static IFdbDatabase GetLoggedDatabase(IFdbDatabase db, StreamWriter stream, bool autoFlush = false)
{
if (stream != null)
{
db.SetDefaultLogHandler(log => { stream.WriteLine(log.GetTimingsReport(true)); if (autoFlush)
{
stream.Flush();
}
});
}
return(db);
}
private async Task RunAsync(IFdbDatabase db, IDynamicKeySubspace location, CancellationToken ct, Action done, int N, int K, int W)
{
if (db == null)
{
throw new ArgumentNullException(nameof(db));
}
StringBuilder sb = new StringBuilder();
db.SetDefaultLogHandler((log) =>
{
sb.AppendLine(log.GetTimingsReport(true));
//Console.WriteLine(log.GetTimingsReport(true));
});
try
{
var workerPool = new FdbWorkerPool(location);
Console.WriteLine($"workerPool at {location.GetPrefix():P}");
var workerSignal = new AsyncCancelableMutex(ct);
var clientSignal = new AsyncCancelableMutex(ct);
int taskCounter = 0;
int msgSent = 0;
int msgReceived = 0;
Func <FdbWorkerMessage, CancellationToken, Task> handler = async(msg, _ct) =>
{
Interlocked.Increment(ref msgReceived);
//await Task.Delay(10 + Math.Abs(msg.Id.GetHashCode()) % 50);
await Task.Delay(10).ConfigureAwait(false);
};
Func <int, Task> worker = async(id) =>
{
await workerSignal.Task.ConfigureAwait(false);
Console.WriteLine("Worker #" + id + " is starting");
try
{
await workerPool.RunWorkerAsync(db, handler, ct).ConfigureAwait(false);
}
finally
{
Console.WriteLine("Worker #" + id + " has stopped");
}
};
Func <int, Task> client = async(id) =>
{
await clientSignal.Task.ConfigureAwait(false);
await Task.Delay(10).ConfigureAwait(false);
var rnd = new Random(id * 111);
for (int i = 0; i < N; i++)
{
var taskId = Slice.FromString("T" + Interlocked.Increment(ref taskCounter));
var taskBody = Slice.FromString("Message " + (i + 1) + " of " + N + " from client #" + id);
await workerPool.ScheduleTaskAsync(db, taskId, taskBody, ct).ConfigureAwait(false);
Interlocked.Increment(ref msgSent);
//if (i > 0 && i % 10 == 0) Console.WriteLine("@@@ Client#" + id + " pushed " + (i + 1) + " / " + N + " messages");
switch (rnd.Next(5))
{
case 0: await Task.Delay(10).ConfigureAwait(false); break;
case 1: await Task.Delay(100).ConfigureAwait(false); break;
case 2: await Task.Delay(500).ConfigureAwait(false); break;
}
}
Console.WriteLine("@@@ Client#" + id + " has finished!");
};
Func <string, Task> dump = async(label) =>
{
Console.WriteLine($"<dump label=\'{label}\' key=\'{location.GetPrefix():P}\'>");
using (var tr = await db.BeginTransactionAsync(ct))
{
await tr.Snapshot
.GetRange(KeyRange.StartsWith(location.GetPrefix()))
.ForEachAsync((kvp) =>
{
Console.WriteLine($" - {location.PrettyPrint(kvp.Key)} = {kvp.Value:V}");
}).ConfigureAwait(false);
}
Console.WriteLine("</dump>");
};
var workers = Enumerable.Range(0, W).Select((i) => worker(i)).ToArray();
var clients = Enumerable.Range(0, K).Select((i) => client(i)).ToArray();
DateTime start = DateTime.Now;
DateTime last = start;
int lastHandled = -1;
using (var timer = new Timer((_) =>
{
var now = DateTime.Now;
Console.WriteLine("@@@ T=" + now.Subtract(start) + ", sent: " + msgSent.ToString("N0") + ", recv: " + msgReceived.ToString("N0"));
Console.WriteLine("### Workers: " + workerPool.IdleWorkers + " / " + workerPool.ActiveWorkers + " (" + new string('#', workerPool.IdleWorkers) + new string('.', workerPool.ActiveWorkers - workerPool.IdleWorkers) + "), sent: " + workerPool.MessageScheduled.ToString("N0") + ", recv: " + workerPool.MessageReceived.ToString("N0") + ", delta: " + (workerPool.MessageScheduled - workerPool.MessageReceived).ToString("N0") + ", busy: " + workerPool.WorkerBusyTime + " (avg " + workerPool.WorkerAverageBusyDuration.TotalMilliseconds.ToString("N3") + " ms)");
if (now.Subtract(last).TotalSeconds >= 10)
{
//dump("timer").GetAwaiter().GetResult();
last = now;
if (lastHandled == msgReceived)
{ // STALL ?
Console.WriteLine("STALL! ");
done();
}
lastHandled = msgReceived;
}
if (msgReceived >= K * N)
{
dump("complete").GetAwaiter().GetResult();
done();
}
}, null, 1000, 1000))
{
var sw = Stopwatch.StartNew();
// start the workers
workerSignal.Set(async: true);
await Task.Delay(500);
await dump("workers started");
// start the clients
clientSignal.Set(async: true);
await Task.WhenAll(clients);
Console.WriteLine("Clients completed after " + sw.Elapsed);
await Task.WhenAll(workers);
Console.WriteLine("Workers completed after " + sw.Elapsed);
}
}
finally
{
Console.WriteLine("---------------------------------------------------------------------------");
Console.WriteLine("Transaction logs:");
Console.WriteLine();
Console.WriteLine(sb.ToString());
}
}
