New EventHubs performance tests (#178)

* rebase, and remove changes to scale monitor

* add hello cities test that prints the history of a nested orchestration

test/PerformanceTests/Benchmarks/Bank/HttpTriggers.cs

@@ -15,6 +15,7 @@ namespace PerformanceTests.Bank
     using System.Collections.Generic;
     using Microsoft.Azure.WebJobs.Extensions.DurableTask;
     using System.Linq;
+    using System.Net;
 
     /// <summary>
     /// A microbenchmark using durable entities for bank accounts, and an orchestration with a critical section for transferring
@@ -37,7 +38,7 @@ namespace PerformanceTests.Bank
             }
             catch (Exception e)
             {
-                return new ObjectResult(e.ToString());
+                return new ObjectResult(e.ToString()) { StatusCode = (int)HttpStatusCode.InternalServerError };
             }
         }
     }

test/PerformanceTests/Benchmarks/CollisionSearch/FlatParallelSearch.cs

@@ -13,7 +13,7 @@ namespace PerformanceTests.CollisionSearch
     using System.Linq;
 
     /// <summary>
-    /// An orchestration that searches for hash collisions using a recursive divide-and-conquer algorithm.
+    /// An orchestration that searches for hash collisions using the simple fan-out-fan-in pattern.
     /// </summary>
     public static class FlatParallelSearch
     {

test/PerformanceTests/Benchmarks/CollisionSearch/HttpTriggers.cs

@@ -13,6 +13,7 @@ namespace PerformanceTests.CollisionSearch
     using Microsoft.Azure.WebJobs.Extensions.DurableTask;
     using System.Net.Http;
     using Newtonsoft.Json.Linq;
+    using System.Net;
 
     public static class HttpTriggers
     {
@@ -79,7 +80,7 @@ namespace PerformanceTests.CollisionSearch
             }
             catch (Exception e)
             {
-                return new ObjectResult(new { error = e.ToString() });
+                return new ObjectResult(new { error = e.ToString() }) { StatusCode = (int)HttpStatusCode.InternalServerError };
             }
         }
     }

test/PerformanceTests/Benchmarks/Counter/Counter.cs

@@ -24,25 +24,36 @@ namespace PerformanceTests.Orchestrations.Counter
 
     public class Counter
     {
-        [JsonProperty("value")]
         public int CurrentValue { get; set; }
 
-        [JsonProperty("modified")]
+        public DateTime? StartTime { get; set; }
+
         public DateTime LastModified { get; set; }
 
         public void Add(int amount)
         {
             this.CurrentValue += amount;
-            this.LastModified = DateTime.UtcNow;
+            this.UpdateTimestamps();
         }
 
-        public void Reset()
+        void UpdateTimestamps()
         {
-            this.CurrentValue = 0;
+            if (!this.StartTime.HasValue)
+            {
+                this.StartTime = DateTime.UtcNow;
+            }
             this.LastModified = DateTime.UtcNow;
         }
 
-        public (int, DateTime) Get() => (this.CurrentValue, DateTime.UtcNow);
+        public void Crash(DateTime timeStamp)
+        {
+            // crash if less that 4 seconds have passed since the signal was sent
+            // (so that we no longer crash when retrying after recovery)
+            if ((DateTime.UtcNow - timeStamp) < TimeSpan.FromSeconds(4))
+            {
+                System.Environment.Exit(333);
+            }
+        }
 
         [FunctionName(nameof(Counter))]
         public static Task Run([EntityTrigger] IDurableEntityContext ctx)

test/PerformanceTests/Benchmarks/Counter/HttpTriggers.cs

@@ -7,6 +7,7 @@ namespace PerformanceTests.Orchestrations.Counter
     using System.Diagnostics;
     using System.IO;
     using System.Linq;
+    using System.Net;
     using System.Threading;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Http;
@@ -18,191 +19,128 @@ namespace PerformanceTests.Orchestrations.Counter
 
     public static class HttpTriggers
     {
-        class Input
-        {
-            public string Key { get; set; }
-            public int Expected { get; set; }
-        }
-
-        [FunctionName(nameof(WaitForCount))]
-        public static async Task<IActionResult> WaitForCount(
-            [HttpTrigger(AuthorizationLevel.Function, methods: "post", Route = nameof(WaitForCount))] HttpRequest req,
-            [DurableClient] IDurableClient client)
-        {
-            string requestBody = await new StreamReader(req.Body).ReadToEndAsync();
-            var input = JsonConvert.DeserializeObject<Input>(requestBody);
-            var entityId = new EntityId("Counter", input.Key);
-            Stopwatch stopwatch = new Stopwatch();
-            stopwatch.Start();
-
-            // poll the entity until the expected count is reached
-            while (stopwatch.Elapsed < TimeSpan.FromMinutes(5))
-            {
-                var response = await client.ReadEntityStateAsync<Counter>(entityId);
-
-                if (response.EntityExists
-                    && response.EntityState.CurrentValue >= input.Expected)
-                {
-                    return new OkObjectResult($"{JsonConvert.SerializeObject(response.EntityState)}\n");
-                }
-
-                await Task.Delay(TimeSpan.FromSeconds(2));
-            }
-
-            return new OkObjectResult("timed out.\n");
-        }
-
-        [FunctionName(nameof(Increment))]
-        public static async Task<IActionResult> Increment(
-            [HttpTrigger(AuthorizationLevel.Anonymous, "post", Route = nameof(Increment))] HttpRequest req,
+        [FunctionName(nameof(Add))]
+        public static async Task<IActionResult> Add(
+            [HttpTrigger(AuthorizationLevel.Anonymous, "post", Route = "counter/{key}/add")] HttpRequest req,
+            string key,
             [DurableClient] IDurableClient client)
         {
             try
             {
-                string entityKey = await new StreamReader(req.Body).ReadToEndAsync();
-                var entityId = new EntityId("Counter", entityKey);
-                await client.SignalEntityAsync(entityId, "add", 1);
-                return new OkObjectResult($"increment was sent to {entityId}.\n");
+                string input = await new StreamReader(req.Body).ReadToEndAsync();
+                int amount = int.Parse(input);
+                var entityId = new EntityId("Counter", key);
+                await client.SignalEntityAsync(entityId, "add", amount);
+                return new OkObjectResult($"add({amount}) was sent to {entityId}.\n");
             }
             catch (Exception e)
             {
-                return new OkObjectResult(e.ToString());
+                return new ObjectResult(e.ToString()) { StatusCode = (int)HttpStatusCode.InternalServerError };
+            }
+        }
+
+        [FunctionName(nameof(ReadCounter))]
+        public static async Task<IActionResult> ReadCounter(
+            [HttpTrigger(AuthorizationLevel.Anonymous, "get", Route = "counter/{key}")] HttpRequest req,
+            string key,
+            [DurableClient] IDurableClient client)
+        {
+            try
+            {
+                var entityId = new EntityId("Counter", key);
+                var response = await client.ReadEntityStateAsync<Counter>(entityId);
+
+                if (!response.EntityExists)
+                {
+                    return new NotFoundObjectResult($"no such entity: {entityId}");
+                }
+                else
+                {
+                    return new OkObjectResult(response.EntityState);
+                }
+            }
+            catch (Exception e)
+            {
+                return new ObjectResult(e.ToString()) { StatusCode = (int)HttpStatusCode.InternalServerError };
+            }
+        }
+
+        [FunctionName(nameof(DeleteCounter))]
+        public static async Task<IActionResult> DeleteCounter(
+            [HttpTrigger(AuthorizationLevel.Anonymous, "delete", Route = "counter/{key}")] HttpRequest req,
+            string key,
+            [DurableClient] IDurableClient client)
+        {
+            try
+            {
+                var entityId = new EntityId("Counter", key);
+                await client.SignalEntityAsync(entityId, "delete");
+                return new OkObjectResult($"delete was sent to {entityId}.\n");
+            }
+            catch (Exception e)
+            {
+                return new ObjectResult(e.ToString()) { StatusCode = (int)HttpStatusCode.InternalServerError };
+            }
+        }
+
+        [FunctionName(nameof(CrashCounter))]
+        public static async Task<IActionResult> CrashCounter(
+            [HttpTrigger(AuthorizationLevel.Anonymous, "post", Route = "counter/{key}/crash")] HttpRequest req,
+            string key,
+            [DurableClient] IDurableClient client)
+        {
+            try
+            {
+                var entityId = new EntityId("Counter", key);
+                await client.SignalEntityAsync(entityId, "crash", DateTime.UtcNow);
+                return new OkObjectResult($"crash was sent to {entityId}.\n");
+            }
+            catch (Exception e)
+            {
+                return new ObjectResult(e.ToString()) { StatusCode = (int)HttpStatusCode.InternalServerError };
             }
         }
 
         [FunctionName(nameof(CountSignals))]
         public static async Task<IActionResult> CountSignals(
-            [HttpTrigger(AuthorizationLevel.Anonymous, "post", Route = nameof(CountSignals))] HttpRequest req,
-            [DurableClient] IDurableClient client)
+             [HttpTrigger(AuthorizationLevel.Anonymous, "get", Route = "signal-counter/{count}")] HttpRequest req,
+             int count,
+             [DurableClient] IDurableClient client)
         {
             try
             {
-                int numberSignals = int.Parse(await new StreamReader(req.Body).ReadToEndAsync());
-                var entityId = new EntityId("Counter", Guid.NewGuid().ToString("N"));
+                string key = Guid.NewGuid().ToString("N");
+                var entityId = new EntityId("Counter", key);
 
                 DateTime startTime = DateTime.UtcNow;
 
-                // send the specified number of signals to the entity
-                await SendIncrementSignals(client, numberSignals, 50, (i) => entityId);
+                // send the specified number of signals to the counter entity
+                // for better send throughput we do not send signals one at a time, but use parallel tasks
+                await Enumerable.Range(0, count).ParallelForEachAsync(50, true, i => client.SignalEntityAsync(entityId, "add", 1));
 
                 // poll the entity until the expected count is reached
-                while ((DateTime.UtcNow - startTime) < TimeSpan.FromMinutes(5))
+                while ((DateTime.UtcNow - startTime) < TimeSpan.FromMinutes(3))
                 {
                     var response = await client.ReadEntityStateAsync<Counter>(entityId);
 
                     if (response.EntityExists
-                        && response.EntityState.CurrentValue == numberSignals)
+                        && response.EntityState.CurrentValue == count)
                     {
-                        return new OkObjectResult($"received {numberSignals} signals in {(response.EntityState.LastModified - startTime).TotalSeconds:F1}s.\n");
+                        var state = response.EntityState;
+                        var elapsedSeconds = (state.LastModified - state.StartTime.Value).TotalSeconds;
+                        var throughput = count / elapsedSeconds;
+                        return new OkObjectResult(new { elapsedSeconds, count, throughput });
                     }
 
-                    await Task.Delay(TimeSpan.FromSeconds(2));
+                    await Task.Delay(TimeSpan.FromSeconds(5));
                 }
 
-                return new OkObjectResult($"timed out after {(DateTime.UtcNow - startTime)}.\n");
+                return new OkObjectResult($"timed out after {(DateTime.UtcNow - startTime)}.\n") { StatusCode = (int)HttpStatusCode.RequestTimeout };
             }
             catch (Exception e)
             {
-                return new OkObjectResult(e.ToString());
-            }
-        }
-
-        [FunctionName(nameof(CountParallelSignals))]
-        public static async Task<IActionResult> CountParallelSignals(
-            [HttpTrigger(AuthorizationLevel.Anonymous, "post", Route = nameof(CountParallelSignals))] HttpRequest req,
-            [DurableClient] IDurableClient client)
-        {
-            try
-            {
-                // input is of the form "nnn,mmm"
-                // nnn - number of signals to send
-                // mmm - number of entities to distribute the signals over
-
-                string input = await new StreamReader(req.Body).ReadToEndAsync();
-                int commaPosition = input.IndexOf(',');
-                int numberSignals = int.Parse(input.Substring(0, commaPosition));
-                int numberEntities = int.Parse(input.Substring(commaPosition + 1));
-                var entityPrefix = Guid.NewGuid().ToString("N");
-                EntityId MakeEntityId(int i) => new EntityId("Counter", $"{entityPrefix}-!{i:D6}");
-                DateTime startTime = DateTime.UtcNow;
-
-                if (numberSignals % numberEntities != 0)
-                {
-                    throw new ArgumentException("numberSignals must be a multiple of numberEntities");
-                }
-
-                // send the specified number of signals to the entity
-                await SendIncrementSignals(client, numberSignals, 50, (i) => MakeEntityId(i % numberEntities));
-
-                // poll the entities until the expected count is reached
-                async Task<double?> WaitForCount(int i)
-                {
-                    var random = new Random();
-
-                    while ((DateTime.UtcNow - startTime) < TimeSpan.FromMinutes(5))
-                    {
-                        var response = await client.ReadEntityStateAsync<Counter>(MakeEntityId(i));
-
-                        if (response.EntityExists
-                            && response.EntityState.CurrentValue == numberSignals / numberEntities)
-                        {
-                            return (response.EntityState.LastModified - startTime).TotalSeconds;
-                        }
-
-                        await Task.Delay(TimeSpan.FromSeconds(2 + random.NextDouble()));
-                    }
-
-                    return null;
-                };
-
-                var waitTasks = Enumerable.Range(0, numberEntities).Select(i => WaitForCount(i)).ToList();
-
-                await Task.WhenAll(waitTasks);
-
-                var results = waitTasks.Select(t => t.Result);
-
-                if (results.Any(result => result == null))
-                {
-                    return new OkObjectResult($"timed out after {(DateTime.UtcNow - startTime)}.\n");
-                }
-
-                return new OkObjectResult($"received {numberSignals} signals on {numberEntities} entities in {results.Max():F1}s.\n");
-            }
-            catch (Exception e)
-            {
-                return new OkObjectResult(e.ToString());
-            }
-        }
-
-        static async Task SendIncrementSignals(IDurableClient client, int numberSignals, int maxConcurrency, Func<int, EntityId> entityIdFactory)
-        {
-            // send the specified number of signals to the entity
-            // for better throughput we do this in parallel
-
-            using var semaphore = new SemaphoreSlim(maxConcurrency);
-
-            for (int i = 0; i < numberSignals; i++)
-            {
-                var entityId = entityIdFactory(i);
-                await semaphore.WaitAsync();
-                var task = Task.Run(async () =>
-                {
-                    try
-                    {
-                        await client.SignalEntityAsync(entityId, "add", 1);
-                    }
-                    finally
-                    {
-                        semaphore.Release();
-                    }
-                });
-            }
-
-            // wait for tasks to complete
-            for (int i = 0; i < maxConcurrency; i++)
-            {
-                await semaphore.WaitAsync();
+                return new ObjectResult(e.ToString()) { StatusCode = (int)HttpStatusCode.InternalServerError };
             }
         }
     }
-}
+}

test/PerformanceTests/Benchmarks/EventHubs/DestinationEntity.cs

@@ -0,0 +1,63 @@
+// Copyright (c) Microsoft Corporation.
+// Licensed under the MIT License.
+
+namespace PerformanceTests.EventHubs
+{
+    using System;
+    using System.Collections.Concurrent;
+    using System.Collections.Generic;
+    using System.IO;
+    using System.Threading.Tasks;
+    using Microsoft.Azure.WebJobs;
+    using Microsoft.Azure.WebJobs.Extensions.DurableTask;
+    using Microsoft.Extensions.Logging;
+    using Newtonsoft.Json;
+
+    [JsonObject(MemberSerialization.OptIn)]
+    public class DestinationEntity
+    {
+        public static EntityId GetEntityId(int number) => new EntityId(nameof(DestinationEntity), $"!{number}");
+
+        [JsonProperty]
+        public int EventCount { get; set; }
+
+        [JsonProperty]
+        public DateTime? LastUpdated { get; set; }
+
+
+        ILogger logger;
+
+        public DestinationEntity(ILogger logger)
+        {
+            this.logger = logger;
+        }
+
+        public ILogger Logger { set { this.logger = value; } }
+
+        public void Delete()
+        {
+            Entity.Current.DeleteState();
+        }
+
+        public void Receive((Event evt, int receiverPartition) input)
+        {
+            this.EventCount++;
+
+            if (this.logger.IsEnabled(LogLevel.Debug))
+            {
+                this.logger.LogInformation("{entityId} Received signal #{eventCount}", Entity.Current.EntityId, this.EventCount);
+            }
+
+            this.LastUpdated = DateTime.UtcNow;
+
+            // send an ack to the receiver entity
+            Entity.Current.SignalEntity(PullerEntity.GetEntityId(input.receiverPartition), nameof(PullerEntity.Ack));
+        }
+
+        [FunctionName(nameof(DestinationEntity))]
+        public static Task Run([EntityTrigger] IDurableEntityContext context, ILogger logger)
+        {
+            return context.DispatchAsync<DestinationEntity>(logger);
+        }
+    }
+}

test/PerformanceTests/Benchmarks/EventHubs/DestinationOrchestration.cs

@@ -0,0 +1,36 @@
+// Copyright (c) Microsoft Corporation.
+// Licensed under the MIT License.
+
+namespace PerformanceTests.EventHubs
+{
+    using System;
+    using System.Collections.Concurrent;
+    using System.Collections.Generic;
+    using System.IO;
+    using System.Threading.Tasks;
+    using Microsoft.Azure.WebJobs;
+    using Microsoft.Azure.WebJobs.Extensions.DurableTask;
+    using Microsoft.Extensions.Logging;
+    using Newtonsoft.Json;
+
+    public static class DestinationOrchestration
+    {
+        [FunctionName(nameof(DestinationOrchestration))]
+        public static async Task RunOrchestrator(
+            [OrchestrationTrigger] IDurableOrchestrationContext context,
+            ILogger logger)
+        {
+            var input = context.GetInput<(Event evt, int receiverPartition)> ();
+
+            logger.LogInformation("Started orchestration {instanceId}", context.InstanceId);
+
+            // execute an activity with the event payload as the input
+            await context.CallActivityAsync<string>(nameof(Activities.SayHello), input.evt.Payload);   
+
+            logger.LogInformation("Completed orchestration {instanceId}", context.InstanceId);
+
+            // when this orchestration completes, we notify the puller entity
+            context.SignalEntity(PullerEntity.GetEntityId(input.receiverPartition), nameof(PullerEntity.Ack));
+        }
+    }
+}

test/PerformanceTests/Benchmarks/EventHubs/Event.cs

@@ -5,21 +5,33 @@ namespace PerformanceTests.EventHubs
 {
     using System;
     using System.Collections.Generic;
+    using System.IO;
     using System.Text;
     using Newtonsoft.Json;
 
-    [JsonObject(MemberSerialization.OptOut)]
     public struct Event
     {
-        public int Partition { get; set; }
+        public int Destination { get; set; }
+    
+        public string Payload { get; set; }
 
-        public long SeqNo { get; set; }
-
-        public byte[] Payload { get; set; }
-
-        public override string ToString()
+        public static Event FromStream(Stream s)
         {
-            return $"Event {this.Partition}.{this.SeqNo} size={this.Payload.Length}";
+            var r = new BinaryReader(s);
+            return new Event
+            {
+                Destination = r.ReadInt32(),
+                Payload = r.ReadString(),
+            };
+        }
+
+        public byte[] ToBytes()
+        {
+            var m = new MemoryStream();
+            var r = new BinaryWriter(m);
+            r.Write(this.Destination);
+            r.Write(this.Payload);
+            return m.ToArray();
         }
     }
 }

test/PerformanceTests/Benchmarks/EventHubs/EventHubTrigger.cs

@@ -1,68 +0,0 @@
-// Copyright (c) Microsoft Corporation.
-// Licensed under the MIT License.
-
-namespace PerformanceTests.EventHubs
-{
-    using System;
-    using System.Collections.Generic;
-    using System.IO;
-    using System.Threading.Tasks;
-    using Microsoft.Azure.EventHubs;
-    using Microsoft.Azure.WebJobs;
-    using Microsoft.Azure.WebJobs.Extensions.DurableTask;
-    using Microsoft.Extensions.Logging;
-
-    public static class EventHubTrigger
-    {
-        // must set this manually, and comment out the [Disable], to test the trigger
-        const int numEntities = 1000;
-
-        [Disable]
-        [FunctionName("MyEventHubTrigger")]
-        public static async Task RunAsync(
-            [EventHubTrigger(Parameters.EventHubName, Connection = "EventHubsConnection")] EventData[] eventDataSet,
-            [DurableClient] IDurableClient client,
-            ILogger log)
-        {
-            int numTries = 0;
-
-            while (numTries < 10)
-            {
-                numTries++;
-
-                try
-                {
-                    var signalTasks = new List<Task>();
-
-                    // send one signal for each packet
-                    for (int i = 0; i < eventDataSet.Length; i++)
-                    {
-                        var eventData = eventDataSet[i];
-                        var sp = eventData.SystemProperties;
-                        byte[] payload = eventData.Body.ToArray();
-                        var evt = new Event()
-                        {
-                            Partition = payload[0],
-                            SeqNo = eventData.SystemProperties.SequenceNumber,
-                            Payload = payload
-                        };
-                        log.LogDebug($"Sending signal for {evt}");
-                        signalTasks.Add(client.SignalEntityAsync(Parameters.GetDestinationEntity(evt, numEntities), nameof(ReceiverEntity.Receive), evt));
-                    }
-
-                    log.LogInformation($"Sent {eventDataSet.Length} signals");
-
-                    await Task.WhenAll(signalTasks);
-
-                    break;
-                }
-                catch (NullReferenceException)
-                {
-                    // during startup we may get these exceptions if the trigger goes off before the
-                    // Orchestration service has been started
-                    await Task.Delay(TimeSpan.FromSeconds(1));
-                }
-            }
-        }
-    }
-}

test/PerformanceTests/Benchmarks/EventHubs/HttpTriggers/Channels.cs

@@ -0,0 +1,82 @@
+// Copyright (c) Microsoft Corporation.
+// Licensed under the MIT License.
+
+namespace PerformanceTests.EventHubs
+{
+    using System;
+    using System.IO;
+    using System.Threading.Tasks;
+    using Microsoft.AspNetCore.Mvc;
+    using Microsoft.Azure.WebJobs;
+    using Microsoft.Azure.WebJobs.Extensions.Http;
+    using Microsoft.AspNetCore.Http;
+    using Microsoft.Azure.WebJobs.Extensions.DurableTask;
+    using Azure.Messaging.EventHubs.Consumer;
+    using Azure.Messaging.EventHubs.Producer;
+    using System.Collections.Generic;
+    using System.Linq;
+    using Microsoft.Extensions.Logging;
+    using System.Net;
+
+    public static class Channels
+    {
+        [FunctionName("EH_" + nameof(Channels))]
+        public static async Task<IActionResult> Run(
+           [HttpTrigger(AuthorizationLevel.Anonymous, "post", Route = "eh/channels/{action}")] HttpRequest req,
+           [DurableClient] IDurableClient client,
+           string action,
+           ILogger log)
+        {
+            try
+            {
+                string requestBody = await new StreamReader(req.Body).ReadToEndAsync();
+                int numEventHubs = int.Parse(requestBody);
+
+                if (numEventHubs < 1 || numEventHubs > Parameters.MaxEventHubs)
+                {
+                    return new ObjectResult("invalid number of event hubs.\n") { StatusCode = (int)HttpStatusCode.BadRequest };
+                }
+
+                switch (action)
+                {             
+                    case "create":
+
+                        log.LogWarning("Creating {numEventHubs} EventHubs...", numEventHubs);
+                        int numCreated = 0;
+                        await Enumerable.Range(0, numEventHubs).ParallelForEachAsync(200, false, async (index) =>
+                        {
+                            if (await EventHubsUtil.EnsureEventHubExistsAsync(Parameters.EventHubConnectionString, Parameters.EventHubName(index), Parameters.MaxPartitionsPerEventHub))
+                            {
+                                numCreated++;
+                            }
+                        });
+                        return new OkObjectResult($"Created {numCreated} EventHubs.\n");
+
+                    case "delete":
+
+                        log.LogWarning("Deleting {numEventHubs} EventHubs...", numEventHubs);
+                        int numDeleted = 0;
+                        await Enumerable.Range(0, numEventHubs).ParallelForEachAsync(200, false, async (index) =>
+                        {
+                            if (await EventHubsUtil.DeleteEventHubIfExistsAsync(Parameters.EventHubConnectionString, Parameters.EventHubName(index)))
+                            {
+                                numDeleted++;
+                            }
+                        });
+
+                        return new OkObjectResult($"Deleted {numDeleted} EventHubs.\n");
+
+                    default:
+                        return new ObjectResult($"Unknown action: {action}\n")
+                        {
+                            StatusCode = (int)System.Net.HttpStatusCode.NotFound
+                        };
+                }
+            }
+            catch (Exception e)
+            {
+                return new ObjectResult(new { error = e.ToString() }) { StatusCode = (int)HttpStatusCode.InternalServerError };
+            }
+        }
+    }
+}

test/PerformanceTests/Benchmarks/EventHubs/HttpTriggers/Clear.cs

@@ -1,58 +0,0 @@
-// Copyright (c) Microsoft Corporation.
-// Licensed under the MIT License.
-
-namespace PerformanceTests.EventHubs
-{
-    using System;
-    using System.IO;
-    using System.Threading.Tasks;
-    using Microsoft.AspNetCore.Mvc;
-    using Microsoft.Azure.WebJobs;
-    using Microsoft.Azure.WebJobs.Extensions.Http;
-    using Microsoft.AspNetCore.Http;
-    using Microsoft.Azure.WebJobs.Extensions.DurableTask;
-    using Azure.Messaging.EventHubs.Consumer;
-    using Azure.Messaging.EventHubs.Producer;
-    using System.Collections.Generic;
-    using System.Linq;
-    using Microsoft.Extensions.Logging;
-
-    public static class Clear
-    {
-        [FunctionName("EH_" + nameof(Clear))]
-        public static async Task<IActionResult> Run(
-           [HttpTrigger(AuthorizationLevel.Anonymous, "post", Route = "eh/" + nameof(Clear))] HttpRequest req,
-           [DurableClient] IDurableClient client,
-           ILogger log)
-        {
-            try 
-            {
-                string requestBody = await new StreamReader(req.Body).ReadToEndAsync();
-                int numEntities = int.Parse(requestBody);
-
-                log.LogWarning($"Deleting {numEntities + 32} entities...");
-                await Enumerable.Range(0, numEntities + 32).ParallelForEachAsync(200, true, async (index) =>
-                {
-                    if (index <= numEntities)
-                    {
-                        var entityId = ReceiverEntity.GetEntityId(index);
-                        await client.SignalEntityAsync(entityId, "delete");
-                    }
-                    else
-                    {
-                        int partition = index - numEntities;
-                        await client.SignalEntityAsync(PartitionReceiverEntity.GetEntityId(Parameters.EventHubName, partition.ToString()), "delete");
-                    }
-                });
-                
-                return new OkObjectResult($"Deleted {numEntities + 32} entities.\n");
-            }
-            catch (Exception e)
-            {
-                return new ObjectResult(new { 
-                    error = e.ToString()
-                });
-            }
-        }
-    }
-}

test/PerformanceTests/Benchmarks/EventHubs/HttpTriggers/Consume.cs

@@ -1,59 +0,0 @@
-// Copyright (c) Microsoft Corporation.
-// Licensed under the MIT License.
-
-namespace PerformanceTests.EventHubs
-{
-    using System;
-    using System.IO;
-    using System.Threading.Tasks;
-    using Microsoft.AspNetCore.Mvc;
-    using Microsoft.Azure.WebJobs;
-    using Microsoft.Azure.WebJobs.Extensions.Http;
-    using Microsoft.AspNetCore.Http;
-    using Microsoft.Azure.WebJobs.Extensions.DurableTask;
-    using Azure.Messaging.EventHubs.Consumer;
-    using Azure.Messaging.EventHubs.Producer;
-    using System.Collections.Generic;
-
-    public static class Consume
-    {
-        [FunctionName("EH_" + nameof(Consume))]
-        public static async Task<IActionResult> Run(
-           [HttpTrigger(AuthorizationLevel.Anonymous, "post", Route = "eh/" + nameof(Consume))] HttpRequest req,
-           [DurableClient] IDurableClient client)
-        {
-            try 
-            {
-                string requestBody = await new StreamReader(req.Body).ReadToEndAsync();
-                int numEntities = int.Parse(requestBody);
-
-                var connectionString = Environment.GetEnvironmentVariable("EventHubsConnection");
-                var eventHubName = Parameters.EventHubName;
-                var producer = new EventHubProducerClient(connectionString, eventHubName);
-                var partitionIds = await producer.GetPartitionIdsAsync();
-
-                List<Task> signalTasks = new List<Task>();
-                foreach (var partitionId in partitionIds)
-                {
-                    var partitionProperties = await producer.GetPartitionPropertiesAsync(partitionId);
-                    var startParameters = new PartitionReceiverEntity.StartParameters()
-                    {
-                        NumEntities = numEntities,
-                        PartitionId = partitionId,
-                        NextSequenceNumberToReceive = 0,
-                    };
-                    signalTasks.Add(client.SignalEntityAsync(PartitionReceiverEntity.GetEntityId(eventHubName, partitionId), nameof(PartitionReceiverEntity.Start), startParameters));
-                }
-                await Task.WhenAll(signalTasks);
-
-                return new OkObjectResult($"Started PartitionReceiverEntities for {signalTasks.Count} partitions.\n");
-            }
-            catch (Exception e)
-            {
-                return new ObjectResult(new { 
-                    error = e.ToString()
-                });
-            }
-        }
-    }
-}

test/PerformanceTests/Benchmarks/EventHubs/HttpTriggers/Consumers.cs

@@ -0,0 +1,147 @@
+// Copyright (c) Microsoft Corporation.
+// Licensed under the MIT License.
+
+namespace PerformanceTests.EventHubs
+{
+    using System;
+    using System.IO;
+    using System.Threading.Tasks;
+    using Microsoft.AspNetCore.Mvc;
+    using Microsoft.Azure.WebJobs;
+    using Microsoft.Azure.WebJobs.Extensions.Http;
+    using Microsoft.AspNetCore.Http;
+    using Microsoft.Azure.WebJobs.Extensions.DurableTask;
+    using Azure.Messaging.EventHubs.Consumer;
+    using Azure.Messaging.EventHubs.Producer;
+    using System.Collections.Generic;
+    using System.Linq;
+    using System.Net;
+    using Microsoft.Extensions.Logging;
+    using Newtonsoft.Json;
+
+    public static class Consumers
+    {
+        [FunctionName("EH_" + nameof(Consumers))]
+        public static async Task<IActionResult> Run(
+           [HttpTrigger(AuthorizationLevel.Anonymous, "post", Route = "eh/consumers/{action}")] HttpRequest req,
+           [DurableClient] IDurableClient client,
+           string action,
+           ILogger log)
+        {
+            try
+            {
+                string requestBody = await new StreamReader(req.Body).ReadToEndAsync();
+                int numPullers = int.Parse(requestBody);
+
+                if (numPullers < 1 || numPullers > Parameters.MaxPartitions)
+                {
+                    return new ObjectResult("invalid number of consumers.\n") { StatusCode = (int)HttpStatusCode.BadRequest };
+                }
+
+                switch (action)
+                {
+                    case "query":
+
+                        object lockForUpdate = new object();
+
+                        int delivered = 0;
+                        long pulled = 0;
+                        int pending = 0;
+                        int active = 0;
+                        DateTime? firstReceived = null;
+                        DateTime? lastUpdated = null;
+                        int errors = 0;
+
+                        log.LogWarning($"Checking the status of {numPullers} puller entities...");                    
+                        await Enumerable.Range(0, numPullers).ParallelForEachAsync(500, true, async (partition) =>
+                        {
+                            var entityId = PullerEntity.GetEntityId(partition);
+                            var response = await client.ReadEntityStateAsync<PullerEntity>(entityId);
+                            if (response.EntityExists)
+                            {
+                                lock (lockForUpdate)
+                                {
+                                    pulled += response.EntityState.TotalEventsPulled;
+                                    pending += response.EntityState.NumPending;
+                                    active += response.EntityState.IsActive ? 1 : 0;
+                                    errors += response.EntityState.Errors;
+
+                                    if (!firstReceived.HasValue || response.EntityState.FirstReceived < firstReceived)
+                                    {
+                                        firstReceived = response.EntityState.FirstReceived;
+                                    }
+                                }
+                            }
+                        });
+
+                        log.LogWarning($"Checking the status of {Parameters.NumberDestinationEntities} destination entities...");                    
+                        await Enumerable.Range(0, Parameters.NumberDestinationEntities).ParallelForEachAsync(500, true, async (destination) =>
+                        {
+                            var entityId = DestinationEntity.GetEntityId(destination);
+                            var response = await client.ReadEntityStateAsync<DestinationEntity>(entityId);
+                            if (response.EntityExists)
+                            {
+                                lock (lockForUpdate)
+                                {
+                                    delivered += response.EntityState.EventCount;
+
+                                    if (!lastUpdated.HasValue || response.EntityState.LastUpdated > lastUpdated)
+                                    {
+                                        lastUpdated = response.EntityState.LastUpdated;
+                                    }
+                                }
+                            }
+                        });
+
+                        TimeSpan? duration = lastUpdated - firstReceived;
+
+                        var resultObject = new
+                        {
+                            pending,
+                            active,
+                            delivered,
+                            pulled,
+                            errors,
+                            firstReceived,
+                            lastUpdated,
+                            duration
+                        };
+
+                        return new OkObjectResult($"{JsonConvert.SerializeObject(resultObject)}\n");
+
+                    case "start":
+                    case "stop":
+
+                        await Enumerable.Range(0, numPullers).ParallelForEachAsync(200, true, async (number) =>
+                        {
+                            var entityId = PullerEntity.GetEntityId(number);
+                            await client.SignalEntityAsync(entityId, action);
+                        });
+
+                        return new OkObjectResult($"Sent {action} signal to {numPullers} puller entities.\n");
+
+
+                    case "delete":
+
+                        await Enumerable.Range(0, numPullers + Parameters.NumberDestinationEntities).ParallelForEachAsync(500, true, async (i) =>
+                        {
+                            var entityId = i < numPullers ? PullerEntity.GetEntityId(i) : DestinationEntity.GetEntityId(i - numPullers);
+                            await client.SignalEntityAsync(entityId, action);
+                        });
+
+                        return new OkObjectResult($"Sent delete signal to {numPullers} puller entities and {Parameters.NumberDestinationEntities} destination entities.\n");
+
+                    default:
+                        return new ObjectResult($"Unknown action: {action}\n")
+                        {
+                            StatusCode = (int)System.Net.HttpStatusCode.NotFound
+                        };
+                }
+            }
+            catch (Exception e)
+            {
+                return new ObjectResult(new { error = e.ToString() }) { StatusCode = (int)HttpStatusCode.InternalServerError };
+            }
+        }
+    }
+}

test/PerformanceTests/Benchmarks/EventHubs/HttpTriggers/Count.cs

@@ -1,89 +0,0 @@
-// Copyright (c) Microsoft Corporation.
-// Licensed under the MIT License.
-
-namespace PerformanceTests.EventHubs
-{
-    using System;
-    using System.IO;
-    using System.Threading.Tasks;
-    using Microsoft.AspNetCore.Mvc;
-    using Microsoft.Azure.WebJobs;
-    using Microsoft.Azure.WebJobs.Extensions.Http;
-    using Microsoft.AspNetCore.Http;
-    using Microsoft.Azure.WebJobs.Extensions.DurableTask;
-    using Azure.Messaging.EventHubs.Consumer;
-    using Azure.Messaging.EventHubs.Producer;
-    using System.Collections.Generic;
-    using Microsoft.Extensions.Logging;
-    using System.Linq;
-    using Newtonsoft.Json;
-
-    public static class Count
-    {
-        [FunctionName("EH_" + nameof(Count))]
-        public static async Task<IActionResult> Run(
-           [HttpTrigger(AuthorizationLevel.Anonymous, "post", Route = "eh/" + nameof(Count))] HttpRequest req,
-           [DurableClient] IDurableClient client,
-           ILogger log)
-        {
-            try
-            {
-                string requestBody = await new StreamReader(req.Body).ReadToEndAsync();
-                int numEntities = int.Parse(requestBody);
-
-                int numEvents = 0;
-                long earliestStart = long.MaxValue;
-                long latestUpdate = 0;
-                long bytesReceived = 0;
-                bool gotTimeRange = false;
-
-                object lockForUpdate = new object();
-
-                var tasks = new List<Task<bool>>();
-
-                log.LogWarning($"Checking the status of {numEntities} entities...");
-                await Enumerable.Range(0, numEntities).ParallelForEachAsync(200, true, async (index) =>
-                {
-                    var entityId = ReceiverEntity.GetEntityId(index);
-                    var response = await client.ReadEntityStateAsync<ReceiverEntity>(entityId);
-                    if (response.EntityExists)
-                    {
-                        lock (lockForUpdate)
-                        {
-                            numEvents += response.EntityState.EventCount;
-                            bytesReceived += response.EntityState.BytesReceived;
-                            earliestStart = Math.Min(earliestStart, response.EntityState.StartTime.Ticks);
-                            latestUpdate = Math.Max(latestUpdate, response.EntityState.LastTime.Ticks);
-                            gotTimeRange = true;
-                        }
-                    }
-                });
-
-                double elapsedSeconds = 0;
-
-                if (gotTimeRange)
-                {
-                    elapsedSeconds = (new DateTime(latestUpdate) - new DateTime(earliestStart)).TotalSeconds;
-                }
-
-                string volume = $"{1.0 * bytesReceived / (1024 * 1024):F2}MB";
-
-                log.LogWarning($"Received a total of {numEvents} ({volume}) on {numEntities} entities in {elapsedSeconds:F2}s.");
-
-                var resultObject = new
-                {
-                    numEvents,
-                    bytesReceived,
-                    volume,
-                    elapsedSeconds,
-                };
-
-                return new OkObjectResult($"{JsonConvert.SerializeObject(resultObject)}\n");
-            }
-            catch (Exception e)
-            {
-                return new ObjectResult(new { error = e.ToString() });
-            }
-        }
-    }
-}

test/PerformanceTests/Benchmarks/EventHubs/HttpTriggers/Produce.cs

@@ -1,115 +0,0 @@
-// Copyright (c) Microsoft Corporation.
-// Licensed under the MIT License.
-
-namespace PerformanceTests.EventProducer
-{
-    using System;
-    using System.Collections.Generic;
-    using System.Threading.Tasks;
-    using Microsoft.Azure.EventHubs;
-    using EventHubs;
-    using Microsoft.AspNetCore.Mvc;
-    using Microsoft.AspNetCore.Routing;
-    using Microsoft.Azure.WebJobs;
-    using Microsoft.AspNetCore.Http;
-    using Microsoft.Extensions.Logging;
-    using Microsoft.Azure.WebJobs.Extensions.DurableTask;
-    using Microsoft.Azure.WebJobs.Extensions.Http;
-    using Newtonsoft.Json;
-    using System.Linq;
-    using System.Diagnostics;
-    using System.IO;
-
-    public static class Produce
-    {
-        // Populates the event hubs with events. This should be called prior to consuming the events.
-        //
-        // for example, to distribute 1000 events of 1k each over 12 partitions, call
-        //      curl http://localhost:7071/eh/produce -d 1000x1024/12
-
-        [FunctionName("EH_" + nameof(Produce))]
-        public static async Task<IActionResult> Run(
-           [HttpTrigger(AuthorizationLevel.Anonymous, "post", Route = "eh/" + nameof(Produce))] HttpRequest req,
-           [DurableClient] IDurableClient client,
-           ILogger log)
-        {
-            try
-            {
-                string requestBody = await new StreamReader(req.Body).ReadToEndAsync();
-                int xpos = requestBody.IndexOf('x');
-                int spos = requestBody.IndexOf('/');
-                int numEvents = int.Parse(requestBody.Substring(0, xpos));
-                int payloadSize = int.Parse(requestBody.Substring(xpos + 1, spos - (xpos + 1)));
-                int numPartitions = int.Parse(requestBody.Substring(spos + 1));
-                int producerBatchSize = 500 * 1024 / payloadSize;
-                string volume = $"{1.0 * payloadSize * numEvents / (1024 * 1024):F2}MB";
-
-                string connectionString = Environment.GetEnvironmentVariable(Parameters.EventHubsConnectionName);
-                await EventHubsUtil.EnsureEventHubExistsAsync(connectionString, Parameters.EventHubName, numPartitions);
-                var connectionStringBuilder = new EventHubsConnectionStringBuilder(connectionString)
-                {
-                    EntityPath = Parameters.EventHubName,
-                };
-                var ehc = EventHubClient.CreateFromConnectionString(connectionStringBuilder.ToString());
-                var ehInfo = await ehc.GetRuntimeInformationAsync();
-
-                if (ehInfo.PartitionCount != numPartitions)
-                {
-                    throw new ArgumentException("Wrong number of partitions");
-                }
-
-                async Task SendEventsAsync(int offset, int events, string partitionId)
-                {
-                    var partitionSender = ehc.CreatePartitionSender(partitionId);
-                    var eventBatch = new List<EventData>(100);
-                    for (int x = 0; x < events; x++)
-                    {
-                        byte[] payload = new byte[payloadSize];
-                        (new Random()).NextBytes(payload);
-                        payload[0] = byte.Parse(partitionId);
-                        var e = new EventData(payload);
-                        eventBatch.Add(e);
-
-                        if (x % producerBatchSize == (producerBatchSize - 1))
-                        {
-                            await partitionSender.SendAsync(eventBatch);
-                            log.LogWarning($"Sent {x + 1} events to partition {partitionId}");
-                            eventBatch = new List<EventData>(100);
-                        }
-                    }
-                    if (eventBatch.Count > 0)
-                    {
-                        await partitionSender.SendAsync(eventBatch);
-                        log.LogWarning($"Sent {events} events to partition {partitionId}");
-                    }
-                }
-
-                log.LogWarning($"Sending {numEvents} EventHub events ({volume}) to {numPartitions} partitions");
-                var partitionTasks = new List<Task>();
-                var remaining = numEvents;
-                var stopwatch = new Stopwatch();
-                stopwatch.Start();
-
-                for (int i = numPartitions; i >= 1; i--)
-                {
-                    var portion = remaining / i;
-                    remaining -= portion;
-                    partitionTasks.Add(SendEventsAsync(remaining, portion, ehInfo.PartitionIds[i - 1]));
-                }
-
-                await Task.WhenAll(partitionTasks);
-
-                double elapsedSeconds = stopwatch.Elapsed.TotalSeconds;
-
-                log.LogWarning($"Sent all {numEvents} EventHub events ({volume}) to {numPartitions} partitions in {elapsedSeconds}");
-
-                var resultObject = new { numEvents, volume, numPartitions, elapsedSeconds };
-                return new OkObjectResult($"{JsonConvert.SerializeObject(resultObject)}\n");
-            }
-            catch (Exception e)
-            {
-                return new ObjectResult(new { error = e.ToString() });
-            }
-        }
-    }
-}

test/PerformanceTests/Benchmarks/EventHubs/HttpTriggers/Producers.cs

@@ -0,0 +1,116 @@
+// Copyright (c) Microsoft Corporation.
+// Licensed under the MIT License.
+
+namespace PerformanceTests.EventProducer
+{
+    using System;
+    using System.Collections.Generic;
+    using System.Threading.Tasks;
+    using Microsoft.Azure.EventHubs;
+    using EventHubs;
+    using Microsoft.AspNetCore.Mvc;
+    using Microsoft.AspNetCore.Routing;
+    using Microsoft.Azure.WebJobs;
+    using Microsoft.AspNetCore.Http;
+    using Microsoft.Extensions.Logging;
+    using Microsoft.Azure.WebJobs.Extensions.DurableTask;
+    using Microsoft.Azure.WebJobs.Extensions.Http;
+    using Newtonsoft.Json;
+    using System.Linq;
+    using System.Diagnostics;
+    using System.IO;
+    using System.Net;
+
+    public static class Producers
+    {
+        [FunctionName("EH_" + nameof(Producers))]
+        public static async Task<IActionResult> Run(
+           [HttpTrigger(AuthorizationLevel.Anonymous, "post", Route = "eh/producers/{action}")] HttpRequest req,
+           [DurableClient] IDurableClient client,
+           string action,
+           ILogger log)
+        {
+            try
+            {
+                string requestBody = await new StreamReader(req.Body).ReadToEndAsync();
+                int numProducers = int.Parse(requestBody);
+
+                switch (action)
+                {
+                    case "query":
+
+                        object lockForUpdate = new object();
+
+                        long sent = 0;
+                        long exceptions = 0;
+                        int active = 0;
+                        DateTime? Starttime = null;
+                        DateTime? LastUpdate = null;
+
+                        log.LogWarning("Checking the status of {NumProducers} producer entities...", numProducers);
+                        await Enumerable.Range(0, numProducers).ParallelForEachAsync(500, true, async (partition) =>
+                        {
+                            var entityId = ProducerEntity.GetEntityId(partition);
+                            var response = await client.ReadEntityStateAsync<ProducerEntity>(entityId);
+                            if (response.EntityExists)
+                            {
+                                lock (lockForUpdate)
+                                {
+                                    sent += response.EntityState.SentEvents;
+                                    exceptions += response.EntityState.Exceptions;
+                                    active += response.EntityState.IsActive ? 1 : 0;
+
+                                    if (!Starttime.HasValue || response.EntityState.Starttime < Starttime)
+                                    {
+                                        Starttime = response.EntityState.Starttime;
+                                    }
+                                    if (!LastUpdate.HasValue || response.EntityState.LastUpdate > LastUpdate)
+                                    {
+                                        LastUpdate = response.EntityState.LastUpdate;
+                                    }
+                                }
+                            }
+                        });
+
+                        double? throughput = null;
+                        if (Starttime.HasValue && LastUpdate.HasValue)
+                        {
+                            throughput = 1.0 * sent / (LastUpdate.Value - Starttime.Value).TotalSeconds;
+                        }
+
+                        var resultObject = new
+                        {
+                            sent,
+                            exceptions,
+                            active,
+                            throughput,
+                        };
+
+                        return new OkObjectResult($"{JsonConvert.SerializeObject(resultObject)}\n");
+
+                    case "start":
+                    case "stop":
+                    case "delete":
+
+                        await Enumerable.Range(0, numProducers).ParallelForEachAsync(500, true, async (number) =>
+                        {
+                            var entityId = ProducerEntity.GetEntityId(number);
+                            await client.SignalEntityAsync(entityId, action);
+                        });
+
+                        return new OkObjectResult($"sent {action} signal to {numProducers} producer entities\n");
+
+                    default:
+                        return new ObjectResult($"Unknown action: {action}\n")
+                        {
+                            StatusCode = (int)System.Net.HttpStatusCode.NotFound
+                        };
+                }
+            }
+            catch (Exception e)
+            {
+                return new ObjectResult(new { error = e.ToString() }) { StatusCode = (int)HttpStatusCode.InternalServerError };
+            }
+        }
+    }
+}

test/PerformanceTests/Benchmarks/EventHubs/Parameters.cs

@@ -6,25 +6,44 @@ namespace PerformanceTests.EventHubs
     using System;
     using System.Collections.Generic;
     using System.Text;
-    using Microsoft.Azure.WebJobs.Extensions.DurableTask;
-    using Newtonsoft.Json;
+    using Microsoft.Identity.Client;
 
-    [JsonObject(MemberSerialization.OptOut)]
     public static class Parameters
     {
-        /// <summary>
-        /// The name of the event hubs connection
-        /// </summary>
-        public const string EventHubsConnectionName = "EventHubsConnection";
+        // the name of the environment variable containing the event hubs connection string for the event hub
+        // that we are pushing events to and pulling events from
+        public const string EventHubsEnvVar = "EHNamespace";
 
-        /// <summary>
-        /// The name of the Event Hub that connects the consumer and producer
-        /// </summary>
-        public const string EventHubName = "eventstest";
+        // EventHubs dimensions
+        public const int MaxEventHubs = 10;
+        public const int MaxPartitionsPerEventHub = 32;
+        public const int MaxPartitions = MaxEventHubs * MaxPartitionsPerEventHub;
+        public const int MaxPullers = MaxEventHubs * MaxPartitionsPerEventHub; // max 1 puller per partition
 
-        /// <summary>
-        /// Routing function (determines target entity for an event) 
-        /// </summary>
-        public static EntityId GetDestinationEntity(Event evt, int numberEntities) => ReceiverEntity.GetEntityId(Math.Abs((evt.Partition, evt.SeqNo).GetHashCode()) % numberEntities);
+        // Event content
+        public const int PayloadStringLength = 5;
+
+        // Limit on the number of pending signals and orchestrations
+        // Serves as flow control to avoid pulling more from event hub than what can be processed
+        public const int PendingLimit = 3000;
+
+        // Forwarding of events to entities
+        public static bool SendEntitySignalForEachEvent = true;
+        public const int NumberDestinationEntities = 100;
+
+        // Starting of orchestrations for events
+        public static bool StartOrchestrationForEachEvent = false;
+        public static bool PlaceOrchestrationInstance = true;
+
+        public static string EventHubConnectionString => Environment.GetEnvironmentVariable(EventHubsEnvVar);
+
+        public static string EventHubName(int index) => $"hub{index}";
+
+        // assignment of puller entities to eventhubs partitions
+        public static string EventHubNameForPuller(int number) => EventHubName(number / MaxPartitionsPerEventHub);
+        public static string EventHubPartitionIdForPuller(int number) => (number % MaxPartitionsPerEventHub).ToString();
+
+        // assignment of producer entities to eventhubs
+        public static string EventHubNameForProducer(int number) => EventHubName((number / MaxPartitionsPerEventHub) % MaxEventHubs);
     }
 }

test/PerformanceTests/Benchmarks/EventHubs/PartitionReceiverEntity.cs

@@ -1,228 +0,0 @@
-// Copyright (c) Microsoft Corporation.
-// Licensed under the MIT License.
-
-namespace PerformanceTests.EventHubs
-{
-    using System;
-    using System.Collections.Concurrent;
-    using System.Collections.Generic;
-    using System.IO;
-    using System.Linq;
-    using System.Threading;
-    using System.Threading.Tasks;
-    using Azure.Messaging.EventHubs;
-    using Azure.Messaging.EventHubs.Consumer;
-    using Azure.Messaging.EventHubs.Primitives;
-    using Azure.Messaging.EventHubs.Producer;
-    using Microsoft.Azure.WebJobs;
-    using Microsoft.Azure.WebJobs.Extensions.DurableTask;
-    using Microsoft.Extensions.Logging;
-    using Newtonsoft.Json;
-
-    [JsonObject(MemberSerialization.OptIn)]
-    public class PartitionReceiverEntity
-    {
-        public static EntityId GetEntityId(string EventHubName, string partitionId)
-        {
-            return new EntityId(nameof(PartitionReceiverEntity), $"{EventHubName}!{int.Parse(partitionId):D2}");
-        }
-
-        [JsonProperty]
-        int NumEntities { get; set; }
-
-        [JsonProperty]
-        string PartitionId { get; set; }
-
-        [JsonProperty]
-        long Position { get; set; }
-
-        [JsonProperty]
-        double BackoffSeconds { get; set; }
-
-        [JsonProperty]
-        TimeSpan? IdleInterval { get; set; }
-
-        [JsonProperty]
-        Guid InstanceGuid { get; set; }
-
-        ILogger logger;
-
-        readonly static ConcurrentDictionary<Guid, PartitionReceiver> cache = new ConcurrentDictionary<Guid, PartitionReceiver>();
-
-        public PartitionReceiverEntity(ILogger logger)
-        {
-            this.logger = logger;
-        }
-
-        public ILogger Logger { set { this.logger = value; } }
-
-        [JsonObject(MemberSerialization.OptOut)]
-        public struct StartParameters
-        {
-            public int NumEntities { get; set; }
-
-            public string PartitionId { get; set; }
-
-            public long NextSequenceNumberToReceive { get; set; }
-
-            public TimeSpan? IdleInterval { get; set; }
-        }
-
-        void ProcessEvent(EventData eventData)
-        {
-            byte[] payload = eventData.EventBody.ToArray();
-            var evt = new Event()
-            {
-                Partition = payload[0],
-                SeqNo = eventData.SequenceNumber,
-                Payload = payload
-            };
-            this.logger.LogDebug($"Sending signal for {evt}");
-            Entity.Current.SignalEntity(Parameters.GetDestinationEntity(evt, this.NumEntities), nameof(ReceiverEntity.Receive), evt);
-        }
-
-        public async Task Start(StartParameters parameters)
-        {
-            // close any receivers that may already exist because of a previous run
-            if (cache.TryRemove(this.InstanceGuid, out var receiver))
-            {
-                await receiver.CloseAsync();
-            }
-
-            this.NumEntities = parameters.NumEntities;
-            this.PartitionId = parameters.PartitionId;
-            this.Position = parameters.NextSequenceNumberToReceive - 1;
-            this.IdleInterval = parameters.IdleInterval;
-            this.InstanceGuid = Guid.NewGuid();
-
-            await this.Continue(this.InstanceGuid);
-        }
-
-        public async Task Delete()
-        {
-            if (cache.TryRemove(this.InstanceGuid, out var receiver))
-            {
-                await receiver.CloseAsync();
-            }
-            Entity.Current.DeleteState();
-        }
-
-        public async Task Continue(Guid instanceGuid)
-        {
-            try
-            {
-                if (this.InstanceGuid != instanceGuid)
-                {
-                    // the signal is from an instance that was deleted or overwritten. Ignore it.
-                    return;
-                }
-
-                this.logger.LogInformation($"{Entity.Current.EntityKey} Continuing after {this.Position}");
-
-                PartitionReceiver receiver = cache.GetOrAdd(this.InstanceGuid, (partitionId) =>
-                {
-                    this.logger.LogDebug($"{Entity.Current.EntityKey} Creating PartitionReceiver");
-
-                    return new PartitionReceiver(
-                    EventHubConsumerClient.DefaultConsumerGroupName,
-                    this.PartitionId,
-                    EventPosition.FromSequenceNumber(this.Position, false),
-                    Environment.GetEnvironmentVariable("EventHubsConnection"),
-                    Parameters.EventHubName);
-                });
-
-                int batchSize = 100;
-                TimeSpan waitTime = TimeSpan.FromSeconds(1);
-                long? lastReceivedSequenceNumber = null;
-
-                this.logger.LogDebug($"{Entity.Current.EntityKey} Receiving events after {this.Position}...");
-                var eventBatch = await receiver.ReceiveBatchAsync(batchSize, waitTime);
-                this.logger.LogDebug($"{Entity.Current.EntityKey} ...response received.");
-
-                foreach (EventData eventData in eventBatch)
-                {
-                    try
-                    {
-                        this.ProcessEvent(eventData);
-                    }
-                    catch (Exception e)
-                    {
-                        this.logger.LogError($"{Entity.Current.EntityKey} Failed to process event {eventData.SequenceNumber}: {e}");
-                    }
-                    lastReceivedSequenceNumber = eventData.SequenceNumber;
-                }
-
-
-                if (lastReceivedSequenceNumber.HasValue)
-                {
-                    this.logger.LogInformation($"Processed {lastReceivedSequenceNumber.Value - this.Position} signals");
-                    this.Position = lastReceivedSequenceNumber.Value;
-                    this.ScheduleContinuation(0);
-                }
-                else if (this.BackoffSeconds == 0)
-                {
-                    this.ScheduleContinuation(1);
-                }
-                else if (this.BackoffSeconds < 10)
-                {
-                    this.ScheduleContinuation(this.BackoffSeconds * 3);
-                }
-                else
-                {
-                    cache.TryRemove(this.InstanceGuid, out _);
-                    await receiver.CloseAsync();
-
-                    if (this.IdleInterval.HasValue)
-                    {
-                        this.logger.LogInformation($"{Entity.Current.EntityKey} Going on standby for {this.IdleInterval.Value}");
-                        this.ScheduleContinuation(this.IdleInterval.Value.TotalSeconds);
-                    }
-                    else
-                    {
-                        this.logger.LogInformation($"{Entity.Current.EntityKey} is done");
-                        Entity.Current.DeleteState();
-                        return;
-                    }
-                } 
-            }
-            catch (Exception e) // TODO catch
-            {
-                this.logger.LogError($"{Entity.Current.EntityKey} failed: {e}");
-                if (this.IdleInterval.HasValue)
-                {
-                    this.ScheduleContinuation(this.IdleInterval.Value.TotalSeconds);
-                }
-            }
-        }
-
-        void ScheduleContinuation(double BackoffSeconds)
-        {
-            if (BackoffSeconds == 0)
-            {
-                this.logger.LogDebug($"{Entity.Current.EntityKey} Scheduling continuation immediately");
-                Entity.Current.SignalEntity(
-                    Entity.Current.EntityId,
-                    nameof(Continue),
-                    this.InstanceGuid);
-            }
-            else
-            {
-                var targetTime = DateTime.UtcNow + TimeSpan.FromSeconds(BackoffSeconds);
-                this.logger.LogDebug($"{Entity.Current.EntityKey} Scheduling continuation delayed by {BackoffSeconds}s");
-                Entity.Current.SignalEntity(
-                    Entity.Current.EntityId,
-                    targetTime,
-                    nameof(Continue),
-                    this.InstanceGuid);
-            }
-            this.BackoffSeconds = BackoffSeconds;
-        }
-
-        [FunctionName(nameof(PartitionReceiverEntity))]
-        public static Task Run([EntityTrigger] IDurableEntityContext context, ILogger logger)
-        {
-            return context.DispatchAsync<PartitionReceiverEntity>(logger);   
-        }
-    }
-}
- 

test/PerformanceTests/Benchmarks/EventHubs/ProducerEntity.cs

@@ -0,0 +1,145 @@
+// Copyright (c) Microsoft Corporation.
+// Licensed under the MIT License.
+
+namespace PerformanceTests.EventHubs
+{
+    using System;
+    using System.Collections.Concurrent;
+    using System.Collections.Generic;
+    using System.Diagnostics;
+    using System.IO;
+    using System.Linq;
+    using System.Text;
+    using System.Threading;
+    using System.Threading.Tasks;
+    using Azure.Messaging.EventHubs;
+    using Azure.Messaging.EventHubs.Producer;
+    using Microsoft.Azure.Documents.SystemFunctions;
+    using Microsoft.Azure.WebJobs;
+    using Microsoft.Azure.WebJobs.Extensions.DurableTask;
+    using Microsoft.Extensions.Logging;
+    using Newtonsoft.Json;
+
+    [JsonObject(MemberSerialization.OptIn)]
+    public class ProducerEntity
+    {
+        public static EntityId GetEntityId(int number)
+        {
+            return new EntityId(nameof(ProducerEntity), $"!{number}");
+        }
+
+        [JsonProperty]
+        public bool IsActive { get; set; }
+
+        [JsonProperty]
+        public long SentEvents { get; set; }
+
+        [JsonProperty]
+        public int Exceptions { get; set; }
+
+        [JsonProperty]
+        public DateTime? Starttime { get; set; }
+
+        [JsonProperty]
+        public DateTime? LastUpdate { get; set; }
+
+        readonly ILogger logger;
+
+        public ProducerEntity(ILogger logger)
+        {
+            this.logger = logger;
+        }
+
+        public Task Start()
+        {
+            this.IsActive = true;
+            this.Starttime = DateTime.UtcNow;
+            return this.ProduceMore();
+        }
+
+        public void Stop()
+        {
+            this.IsActive = false;
+        }
+
+        public void Delete()
+        {
+            Entity.Current.DeleteState();
+        }
+
+        public string CreateRandomPayload(Random random, int length)
+        {
+            if (length == 0)
+            {
+                return string.Empty;
+            }
+            var sb = new StringBuilder();
+            for (int i = 0; i < length; i++)
+            {
+                sb.Append(Convert.ToChar(random.Next(0, 26) + 65));
+            }
+            return sb.ToString();
+        }
+
+        async Task ProduceMore()
+        {
+            if (!this.IsActive)
+            {
+                return;
+            }
+
+            var sw = new Stopwatch();
+            sw.Start();
+
+            int myNumber = int.Parse(Entity.Current.EntityId.EntityKey.Substring(1));
+
+            Random random = new Random(myNumber);
+
+            await using (var producer = new EventHubProducerClient(Parameters.EventHubConnectionString, Parameters.EventHubNameForProducer(myNumber)))
+            {
+                var r = new Random();
+
+                while (sw.Elapsed < TimeSpan.FromSeconds(3))
+                {
+                    try
+                    {
+                        using EventDataBatch eventBatch = await producer.CreateBatchAsync();
+                        using MemoryStream stream = new MemoryStream();
+                        int batchsize = 100;
+                        for (int i = 0; i < batchsize; i++)
+                        {
+                            var evt = new Event()
+                            {
+                                Destination = r.Next(Parameters.NumberDestinationEntities),
+                                Payload = this.CreateRandomPayload(random, Parameters.PayloadStringLength),
+                            };
+                            eventBatch.TryAdd(new EventData(evt.ToBytes()));
+                        }
+
+                        int numberEventsInBatch = eventBatch.Count;
+                        await producer.SendAsync(eventBatch);
+                        this.SentEvents += numberEventsInBatch;
+                    }
+
+                    catch (Exception e)
+                    {
+                        this.Exceptions++;
+                        this.logger.LogError("{entityId} Failed to send events: {exception}", Entity.Current.EntityId, e);
+                    }
+                }
+
+                this.LastUpdate = DateTime.UtcNow;
+
+                // schedule a continuation to send more
+                Entity.Current.SignalEntity(Entity.Current.EntityId, nameof(ProduceMore));
+            }
+        }
+
+        [FunctionName(nameof(ProducerEntity))]
+        public static Task Run([EntityTrigger] IDurableEntityContext context, ILogger logger)
+        {
+            return context.DispatchAsync<ProducerEntity>(logger);   
+        }
+    }
+}
+ 

test/PerformanceTests/Benchmarks/EventHubs/PullerEntity.cs

@@ -0,0 +1,225 @@
+// Copyright (c) Microsoft Corporation.
+// Licensed under the MIT License.
+
+namespace PerformanceTests.EventHubs
+{
+    using System;
+    using System.Collections.Concurrent;
+    using System.Collections.Generic;
+    using System.IO;
+    using System.Linq;
+    using System.Threading;
+    using System.Threading.Tasks;
+    using Azure.Messaging.EventHubs;
+    using Azure.Messaging.EventHubs.Consumer;
+    using Azure.Messaging.EventHubs.Primitives;
+    using Azure.Messaging.EventHubs.Producer;
+    using Microsoft.Azure.WebJobs;
+    using Microsoft.Azure.WebJobs.Extensions.DurableTask;
+    using Microsoft.Extensions.Logging;
+    using Newtonsoft.Json;
+
+    [JsonObject(MemberSerialization.OptIn)]
+    public class PullerEntity
+    {
+        public static EntityId GetEntityId(int number)
+        {
+            return new EntityId(nameof(PullerEntity), $"!{number}");
+        }
+
+        readonly ILogger logger;
+
+        public PullerEntity(ILogger logger)
+        {
+            this.logger = logger;      
+        }
+
+        // EventHub partition receivers are heavyweight; we use a cache so we can reuse them between entity invocations
+        readonly static ConcurrentDictionary<int, PartitionReceiver> cache = new ConcurrentDictionary<int, PartitionReceiver>();
+
+
+        [JsonProperty]
+        public bool IsActive { get; set; }
+
+        [JsonProperty]
+        public long ReceivePosition { get; set; }
+
+        [JsonProperty]
+        public int NumPending { get; set; }
+
+        [JsonProperty]
+        public DateTime? FirstReceived { get; set; }
+
+        [JsonProperty]
+        public int Errors { get; set; }
+
+        [JsonProperty]
+        public long TotalEventsPulled { get; set; }
+
+
+        public async Task Start()
+        {
+            this.IsActive = true;   
+            await this.PullMore();
+        }
+
+        public async Task Stop()
+        {
+            int number = int.Parse(Entity.Current.EntityId.EntityKey.Substring(1));
+
+            try
+            {
+                if (cache.TryRemove(number, out var partitionReceiver))
+                {
+                    await partitionReceiver.DisposeAsync();
+                }
+            }
+            catch(Exception e)
+            {
+                this.logger.LogWarning("{entityId} failed to dispose PartitionReceiver: {exception}", Entity.Current.EntityId, e);
+            }
+
+            this.IsActive = false;
+        }
+
+        public async Task Delete()
+        {
+            await this.Stop();
+            Entity.Current.DeleteState();
+        }
+        
+        public Task Ack()
+        {
+            this.NumPending--;
+
+            return this.PullMore();
+        }
+
+        public async Task PullMore()
+        {
+            if (!this.IsActive)
+            {
+                return; // we are not currently active
+            }
+
+            if (Entity.Current.BatchPosition < Entity.Current.BatchSize - 1)
+            {
+                return; // we have more operations in this batch to process, so do those first
+            }
+
+            if (this.NumPending >= Parameters.PendingLimit)
+            {
+                return; // do not continue until we get more acks
+            }
+ 
+            try
+            {
+                int myNumber = int.Parse(Entity.Current.EntityId.EntityKey.Substring(1));
+                string myEntityId = Entity.Current.EntityId.ToString();
+
+                PartitionReceiver receiver = cache.GetOrAdd(myNumber, (partitionId) =>
+                {
+                    this.logger.LogDebug("{entityId} Creating PartitionReceiver at position {receivePosition}", myEntityId, this.ReceivePosition);
+                    return new PartitionReceiver(
+                        EventHubConsumerClient.DefaultConsumerGroupName,
+                        Parameters.EventHubPartitionIdForPuller(myNumber),
+                        EventPosition.FromSequenceNumber(this.ReceivePosition - 1, false),
+                        Parameters.EventHubConnectionString,
+                        Parameters.EventHubNameForPuller(myNumber));
+                });
+
+                int batchSize = 1000;
+                TimeSpan waitTime = TimeSpan.FromSeconds(3);
+
+                this.logger.LogDebug("{entityId} Receiving events from position {receivePosition}", myEntityId, this.ReceivePosition);
+                var eventBatch = await receiver.ReceiveBatchAsync(batchSize, waitTime);
+                DateTime timestamp = DateTime.UtcNow;
+                int numEventsInBatch = 0;
+
+                foreach (EventData eventData in eventBatch)
+                {
+                    numEventsInBatch++;
+
+                    if (eventData.SequenceNumber != this.ReceivePosition)
+                    {
+                        // for sanity, check that we received the next event in the sequence. 
+                        // this can fail if events were discarded internally by the EventHub.
+                        this.logger.LogError("{entityId} Received wrong event, sequence number expected={expected} actual={actual}", myEntityId, this.ReceivePosition, eventData.SequenceNumber);
+                        this.Errors++;
+                    }
+                    
+                    if (Parameters.SendEntitySignalForEachEvent || Parameters.StartOrchestrationForEachEvent)
+                    {
+                        try
+                        {
+                            // parse the event data
+                            var e = Event.FromStream(eventData.EventBody.ToStream());
+
+                            if (Parameters.SendEntitySignalForEachEvent)
+                            {
+                                EntityId destinationEntityId = DestinationEntity.GetEntityId(e.Destination);
+                                this.logger.LogDebug("{entityId} Sending signal to {destinationEntityId}", myEntityId, destinationEntityId);
+                                Entity.Current.SignalEntity(destinationEntityId, nameof(DestinationEntity.Receive), (e, myNumber));
+                                this.NumPending++;
+                            }
+
+                            if (Parameters.StartOrchestrationForEachEvent)
+                            {
+                                var instanceId = this.GetRandomOrchestrationInstanceId(myNumber);
+                                this.logger.LogDebug("{entityId} Scheduling orchestration {instanceId}", myEntityId, instanceId);
+                                Entity.Current.StartNewOrchestration(nameof(DestinationOrchestration), (e, myNumber), instanceId);
+                                this.NumPending++;
+                            }
+                        }
+                        catch (Exception e)
+                        {
+                            this.logger.LogError("{entityId} Failed to process event {sequenceNumber}: {e}", myEntityId, eventData.SequenceNumber, e);
+                        }
+                    }
+
+                    this.TotalEventsPulled++;
+                    this.ReceivePosition = eventData.SequenceNumber + 1;
+                }
+
+                this.logger.LogDebug("{entityId} Processed batch of {numEventsInBatch} events", myEntityId, numEventsInBatch);
+
+                if (!this.FirstReceived.HasValue && this.TotalEventsPulled > 0)
+                {
+                    this.FirstReceived = timestamp;
+                }
+
+                // if we have not reached the limit of pending deliveries yet, continue
+                if (this.NumPending < Parameters.PendingLimit)
+                {
+                    this.logger.LogDebug("{entityId} Scheduling continuation for position {receivePosition}", myEntityId, this.ReceivePosition);
+                    Entity.Current.SignalEntity(Entity.Current.EntityId, nameof(PullMore));
+                }
+            }
+            catch (Exception e)
+            {
+                this.logger.LogError("{entityId} failed: {exception}", Entity.Current.EntityId, e);
+                this.Errors++;
+                this.IsActive = false;
+            }
+        }
+
+        string GetRandomOrchestrationInstanceId(int myNumber)
+        {
+            if (Parameters.PlaceOrchestrationInstance)
+            {
+                return $"{Guid.NewGuid():n}!{myNumber}";
+            }
+            else
+            {
+                return $"{Guid.NewGuid():n}";
+            }
+        }
+
+        [FunctionName(nameof(PullerEntity))]
+        public static Task Run([EntityTrigger] IDurableEntityContext context, ILogger logger)
+        {
+            return context.DispatchAsync<PullerEntity>(logger);   
+        }
+    }
+}
+ 

test/PerformanceTests/Benchmarks/EventHubs/ReceiverEntity.cs

@@ -1,66 +0,0 @@
-// Copyright (c) Microsoft Corporation.
-// Licensed under the MIT License.
-
-namespace PerformanceTests.EventHubs
-{
-    using System;
-    using System.Collections.Concurrent;
-    using System.Collections.Generic;
-    using System.IO;
-    using System.Threading.Tasks;
-    using Microsoft.Azure.WebJobs;
-    using Microsoft.Azure.WebJobs.Extensions.DurableTask;
-    using Microsoft.Extensions.Logging;
-    using Newtonsoft.Json;
-
-    [JsonObject(MemberSerialization.OptIn)]
-    public class ReceiverEntity
-    {
-        public static EntityId GetEntityId(int index) => new EntityId(nameof(ReceiverEntity), index.ToString());
-
-        [JsonProperty]
-        public int EventCount { get; set; }
-
-        [JsonProperty]
-        public DateTime StartTime { get; set; }
-
-        [JsonProperty]
-        public DateTime LastTime { get; set; }
-
-        [JsonProperty]
-        public long BytesReceived { get; set; }
-
-        ILogger logger;
-
-        public ReceiverEntity(ILogger logger)
-        {
-            this.logger = logger;
-        }
-
-        public ILogger Logger { set { this.logger = value; } }
-
-        public void Receive(Event evt)
-        {
-            this.LastTime = DateTime.UtcNow;
-
-            if (this.EventCount++ == 0)
-            {
-                this.StartTime = this.LastTime;
-            }
-
-            this.BytesReceived += evt.Payload.Length;
-           
-            if (this.logger.IsEnabled(LogLevel.Information))
-            {
-                this.logger.LogInformation($"{Entity.Current.EntityId} Received event #{this.EventCount}: {evt}");
-            }
-        }
-
-        [FunctionName(nameof(ReceiverEntity))]
-        public static Task Run([EntityTrigger] IDurableEntityContext context, ILogger logger)
-        {
-            return context.DispatchAsync<ReceiverEntity>(logger);
-        }
-    }
-}
- 

test/PerformanceTests/Benchmarks/FanOutFanIn/FanOutFanInOrchestration.cs

@@ -30,7 +30,7 @@ namespace PerformanceTests.FanOutFanIn
             Task[] tasks = new Task[count];
             for (int i = 0; i < tasks.Length; i++)
             {
-                tasks[i] = context.CallActivityAsync<string>("SayHello", i.ToString("00000"));
+                tasks[i] = context.CallActivityAsync<string>("SayHello", i.ToString());
             }
             await Task.WhenAll(tasks);
 

test/PerformanceTests/Benchmarks/FanOutFanIn/HttpTriggers.cs

@@ -17,6 +17,9 @@ namespace PerformanceTests.FanOutFanIn
     using System.Linq;
     using System.Collections.Concurrent;
     using System.Threading;
+    using Newtonsoft.Json.Linq;
+    using System.Net.Http;
+    using System.Net;
 
     /// <summary>
     /// A simple microbenchmark orchestration that executes activities in parallel.
@@ -25,18 +28,35 @@ namespace PerformanceTests.FanOutFanIn
     {
         [FunctionName(nameof(FanOutFanIn))]
         public static async Task<IActionResult> RunFanOutFanIn(
-           [HttpTrigger(AuthorizationLevel.Anonymous, "post", Route = "fanoutfanin")] HttpRequest req,
+           [HttpTrigger(AuthorizationLevel.Anonymous, "get", Route = "fanoutfanin/{count}")] HttpRequest req,
+           int count,
            [DurableClient] IDurableClient client)
         {
-            // get the number of tasks
-            string requestBody = await new StreamReader(req.Body).ReadToEndAsync();
-            int count = int.Parse(requestBody);
+            try
+            {
+                // start the orchestration
+                string orchestrationInstanceId = await client.StartNewAsync(nameof(FanOutFanInOrchestration), null, count);
 
-            // start the orchestration
-            string orchestrationInstanceId = await client.StartNewAsync(nameof(FanOutFanInOrchestration), null, count);
+                // wait for it to complete and return the result
+                var response = await client.WaitForCompletionOrCreateCheckStatusResponseAsync(req, orchestrationInstanceId, TimeSpan.FromSeconds(600));
 
-            // wait for it to complete and return the result
-            return await client.WaitForCompletionOrCreateCheckStatusResponseAsync(req, orchestrationInstanceId, TimeSpan.FromSeconds(200));
+                if (response is ObjectResult objectResult
+                    && objectResult.Value is HttpResponseMessage responseMessage
+                    && responseMessage.StatusCode == System.Net.HttpStatusCode.OK
+                    && responseMessage.Content is StringContent stringContent)
+                {
+                    var state = await client.GetStatusAsync(orchestrationInstanceId, false, false, false);
+                    var elapsedSeconds = (state.LastUpdatedTime - state.CreatedTime).TotalSeconds;
+                    var throughput = count / elapsedSeconds;
+                    response = new OkObjectResult(new { elapsedSeconds, count, throughput });
+                }
+
+                return response;
+            }
+            catch (Exception e)
+            {
+                return new ObjectResult(new { error = e.ToString() }) { StatusCode = (int)HttpStatusCode.InternalServerError };
+            }
         }
     }
 }

test/PerformanceTests/Benchmarks/FileHash/HttpTriggers.cs

@@ -14,6 +14,7 @@ namespace PerformanceTests.FileHash
     using Microsoft.Extensions.Logging;
     using System.Net.Http;
     using Newtonsoft.Json.Linq;
+    using System.Net;
 
     public static class HttpTriggers
     {
@@ -59,7 +60,7 @@ namespace PerformanceTests.FileHash
             }
             catch (Exception e)
             {
-                return new ObjectResult(new { error = e.ToString() });
+                return new ObjectResult(new { error = e.ToString() }) { StatusCode = (int) HttpStatusCode.InternalServerError };
             }
         }
     }

test/PerformanceTests/Benchmarks/HelloCities/HelloSequence.cs

@@ -17,6 +17,7 @@ namespace PerformanceTests.HelloCities
     using System.Linq;
     using System.Collections.Concurrent;
     using System.Threading;
+    using System.Text;
 
     /// <summary>
     /// A simple microbenchmark orchestration that executes several simple "hello" activities in a sequence.
@@ -50,5 +51,21 @@ namespace PerformanceTests.HelloCities
 
             return outputs;
         }
+
+        [FunctionName(nameof(HelloSequenceN))]
+        public static async Task HelloSequenceN([OrchestrationTrigger] IDurableOrchestrationContext context)
+        {
+            int numberSteps = context.GetInput<int>();
+            for (int i = 0; i < numberSteps; i++)
+            {
+                await context.CallActivityAsync<string>(nameof(Activities.SayHello), $"City{i}");
+            }
+        }
+
+        [FunctionName(nameof(HelloSequence3Nested))]
+        public static async Task<List<string>> HelloSequence3Nested([OrchestrationTrigger] IDurableOrchestrationContext context)
+        {
+            return await context.CallSubOrchestratorAsync<List<string>>(nameof(HelloSequence3), null);
+        }
     }
 }

test/PerformanceTests/Benchmarks/HelloCities/HttpTriggers.cs

@@ -17,6 +17,8 @@ namespace PerformanceTests.HelloCities
     using System.Linq;
     using System.Collections.Concurrent;
     using System.Threading;
+    using Newtonsoft.Json.Linq;
+    using System.Net.Http;
 
     /// <summary>
     /// A simple microbenchmark orchestration that some trivial activities in a sequence.
@@ -48,5 +50,50 @@ namespace PerformanceTests.HelloCities
             // wait for it to complete and return the result
             return await client.WaitForCompletionOrCreateCheckStatusResponseAsync(req, orchestrationInstanceId, TimeSpan.FromSeconds(200));
         }
+
+        [FunctionName(nameof(HelloCitiesN))]
+        public static async Task<IActionResult> HelloCitiesN(
+          [HttpTrigger(AuthorizationLevel.Anonymous, "get", Route = "hellocities/{count}")] HttpRequest req,
+          [DurableClient] IDurableClient client,
+          int count,
+          ILogger log)
+        {
+            // start the orchestration
+            string orchestrationInstanceId = await client.StartNewAsync(nameof(HelloSequence.HelloSequenceN), null, count);
+
+            // wait for it to complete and return the result
+            var response = await client.WaitForCompletionOrCreateCheckStatusResponseAsync(req, orchestrationInstanceId, TimeSpan.FromSeconds(500));
+
+            if (response is ObjectResult objectResult
+                && objectResult.Value is HttpResponseMessage responseMessage
+                && responseMessage.StatusCode == System.Net.HttpStatusCode.OK
+                && responseMessage.Content is StringContent stringContent)
+            {
+                var state = await client.GetStatusAsync(orchestrationInstanceId, false, false, false);
+                var elapsedSeconds = (state.LastUpdatedTime - state.CreatedTime).TotalSeconds;
+                var throughput = count / elapsedSeconds;
+                response = new OkObjectResult(new { elapsedSeconds, count, throughput });
+            }
+
+            return response;
+        }
+
+        [FunctionName(nameof(HelloCities3Nested))]
+        public static async Task<IActionResult> HelloCities3Nested(
+           [HttpTrigger(AuthorizationLevel.Anonymous, "get")] HttpRequest req,
+           [DurableClient] IDurableClient client,
+           ILogger log)
+        {
+            // start the orchestration
+            string orchestrationInstanceId = await client.StartNewAsync(nameof(HelloSequence.HelloSequence3Nested));
+
+            // wait for it to complete  
+            await client.WaitForCompletionOrCreateCheckStatusResponseAsync(req, orchestrationInstanceId, TimeSpan.FromSeconds(200));
+
+            DurableOrchestrationStatus status = await client.GetStatusAsync(orchestrationInstanceId, true, true, true);
+
+            // return the history
+            return new OkObjectResult(status.History);
+        }
     }
-}
+}

test/PerformanceTests/host.json

@@ -29,9 +29,12 @@
       "DurableTask.Netherite.Client": "Warning",
       "DurableTask.Netherite.LoadMonitor": "Warning"
     },
+
     "applicationInsights": {
-      "sampling": {
-        "isEnabled": false
+      "samplingSettings": {
+        "isEnabled": true,
+        "maxTelemetryItemsPerSecond": 1,
+        "excludedTypes": "Exception"
       }
     }
   },

test/PerformanceTests/scripts/deploy.ps1

@@ -26,7 +26,11 @@ if ($DeployCode)
 	}
 	if (-not ($MaxA -eq ""))
 	{
-	    $hostconf.extensions.durableTask | Add-Member -NotePropertyName "maxConcurrentActivityFunctions" -NotePropertyValue $MaxA
+	    $hostconf.extensions.durableTask | Add-Member -Force -NotePropertyName "maxConcurrentActivityFunctions" -NotePropertyValue $MaxA
+	}
+	if (-not ($MaxO -eq ""))
+	{
+	    $hostconf.extensions.durableTask | Add-Member -Force -NotePropertyName "maxConcurrentOrchestratorFunctions" -NotePropertyValue $MaxO
 	}
 
 	$hostconf | ConvertTo-Json -depth 32 | set-content "./bin/$Configuration/net6.0/host.json"
@@ -52,7 +56,7 @@ if (-not ((az functionapp list -g $groupName --query "[].name"| ConvertFrom-Json
 
 	az functionapp config set -n $functionAppName -g $groupName --use-32bit-worker-process false
     az functionapp config appsettings set -n $functionAppName -g  $groupName --settings EventHubsConnection=$eventHubsConnectionString
-    az functionapp config appsettings set -n $functionAppName -g  $groupName --settings CorpusConnection=$corpusConnectionString
+    az functionapp config appsettings set -n $functionAppName -g  $groupName --settings EHNamespace=$Env:EHNamespace
 }
 else
 {