From: Florin Coras <fcoras@cisco.com>
Date: Fri, 3 May 2024 20:23:00 +0000 (-0700)
Subject: vcl: allow more rx events on peek
X-Git-Tag: v24.10-rc0~45
X-Git-Url: https://gerrit.fd.io/r/gitweb?a=commitdiff_plain;h=916ca8d5a08b1eb8c5ce04b5abbc4c817498e424;p=vpp.git

vcl: allow more rx events on peek

If peek touches all data in the fifo, unset fifo event to request new
events when more data is enqueued.

Type: improvement

Signed-off-by: Florin Coras <fcoras@cisco.com>
Change-Id: I878fa017f18ada5cef557600673bba920f230542
---

diff --git a/src/vcl/vppcom.c b/src/vcl/vppcom.c
index 58f6ac0a134..a557093e897 100644
--- a/src/vcl/vppcom.c
+++ b/src/vcl/vppcom.c
@@ -2087,7 +2087,16 @@ read_again:
   ASSERT (rv >= 0);
 
   if (peek)
-    return rv;
+    {
+      /* Request new notifications if more data enqueued */
+      if (rv < n || rv == svm_fifo_max_dequeue_cons (rx_fifo))
+	{
+	  if (is_ct)
+	    svm_fifo_unset_event (s->rx_fifo);
+	  svm_fifo_unset_event (rx_fifo);
+	}
+      return rv;
+    }
 
   n_read += rv;