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From: Thomas Gleixner <tglx@linutronix.de>
To: LKML <linux-kernel@vger.kernel.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>,
	Andrew Morton <akpm@linux-foundation.org>,
	Ingo Molnar <mingo@kernel.org>,
	Peter Zijlstra <peterz@infradead.org>,
	Peter Anvin <hpa@zytor.com>, Oleg Nesterov <oleg@redhat.com>,
	linux-arch@vger.kernel.org, Tejun Heo <tj@kernel.org>,
	Steven Rostedt <rostedt@goodmis.org>,
	Rusty Russell <rusty@rustcorp.com.au>,
	Paul McKenney <paulmck@linux.vnet.ibm.com>,
	Rafael Wysocki <rafael.j.wysocki@intel.com>,
	Arjan van de Ven <arjan@linux.intel.com>,
	Rik van Riel <riel@redhat.com>,
	"Srivatsa S. Bhat" <srivatsa@mit.edu>,
	Sebastian Siewior <bigeasy@linutronix.de>,
	Paul Turner <pjt@google.com>
Subject: [patch 05/20] cpu/hotplug: Add tracepoints
Date: Fri, 26 Feb 2016 18:43:27 -0000
Message-ID: <20160226182340.593563875@linutronix.de> (raw)
In-Reply-To: <20160226164321.657646833@linutronix.de>

[-- Attachment #0: hotplug--Add-tracepoints.patch --]
[-- Type: text/plain, Size: 1779 bytes --]

We want to trace the hotplug machinery. Add tracepoints to track the
invocation of callbacks and their result.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
---
 include/trace/events/cpuhp.h |   66 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 66 insertions(+)

Index: b/include/trace/events/cpuhp.h
===================================================================
--- /dev/null
+++ b/include/trace/events/cpuhp.h
@@ -0,0 +1,66 @@
+#undef TRACE_SYSTEM
+#define TRACE_SYSTEM cpuhp
+
+#if !defined(_TRACE_CPUHP_H) || defined(TRACE_HEADER_MULTI_READ)
+#define _TRACE_CPUHP_H
+
+#include <linux/tracepoint.h>
+
+TRACE_EVENT(cpuhp_enter,
+
+	TP_PROTO(unsigned int cpu,
+		 int target,
+		 int idx,
+		 int (*fun)(unsigned int)),
+
+	TP_ARGS(cpu, target, idx, fun),
+
+	TP_STRUCT__entry(
+		__field( unsigned int,	cpu		)
+		__field( int,		target		)
+		__field( int,		idx		)
+		__field( void *,	fun		)
+	),
+
+	TP_fast_assign(
+		__entry->cpu	= cpu;
+		__entry->target	= target;
+		__entry->idx	= idx;
+		__entry->fun	= fun;
+	),
+
+	TP_printk("cpu: %04u target: %3d step: %3d (%pf)",
+		  __entry->cpu, __entry->target, __entry->idx, __entry->fun)
+);
+
+TRACE_EVENT(cpuhp_exit,
+
+	TP_PROTO(unsigned int cpu,
+		 int state,
+		 int idx,
+		 int ret),
+
+	TP_ARGS(cpu, state, idx, ret),
+
+	TP_STRUCT__entry(
+		__field( unsigned int,	cpu		)
+		__field( int,		state		)
+		__field( int,		idx		)
+		__field( int,		ret		)
+	),
+
+	TP_fast_assign(
+		__entry->cpu	= cpu;
+		__entry->state	= state;
+		__entry->idx	= idx;
+		__entry->ret	= ret;
+	),
+
+	TP_printk(" cpu: %04u  state: %3d step: %3d ret: %d",
+		  __entry->cpu, __entry->state, __entry->idx,  __entry->ret)
+);
+
+#endif
+
+/* This part must be outside protection */
+#include <trace/define_trace.h>

  parent reply index

Thread overview: 69+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-02-26 18:43 [patch 00/20] cpu/hotplug: Core infrastructure for cpu hotplug rework Thomas Gleixner
2016-02-26 18:43 ` [patch 01/20] idle: Move x86ism out of generic code Thomas Gleixner
2016-02-27 20:29   ` Brian Gerst
2016-02-29 19:35     ` Thomas Gleixner
2016-02-29 19:48       ` Will Deacon
2016-02-29 20:06         ` Thomas Gleixner
2016-02-26 18:43 ` [patch 02/20] cpu/hotplug: Restructure FROZEN state handling Thomas Gleixner
2016-03-01 19:51   ` [tip:smp/hotplug] " tip-bot for Thomas Gleixner
2016-03-02 22:35     ` Srivatsa S. Bhat
2016-03-02 23:43     ` Srivatsa S. Bhat
2016-02-26 18:43 ` [patch 03/20] cpu/hotplug: Restructure cpu_up code Thomas Gleixner
2016-03-01 19:52   ` [tip:smp/hotplug] " tip-bot for Thomas Gleixner
2016-03-02 22:36     ` Srivatsa S. Bhat
2016-02-26 18:43 ` [patch 04/20] cpu/hotplug: Split out cpu down functions Thomas Gleixner
2016-03-01 19:52   ` [tip:smp/hotplug] " tip-bot for Thomas Gleixner
2016-03-02 22:37     ` Srivatsa S. Bhat
2016-02-26 18:43 ` Thomas Gleixner [this message]
2016-03-01 19:52   ` [tip:smp/hotplug] cpu/hotplug: Add tracepoints tip-bot for Thomas Gleixner
2016-02-26 18:43 ` [patch 06/20] cpu/hotplug: Convert to a state machine for the control processor Thomas Gleixner
2016-03-01 19:53   ` [tip:smp/hotplug] " tip-bot for Thomas Gleixner
2016-03-02 11:23     ` Peter Zijlstra
2016-02-26 18:43 ` [patch 07/20] cpu/hotplug: Convert the hotplugged cpu work to a state machine Thomas Gleixner
2016-03-01 19:53   ` [tip:smp/hotplug] " tip-bot for Thomas Gleixner
2016-02-26 18:43 ` [patch 08/20] cpu/hotplug: Hand in target state to _cpu_up/down Thomas Gleixner
2016-03-01 19:54   ` [tip:smp/hotplug] " tip-bot for Thomas Gleixner
2016-02-26 18:43 ` [patch 09/20] cpu/hotplug: Add sysfs state interface Thomas Gleixner
2016-03-01 19:54   ` [tip:smp/hotplug] " tip-bot for Thomas Gleixner
2016-03-02 12:40     ` Peter Zijlstra
2016-02-26 18:43 ` [patch 10/20] cpu/hotplug: Make target state writeable Thomas Gleixner
2016-02-26 23:46   ` Rafael J. Wysocki
2016-02-27  7:39     ` Thomas Gleixner
2016-02-27 14:43       ` Rafael J. Wysocki
2016-02-28 14:49         ` Thomas Gleixner
2016-02-29 15:49           ` Thomas Gleixner
2016-03-01  1:53             ` Rafael J. Wysocki
2016-03-01 19:55   ` [tip:smp/hotplug] " tip-bot for Thomas Gleixner
2016-03-02 12:41     ` Peter Zijlstra
2016-03-02 19:57       ` Thomas Gleixner
2016-02-26 18:43 ` [patch 11/20] cpu/hotplug: Implement setup/removal interface Thomas Gleixner
2016-03-01 19:55   ` [tip:smp/hotplug] " tip-bot for Thomas Gleixner
2016-02-26 18:43 ` [patch 12/20] cpu/hotplug: Move scheduler cpu_online notifier to hotplug core Thomas Gleixner
2016-03-01 19:55   ` [tip:smp/hotplug] " tip-bot for Thomas Gleixner
2016-02-26 18:43 ` [patch 13/20] cpu/hotplug: Unpark smpboot threads from the state machine Thomas Gleixner
2016-03-01 19:56   ` [tip:smp/hotplug] " tip-bot for Thomas Gleixner
2016-02-26 18:43 ` [patch 14/20] cpu/hotplug: Split out the state walk into functions Thomas Gleixner
2016-03-01 19:56   ` [tip:smp/hotplug] " tip-bot for Thomas Gleixner
2016-02-26 18:43 ` [patch 15/20] cpu/hotplug: Create hotplug threads Thomas Gleixner
2016-03-01 19:57   ` [tip:smp/hotplug] " tip-bot for Thomas Gleixner
2016-02-26 18:43 ` [patch 16/20] cpu/hotplug: Move online calls to hotplugged cpu Thomas Gleixner
2016-03-01 19:57   ` [tip:smp/hotplug] " tip-bot for Thomas Gleixner
2016-02-26 18:43 ` [patch 17/20] arch/hotplug: Call into idle with a proper state Thomas Gleixner
2016-03-01 19:57   ` [tip:smp/hotplug] " tip-bot for Thomas Gleixner
2016-02-26 18:43 ` [patch 18/20] cpu/hotplug: Let upcoming cpu bring itself fully up Thomas Gleixner
2016-03-01 19:58   ` [tip:smp/hotplug] " tip-bot for Thomas Gleixner
2016-03-02 17:28   ` [patch 18/20] " Richard Cochran
2016-02-26 18:43 ` [patch 19/20] cpu/hotplug: Make wait for dead cpu completion based Thomas Gleixner
2016-03-01 19:58   ` [tip:smp/hotplug] " tip-bot for Thomas Gleixner
2016-02-26 18:43 ` [patch 20/20] rcu: Make CPU_DYING_IDLE an explicit call Thomas Gleixner
2016-02-27  2:14   ` Paul E. McKenney
2016-02-27  2:23     ` Paul E. McKenney
2016-02-27  7:47       ` Thomas Gleixner
2016-02-27 11:05         ` Paul E. McKenney
2016-02-27 11:30           ` Thomas Gleixner
2016-02-27 16:33             ` Paul E. McKenney
2016-03-01 19:58   ` [tip:smp/hotplug] " tip-bot for Thomas Gleixner
2016-03-02 20:11     ` Paul E. McKenney
2016-03-03  7:31       ` Thomas Gleixner
2016-03-03 10:03       ` [tip:smp/hotplug] cpu/hotplug: Plug death reporting race tip-bot for Thomas Gleixner
2016-03-03 14:11         ` Paul E. McKenney

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