  0:21 ` [PATCH tip/core/rcu 23/26] kernel/rcu/tree.c: Fix kernel-doc warnings paulmck
2020-06-23  0:21 ` [PATCH tip/core/rcu 24/26] rcu: fix some " paulmck
2020-06-23  0:21 ` [PATCH tip/core/rcu 25/26] rcu: Remove KCSAN stubs paulmck
2020-06-23  0:21 ` [PATCH tip/core/rcu 26/26] rcu: Remove KCSAN stubs from update.c paulmck

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