perf-report: Add bare minimum PERF_EVENT_READ parsing

Provide the basic infrastructure to provide per task stats.

Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 24 insertions, 0 deletions

diff --git a/tools/perf/builtin-report.c b/tools/perf/builtin-report.c
index ec5361c67bf..681c2233f88 100644
--- a/tools/perf/builtin-report.c
+++ b/tools/perf/builtin-report.c
@@ -100,6 +100,13 @@ struct lost_event {
         u64 lost;
 };
 
+struct read_event {
+        struct perf_event_header header;
+        u32 pid,tid;
+        u64 value;
+        u64 format[3];
+};
+
 typedef union event_union {
         struct perf_event_header        header;
         struct ip_event                 ip;
@@ -108,6 +115,7 @@ typedef union event_union {
         struct fork_event               fork;
         struct period_event             period;
         struct lost_event               lost;
+        struct read_event               read;
 } event_t;
 
 static LIST_HEAD(dsos);
@@ -1350,6 +1358,19 @@ static void trace_event(event_t *event)
 }
 
 static int
+process_read_event(event_t *event, unsigned long offset, unsigned long head)
+{
+        dprintf("%p [%p]: PERF_EVENT_READ: %d %d %Lu\n",
+                        (void *)(offset + head),
+                        (void *)(long)(event->header.size),
+                        event->read.pid,
+                        event->read.tid,
+                        event->read.value);
+
+        return 0;
+}
+
+static int
 process_event(event_t *event, unsigned long offset, unsigned long head)
 {
         trace_event(event);
@@ -1373,6 +1394,9 @@ process_event(event_t *event, unsigned long offset, unsigned long head)
         case PERF_EVENT_LOST:
                 return process_lost_event(event, offset, head);
 
+        case PERF_EVENT_READ:
+                return process_read_event(event, offset, head);
+
         /*
          * We dont process them right now but they are fine:
          */