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Date:	Fri, 25 Jul 2014 12:36:50 -0300
From:	Arnaldo Carvalho de Melo <>
To:	Ingo Molnar <>
	Adrian Hunter <>,
	David Ahern <>,
	Frederic Weisbecker <>,
	Jiri Olsa <>,
	Namhyung Kim <>,
	Paul Mackerras <>,
	Peter Zijlstra <>,
	Stephane Eranian <>,
	Arnaldo Carvalho de Melo <>
Subject: [PATCH 08/27] perf tools: Add cpu to struct thread

From: Adrian Hunter <>

Tools may wish to track on which cpu a thread is running.  Add 'cpu' to
struct thread for that purpose.

This will be used to determine the cpu when decoding a per-thread
Instruction Trace.

E.g: Intel PT decoding uses sched_switch events to determine which task
is running on which cpu.  The Intel PT data comes straight from the
hardware which doesn't know about linux threads.

Signed-off-by: Adrian Hunter <>
Cc: David Ahern <>
Cc: Frederic Weisbecker <>
Cc: Jiri Olsa <>
Cc: Namhyung Kim <>
Cc: Paul Mackerras <>
Cc: Peter Zijlstra <>
Cc: Stephane Eranian <>
Signed-off-by: Arnaldo Carvalho de Melo <>
 tools/perf/util/thread.c | 1 +
 tools/perf/util/thread.h | 1 +
 2 files changed, 2 insertions(+)

diff --git a/tools/perf/util/thread.c b/tools/perf/util/thread.c
index 9692c06a9e21..12c7a253a63c 100644
--- a/tools/perf/util/thread.c
+++ b/tools/perf/util/thread.c
@@ -34,6 +34,7 @@ struct thread *thread__new(pid_t pid, pid_t tid)
 		thread->pid_ = pid;
 		thread->tid = tid;
 		thread->ppid = -1;
+		thread->cpu = -1;
 		comm_str = malloc(32);
diff --git a/tools/perf/util/thread.h b/tools/perf/util/thread.h
index 3c0c2724f82c..716b7723cce2 100644
--- a/tools/perf/util/thread.h
+++ b/tools/perf/util/thread.h
@@ -17,6 +17,7 @@ struct thread {
 	pid_t			pid_; /* Not all tools update this */
 	pid_t			tid;
 	pid_t			ppid;
+	int			cpu;
 	char			shortname[3];
 	bool			comm_set;
 	bool			dead; /* if set thread has exited */

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