1 files changed, 146 insertions, 2 deletions

diff --git a/tools/perf/builtin-lock.c b/tools/perf/builtin-lock.c
index fb9ab2ad3f92..e12c844df1e2 100644
--- a/tools/perf/builtin-lock.c
+++ b/tools/perf/builtin-lock.c
@@ -460,6 +460,150 @@ process_raw_event(void *data, int cpu,
                 process_lock_release_event(data, event, cpu, timestamp, thread);
 }
 
+struct raw_event_queue {
+        u64                     timestamp;
+        int                     cpu;
+        void                    *data;
+        struct thread           *thread;
+        struct list_head        list;
+};
+
+static LIST_HEAD(raw_event_head);
+
+#define FLUSH_PERIOD    (5 * NSEC_PER_SEC)
+
+static u64 flush_limit = ULLONG_MAX;
+static u64 last_flush = 0;
+struct raw_event_queue *last_inserted;
+
+static void flush_raw_event_queue(u64 limit)
+{
+        struct raw_event_queue *tmp, *iter;
+
+        list_for_each_entry_safe(iter, tmp, &raw_event_head, list) {
+                if (iter->timestamp > limit)
+                        return;
+
+                if (iter == last_inserted)
+                        last_inserted = NULL;
+
+                process_raw_event(iter->data, iter->cpu, iter->timestamp,
+                                  iter->thread);
+
+                last_flush = iter->timestamp;
+                list_del(&iter->list);
+                free(iter->data);
+                free(iter);
+        }
+}
+
+static void __queue_raw_event_end(struct raw_event_queue *new)
+{
+        struct raw_event_queue *iter;
+
+        list_for_each_entry_reverse(iter, &raw_event_head, list) {
+                if (iter->timestamp < new->timestamp) {
+                        list_add(&new->list, &iter->list);
+                        return;
+                }
+        }
+
+        list_add(&new->list, &raw_event_head);
+}
+
+static void __queue_raw_event_before(struct raw_event_queue *new,
+                                     struct raw_event_queue *iter)
+{
+        list_for_each_entry_continue_reverse(iter, &raw_event_head, list) {
+                if (iter->timestamp < new->timestamp) {
+                        list_add(&new->list, &iter->list);
+                        return;
+                }
+        }
+
+        list_add(&new->list, &raw_event_head);
+}
+
+static void __queue_raw_event_after(struct raw_event_queue *new,
+                                     struct raw_event_queue *iter)
+{
+        list_for_each_entry_continue(iter, &raw_event_head, list) {
+                if (iter->timestamp > new->timestamp) {
+                        list_add_tail(&new->list, &iter->list);
+                        return;
+                }
+        }
+        list_add_tail(&new->list, &raw_event_head);
+}
+
+/* The queue is ordered by time */
+static void __queue_raw_event(struct raw_event_queue *new)
+{
+        if (!last_inserted) {
+                __queue_raw_event_end(new);
+                return;
+        }
+
+        /*
+         * Most of the time the current event has a timestamp
+         * very close to the last event inserted, unless we just switched
+         * to another event buffer. Having a sorting based on a list and
+         * on the last inserted event that is close to the current one is
+         * probably more efficient than an rbtree based sorting.
+         */
+        if (last_inserted->timestamp >= new->timestamp)
+                __queue_raw_event_before(new, last_inserted);
+        else
+                __queue_raw_event_after(new, last_inserted);
+}
+
+static void queue_raw_event(void *data, int raw_size, int cpu,
+                            u64 timestamp, struct thread *thread)
+{
+        struct raw_event_queue *new;
+
+        if (flush_limit == ULLONG_MAX)
+                flush_limit = timestamp + FLUSH_PERIOD;
+
+        if (timestamp < last_flush) {
+                printf("Warning: Timestamp below last timeslice flush\n");
+                return;
+        }
+
+        new = malloc(sizeof(*new));
+        if (!new)
+                die("Not enough memory\n");
+
+        new->timestamp = timestamp;
+        new->cpu = cpu;
+        new->thread = thread;
+
+        new->data = malloc(raw_size);
+        if (!new->data)
+                die("Not enough memory\n");
+
+        memcpy(new->data, data, raw_size);
+
+        __queue_raw_event(new);
+        last_inserted = new;
+
+        /*
+         * We want to have a slice of events covering 2 * FLUSH_PERIOD
+         * If FLUSH_PERIOD is big enough, it ensures every events that occured
+         * in the first half of the timeslice have all been buffered and there
+         * are none remaining (we need that because of the weakly ordered
+         * event recording we have). Then once we reach the 2 * FLUSH_PERIOD
+         * timeslice, we flush the first half to be gentle with the memory
+         * (the second half can still get new events in the middle, so wait
+         * another period to flush it)
+         */
+        if (new->timestamp > flush_limit &&
+                new->timestamp - flush_limit > FLUSH_PERIOD) {
+                flush_limit += FLUSH_PERIOD;
+                flush_raw_event_queue(flush_limit);
+        }
+}
+
 static int process_sample_event(event_t *event, struct perf_session *session)
 {
         struct thread *thread;
@@ -480,7 +624,7 @@ static int process_sample_event(event_t *event, struct perf_session *session)
         if (profile_cpu != -1 && profile_cpu != (int) data.cpu)
                 return 0;
 
-        process_raw_event(data.raw_data, data.cpu, data.time, thread);
+        queue_raw_event(data.raw_data, data.raw_size, data.cpu, data.time, thread);
 
         return 0;
 }
@@ -576,6 +720,7 @@ static void __cmd_report(void)
         setup_pager();
         select_key();
         read_events();
+        flush_raw_event_queue(ULLONG_MAX);
         sort_result();
         print_result();
 }
@@ -608,7 +753,6 @@ static const char *record_args[] = {
         "record",
         "-a",
         "-R",
-        "-M",
         "-f",
         "-m", "1024",
         "-c", "1",