Improve banking_stage performance messages

Use transaction count instead of batch count,
and set the recv_start from when we finished processing
the previous batch to get a more accurate number.

core/src/banking_stage.rs

@@ -76,10 +76,16 @@ impl BankingStage {
                 let poh_recorder = poh_recorder.clone();
                 let cluster_info = cluster_info.clone();
                 let exit = exit.clone();
+                let mut recv_start = Instant::now();
                 Builder::new()
                     .name("solana-banking-stage-tx".to_string())
                     .spawn(move || {
-                        Self::process_loop(&verified_receiver, &poh_recorder, &cluster_info);
+                        Self::process_loop(
+                            &verified_receiver,
+                            &poh_recorder,
+                            &cluster_info,
+                            &mut recv_start,
+                        );
                         exit.store(true, Ordering::Relaxed);
                     })
                     .unwrap()
@@ -168,6 +174,7 @@ impl BankingStage {
         verified_receiver: &Arc<Mutex<Receiver<VerifiedPackets>>>,
         poh_recorder: &Arc<Mutex<PohRecorder>>,
         cluster_info: &Arc<RwLock<ClusterInfo>>,
+        recv_start: &mut Instant,
     ) {
         let socket = UdpSocket::bind("0.0.0.0:0").unwrap();
         let mut buffered_packets = vec![];
@@ -181,7 +188,7 @@ impl BankingStage {
                 buffered_packets.clear();
             }
 
-            match Self::process_packets(&verified_receiver, &poh_recorder) {
+            match Self::process_packets(&verified_receiver, &poh_recorder, recv_start) {
                 Err(Error::RecvTimeoutError(RecvTimeoutError::Timeout)) => (),
                 Ok(unprocessed_packets) => {
                     if Self::should_buffer_packets(poh_recorder, cluster_info) {
@@ -360,23 +367,22 @@ impl BankingStage {
     pub fn process_packets(
         verified_receiver: &Arc<Mutex<Receiver<VerifiedPackets>>>,
         poh: &Arc<Mutex<PohRecorder>>,
+        recv_start: &mut Instant,
     ) -> Result<UnprocessedPackets> {
-        let recv_start = Instant::now();
         let mms = verified_receiver
             .lock()
             .unwrap()
             .recv_timeout(Duration::from_millis(100))?;
 
-        let mut reqs_len = 0;
         let mms_len = mms.len();
+        let count = mms.iter().map(|x| x.1.len()).sum();
         debug!(
-            "@{:?} process start stalled for: {:?}ms batches: {}",
+            "@{:?} process start stalled for: {:?}ms txs: {}",
             timing::timestamp(),
             timing::duration_as_ms(&recv_start.elapsed()),
-            mms.len(),
+            count,
         );
         inc_new_counter_info!("banking_stage-entries_received", mms_len);
-        let count = mms.iter().map(|x| x.1.len()).sum();
         let proc_start = Instant::now();
         let mut new_tx_count = 0;
 
@@ -397,7 +403,6 @@ impl BankingStage {
             debug!("banking-stage-tx bank {}", bank.slot());
 
             let transactions = Self::deserialize_transactions(&msgs.read().unwrap());
-            reqs_len += transactions.len();
 
             debug!(
                 "bank: {} transactions received {}",
@@ -443,16 +448,18 @@ impl BankingStage {
         let total_time_s = timing::duration_as_s(&proc_start.elapsed());
         let total_time_ms = timing::duration_as_ms(&proc_start.elapsed());
         debug!(
-            "@{:?} done processing transaction batches: {} time: {:?}ms reqs: {} reqs/s: {}",
+            "@{:?} done processing transaction batches: {} time: {:?}ms tx count: {} tx/s: {}",
             timing::timestamp(),
             mms_len,
             total_time_ms,
-            reqs_len,
-            (reqs_len as f32) / (total_time_s)
+            new_tx_count,
+            (new_tx_count as f32) / (total_time_s)
         );
         inc_new_counter_info!("banking_stage-process_packets", count);
         inc_new_counter_info!("banking_stage-process_transactions", new_tx_count);
 
+        *recv_start = Instant::now();
+
         Ok(unprocessed_packets)
     }
 }