[PATCH v0 14/71] perf tools: Add cpu to struct thread

[Alexander Shishkin]

From: Adrian Hunter <adrian.hunter@xxxxxxxxx>

Tools may wish to track on which cpu a thread
is running.  Add 'cpu' to struct thread for
that purpose.  Also add machine functions to
get / set the cpu for a tid.

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

Signed-off-by: Adrian Hunter <adrian.hunter@xxxxxxxxx>
---
 tools/perf/util/machine.c | 26 ++++++++++++++++++++++++++
 tools/perf/util/machine.h |  3 +++
 tools/perf/util/thread.c  |  1 +
 tools/perf/util/thread.h  |  1 +
 4 files changed, 31 insertions(+)

diff --git a/tools/perf/util/machine.c b/tools/perf/util/machine.c
index 55f3608..52fbfb6 100644
--- a/tools/perf/util/machine.c
+++ b/tools/perf/util/machine.c
@@ -1412,3 +1412,29 @@ pid_t machine__get_thread_pid(struct machine *machine, pid_t tid)
 
 	return thread->pid_;
 }
+
+int machine__get_thread_cpu(struct machine *machine, pid_t tid, pid_t *pid)
+{
+	struct thread *thread = machine__find_thread(machine, tid);
+
+	if (!thread)
+		return -1;
+
+	if (pid)
+		*pid = thread->pid_;
+
+	return thread->cpu;
+}
+
+int machine__set_thread_cpu(struct machine *machine, pid_t pid, pid_t tid,
+			    int cpu)
+{
+	struct thread *thread = machine__findnew_thread(machine, pid, tid);
+
+	if (!thread)
+		return -ENOMEM;
+
+	thread->cpu = cpu;
+
+	return 0;
+}
diff --git a/tools/perf/util/machine.h b/tools/perf/util/machine.h
index b800a5a..27486af 100644
--- a/tools/perf/util/machine.h
+++ b/tools/perf/util/machine.h
@@ -191,5 +191,8 @@ int machine__synthesize_threads(struct machine *machine, struct target *target,
 }
 
 pid_t machine__get_thread_pid(struct machine *machine, pid_t tid);
+int machine__get_thread_cpu(struct machine *machine, pid_t tid, pid_t *pid);
+int machine__set_thread_cpu(struct machine *machine, pid_t pid, pid_t tid,
+			    int cpu);
 
 #endif /* __PERF_MACHINE_H */
diff --git a/tools/perf/util/thread.c b/tools/perf/util/thread.c
index 49eaf1d..a120af3 100644
--- a/tools/perf/util/thread.c
+++ b/tools/perf/util/thread.c
@@ -19,6 +19,7 @@ struct thread *thread__new(pid_t pid, pid_t tid)
 		thread->pid_ = pid;
 		thread->tid = tid;
 		thread->ppid = -1;
+		thread->cpu = -1;
 		INIT_LIST_HEAD(&thread->comm_list);
 
 		comm_str = malloc(32);
diff --git a/tools/perf/util/thread.h b/tools/perf/util/thread.h
index 5b856bf..7914050 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 */
-- 
1.8.5.1

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