Include counters for how long forwarding takes and number of failed b…

…atches

core/src/banking_stage.rs

@@ -515,7 +515,21 @@ impl BankingStage {
         // in favor of shipping Quic support, which was considered higher-priority
         if !packet_vec.is_empty() {
             inc_new_counter_info!("banking_stage-forwarded_packets", packet_vec.len());
-            if let Err(err) = send_wire_transaction_batch(&packet_vec, tpu_forwards) {
+
+            let mut measure = Measure::start("banking_stage-forward-us");
+
+            let res = send_wire_transaction_batch(&packet_vec, tpu_forwards);
+
+            measure.stop();
+            inc_new_counter_info!(
+                "banking_stage-forward-us",
+                measure.as_us() as usize,
+                1000,
+                1000
+            );
+
+            if let Err(err) = res {
+                inc_new_counter_info!("banking_stage-forward_packets-failed-batches", 1);
                 return (Err(err), 0);
             }
         }