From: Florin Coras <fcoras@cisco.com>
Date: Thu, 26 Nov 2020 04:26:32 +0000 (-0800)
Subject: vcl: avoid coalescing dgrams on read
X-Git-Tag: v21.06-rc0~106
X-Git-Url: https://gerrit.fd.io/r/gitweb?a=commitdiff_plain;h=refs%2Fchanges%2F44%2F30144%2F2;p=vpp.git

vcl: avoid coalescing dgrams on read

Type: improvement

Signed-off-by: Florin Coras <fcoras@cisco.com>
Change-Id: I035f1ef26202bbcf918548cbaa3cdbc17944bf8a
---

diff --git a/src/vcl/vppcom.c b/src/vcl/vppcom.c
index da7693fa08f..6c85ceedd67 100644
--- a/src/vcl/vppcom.c
+++ b/src/vcl/vppcom.c
@@ -1909,10 +1909,10 @@ read_again:
 	  e->session_index = s->session_index;
 	}
     }
-  else if (PREDICT_FALSE (rv < n))
+  else if (PREDICT_FALSE (rv < n && !s->is_dgram))
     {
       /* More data enqueued while reading. Try to drain it
-       * or fill the buffer */
+       * or fill the buffer. Avoid doing that for dgrams */
       buf += rv;
       n -= rv;
       goto read_again;