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
Subject: [patch 10/20] timer: Add a cascading tracepoint
Date: Mon, 13 Jun 2016 08:40:57 -0000 [thread overview]
Message-ID: <20160613075929.016861705@linutronix.de> (raw)
In-Reply-To: 20160613070440.950649741@linutronix.de
[-- Attachment #1: timers--Add-a-cascading-tracepoint.patch --]
[-- Type: text/plain, Size: 1115 bytes --]
For analysis of the timer wheel its necessary to trace the cascading. Add a
tracepoint.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: rt@linutronix.de
---
include/trace/events/timer.h | 11 +++++++++++
kernel/time/timer.c | 1 +
2 files changed, 12 insertions(+)
--- a/include/trace/events/timer.h
+++ b/include/trace/events/timer.h
@@ -126,6 +126,17 @@ DEFINE_EVENT(timer_class, timer_cancel,
);
/**
+ * timer_cascade - called when the timer is cascaded
+ * @timer: pointer to struct timer_list
+ */
+DEFINE_EVENT(timer_class, timer_cascade,
+
+ TP_PROTO(struct timer_list *timer),
+
+ TP_ARGS(timer)
+);
+
+/**
* hrtimer_init - called when the hrtimer is initialized
* @hrtimer: pointer to struct hrtimer
* @clockid: the hrtimers clock
--- a/kernel/time/timer.c
+++ b/kernel/time/timer.c
@@ -1099,6 +1099,7 @@ static int cascade(struct tvec_base *bas
* don't have to detach them individually.
*/
hlist_for_each_entry_safe(timer, tmp, &tv_list, entry) {
+ trace_timer_cascade(timer);
/* No accounting, while moving them */
__internal_add_timer(base, timer);
}
next prev parent reply other threads:[~2016-06-13 8:47 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 ` Thomas Gleixner [this message]
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 ` [patch 15/20] timer: Move __run_timers() function Thomas Gleixner
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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