[5.0] P2P: Throttle over sync window

plugins/net_plugin/net_plugin.cpp

@@ -892,6 +892,8 @@ namespace eosio {
       std::atomic<size_t>             bytes_sent{0};
       std::atomic<size_t>             block_sync_bytes_received{0};
       std::atomic<size_t>             block_sync_bytes_sent{0};
+      std::chrono::nanoseconds        block_sync_send_start{0ns};    // start of enqueue blocks
+      size_t                          block_sync_send_bytes_sent{0}; // bytes sent in this set of enqueue blocks
       std::atomic<bool>               block_sync_throttling{false};
       std::atomic<std::chrono::nanoseconds>   last_bytes_sent{0ns};
       std::atomic<boost::asio::ip::port_type> remote_endpoint_port{0};
@@ -1460,6 +1462,9 @@ namespace eosio {
       latest_msg_time = std::chrono::system_clock::time_point::min();
       latest_blk_time = std::chrono::system_clock::time_point::min();
       set_state(connection_state::closed);
+      block_sync_send_start = 0ns;
+      block_sync_send_bytes_sent = 0;
+      block_sync_throttling = false;
 
       if( reconnect && !shutdown ) {
          my_impl->connections.start_conn_timer( std::chrono::milliseconds( 100 ),
@@ -1740,25 +1745,38 @@ namespace eosio {
       } FC_LOG_AND_DROP();
       if( sb ) {
          // Skip transmitting block this loop if threshold exceeded
-         if( block_sync_rate_limit > 0 && peer_syncing_from_us ) {
-            auto elapsed = std::chrono::duration_cast<std::chrono::seconds>(get_time() - connection_start_time);
-            auto current_rate = double(block_sync_bytes_sent) / elapsed.count();
+         if (block_sync_send_start == 0ns) { // start of enqueue blocks
+            block_sync_send_start = get_time();
+            block_sync_send_bytes_sent = 0;
+         }
+         if( block_sync_rate_limit > 0 && block_sync_send_bytes_sent > 0 && peer_syncing_from_us ) {
+            auto now = get_time();
+            auto elapsed_us = std::chrono::duration_cast<std::chrono::microseconds>(now - block_sync_send_start);
+            double current_rate = (double(block_sync_bytes_sent) / elapsed_us.count()) * 100000;
+            peer_dlog(this, "start enqueue block time ${st}, now ${t}, elapsed ${e}, rate ${r}, limit ${l}",
+                      ("st", block_sync_send_start.count())("t", now.count())("e", elapsed_us.count())("r", current_rate)("l", block_sync_rate_limit));
             if( current_rate >= block_sync_rate_limit ) {
                block_sync_throttling = true;
                peer_dlog( this, "throttling block sync to peer ${host}:${port}", ("host", log_remote_endpoint_ip)("port", log_remote_endpoint_port));
                return false;
             }
          }
          block_sync_throttling = false;
-         block_sync_bytes_sent += enqueue_block( sb, true );
+         auto sent = enqueue_block( sb, true );
+         block_sync_bytes_sent += sent;
+         block_sync_send_bytes_sent += sent;
          ++peer_requested->last;
          if(num == peer_requested->end_block) {
             peer_requested.reset();
+            block_sync_send_start = 0ns;
+            block_sync_send_bytes_sent = 0;
             peer_dlog( this, "completing enqueue_sync_block ${num}", ("num", num) );
          }
       } else {
          peer_ilog( this, "enqueue sync, unable to fetch block ${num}, sending benign_other go away", ("num", num) );
          peer_requested.reset(); // unable to provide requested blocks
+         block_sync_send_start = 0ns;
+         block_sync_send_bytes_sent = 0;
          no_retry = benign_other;
          enqueue( go_away_message( benign_other ) );
       }

tests/p2p_sync_throttle_test.py

@@ -24,14 +24,14 @@
 appArgs.add(flag='--plugin',action='append',type=str,help='Run nodes with additional plugins')
 appArgs.add(flag='--connection-cleanup-period',type=int,help='Interval in whole seconds to run the connection reaper and metric collection')
 
-args=TestHelper.parse_args({"-p","-d","--keep-logs","--prod-count"
+args=TestHelper.parse_args({"-d","--keep-logs"
                             ,"--dump-error-details","-v","--leave-running"
                             ,"--unshared"},
                             applicationSpecificArgs=appArgs)
-pnodes=args.p
+pnodes=1
 delay=args.d
 debug=args.v
-prod_count = args.prod_count
+prod_count = 2
 total_nodes=4
 dumpErrorDetails=args.dump_error_details
 
@@ -106,10 +106,11 @@ def extractPrometheusMetric(connID: str, metric: str, text: str):
     throttlingNode = cluster.unstartedNodes[0]
     i = throttlingNode.cmd.index('--p2p-listen-endpoint')
     throttleListenAddr = throttlingNode.cmd[i+1]
-    # Using 4000 bytes per second to allow syncing of ~250 transaction blocks resulting from
-    # the trx generators in a reasonable amount of time, while still being able to capture
+    # Using 40 Kilobytes per second to allow syncing of ~250 transaction blocks at ~175 bytes per transaction
+    # (250*175=43750 per block or 87500 per second)
+    # resulting from the trx generators in a reasonable amount of time, while still being able to capture
     # throttling state within the Prometheus update window (3 seconds in this test).
-    throttlingNode.cmd[i+1] = throttlingNode.cmd[i+1] + ':4000B/s'
+    throttlingNode.cmd[i+1] = throttlingNode.cmd[i+1] + ':40KB/s'
     throttleListenIP, throttleListenPort = throttleListenAddr.split(':')
     throttlingNode.cmd.append('--p2p-listen-endpoint')
     throttlingNode.cmd.append(f'{throttleListenIP}:{int(throttleListenPort)+100}:1TB/s')
@@ -213,7 +214,7 @@ def extractPrometheusMetric(connID: str, metric: str, text: str):
         if throttledState:
             wasThrottled = True
             break
-    assert throttledNode.waitForBlock(endLargeBlocksHeadBlock, timeout=30), f'Wait for block {endLargeBlocksHeadBlock} on sync node timed out'
+    assert throttledNode.waitForBlock(endLargeBlocksHeadBlock, timeout=90), f'Wait for block {endLargeBlocksHeadBlock} on sync node timed out'
     endThrottledSync = time.time()
     response = throttledNode.processUrllibRequest('prometheus', 'metrics', exitOnError=True, returnType=ReturnType.raw, printReturnLimit=16).decode()
     Print('Throttled Node End State')