Configurable subjective account decay time

docs/01_nodeos/03_plugins/producer_plugin/index.md

@@ -99,6 +99,9 @@ Config Options for eosio::producer_plugin:
                                         transactions in any block before 
                                         returning to normal transaction 
                                         processing.
+  --subjective-account-decay-time-minutes (=1440)
+                                        Sets the time to return full subjective
+                                        cpu for accounts
   --incoming-defer-ratio arg (=1)       ratio between incoming transactions and 
                                         deferred transactions when both are 
                                         queued for execution                                        

plugins/producer_plugin/include/eosio/producer_plugin/subjective_billing.hpp

@@ -48,7 +48,7 @@ class subjective_billing {
       uint64_t              pending_cpu_us;        // tracked cpu us for transactions that may still succeed in a block
       decaying_accumulator  expired_accumulator;   // accumulator used to account for transactions that have expired
 
-      bool empty(uint32_t time_ordinal) {
+      bool empty(uint32_t time_ordinal, uint32_t expired_accumulator_average_window) {
          return pending_cpu_us == 0 && expired_accumulator.value_at(time_ordinal, expired_accumulator_average_window) == 0;
       }
    };
@@ -61,6 +61,7 @@ class subjective_billing {
    account_subjective_bill_cache             _account_subjective_bill_cache;
    block_subjective_bill_cache               _block_subjective_bill_cache;
    std::set<chain::account_name>             _disabled_accounts;
+   uint32_t                                  _expired_accumulator_average_window = config::account_cpu_usage_average_window_ms / subjective_time_interval_ms;
 
 private:
    uint32_t time_ordinal_for( const fc::time_point& t ) const {
@@ -75,15 +76,15 @@ class subjective_billing {
          aitr->second.pending_cpu_us -= entry.subjective_cpu_bill;
          EOS_ASSERT( aitr->second.pending_cpu_us >= 0, chain::tx_resource_exhaustion,
                      "Logic error in subjective account billing ${a}", ("a", entry.account) );
-         if( aitr->second.empty(time_ordinal) ) _account_subjective_bill_cache.erase( aitr );
+         if( aitr->second.empty(time_ordinal, _expired_accumulator_average_window) ) _account_subjective_bill_cache.erase( aitr );
       }
    }
 
    void transition_to_expired( const trx_cache_entry& entry, uint32_t time_ordinal ) {
       auto aitr = _account_subjective_bill_cache.find( entry.account );
       if( aitr != _account_subjective_bill_cache.end() ) {
          aitr->second.pending_cpu_us -= entry.subjective_cpu_bill;
-         aitr->second.expired_accumulator.add(entry.subjective_cpu_bill, time_ordinal, expired_accumulator_average_window);
+         aitr->second.expired_accumulator.add(entry.subjective_cpu_bill, time_ordinal, _expired_accumulator_average_window);
       }
    }
 
@@ -100,7 +101,6 @@ class subjective_billing {
 
 public: // public for tests
    static constexpr uint32_t subjective_time_interval_ms = 5'000;
-   static constexpr uint32_t expired_accumulator_average_window = config::account_cpu_usage_average_window_ms / subjective_time_interval_ms;
 
    void remove_subjective_billing( const transaction_id_type& trx_id, uint32_t time_ordinal ) {
       auto& idx = _trx_cache_index.get<by_id>();
@@ -140,7 +140,7 @@ class subjective_billing {
       if( !_disabled && !_disabled_accounts.count( first_auth ) ) {
          uint32_t bill = std::max<int64_t>( 0, elapsed.count() );
          const auto time_ordinal = time_ordinal_for(now);
-         _account_subjective_bill_cache[first_auth].expired_accumulator.add(bill, time_ordinal, expired_accumulator_average_window);
+         _account_subjective_bill_cache[first_auth].expired_accumulator.add(bill, time_ordinal, _expired_accumulator_average_window);
       }
    }
 
@@ -160,7 +160,7 @@ class subjective_billing {
 
       if (sub_bill_info) {
          EOS_ASSERT(sub_bill_info->pending_cpu_us >= in_block_pending_cpu_us, chain::tx_resource_exhaustion, "Logic error subjective billing ${a}", ("a", first_auth) );
-         uint32_t sub_bill = sub_bill_info->pending_cpu_us - in_block_pending_cpu_us + sub_bill_info->expired_accumulator.value_at(time_ordinal, expired_accumulator_average_window );
+         uint32_t sub_bill = sub_bill_info->pending_cpu_us - in_block_pending_cpu_us + sub_bill_info->expired_accumulator.value_at(time_ordinal, _expired_accumulator_average_window );
          return sub_bill;
       } else {
          return 0;
@@ -204,6 +204,15 @@ class subjective_billing {
       }
       return !exhausted;
    }
+
+   uint32_t get_expired_accumulator_average_window() const {
+      return _expired_accumulator_average_window;
+   }
+
+   void set_expired_accumulator_average_window( fc::microseconds subjective_account_decay_time ) {
+      _expired_accumulator_average_window =
+        subjective_account_decay_time.count() / 1000 / subjective_time_interval_ms;
+   }
 };
 
 } //eosio

plugins/producer_plugin/producer_plugin.cpp

@@ -726,6 +726,8 @@ void producer_plugin::set_program_options(
           "Maximum wall-clock time, in milliseconds, spent retiring scheduled transactions in any block before returning to normal transaction processing.")
          ("subjective-cpu-leeway-us", boost::program_options::value<int32_t>()->default_value( config::default_subjective_cpu_leeway_us ),
           "Time in microseconds allowed for a transaction that starts with insufficient CPU quota to complete and cover its CPU usage.")
+         ("subjective-account-decay-time-minutes", bpo::value<uint32_t>()->default_value( config::account_cpu_usage_average_window_ms / 1000 / 60 ),
+          "Sets the time to return full subjective cpu for accounts")
          ("incoming-defer-ratio", bpo::value<double>()->default_value(1.0),
           "ratio between incoming transactions and deferred transactions when both are queued for execution")
          ("incoming-transaction-queue-size-mb", bpo::value<uint16_t>()->default_value( 1024 ),
@@ -915,6 +917,11 @@ void producer_plugin::plugin_initialize(const boost::program_options::variables_
       chain.set_subjective_cpu_leeway( fc::microseconds( options.at( "subjective-cpu-leeway-us" ).as<int32_t>() ) );
    }
 
+   fc::microseconds subjective_account_decay_time = fc::minutes(options.at( "subjective-account-decay-time-minutes" ).as<uint32_t>());
+   EOS_ASSERT( subjective_account_decay_time.count() > 0, plugin_config_exception,
+               "subjective-account-decay-time-minutes ${dt} must be greater than 0", ("dt", subjective_account_decay_time.to_seconds() * 60));
+   my->_subjective_billing.set_expired_accumulator_average_window( subjective_account_decay_time );
+
    my->_max_transaction_time_ms = options.at("max-transaction-time").as<int32_t>();
 
    my->_max_irreversible_block_age_us = fc::seconds(options.at("max-irreversible-block-age").as<int32_t>());

plugins/producer_plugin/test/test_subjective_billing.cpp

@@ -27,8 +27,10 @@ BOOST_AUTO_TEST_CASE( subjective_bill_test ) {
    account_name c = "c"_n;
 
    const auto now = time_point::now();
-   const auto halftime = now + fc::milliseconds(subjective_billing::expired_accumulator_average_window * subjective_billing::subjective_time_interval_ms / 2);
-   const auto endtime = now + fc::milliseconds(subjective_billing::expired_accumulator_average_window * subjective_billing::subjective_time_interval_ms);
+
+   subjective_billing timing_sub_bill;
+   const auto halftime = now + fc::milliseconds(timing_sub_bill.get_expired_accumulator_average_window() * subjective_billing::subjective_time_interval_ms / 2);
+   const auto endtime = now + fc::milliseconds(timing_sub_bill.get_expired_accumulator_average_window() * subjective_billing::subjective_time_interval_ms);
 
 
    {  // Failed transactions remain until expired in subjective billing.
@@ -129,7 +131,6 @@ BOOST_AUTO_TEST_CASE( subjective_bill_test ) {
 
    { // expired handling logic, full billing until expiration then failed/decay logic
       subjective_billing sub_bill;
-      constexpr uint32_t window_size = subjective_billing::expired_accumulator_average_window;
 
       sub_bill.subjective_bill( id1, now, a, fc::microseconds( 1024 ), false );
       sub_bill.subjective_bill( id2, now + fc::microseconds(1), a, fc::microseconds( 1024 ), false );