session: basic support for interrupt mode

[vpp.git] / src / vnet / session / session.h

diff --git a/src/vnet/session/session.h b/src/vnet/session/session.h
index 5586316..93278d6 100644 (file)
--- a/src/vnet/session/session.h
+++ b/src/vnet/session/session.h
@@ -69,6 +69,18 @@ typedef struct session_ctrl_evt_data_
   u8 data[SESSION_CTRL_MSG_MAX_SIZE];
 } session_evt_ctrl_data_t;
 
+typedef enum session_wrk_state_
+{
+  SESSION_WRK_POLLING,
+  SESSION_WRK_INTERRUPT,
+  SESSION_WRK_IDLE,
+} __clib_packed session_wrk_state_t;
+
+typedef enum session_wrk_flags_
+{
+  SESSION_WRK_F_ADAPTIVE = 1 << 0,
+} __clib_packed session_wrk_flag_t;
+
 typedef struct session_worker_
 {
   CLIB_CACHE_LINE_ALIGN_MARK (cacheline0);
@@ -91,6 +103,15 @@ typedef struct session_worker_
   /** Per-proto vector of sessions to enqueue */
   u32 **session_to_enqueue;
 
+  /** Timerfd used to periodically signal wrk session queue node */
+  u32 timerfd;
+
+  /** Worker flags */
+  session_wrk_flag_t flags;
+
+  /** Worker state */
+  session_wrk_state_t state;
+
   /** Context for session tx */
   session_tx_context_t ctx;
 
@@ -121,6 +142,9 @@ typedef struct session_worker_
   /** Vector of nexts for the pending tx buffers */
   u16 *pending_tx_nexts;
 
+  /** Clib file for timerfd. Used only if adaptive mode is on */
+  uword timerfd_file;
+
 #if SESSION_DEBUG
   /** last event poll time by thread */
   clib_time_type_t last_event_poll;
@@ -177,6 +201,9 @@ typedef struct session_main_
   /** Allocate private rx mqs for external apps */
   u8 use_private_rx_mqs;
 
+  /** Do not enable session queue node adaptive mode */
+  u8 no_adaptive;
+
   /** vpp fifo event queue configured length */
   u32 configured_event_queue_length;
 
@@ -682,6 +709,8 @@ session_add_pending_tx_buffer (u32 thread_index, u32 bi, u32 next_node)
   session_worker_t *wrk = session_main_get_worker (thread_index);
   vec_add1 (wrk->pending_tx_buffers, bi);
   vec_add1 (wrk->pending_tx_nexts, next_node);
+  if (PREDICT_FALSE (wrk->state == SESSION_WRK_INTERRUPT))
+    vlib_node_set_interrupt_pending (wrk->vm, session_queue_node.index);
 }
 
 always_inline void
@@ -691,6 +720,7 @@ session_wrk_update_time (session_worker_t *wrk, f64 now)
   wrk->last_vlib_us_time = wrk->last_vlib_time * CLIB_US_TIME_FREQ;
 }
 
+void session_wrk_enable_adaptive_mode (session_worker_t *wrk);
 fifo_segment_t *session_main_get_evt_q_segment (void);
 void session_node_enable_disable (u8 is_en);
 clib_error_t *vnet_session_enable_disable (vlib_main_t * vm, u8 is_en);