struct lttng_ust_lib_ring_buffer_backend_pages {
unsigned long mmap_offset; /* offset of the subbuffer in mmap */
union v_atomic records_commit; /* current records committed count */
union v_atomic records_unread; /* records to read */
unsigned long data_size; /* Amount of data to read from subbuf */
DECLARE_SHMP(char, p); /* Backing memory map */
struct lttng_ust_lib_ring_buffer_backend_pages {
unsigned long mmap_offset; /* offset of the subbuffer in mmap */
union v_atomic records_commit; /* current records committed count */
union v_atomic records_unread; /* records to read */
unsigned long data_size; /* Amount of data to read from subbuf */
DECLARE_SHMP(char, p); /* Backing memory map */
+struct lttng_ust_lib_ring_buffer_backend_counts {
+ /*
+ * Counter specific to the sub-buffer location within the ring buffer.
+ * The actual sequence number of the packet within the entire ring
+ * buffer can be derived from the formula nr_subbuffers * seq_cnt +
+ * subbuf_idx.
+ */
+ uint64_t seq_cnt; /* packet sequence number */
+};
+
struct lttng_ust_lib_ring_buffer_backend {
/* Array of ring_buffer_backend_subbuffer for writer */
DECLARE_SHMP(struct lttng_ust_lib_ring_buffer_backend_subbuffer, buf_wsb);
/* ring_buffer_backend_subbuffer for reader */
struct lttng_ust_lib_ring_buffer_backend_subbuffer buf_rsb;
struct lttng_ust_lib_ring_buffer_backend {
/* Array of ring_buffer_backend_subbuffer for writer */
DECLARE_SHMP(struct lttng_ust_lib_ring_buffer_backend_subbuffer, buf_wsb);
/* ring_buffer_backend_subbuffer for reader */
struct lttng_ust_lib_ring_buffer_backend_subbuffer buf_rsb;
/*
* Pointer array of backend pages, for whole buffer.
* Indexed by ring_buffer_backend_subbuffer identifier (id) index.
/*
* Pointer array of backend pages, for whole buffer.
* Indexed by ring_buffer_backend_subbuffer identifier (id) index.
DECLARE_SHMP(struct channel, chan); /* Associated channel */
int cpu; /* This buffer's cpu. -1 if global. */
union v_atomic records_read; /* Number of records read */
DECLARE_SHMP(struct channel, chan); /* Associated channel */
int cpu; /* This buffer's cpu. -1 if global. */
union v_atomic records_read; /* Number of records read */
};
struct lttng_ust_lib_ring_buffer_shmp {
DECLARE_SHMP(struct lttng_ust_lib_ring_buffer, shmp); /* Channel per-cpu buffers */
};
};
struct lttng_ust_lib_ring_buffer_shmp {
DECLARE_SHMP(struct lttng_ust_lib_ring_buffer, shmp); /* Channel per-cpu buffers */
};
unsigned long num_subbuf; /* Number of sub-buffers for writer */
uint64_t start_tsc; /* Channel creation TSC value */
DECLARE_SHMP(void *, priv_data);/* Client-specific information */
struct lttng_ust_lib_ring_buffer_config config; /* Ring buffer configuration */
char name[NAME_MAX]; /* Channel name */
unsigned long num_subbuf; /* Number of sub-buffers for writer */
uint64_t start_tsc; /* Channel creation TSC value */
DECLARE_SHMP(void *, priv_data);/* Client-specific information */
struct lttng_ust_lib_ring_buffer_config config; /* Ring buffer configuration */
char name[NAME_MAX]; /* Channel name */