perf thread_map: Add thread_map user level event
Adding the thread_map event to pass/store thread maps as data in
the pipe/perf.data.
Storing the thread ID along with the standard comm[16] thread name string.
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Tested-by: Kan Liang <kan.liang@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1445784728-21732-4-git-send-email-jolsa@kernel.org
[ Renamed thread_map_data_event to thread_map_event_entry ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
diff --git a/tools/perf/util/event.c b/tools/perf/util/event.c
index 8b10621..771545a 100644
--- a/tools/perf/util/event.c
+++ b/tools/perf/util/event.c
@@ -37,6 +37,7 @@
[PERF_RECORD_AUXTRACE_INFO] = "AUXTRACE_INFO",
[PERF_RECORD_AUXTRACE] = "AUXTRACE",
[PERF_RECORD_AUXTRACE_ERROR] = "AUXTRACE_ERROR",
+ [PERF_RECORD_THREAD_MAP] = "THREAD_MAP",
};
const char *perf_event__name(unsigned int id)
diff --git a/tools/perf/util/event.h b/tools/perf/util/event.h
index a0dbcbd..66f303e 100644
--- a/tools/perf/util/event.h
+++ b/tools/perf/util/event.h
@@ -226,6 +226,7 @@
PERF_RECORD_AUXTRACE_INFO = 70,
PERF_RECORD_AUXTRACE = 71,
PERF_RECORD_AUXTRACE_ERROR = 72,
+ PERF_RECORD_THREAD_MAP = 73,
PERF_RECORD_HEADER_MAX
};
@@ -356,6 +357,17 @@
u32 next_prev_tid;
};
+struct thread_map_event_entry {
+ u64 pid;
+ char comm[16];
+};
+
+struct thread_map_event {
+ struct perf_event_header header;
+ u64 nr;
+ struct thread_map_event_entry entries[];
+};
+
union perf_event {
struct perf_event_header header;
struct mmap_event mmap;
@@ -378,6 +390,7 @@
struct aux_event aux;
struct itrace_start_event itrace_start;
struct context_switch_event context_switch;
+ struct thread_map_event thread_map;
};
void perf_event__print_totals(void);
diff --git a/tools/perf/util/session.c b/tools/perf/util/session.c
index 9774686..36b07b2 100644
--- a/tools/perf/util/session.c
+++ b/tools/perf/util/session.c
@@ -296,6 +296,16 @@
return 0;
}
+
+static
+int process_event_thread_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)
@@ -346,6 +356,8 @@
tool->auxtrace = process_event_auxtrace_stub;
if (tool->auxtrace_error == NULL)
tool->auxtrace_error = process_event_auxtrace_error_stub;
+ if (tool->thread_map == NULL)
+ tool->thread_map = process_event_thread_map_stub;
}
static void swap_sample_id_all(union perf_event *event, void *data)
@@ -616,6 +628,17 @@
event->auxtrace_error.ip = bswap_64(event->auxtrace_error.ip);
}
+static void perf_event__thread_map_swap(union perf_event *event,
+ bool sample_id_all __maybe_unused)
+{
+ unsigned i;
+
+ event->thread_map.nr = bswap_64(event->thread_map.nr);
+
+ for (i = 0; i < event->thread_map.nr; i++)
+ event->thread_map.entries[i].pid = bswap_64(event->thread_map.entries[i].pid);
+}
+
typedef void (*perf_event__swap_op)(union perf_event *event,
bool sample_id_all);
@@ -643,6 +666,7 @@
[PERF_RECORD_AUXTRACE_INFO] = perf_event__auxtrace_info_swap,
[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_HEADER_MAX] = NULL,
};
@@ -1179,6 +1203,8 @@
case PERF_RECORD_AUXTRACE_ERROR:
perf_session__auxtrace_error_inc(session, event);
return tool->auxtrace_error(tool, event, session);
+ case PERF_RECORD_THREAD_MAP:
+ return tool->thread_map(tool, event, session);
default:
return -EINVAL;
}
diff --git a/tools/perf/util/tool.h b/tools/perf/util/tool.h
index cab8cc2..1af4774 100644
--- a/tools/perf/util/tool.h
+++ b/tools/perf/util/tool.h
@@ -55,7 +55,8 @@
event_op2 build_id,
id_index,
auxtrace_info,
- auxtrace_error;
+ auxtrace_error,
+ thread_map;
event_op3 auxtrace;
bool ordered_events;
bool ordering_requires_timestamps;