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Commit 5ba9ac8e authored by Thomas Gleixner's avatar Thomas Gleixner
Browse files

cpu/hotplug: Add tracepoints 



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

Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
Cc: linux-arch@vger.kernel.org
Cc: Rik van Riel <riel@redhat.com>
Cc: Rafael Wysocki <rafael.j.wysocki@intel.com>
Cc: "Srivatsa S. Bhat" <srivatsa@mit.edu>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Arjan van de Ven <arjan@linux.intel.com>
Cc: Sebastian Siewior <bigeasy@linutronix.de>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Tejun Heo <tj@kernel.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Paul McKenney <paulmck@linux.vnet.ibm.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Paul Turner <pjt@google.com>
Link: http://lkml.kernel.org/r/20160226182340.593563875@linutronix.de


Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
parent 98458172

include/trace/events/cpuhp.h

0 → 100644
+66 −0
Original line number Diff line number Diff line 
#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>