#include <vnet/session/session_debug.h>
#include <svm/message_queue.h>
#include <svm/fifo_segment.h>
+#include <vlib/dma/dma.h>
#define foreach_session_input_error \
_(NO_SESSION, "No session drops") \
SESSION_WRK_F_ADAPTIVE = 1 << 0,
} __clib_packed session_wrk_flag_t;
+#define DMA_TRANS_SIZE 1024
+typedef struct
+{
+ u32 *pending_tx_buffers;
+ u16 *pending_tx_nexts;
+} session_dma_transfer;
+
typedef struct session_worker_
{
CLIB_CACHE_LINE_ALIGN_MARK (cacheline0);
/** Head of list of pending events */
clib_llist_index_t old_head;
- /** Peekers rw lock */
- clib_rwlock_t peekers_rw_locks;
-
/** Vector of buffers to be sent */
u32 *pending_tx_buffers;
/** List head for first worker evts pending handling on main */
clib_llist_index_t evts_pending_main;
+ int config_index;
+ u8 dma_enabled;
+ session_dma_transfer *dma_trans;
+ u16 trans_head;
+ u16 trans_tail;
+ u16 trans_size;
+ u16 batch_num;
+ vlib_dma_batch_t *batch;
+
#if SESSION_DEBUG
/** last event poll time by thread */
clib_time_type_t last_event_poll;
transport_proto_t last_transport_proto_type;
/** Number of workers at pool realloc barrier */
- u32 pool_realloc_at_barrier;
+ volatile u32 pool_realloc_at_barrier;
+
+ /** Number of workers doing reallocs */
+ volatile u32 pool_realloc_doing_work;
/** Lock to synchronize parallel forced reallocs */
clib_spinlock_t pool_realloc_lock;
/** Session ssvm segment configs*/
uword wrk_mqs_segment_size;
+ /** Session enable dma*/
+ u8 dma_enabled;
+
/** Session table size parameters */
u32 configured_v4_session_table_buckets;
u32 configured_v4_session_table_memory;
u64 session_segment_handle (session_t * s);
/**
- * Acquires a lock that blocks a session pool from expanding.
- *
- * This is typically used for safely peeking into other threads'
- * pools in order to clone elements. Lock should be dropped as soon
- * as possible by calling @ref session_pool_remove_peeker.
+ * Get session from handle and avoid pool validation if no same thread
*
- * NOTE: Avoid using pool_elt_at_index while the lock is held because
- * it may lead to free elt bitmap expansion/contraction!
- */
-always_inline void
-session_pool_add_peeker (u32 thread_index)
-{
- session_worker_t *wrk = &session_main.wrk[thread_index];
- if (thread_index == vlib_get_thread_index ())
- return;
- clib_rwlock_reader_lock (&wrk->peekers_rw_locks);
-}
-
-always_inline void
-session_pool_remove_peeker (u32 thread_index)
-{
- session_worker_t *wrk = &session_main.wrk[thread_index];
- if (thread_index == vlib_get_thread_index ())
- return;
- clib_rwlock_reader_unlock (&wrk->peekers_rw_locks);
-}
-
-/**
- * Get session from handle and 'lock' pool resize if not in same thread
- *
- * Caller should drop the peek 'lock' as soon as possible.
+ * Peekers are fine because pool grows with barrier (see @ref session_alloc)
*/
always_inline session_t *
session_get_from_handle_safe (u64 handle)
}
else
{
- session_pool_add_peeker (thread_index);
- /* Don't use pool_elt_at index. See @ref session_pool_add_peeker */
+ /* Don't use pool_elt_at index to avoid pool bitmap reallocs */
return wrk->sessions + session_index_from_handle (handle);
}
}
-always_inline u32
-session_get_index (session_t * s)
-{
- return (s - session_main.wrk[s->thread_index].sessions);
-}
-
always_inline session_t *
session_clone_safe (u32 session_index, u32 thread_index)
{
+ u32 current_thread_index = vlib_get_thread_index (), new_index;
session_t *old_s, *new_s;
- u32 current_thread_index = vlib_get_thread_index ();
- /* If during the memcpy pool is reallocated AND the memory allocator
- * decides to give the old chunk of memory to somebody in a hurry to
- * scribble something on it, we have a problem. So add this thread as
- * a session pool peeker.
- */
- session_pool_add_peeker (thread_index);
new_s = session_alloc (current_thread_index);
+ new_index = new_s->session_index;
+ /* Session pools are reallocated with barrier (see @ref session_alloc) */
old_s = session_main.wrk[thread_index].sessions + session_index;
clib_memcpy_fast (new_s, old_s, sizeof (*new_s));
- session_pool_remove_peeker (thread_index);
new_s->thread_index = current_thread_index;
- new_s->session_index = session_get_index (new_s);
+ new_s->session_index = new_index;
return new_s;
}
u32 offset, u32 max_bytes);
u32 session_tx_fifo_dequeue_drop (transport_connection_t * tc, u32 max_bytes);
+always_inline void
+session_set_state (session_t *s, session_state_t session_state)
+{
+ s->session_state = session_state;
+ SESSION_EVT (SESSION_EVT_STATE_CHANGE, s);
+}
+
always_inline u32
transport_max_rx_enqueue (transport_connection_t * tc)
{
fifo_segment_t *session_main_get_wrk_mqs_segment (void);
void session_node_enable_disable (u8 is_en);
clib_error_t *vnet_session_enable_disable (vlib_main_t * vm, u8 is_en);
-void session_wrk_handle_evts_main_rpc ();
+void session_wrk_handle_evts_main_rpc (void *);
session_t *session_alloc_for_connection (transport_connection_t * tc);
session_t *session_alloc_for_half_open (transport_connection_t *tc);
#define pool_realloc_flag(PH) \
((pool_safe_realloc_header_t *) pool_header (PH))->flag
-#define pool_realloc_safe_aligned(P, align) \
- do \
- { \
- vlib_main_t *vm = vlib_get_main (); \
- u32 free_elts, max_elts, n_alloc; \
- ASSERT (vlib_get_thread_index () == 0); \
- vlib_worker_thread_barrier_sync (vm); \
- free_elts = pool_free_elts (P); \
- max_elts = pool_max_len (P); \
- n_alloc = clib_max (2 * max_elts, POOL_REALLOC_SAFE_ELT_THRESH); \
- pool_alloc_aligned (P, free_elts + n_alloc, align); \
- clib_bitmap_validate (pool_header (P)->free_bitmap, \
- max_elts + n_alloc); \
- pool_realloc_flag (P) = 0; \
- vlib_worker_thread_barrier_release (vm); \
- } \
- while (0)
+typedef struct pool_realloc_rpc_args_
+{
+ void **pool;
+ uword elt_size;
+ uword align;
+} pool_realloc_rpc_args_t;
always_inline void
-pool_program_safe_realloc (void *p, u32 thread_index,
- pool_safe_realloc_rpc_fn *rpc_fn)
+pool_program_safe_realloc_rpc (void *args)
{
- /* Reuse pad as a realloc flag */
- if (pool_realloc_flag (p))
- return;
+ vlib_main_t *vm = vlib_get_main ();
+ u32 free_elts, max_elts, n_alloc;
+ pool_realloc_rpc_args_t *pra;
- pool_realloc_flag (p) = 1;
- session_send_rpc_evt_to_thread (0 /* thread index */, rpc_fn,
- uword_to_pointer (thread_index, void *));
+ ASSERT (vlib_get_thread_index () == 0);
+ pra = (pool_realloc_rpc_args_t *) args;
+
+ vlib_worker_thread_barrier_sync (vm);
+
+ free_elts = _pool_free_elts (*pra->pool, pra->elt_size);
+ if (free_elts < POOL_REALLOC_SAFE_ELT_THRESH)
+ {
+ max_elts = _vec_max_len (*pra->pool, pra->elt_size);
+ n_alloc = clib_max (2 * max_elts, POOL_REALLOC_SAFE_ELT_THRESH);
+ _pool_alloc (pra->pool, free_elts + n_alloc, pra->align, 0,
+ pra->elt_size);
+ }
+ pool_realloc_flag (*pra->pool) = 0;
+ clib_mem_free (args);
+
+ vlib_worker_thread_barrier_release (vm);
}
always_inline void
-pool_realloc_maybe_wait_at_barrier (void)
+pool_program_safe_realloc (void **p, u32 elt_size, u32 align)
{
- if (!(*vlib_worker_threads->wait_at_barrier))
- return;
+ pool_realloc_rpc_args_t *pra;
- /* Node refork required. Don't stop at the barrier from within a node */
- if (*vlib_worker_threads->node_reforks_required)
+ /* Reuse pad as a realloc flag */
+ if (pool_realloc_flag (*p))
return;
- clib_atomic_fetch_add (vlib_worker_threads->workers_at_barrier, 1);
+ pra = clib_mem_alloc (sizeof (*pra));
+ pra->pool = p;
+ pra->elt_size = elt_size;
+ pra->align = align;
+ pool_realloc_flag (*p) = 1;
- while (*vlib_worker_threads->wait_at_barrier)
- ;
-
- clib_atomic_fetch_add (vlib_worker_threads->workers_at_barrier, -1);
+ session_send_rpc_evt_to_thread (0 /* thread index */,
+ pool_program_safe_realloc_rpc, pra);
}
-#define pool_realloc_all_at_barrier(_not) \
- (*vlib_worker_threads->workers_at_barrier >= (vlib_num_workers () - _not))
-
-#define pool_realloc_safe_force(P) \
- do \
- { \
- ALWAYS_ASSERT (*vlib_worker_threads->node_reforks_required); \
- if (pool_realloc_all_at_barrier (1)) \
- { \
- pool_alloc (P, pool_max_len (P)); \
- } \
- else \
- { \
- session_main_t *sm = &session_main; \
- clib_warning ("forced pool realloc"); \
- clib_atomic_fetch_add (&sm->pool_realloc_at_barrier, 1); \
- while (!pool_realloc_all_at_barrier (sm->pool_realloc_at_barrier)) \
- ; \
- clib_spinlock_lock (&sm->pool_realloc_lock); \
- pool_alloc (P, pool_max_len (P)); \
- clib_spinlock_unlock (&sm->pool_realloc_lock); \
- clib_atomic_fetch_add (&sm->pool_realloc_at_barrier, -1); \
- } \
- } \
- while (0)
-
#define pool_needs_realloc(P) \
((!P) || \
(vec_len (pool_header (P)->free_indices) < POOL_REALLOC_SAFE_ELT_THRESH && \
pool_free_elts (P) < POOL_REALLOC_SAFE_ELT_THRESH))
-#define pool_get_aligned_safe(P, E, thread_index, rpc_fn, align) \
+#define pool_get_aligned_safe(P, E, align) \
do \
{ \
- ASSERT (vlib_get_thread_index () == thread_index || \
- vlib_thread_is_main_w_barrier ()); \
if (PREDICT_FALSE (pool_needs_realloc (P))) \
{ \
if (PREDICT_FALSE (!(P))) \
{ \
- pool_alloc_aligned (P, 2 * POOL_REALLOC_SAFE_ELT_THRESH, \
- align); \
+ pool_alloc_aligned (P, POOL_REALLOC_SAFE_ELT_THRESH, align); \
} \
- else if (PREDICT_FALSE (pool_free_elts (P) < \
- POOL_REALLOC_SAFE_ELT_THRESH / 2)) \
+ else if (PREDICT_FALSE (!pool_free_elts (P))) \
{ \
- volatile typeof (P) *PP = &(P); \
- pool_program_safe_realloc (P, thread_index, rpc_fn); \
- if (thread_index) \
- { \
- while (pool_realloc_flag (P)) \
- { \
- /* If refork required abort and consume existing elt */ \
- if (*vlib_worker_threads->node_reforks_required) \
- { \
- /* All workers at barrier realloc now */ \
- if (pool_realloc_all_at_barrier (1)) \
- pool_alloc_aligned (P, pool_max_len (P), align); \
- break; \
- } \
- pool_realloc_maybe_wait_at_barrier (); \
- } \
- if (pool_free_elts (P) == 0) \
- pool_realloc_safe_force (P); \
- ALWAYS_ASSERT (pool_free_elts (P) > 0); \
- } \
- (P) = *PP; \
+ vlib_workers_sync (); \
+ pool_alloc_aligned (P, pool_max_len (P), align); \
+ vlib_workers_continue (); \
+ ALWAYS_ASSERT (pool_free_elts (P) > 0); \
} \
else \
{ \
- pool_program_safe_realloc (P, thread_index, rpc_fn); \
+ pool_program_safe_realloc ((void **) &(P), sizeof ((P)[0]), \
+ _vec_align (P, align)); \
} \
} \
pool_get_aligned (P, E, align); \
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