aboutsummaryrefslogtreecommitdiffstats
path: root/tools/perf/builtin-lock.c
diff options
context:
space:
mode:
Diffstat (limited to 'tools/perf/builtin-lock.c')
-rw-r--r--tools/perf/builtin-lock.c148
1 files changed, 146 insertions, 2 deletions
diff --git a/tools/perf/builtin-lock.c b/tools/perf/builtin-lock.c
index fb9ab2ad3f9..e12c844df1e 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",