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 (file)
--- a/tools/perf/util/event.c
+++ b/tools/perf/util/event.c
@@ -37,6 +37,7 @@ static const char *perf_event__names[] = {
        [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 (file)
--- a/tools/perf/util/event.h
+++ b/tools/perf/util/event.h
@@ -226,6 +226,7 @@ enum perf_user_event_type { /* above any possible kernel type */
        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 @@ struct context_switch_event {
        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 @@ union perf_event {
        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 (file)
--- a/tools/perf/util/session.c
+++ b/tools/perf/util/session.c
@@ -296,6 +296,16 @@ int process_event_auxtrace_error_stub(struct perf_tool *tool __maybe_unused,
        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 @@ void perf_tool__fill_defaults(struct perf_tool *tool)
                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 @@ static void perf_event__auxtrace_error_swap(union perf_event *event,
        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 @@ static perf_event__swap_op perf_event__swap_ops[] = {
        [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 @@ static s64 perf_session__process_user_event(struct perf_session *session,
        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 (file)
--- a/tools/perf/util/tool.h
+++ b/tools/perf/util/tool.h
@@ -55,7 +55,8 @@ struct perf_tool {
        event_op2       build_id,
                        id_index,
                        auxtrace_info,
-                       auxtrace_error;
+                       auxtrace_error,
+                       thread_map;
        event_op3       auxtrace;
        bool            ordered_events;
        bool            ordering_requires_timestamps;