tools lib traceevent: Add support to show migrate disable counter

The RT kernel added a migrate disable counter in all events. Add
support to show this in the latency format.

Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Link: http://lkml.kernel.org/n/tip-l6ulxyda952g7kua4pfsh73k@git.kernel.org
Signed-off-by: Namhyung Kim <namhyung@kernel.org>

diff --git a/tools/lib/traceevent/event-parse.c b/tools/lib/traceevent/event-parse.c
index 0644c2a..872dd35 100644 (file)
--- a/tools/lib/traceevent/event-parse.c
+++ b/tools/lib/traceevent/event-parse.c
@@ -2884,7 +2884,7 @@ static int get_common_info(struct pevent *pevent,
        event = pevent->events[0];
        field = pevent_find_common_field(event, type);
        if (!field)
-               die("field '%s' not found", type);
+               return -1;
 
        *offset = field->offset;
        *size = field->size;
@@ -2935,15 +2935,16 @@ static int parse_common_flags(struct pevent *pevent, void *data)
 
 static int parse_common_lock_depth(struct pevent *pevent, void *data)
 {
-       int ret;
-
-       ret = __parse_common(pevent, data,
-                            &pevent->ld_size, &pevent->ld_offset,
-                            "common_lock_depth");
-       if (ret < 0)
-               return -1;
+       return __parse_common(pevent, data,
+                             &pevent->ld_size, &pevent->ld_offset,
+                             "common_lock_depth");
+}
 
-       return ret;
+static int parse_common_migrate_disable(struct pevent *pevent, void *data)
+{
+       return __parse_common(pevent, data,
+                             &pevent->ld_size, &pevent->ld_offset,
+                             "common_migrate_disable");
 }
 
 static int events_id_cmp(const void *a, const void *b);
@@ -3988,10 +3989,13 @@ void pevent_data_lat_fmt(struct pevent *pevent,
                         struct trace_seq *s, struct pevent_record *record)
 {
        static int check_lock_depth = 1;
+       static int check_migrate_disable = 1;
        static int lock_depth_exists;
+       static int migrate_disable_exists;
        unsigned int lat_flags;
        unsigned int pc;
        int lock_depth;
+       int migrate_disable;
        int hardirq;
        int softirq;
        void *data = record->data;
@@ -3999,18 +4003,26 @@ void pevent_data_lat_fmt(struct pevent *pevent,
        lat_flags = parse_common_flags(pevent, data);
        pc = parse_common_pc(pevent, data);
        /* lock_depth may not always exist */
-       if (check_lock_depth) {
-               struct format_field *field;
-               struct event_format *event;
-
-               check_lock_depth = 0;
-               event = pevent->events[0];
-               field = pevent_find_common_field(event, "common_lock_depth");
-               if (field)
-                       lock_depth_exists = 1;
-       }
        if (lock_depth_exists)
                lock_depth = parse_common_lock_depth(pevent, data);
+       else if (check_lock_depth) {
+               lock_depth = parse_common_lock_depth(pevent, data);
+               if (lock_depth < 0)
+                       check_lock_depth = 0;
+               else
+                       lock_depth_exists = 1;
+       }
+
+       /* migrate_disable may not always exist */
+       if (migrate_disable_exists)
+               migrate_disable = parse_common_migrate_disable(pevent, data);
+       else if (check_migrate_disable) {
+               migrate_disable = parse_common_migrate_disable(pevent, data);
+               if (migrate_disable < 0)
+                       check_migrate_disable = 0;
+               else
+                       migrate_disable_exists = 1;
+       }
 
        hardirq = lat_flags & TRACE_FLAG_HARDIRQ;
        softirq = lat_flags & TRACE_FLAG_SOFTIRQ;
@@ -4029,6 +4041,13 @@ void pevent_data_lat_fmt(struct pevent *pevent,
        else
                trace_seq_putc(s, '.');
 
+       if (migrate_disable_exists) {
+               if (migrate_disable < 0)
+                       trace_seq_putc(s, '.');
+               else
+                       trace_seq_printf(s, "%d", migrate_disable);
+       }
+
        if (lock_depth_exists) {
                if (lock_depth < 0)
                        trace_seq_putc(s, '.');