[PATCH 04/45] perf tools: Add cpu_map event

[Jiri Olsa]

Adding cpu_map event to pass/store cpu maps
as data in pipe/perf.data.

Link: http://lkml.kernel.org/n/tip-tomgwwohnuxvvalwu4znaa2o@xxxxxxxxxxxxxx
Signed-off-by: Jiri Olsa <jolsa@xxxxxxxxxx>
---
 tools/perf/util/event.c   |  1 +
 tools/perf/util/event.h   |  8 ++++++++
 tools/perf/util/session.c | 25 +++++++++++++++++++++++++
 tools/perf/util/tool.h    |  3 ++-
 4 files changed, 36 insertions(+), 1 deletion(-)

diff --git a/tools/perf/util/event.c b/tools/perf/util/event.c
index 57df245b6fa6..091c5de2a523 100644
--- a/tools/perf/util/event.c
+++ b/tools/perf/util/event.c
@@ -38,6 +38,7 @@ static const char *perf_event__names[] = {
 	[PERF_RECORD_AUXTRACE]			= "AUXTRACE",
 	[PERF_RECORD_AUXTRACE_ERROR]		= "AUXTRACE_ERROR",
 	[PERF_RECORD_THREAD_MAP]		= "THREAD_MAP",
+	[PERF_RECORD_CPU_MAP]			= "CPU_MAP",
 };
 
 const char *perf_event__name(unsigned int id)
diff --git a/tools/perf/util/event.h b/tools/perf/util/event.h
index 3ef69fef4497..46162b9c6720 100644
--- a/tools/perf/util/event.h
+++ b/tools/perf/util/event.h
@@ -227,6 +227,7 @@ enum perf_user_event_type { /* above any possible kernel type */
 	PERF_RECORD_AUXTRACE			= 71,
 	PERF_RECORD_AUXTRACE_ERROR		= 72,
 	PERF_RECORD_THREAD_MAP			= 73,
+	PERF_RECORD_CPU_MAP			= 74,
 	PERF_RECORD_HEADER_MAX
 };
 
@@ -368,6 +369,12 @@ struct thread_map_event {
 	struct thread_map_data_event	data[];
 };
 
+struct cpu_map_event {
+	struct perf_event_header	header;
+	u64				nr;
+	u64				cpu[];
+};
+
 union perf_event {
 	struct perf_event_header	header;
 	struct mmap_event		mmap;
@@ -391,6 +398,7 @@ union perf_event {
 	struct itrace_start_event	itrace_start;
 	struct context_switch_event	context_switch;
 	struct thread_map_event		thread_map;
+	struct cpu_map_event		cpu_map;
 };
 
 void perf_event__print_totals(void);
diff --git a/tools/perf/util/session.c b/tools/perf/util/session.c
index bd64c7f2bead..e6d1f1439ad4 100644
--- a/tools/perf/util/session.c
+++ b/tools/perf/util/session.c
@@ -306,6 +306,15 @@ int process_event_thread_map_stub(struct perf_tool *tool __maybe_unused,
 	return 0;
 }
 
+static
+int process_event_cpu_map_stub(struct perf_tool *tool __maybe_unused,
+			       union perf_event *event __maybe_unused,
+			       struct perf_session *session __maybe_unused)
+{
+	dump_printf(": unhandled!\n");
+	return 0;
+}
+
 void perf_tool__fill_defaults(struct perf_tool *tool)
 {
 	if (tool->sample == NULL)
@@ -358,6 +367,8 @@ void perf_tool__fill_defaults(struct perf_tool *tool)
 		tool->auxtrace_error = process_event_auxtrace_error_stub;
 	if (tool->thread_map == NULL)
 		tool->thread_map = process_event_thread_map_stub;
+	if (tool->cpu_map == NULL)
+		tool->cpu_map = process_event_cpu_map_stub;
 }
 
 static void swap_sample_id_all(union perf_event *event, void *data)
@@ -639,6 +650,17 @@ static void perf_event__thread_map_swap(union perf_event *event,
 		event->thread_map.data[i].pid = bswap_64(event->thread_map.data[i].pid);
 }
 
+static void perf_event__cpu_map_swap(union perf_event *event,
+				     bool sample_id_all __maybe_unused)
+{
+	unsigned i;
+
+	event->cpu_map.nr = bswap_64(event->cpu_map.nr);
+
+	for (i = 0; i < event->cpu_map.nr; i++)
+		event->cpu_map.cpu[i] = bswap_64(event->cpu_map.cpu[i]);
+}
+
 typedef void (*perf_event__swap_op)(union perf_event *event,
 				    bool sample_id_all);
 
@@ -667,6 +689,7 @@ static perf_event__swap_op perf_event__swap_ops[] = {
 	[PERF_RECORD_AUXTRACE]		  = perf_event__auxtrace_swap,
 	[PERF_RECORD_AUXTRACE_ERROR]	  = perf_event__auxtrace_error_swap,
 	[PERF_RECORD_THREAD_MAP]	  = perf_event__thread_map_swap,
+	[PERF_RECORD_CPU_MAP]		  = perf_event__cpu_map_swap,
 	[PERF_RECORD_HEADER_MAX]	  = NULL,
 };
 
@@ -1205,6 +1228,8 @@ static s64 perf_session__process_user_event(struct perf_session *session,
 		return tool->auxtrace_error(tool, event, session);
 	case PERF_RECORD_THREAD_MAP:
 		return tool->thread_map(tool, event, session);
+	case PERF_RECORD_CPU_MAP:
+		return tool->cpu_map(tool, event, session);
 	default:
 		return -EINVAL;
 	}
diff --git a/tools/perf/util/tool.h b/tools/perf/util/tool.h
index 1af4774960c3..9e5925c78519 100644
--- a/tools/perf/util/tool.h
+++ b/tools/perf/util/tool.h
@@ -56,7 +56,8 @@ struct perf_tool {
 			id_index,
 			auxtrace_info,
 			auxtrace_error,
-			thread_map;
+			thread_map,
+			cpu_map;
 	event_op3	auxtrace;
 	bool		ordered_events;
 	bool		ordering_requires_timestamps;
-- 
2.4.3

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