Akka.Benchmark: harden TcpOperationsBenchmark

[Aaronontheweb]

Changes

• add clear error logging to indicate what went wrong (i.e. we ran into [Akka.IO] TcpListener connection queue problem #5988)
• add timeouts in case clients fail / hang
• add retries for failed connects (failed connects should not happen, but they do currently)
• don't spam exceptions into the log

Checklist

For significant changes, please ensure that the following have been completed (delete if not relevant):

• This change follows the Akka.NET API Compatibility Guidelines.
• This change follows the Akka.NET Wire Compatibility Guidelines.

[Aaronontheweb]

Normalized the benchmark numbers so we can get clean RPS now:

BenchmarkDotNet v0.13.12, Windows 11 (10.0.26100.3775)
12th Gen Intel Core i7-1260P, 1 CPU, 16 logical and 12 physical cores
.NET SDK 8.0.403
  [Host]  : .NET 8.0.14 (8.0.1425.11118), X64 RyuJIT AVX2
  LongRun : .NET 8.0.14 (8.0.1425.11118), X64 RyuJIT AVX2

Job=LongRun  Concurrent=True  Server=True  
InvocationCount=1  IterationCount=10  LaunchCount=3  
RunStrategy=Monitoring  UnrollFactor=1  WarmupCount=3  

Method	MessageLength	ClientsCount	Mean	Error	StdDev	Req/sec
ClientServerCommunication	10	1	48.425 μs	6.1854 μs	9.2580 μs	20,650.46
ClientServerCommunication	10	3	20.112 μs	1.5802 μs	2.3652 μs	49,720.73
ClientServerCommunication	10	5	14.663 μs	1.7795 μs	2.6634 μs	68,199.82
ClientServerCommunication	10	7	13.155 μs	1.3002 μs	1.9460 μs	76,014.26
ClientServerCommunication	10	10	12.010 μs	1.1204 μs	1.6770 μs	83,265.31
ClientServerCommunication	10	20	9.033 μs	0.6629 μs	0.9922 μs	110,700.68
ClientServerCommunication	10	30	9.436 μs	0.6759 μs	1.0117 μs	105,981.82
ClientServerCommunication	10	40	9.197 μs	0.9373 μs	1.4029 μs	108,729.76
ClientServerCommunication	100	1	41.234 μs	1.5821 μs	2.3680 μs	24,251.92
ClientServerCommunication	100	3	19.735 μs	1.7063 μs	2.5539 μs	50,671.65
ClientServerCommunication	100	5	15.716 μs	2.0101 μs	3.0086 μs	63,629.59
ClientServerCommunication	100	7	15.130 μs	1.4337 μs	2.1459 μs	66,095.58
ClientServerCommunication	100	10	11.591 μs	1.1970 μs	1.7917 μs	86,272.65
ClientServerCommunication	100	20	9.551 μs	0.7549 μs	1.1300 μs	104,698.32
ClientServerCommunication	100	30	9.805 μs	1.2029 μs	1.8004 μs	101,991.35
ClientServerCommunication	100	40	10.117 μs	0.5260 μs	0.7873 μs	98,840.96

[Aaronontheweb]

lol these numbers for Akka.IO are generally awful - doesn't help that the original benchmark would hang and crash without any explanation.