/*
- * Copyright (C) 2011 Julien Desfossez <julien.desfossez@polymtl.ca>
+ * Copyright (C) 2011 EfficiOS Inc.
* Copyright (C) 2011 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
* Copyright (C) 2013 David Goulet <dgoulet@efficios.com>
*
#include <unistd.h>
#include <common/common.h>
+#include <common/consumer/consumer-timer.h>
+#include <common/consumer/consumer-timer.h>
+#include <common/consumer/consumer.h>
+#include <common/consumer/consumer.h>
+#include <common/consumer/metadata-bucket.h>
+#include <common/consumer/metadata-bucket.h>
#include <common/index/index.h>
#include <common/kernel-consumer/kernel-consumer.h>
+#include <common/kernel-ctl/kernel-ctl.h>
+#include <common/macros.h>
#include <common/relayd/relayd.h>
#include <common/ust-consumer/ust-consumer.h>
#include <common/utils.h>
-#include <common/consumer/consumer.h>
-#include <common/consumer/consumer-timer.h>
-#include <common/consumer/metadata-bucket.h>
-#include <common/kernel-ctl/kernel-ctl.h>
#include "consumer-stream.h"
pthread_mutex_unlock(&stream->chan->lock);
}
+static void consumer_stream_data_assert_locked_all(struct lttng_consumer_stream *stream)
+{
+ ASSERT_LOCKED(stream->lock);
+ ASSERT_LOCKED(stream->chan->lock);
+}
+
static void consumer_stream_metadata_lock_all(struct lttng_consumer_stream *stream)
{
consumer_stream_data_lock_all(stream);
consumer_stream_data_unlock_all(stream);
}
+static void consumer_stream_metadata_assert_locked_all(struct lttng_consumer_stream *stream)
+{
+ ASSERT_LOCKED(stream->metadata_rdv_lock);
+ consumer_stream_data_assert_locked_all(stream);
+}
+
/* Only used for data streams. */
static int consumer_stream_update_stats(struct lttng_consumer_stream *stream,
const struct stream_subbuffer *subbuf)
}
static ssize_t consumer_stream_consume_mmap(
- struct lttng_consumer_local_data *ctx,
+ struct lttng_consumer_local_data *ctx __attribute__((unused)),
struct lttng_consumer_stream *stream,
const struct stream_subbuffer *subbuffer)
{
static int consumer_stream_send_index(
struct lttng_consumer_stream *stream,
const struct stream_subbuffer *subbuffer,
- struct lttng_consumer_local_data *ctx)
+ struct lttng_consumer_local_data *ctx __attribute__((unused)))
{
off_t packet_offset = 0;
struct ctf_packet_index index = {};
const struct stream_subbuffer *subbuffer,
struct lttng_consumer_local_data *ctx)
{
+ bool missed_metadata_flush;
int ret;
/* Block until all the metadata is sent. */
pthread_mutex_lock(&stream->metadata_timer_lock);
stream->waiting_on_metadata = false;
- if (stream->missed_metadata_flush) {
+ missed_metadata_flush = stream->missed_metadata_flush;
+ if (missed_metadata_flush) {
stream->missed_metadata_flush = false;
- pthread_mutex_unlock(&stream->metadata_timer_lock);
- (void) stream->read_subbuffer_ops.send_live_beacon(stream);
- } else {
- pthread_mutex_unlock(&stream->metadata_timer_lock);
}
+ pthread_mutex_unlock(&stream->metadata_timer_lock);
if (ret < 0) {
goto end;
}
ret = consumer_stream_send_index(stream, subbuffer, ctx);
+ /*
+ * Send the live inactivity beacon to handle the situation where
+ * the live timer is prevented from sampling this stream
+ * because the stream lock was being held while this stream is
+ * waiting on metadata. This ensures live viewer progress in the
+ * unlikely scenario where a live timer would be prevented from
+ * locking a stream lock repeatedly due to a steady flow of
+ * incoming metadata, for a stream which is mostly inactive.
+ *
+ * It is important to send the inactivity beacon packet to
+ * relayd _after_ sending the index associated with the data
+ * that was just sent, otherwise this can cause live viewers to
+ * observe timestamps going backwards between an inactivity
+ * beacon and a following trace packet.
+ */
+ if (missed_metadata_flush) {
+ (void) stream->read_subbuffer_ops.send_live_beacon(stream);
+ }
end:
return ret;
}
*/
static
int post_consume_open_new_packet(struct lttng_consumer_stream *stream,
- const struct stream_subbuffer *subbuffer,
- struct lttng_consumer_local_data *ctx)
+ const struct stream_subbuffer *subbuffer __attribute__((unused)),
+ struct lttng_consumer_local_data *ctx __attribute__((unused)))
{
int ret = 0;
goto error;
}
+ stream->send_node = CDS_LIST_HEAD_INIT(stream->send_node);
stream->chan = channel;
stream->key = stream_key;
stream->trace_chunk = trace_chunk;
consumer_stream_metadata_lock_all;
stream->read_subbuffer_ops.unlock =
consumer_stream_metadata_unlock_all;
+ stream->read_subbuffer_ops.assert_locked =
+ consumer_stream_metadata_assert_locked_all;
stream->read_subbuffer_ops.pre_consume_subbuffer =
metadata_stream_check_version;
} else {
stream->read_subbuffer_ops.lock = consumer_stream_data_lock_all;
stream->read_subbuffer_ops.unlock =
consumer_stream_data_unlock_all;
+ stream->read_subbuffer_ops.assert_locked =
+ consumer_stream_data_assert_locked_all;
stream->read_subbuffer_ops.pre_consume_subbuffer =
consumer_stream_update_stats;
}
{
LTTNG_ASSERT(stream);
+ cds_list_del_init(&stream->send_node);
+
/* Stream is in monitor mode. */
if (stream->monitor) {
struct lttng_consumer_channel *free_chan = NULL;
* If the stream is not visible globally, this needs to be done
* outside of the consumer data lock section.
*/
+ destroy_close_stream(stream);
free_chan = unref_channel(stream);
}
}
static ssize_t metadata_bucket_consume(
- struct lttng_consumer_local_data *unused,
+ struct lttng_consumer_local_data *unused __attribute__((unused)),
struct lttng_consumer_stream *stream,
const struct stream_subbuffer *subbuffer)
{