X-Git-Url: http://git.lttng.org/?a=blobdiff_plain;f=libust%2Fltt-ring-buffer-client.h;h=605a28284e7e32c74664ff25190db46b7c7ddad5;hb=381c0f1ef474e0ae8a96b3753470ca4bda45c764;hp=dce34aa24597d35548069aa03e582cd2bbabf34b;hpb=1dbfff0c0126804b07e9c11ba2307f65a95a650b;p=lttng-ust.git diff --git a/libust/ltt-ring-buffer-client.h b/libust/ltt-ring-buffer-client.h index dce34aa2..605a2828 100644 --- a/libust/ltt-ring-buffer-client.h +++ b/libust/ltt-ring-buffer-client.h @@ -293,13 +293,15 @@ static size_t client_packet_header_size(void) } static void client_buffer_begin(struct lib_ring_buffer *buf, u64 tsc, - unsigned int subbuf_idx) + unsigned int subbuf_idx, + struct shm_handle *handle) { - struct channel *chan = shmp(buf->backend.chan); + struct channel *chan = shmp(handle, buf->backend.chan); struct packet_header *header = (struct packet_header *) lib_ring_buffer_offset_address(&buf->backend, - subbuf_idx * chan->backend.subbuf_size); + subbuf_idx * chan->backend.subbuf_size, + handle); struct ltt_channel *ltt_chan = channel_get_private(chan); struct ltt_session *session = ltt_chan->session; @@ -319,31 +321,37 @@ static void client_buffer_begin(struct lib_ring_buffer *buf, u64 tsc, * subbuffer. data_size is between 1 and subbuf_size. */ static void client_buffer_end(struct lib_ring_buffer *buf, u64 tsc, - unsigned int subbuf_idx, unsigned long data_size) + unsigned int subbuf_idx, unsigned long data_size, + struct shm_handle *handle) { - struct channel *chan = shmp(buf->backend.chan); + struct channel *chan = shmp(handle, buf->backend.chan); struct packet_header *header = (struct packet_header *) lib_ring_buffer_offset_address(&buf->backend, - subbuf_idx * chan->backend.subbuf_size); + subbuf_idx * chan->backend.subbuf_size, + handle); unsigned long records_lost = 0; header->ctx.timestamp_end = tsc; header->ctx.content_size = data_size * CHAR_BIT; /* in bits */ header->ctx.packet_size = PAGE_ALIGN(data_size) * CHAR_BIT; /* in bits */ - records_lost += lib_ring_buffer_get_records_lost_full(&client_config, buf); + /* + * We do not care about the records lost count, because the metadata + * channel waits and retry. + */ + (void) lib_ring_buffer_get_records_lost_full(&client_config, buf); records_lost += lib_ring_buffer_get_records_lost_wrap(&client_config, buf); records_lost += lib_ring_buffer_get_records_lost_big(&client_config, buf); header->ctx.events_discarded = records_lost; } static int client_buffer_create(struct lib_ring_buffer *buf, void *priv, - int cpu, const char *name) + int cpu, const char *name, struct shm_handle *handle) { return 0; } -static void client_buffer_finalize(struct lib_ring_buffer *buf, void *priv, int cpu) +static void client_buffer_finalize(struct lib_ring_buffer *buf, void *priv, int cpu, struct shm_handle *handle) { } @@ -358,51 +366,61 @@ static const struct lib_ring_buffer_config client_config = { .tsc_bits = 32, .alloc = RING_BUFFER_ALLOC_PER_CPU, - .sync = RING_BUFFER_SYNC_PER_CPU, + .sync = RING_BUFFER_SYNC_GLOBAL, .mode = RING_BUFFER_MODE_TEMPLATE, .backend = RING_BUFFER_PAGE, - .output = RING_BUFFER_SPLICE, + .output = RING_BUFFER_MMAP, .oops = RING_BUFFER_OOPS_CONSISTENCY, - .ipi = RING_BUFFER_IPI_BARRIER, - .wakeup = RING_BUFFER_WAKEUP_BY_TIMER, + .ipi = RING_BUFFER_NO_IPI_BARRIER, + .wakeup = RING_BUFFER_WAKEUP_BY_WRITER, }; static -struct shm_handle *_channel_create(const char *name, +struct ltt_channel *_channel_create(const char *name, struct ltt_channel *ltt_chan, void *buf_addr, size_t subbuf_size, size_t num_subbuf, unsigned int switch_timer_interval, unsigned int read_timer_interval) { - return channel_create(&client_config, name, ltt_chan, buf_addr, + ltt_chan->handle = channel_create(&client_config, name, ltt_chan, buf_addr, subbuf_size, num_subbuf, switch_timer_interval, read_timer_interval); + if (!ltt_chan->handle) + return NULL; + ltt_chan->chan = shmp(ltt_chan->handle, ltt_chan->handle->chan); + return ltt_chan; } static -void ltt_channel_destroy(struct shm_handle *handle) +void ltt_channel_destroy(struct ltt_channel *ltt_chan) { - channel_destroy(handle); + channel_destroy(ltt_chan->chan, ltt_chan->handle); } static -struct lib_ring_buffer *ltt_buffer_read_open(struct channel *chan) +struct lib_ring_buffer *ltt_buffer_read_open(struct channel *chan, + struct shm_handle *handle, + int *shm_fd, int *wait_fd, + uint64_t *memory_map_size) { struct lib_ring_buffer *buf; int cpu; for_each_channel_cpu(cpu, chan) { - buf = channel_get_ring_buffer(&client_config, chan, cpu); - if (!lib_ring_buffer_open_read(buf)) + buf = channel_get_ring_buffer(&client_config, chan, + cpu, handle, shm_fd, wait_fd, + memory_map_size); + if (!lib_ring_buffer_open_read(buf, handle)) return buf; } return NULL; } static -void ltt_buffer_read_close(struct lib_ring_buffer *buf) +void ltt_buffer_read_close(struct lib_ring_buffer *buf, + struct shm_handle *handle) { - lib_ring_buffer_release_read(buf); + lib_ring_buffer_release_read(buf, handle); } static @@ -481,7 +499,7 @@ int ltt_is_disabled(struct channel *chan) } static struct ltt_transport ltt_relay_transport = { - .name = "relay-" RING_BUFFER_MODE_TEMPLATE_STRING, + .name = "relay-" RING_BUFFER_MODE_TEMPLATE_STRING "-mmap", .ops = { .channel_create = _channel_create, .channel_destroy = ltt_channel_destroy, @@ -498,16 +516,14 @@ static struct ltt_transport ltt_relay_transport = { }, }; -static -void __attribute__((constructor)) ltt_ring_buffer_client_init(void) +void RING_BUFFER_MODE_TEMPLATE_INIT(void) { - printf("LTT : ltt ring buffer client init\n"); + DBG("LTT : ltt ring buffer client init\n"); ltt_transport_register(<t_relay_transport); } -static -void __attribute__((destructor)) ltt_ring_buffer_client_exit(void) +void RING_BUFFER_MODE_TEMPLATE_EXIT(void) { - printf("LTT : ltt ring buffer client exit\n"); + DBG("LTT : ltt ring buffer client exit\n"); ltt_transport_unregister(<t_relay_transport); }