perf ordered_events: Add ordered_events__flush_time interface

Add OE_FLUSH__TIME flush type, to be able to flush only certain amount
of the queue based on the provided timestamp. It will be used in the
following patches.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Dmitry Levin <ldv@altlinux.org>
Cc: Eugene Syromiatnikov <esyr@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Luis Cláudio Gonçalves <lclaudio@uudg.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Steven Rostedt (VMware) <rostedt@goodmis.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/20181205160509.1168-7-jolsa@kernel.org
[ Fix the build on older systems such as centos 5 and 6 where 'time' shadows a global declaration ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

2 files changed, 21 insertions, 4 deletions

diff --git a/tools/perf/util/ordered-events.c b/tools/perf/util/ordered-events.c
index c5412db05683..46965643020b 100644
--- a/tools/perf/util/ordered-events.c
+++ b/tools/perf/util/ordered-events.c
@@ -219,8 +219,7 @@ int ordered_events__queue(struct ordered_events *oe, union perf_event *event,
         return 0;
 }
 
-static int __ordered_events__flush(struct ordered_events *oe,
-                                   bool show_progress)
+static int do_flush(struct ordered_events *oe, bool show_progress)
 {
         struct list_head *head = &oe->events;
         struct ordered_event *tmp, *iter;
@@ -263,7 +262,8 @@ static int __ordered_events__flush(struct ordered_events *oe,
         return 0;
 }
 
-int ordered_events__flush(struct ordered_events *oe, enum oe_flush how)
+static int __ordered_events__flush(struct ordered_events *oe, enum oe_flush how,
+                                   u64 timestamp)
 {
         static const char * const str[] = {
                 "NONE",
@@ -302,6 +302,11 @@ int ordered_events__flush(struct ordered_events *oe, enum oe_flush how)
                 break;
         }
 
+        case OE_FLUSH__TIME:
+                oe->next_flush = timestamp;
+                show_progress = false;
+                break;
+
         case OE_FLUSH__ROUND:
         case OE_FLUSH__NONE:
         default:
@@ -312,7 +317,7 @@ int ordered_events__flush(struct ordered_events *oe, enum oe_flush how)
                    str[how], oe->nr_events);
         pr_oe_time(oe->max_timestamp, "max_timestamp\n");
 
-        err = __ordered_events__flush(oe, show_progress);
+        err = do_flush(oe, show_progress);
 
         if (!err) {
                 if (how == OE_FLUSH__ROUND)
@@ -328,6 +333,16 @@ int ordered_events__flush(struct ordered_events *oe, enum oe_flush how)
         return err;
 }
 
+int ordered_events__flush(struct ordered_events *oe, enum oe_flush how)
+{
+        return __ordered_events__flush(oe, how, 0);
+}
+
+int ordered_events__flush_time(struct ordered_events *oe, u64 timestamp)
+{
+        return __ordered_events__flush(oe, OE_FLUSH__TIME, timestamp);
+}
+
 void ordered_events__init(struct ordered_events *oe, ordered_events__deliver_t deliver,
                           void *data)
 {
diff --git a/tools/perf/util/ordered-events.h b/tools/perf/util/ordered-events.h
index 0c6e26aec0e3..f352af20e167 100644
--- a/tools/perf/util/ordered-events.h
+++ b/tools/perf/util/ordered-events.h
@@ -19,6 +19,7 @@ enum oe_flush {
         OE_FLUSH__ROUND,
         OE_FLUSH__HALF,
         OE_FLUSH__TOP,
+        OE_FLUSH__TIME,
 };
 
 struct ordered_events;
@@ -55,6 +56,7 @@ int ordered_events__queue(struct ordered_events *oe, union perf_event *event,
                           u64 timestamp, u64 file_offset);
 void ordered_events__delete(struct ordered_events *oe, struct ordered_event *event);
 int ordered_events__flush(struct ordered_events *oe, enum oe_flush how);
+int ordered_events__flush_time(struct ordered_events *oe, u64 timestamp);
 void ordered_events__init(struct ordered_events *oe, ordered_events__deliver_t deliver,
                           void *data);
 void ordered_events__free(struct ordered_events *oe);