add more appropriate settings for Ask vs. Tell benchmarking in BDN

src/benchmark/Akka.Benchmarks/Actor/ActorMessagingMemoryPressureBenchmark.cs

@@ -11,19 +11,24 @@
 using Akka.Benchmarks.Configurations;
 using Akka.Routing;
 using BenchmarkDotNet.Attributes;
+using BenchmarkDotNet.Engines;
 
 namespace Akka.Benchmarks.Actor
 {
-    [Config(typeof(MonitoringConfig))]
+    [Config(typeof(MacroBenchmarkConfig))]
     public class ActorMessagingMemoryPressureBenchmark
     {
         #region Classes
+
         public sealed class StopActor
         {
-            private StopActor(){}
+            private StopActor()
+            {
+            }
+
             public static readonly StopActor Instance = new();
         }
-        
+
         public sealed class MyActor : ReceiveActor
         {
             public MyActor()
@@ -33,33 +38,54 @@ public MyActor()
                     Context.Stop(Self);
                     Sender.Tell(str);
                 });
-
-                Receive<string>(str =>
+
+                Receive<string>(str => { Sender.Tell(str); });
+            }
+        }
+
+        public sealed class TerminationActor : UntypedActor
+        {
+            private int _remainingMessages;
+            private readonly TaskCompletionSource _taskCompletionSource;
+
+            public TerminationActor(TaskCompletionSource taskCompletionSource,
+                int remainingMessages)
+            {
+                _taskCompletionSource = taskCompletionSource;
+                _remainingMessages = remainingMessages;
+            }
+
+            protected override void OnReceive(object message)
+            {
+                if (--_remainingMessages == 0)
                 {
-                    Sender.Tell(str);
-                });
+                    _taskCompletionSource.SetResult();
+                }
             }
         }
+
         #endregion
-        
+
         private ActorSystem _sys;
         private IActorRef _actorEntryPoint;
+        private IActorRef _terminationActor;
+        private TaskCompletionSource _taskCompletionSource;
 
         private const string Msg = "hit";
 
         public const int MsgCount = 100_000;
-        
-        [Params(10, 100)]
+
+        [Params(1, 10, 100)]
         public int ActorCount { get; set; }
 
         private Task[] _askTasks;
-        
+
         [GlobalSetup]
         public void Setup()
         {
             _sys = ActorSystem.Create("Bench", @"akka.log-dead-letters = off");
         }
-        
+
         [GlobalCleanup]
         public async Task CleanUp()
         {
@@ -70,35 +96,42 @@ public async Task CleanUp()
         public void PerInvokeCleanup()
         {
             _actorEntryPoint.GracefulStop(TimeSpan.FromSeconds(5)).Wait();
+            _terminationActor.GracefulStop(TimeSpan.FromSeconds(5)).Wait();
         }
 
         [IterationSetup]
         public void PerInvokeSetup()
         {
-            _actorEntryPoint = _sys.ActorOf(Props.Create<MyActor>().WithRouter(new BroadcastPool(ActorCount)));
+            _taskCompletionSource = new TaskCompletionSource();
+            if(ActorCount == 1)
+                _actorEntryPoint = _sys.ActorOf(Props.Create<MyActor>());
+            else if(ActorCount > 1)
+                _actorEntryPoint = _sys.ActorOf(Props.Create<MyActor>().WithRouter(new BroadcastPool(ActorCount)));
+            _terminationActor = _sys.ActorOf(Props.Create(() =>
+                new TerminationActor(_taskCompletionSource, MsgCount)));
             _askTasks = new Task[MsgCount];
         }
 
-        [Benchmark(Baseline = true, OperationsPerInvoke = MsgCount)]
+        [Benchmark(Baseline = true, OperationsPerInvoke = MsgCount * 2)]
         public Task PushMsgs()
         {
             for (var i = 0; i < MsgCount; i++)
             {
-               _actorEntryPoint.Tell(Msg);
+                _actorEntryPoint.Tell(Msg, _terminationActor);
             }
 
-            return Task.CompletedTask;
+            return _taskCompletionSource.Task;
         }
-        
-        [Benchmark(OperationsPerInvoke = MsgCount)]
+
+        [Benchmark(OperationsPerInvoke = MsgCount * 2)]
         public Task AskMsgs()
         {
             for (var i = 0; i < MsgCount; i++)
             {
                 _askTasks[i] = _actorEntryPoint.Ask<string>(Msg);
             }
-            
+
             return Task.WhenAll(_askTasks);
         }
     }
-}
+}

src/benchmark/Akka.Benchmarks/Configurations/Configs.cs

@@ -5,12 +5,15 @@
 // </copyright>
 //-----------------------------------------------------------------------
 
+using System;
 using System.Reflection;
 using BenchmarkDotNet.Attributes;
 using BenchmarkDotNet.Columns;
 using BenchmarkDotNet.Configs;
 using BenchmarkDotNet.Diagnosers;
+using BenchmarkDotNet.Engines;
 using BenchmarkDotNet.Exporters;
+using BenchmarkDotNet.Jobs;
 using BenchmarkDotNet.Loggers;
 using BenchmarkDotNet.Reports;
 using BenchmarkDotNet.Running;
@@ -78,4 +81,25 @@ public MonitoringConfig()
             AddColumn(new RequestsPerSecondColumn());
         }
     }
+
+    public class MacroBenchmarkConfig : ManualConfig
+    {
+        public MacroBenchmarkConfig()
+        {
+            int processorCount = Environment.ProcessorCount;
+            IntPtr affinityMask = (IntPtr)((1 << processorCount) - 1);
+
+
+            AddExporter(MarkdownExporter.GitHub);
+            AddColumn(new RequestsPerSecondColumn());
+            AddJob(Job.LongRun
+                .WithGcMode(new GcMode { Server = true, Concurrent = true })
+                .WithWarmupCount(25)
+                .WithIterationCount(50)
+                .RunOncePerIteration()
+                .WithStrategy(RunStrategy.Monitoring)
+                .WithAffinity(affinityMask)
+            );
+        }
+    }
 }