commit c31dc31f84961033ecb6354811e0c360b6cf5f79
author Florin Coras <fcoras@cisco.com> Sun Oct 06 14:06:14 2019 -0700
committer Florin Coras <florin.coras@gmail.com> Thu Oct 10 21:23:14 2019 +0000
tree 46224d5f2b9d126cb6bd5fa289a18186cb172aa5
parent 71a5da0c8dfa12ff012c8c101cf4d2b29fa0b6e3

tcp: improve pacing after idle send periods

Rest pacer on ack reception if we haven't recently sent anything.

Type: feature

Change-Id: I820bacd81b65130052dfafbfcbe6ca4553069fbc
Signed-off-by: Florin Coras <fcoras@cisco.com>

src/vnet/session/session_node.c

diff --git a/src/vnet/session/session_node.c b/src/vnet/session/session_node.c
index 9e53718..f51b892 100644
--- a/src/vnet/session/session_node.c
+++ b/src/vnet/session/session_node.c
@@ -845,6 +845,7 @@
     {
       if (ctx->transport_vft->flush_data)
 	ctx->transport_vft->flush_data (ctx->tc);
+      e->event_type = SESSION_IO_EVT_TX;
     }
 
   if (ctx->s->flags & SESSION_F_CUSTOM_TX)
@@ -883,7 +884,12 @@
   session_tx_set_dequeue_params (vm, ctx, max_burst, peek_data);
 
   if (PREDICT_FALSE (!ctx->max_len_to_snd))
-    return SESSION_TX_NO_DATA;
+    {
+      transport_connection_tx_pacer_reset_bucket (ctx->tc,
+						  vm->clib_time.
+						  last_cpu_time);
+      return SESSION_TX_NO_DATA;
+    }
 
   n_bufs_needed = ctx->n_segs_per_evt * ctx->n_bufs_per_seg;
   vec_validate_aligned (wrk->tx_buffers, n_bufs_needed - 1,