From: Florin Coras <fcoras@cisco.com>
Date: Thu, 3 Jul 2025 22:00:39 +0000 (-0400)
Subject: vlib: handle worker sync in wait one loop
X-Git-Tag: v26.02-rc0~191
X-Git-Url: https://gerrit.fd.io/r/gitweb?a=commitdiff_plain;h=49d93a7d65eb800642387e8b6a37cd2e76350e36;p=vpp.git

vlib: handle worker sync in wait one loop

Type: improvement

Change-Id: I8dcd9b7d305878eb385eb27481be6a241b4a024c
Signed-off-by: Florin Coras <fcoras@cisco.com>
---

diff --git a/src/vlib/threads.c b/src/vlib/threads.c
index a1839e787c3..8c4a6fe3abd 100644
--- a/src/vlib/threads.c
+++ b/src/vlib/threads.c
@@ -1616,7 +1616,13 @@ vlib_worker_wait_one_loop (void)
   for (ii = 1; ii < vec_len (counts); ii++)
     {
       while (counts[ii] == vgm->vlib_mains[ii]->main_loop_count)
-	CLIB_PAUSE ();
+	{
+	  /* worker sync requested, vlib_worker_sync_rpc probably pending
+	   * so at least one worker cannot make any progress */
+	  if (vlib_worker_threads->wait_before_barrier)
+	    break;
+	  CLIB_PAUSE ();
+	}
     }
 
   vec_free (counts);