Less intrusive way to capture numa_node and cpu_id changes

Change-Id: I3a33fb81f31ed473811e9e7a6197b81135913865
Signed-off-by: Damjan Marion <damarion@cisco.com>

2 files changed, 10 insertions, 3 deletions

diff --git a/src/vlib/unix/input.c b/src/vlib/unix/input.c
index 8be0770bfd3..6b519e5ce95 100644
--- a/src/vlib/unix/input.c
+++ b/src/vlib/unix/input.c
@@ -223,12 +223,13 @@ linux_epoll_input_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
 				      em->epoll_events,
 				      vec_len (em->epoll_events), timeout_ms);
 	  }
+
       }
     else
       {
 	if (timeout_ms)
 	  usleep (timeout_ms * 1000);
-	return 0;
+	goto done;
       }
   }
 
@@ -238,7 +239,7 @@ linux_epoll_input_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
 	vlib_panic_with_error (vm, clib_error_return_unix (0, "epoll_wait"));
 
       /* non fatal error (e.g. EINTR). */
-      return 0;
+      goto done;
     }
 
   em->epoll_waits += 1;
@@ -314,6 +315,13 @@ linux_epoll_input_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
 	}
     }
 
+done:
+  if (PREDICT_FALSE (vm->cpu_id != clib_get_current_cpu_id ()))
+    {
+      vm->cpu_id = clib_get_current_cpu_id ();
+      vm->numa_node = clib_get_current_numa_node ();
+    }
+
   return 0;
 }
 
diff --git a/src/vlib/unix/main.c b/src/vlib/unix/main.c
index ae92d93adc2..08f0506fbc2 100755
--- a/src/vlib/unix/main.c
+++ b/src/vlib/unix/main.c
@@ -671,7 +671,6 @@ vlib_unix_main (int argc, char *argv[])
 
   __os_thread_index = 0;
   vm->thread_index = 0;
-  vm->cpu_id = ~0;
 
   i = clib_calljmp (thread0, (uword) vm,
 		    (void *) (vlib_thread_stacks[0] +