ofproto-dpif-xlate: optimize 0% sampling

When sampling field is 0, no need to generate sample or the inner action. Signed-off-by: Benli Ye <[email protected]> Signed-off-by: Ben Pfaff <[email protected]>
grizax · Dec 23, 2016 · b97f2c3 · b97f2c3
1 parent 95f2f97
commit b97f2c3
Showing 1 changed file with 5 additions and 0 deletions.
diff --git a/ofproto/ofproto-dpif-xlate.c b/ofproto/ofproto-dpif-xlate.c
@@ -2506,6 +2506,11 @@ compose_sample_action(struct xlate_ctx *ctx,
                       const odp_port_t tunnel_out_port,
                       bool include_actions)
 {
+    if (probability == 0) {
+        /* No need to generate sampling or the inner action. */
+        return 0;
+    }
+
     size_t sample_offset = nl_msg_start_nested(ctx->odp_actions,
                                                OVS_ACTION_ATTR_SAMPLE);