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From: Thomas Gleixner <tglx@linutronix.de>
To: LKML <linux-kernel@vger.kernel.org>
Cc: Ingo Molnar <mingo@kernel.org>,
	Peter Zijlstra <peterz@infradead.org>,
	"Paul E. McKenney" <paulmck@linux.vnet.ibm.com>,
	Eric Dumazet <edumazet@google.com>,
	Frederic Weisbecker <fweisbec@gmail.com>,
	Chris Mason <clm@fb.com>, Arjan van de Ven <arjan@infradead.org>,
	rt@linutronix.de, Anna-Maria Gleixner <anna-maria@linutronix.de>
Subject: [patch 15/20] timer: Move __run_timers() function
Date: Mon, 13 Jun 2016 08:41:01 -0000	[thread overview]
Message-ID: <20160613075929.442261795@linutronix.de> (raw)
In-Reply-To: 20160613070440.950649741@linutronix.de

[-- Attachment #1: timer-move-functions-around.patch --]
[-- Type: text/plain, Size: 1926 bytes --]

From: Anna-Maria Gleixner <anna-maria@linutronix.de>

Move __run_timers() below __next_timer_interrupt() and next_pending_bucket()
in preparation for __run_timers() NOHZ optimization.

No functional change.

Signed-off-by: Anna-Maria Gleixner <anna-maria@linutronix.de>
Cc: rt@linutronix.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
---
 kernel/time/timer.c |   46 +++++++++++++++++++++++-----------------------
 1 file changed, 23 insertions(+), 23 deletions(-)

--- a/kernel/time/timer.c
+++ b/kernel/time/timer.c
@@ -1280,29 +1280,6 @@ static int collect_expired_timers(struct
 	return levels;
 }
 
-/**
- * __run_timers - run all expired timers (if any) on this CPU.
- * @base: the timer vector to be processed.
- */
-static inline void __run_timers(struct timer_base *base)
-{
-	struct hlist_head heads[LVL_DEPTH];
-	int levels;
-
-	spin_lock_irq(&base->lock);
-
-	while (time_after_eq(jiffies, base->clk)) {
-
-		levels = collect_expired_timers(base, heads);
-		base->clk++;
-
-		while (levels--)
-			expire_timers(base, heads + levels);
-	}
-	base->running_timer = NULL;
-	spin_unlock_irq(&base->lock);
-}
-
 #ifdef CONFIG_NO_HZ_COMMON
 /*
  * Find the next pending bucket of a level. Search from @offset + @clk upwards
@@ -1478,6 +1455,29 @@ void update_process_times(int user_tick)
 	run_posix_cpu_timers(p);
 }
 
+/**
+ * __run_timers - run all expired timers (if any) on this CPU.
+ * @base: the timer vector to be processed.
+ */
+static inline void __run_timers(struct timer_base *base)
+{
+	struct hlist_head heads[LVL_DEPTH];
+	int levels;
+
+	spin_lock_irq(&base->lock);
+
+	while (time_after_eq(jiffies, base->clk)) {
+
+		levels = collect_expired_timers(base, heads);
+		base->clk++;
+
+		while (levels--)
+			expire_timers(base, heads + levels);
+	}
+	base->running_timer = NULL;
+	spin_unlock_irq(&base->lock);
+}
+
 /*
  * This function runs timers and the timer-tq in bottom half context.
  */

  parent reply	other threads:[~2016-06-13  8:43 UTC|newest]

Thread overview: 55+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-06-13  8:40 [patch 00/20] timer: Refactor the timer wheel Thomas Gleixner
2016-06-13  8:40 ` [patch 01/20] timer: Make pinned a timer property Thomas Gleixner
2016-06-13  8:40 ` [patch 02/20] x86/apic/uv: Initialize timer as pinned Thomas Gleixner
2016-06-13  8:40 ` [patch 03/20] x86/mce: " Thomas Gleixner
2016-06-13  8:40 ` [patch 04/20] cpufreq/powernv: " Thomas Gleixner
2016-06-13 13:18   ` Arjan van de Ven
2016-06-13  8:40 ` [patch 05/20] driver/net/ethernet/tile: " Thomas Gleixner
2016-06-13  8:40 ` [patch 06/20] drivers/tty/metag_da: " Thomas Gleixner
2016-06-13 13:13   ` Arjan van de Ven
2016-06-13  8:40 ` [patch 07/20] drivers/tty/mips_ejtag: " Thomas Gleixner
2016-06-13  8:40 ` [patch 08/20] net/ipv4/inet: Initialize timers " Thomas Gleixner
2016-06-13  8:40 ` [patch 09/20] timer: Remove mod_timer_pinned Thomas Gleixner
2016-06-13  8:40 ` [patch 10/20] timer: Add a cascading tracepoint Thomas Gleixner
2016-06-13  8:40 ` [patch 11/20] hlist: Add hlist_is_last_node() helper Thomas Gleixner
2016-06-13 10:27   ` Paolo Bonzini
2016-06-13  8:40 ` [patch 12/20] timer: Give a few structs and members proper names Thomas Gleixner
2016-06-13  8:41 ` [patch 13/20] timer: Switch to a non cascading wheel Thomas Gleixner
2016-06-13 11:40   ` Peter Zijlstra
2016-06-13 12:30     ` Thomas Gleixner
2016-06-13 12:46       ` Eric Dumazet
2016-06-13 14:30         ` Thomas Gleixner
2016-06-14 10:11       ` Ingo Molnar
2016-06-14 16:28         ` Thomas Gleixner
2016-06-14 17:14           ` Arjan van de Ven
2016-06-14 18:05             ` Thomas Gleixner
2016-06-14 20:34               ` Peter Zijlstra
2016-06-14 20:42               ` Peter Zijlstra
2016-06-14 21:17                 ` Eric Dumazet
2016-06-15 14:53                   ` Thomas Gleixner
2016-06-15 14:55                     ` Arjan van de Ven
2016-06-15 16:43                       ` Thomas Gleixner
2016-06-16 15:43                         ` Thomas Gleixner
2016-06-16 16:02                           ` Paul E. McKenney
2016-06-16 18:14                             ` Peter Zijlstra
2016-06-17  0:40                               ` Paul E. McKenney
2016-06-17  4:04                                 ` Paul E. McKenney
2016-06-16 16:04                           ` Arjan van de Ven
2016-06-16 16:09                             ` Thomas Gleixner
2016-06-15 15:05                     ` Eric Dumazet
2016-06-13 14:36   ` Richard Cochran
2016-06-13 14:39     ` Thomas Gleixner
2016-06-13  8:41 ` Thomas Gleixner [this message]
2016-06-13  8:41 ` [patch 14/20] timer: Remove slack leftovers Thomas Gleixner
2016-06-13  8:41 ` [patch 16/20] timer: Optimize collect timers for NOHZ Thomas Gleixner
2016-06-13  8:41 ` [patch 17/20] tick/sched: Remove pointless empty function Thomas Gleixner
2016-06-13  8:41 ` [patch 18/20] timer: Forward wheel clock whenever possible Thomas Gleixner
2016-06-13 15:14   ` Richard Cochran
2016-06-13 15:18     ` Thomas Gleixner
2016-06-13  8:41 ` [patch 19/20] timer: Split out index calculation Thomas Gleixner
2016-06-13  8:41 ` [patch 20/20] timer: Optimization for same expiry time in mod_timer() Thomas Gleixner
2016-06-13 14:10 ` [patch 00/20] timer: Refactor the timer wheel Eric Dumazet
2016-06-13 16:15 ` Paul E. McKenney
2016-06-15 15:15   ` Paul E. McKenney
2016-06-15 17:02     ` Thomas Gleixner
2016-06-15 20:26       ` Paul E. McKenney

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