.NET 7 Web-APIs mit Turbo: Deep-Dive in async/await

Slides for my Webinar

Transcript

1. 🐻💬
2. 2 ▪ 🐻💬 ▪ ▪ ▪ ▪ ▪ ▪ ▪ ▪ Twitter: Deep Dive in async/await
3. 3 ▪ ▪ ▪ ▪ ▪ Deep Dive in async/await
4. 4 ▪ ▪ ▪ ▪ ▪ ▪ Deep Dive in async/await
5. 5 Nein, aber (viel) effizienter! Deep Dive in async/await
6. 6 Deep Dive in async/await
7. 7 ▪ ▪ ▪ ▪ ▪ ▪ ▪ Deep Dive in async/await
8. 9 • • • ▪ ▪ ▪ ▪ ▪ * Zahlen für Windows, Quelle: “Windows Internals“, Solomin, Russinovich et al. Jeffrey Richter sagt hingegen: 30 ms in Windows, Linux hat andere Zeiten… Deep Dive in async/await
9. 10 • • • • • • • • • • Deep Dive in async/await
10. 11 Kern 1 Kern 2 Kern 3 Kern 4 P2 T1 P2 T2 P3 T1 P1 T1 P3 T2 P1 T2 Kontext- Wechsel Kontext- & Prozess- Wechsel Deep Dive in async/await
11. 12 • • • • • • • • • Deep Dive in async/await
12. 13 ALU & FPU Registers 0 Registers 1 CPU Core with Hyper-Threading Classic CPU Core Deep Dive in async/await
13. 14 Kern 1 Kern 2 Kern 3 Kern 4 P2 T1 P2 T2 MyProc T1 P1 T2 P1 T1 MyProc T2 MyProc T3 MyProc T4 MyProc T5 MyProc T7 MyProc T6 Deep Dive in async/await
14. 15 • • • Quelle: “Systems Performance: Enterprise and the Cloud“, 2013, Brendan Gregg, Pearson Verlag Deep Dive in async/await
15. 16 • • • • • • Deep Dive in async/await
16. 17 Deep Dive in async/await
17. 18 ▪ ▪ ▪ ▪ ▪ ▪ ⏳ ▪ ▪ ▪ ReadFile API: https://docs.microsoft.com/en-us/windows/win32/api/fileapi/nf-fileapi-readfile Deep Dive in async/await
18. 19 ▪ ▪ ▪ ▪ ▪ ▪ ⏳ ▪ ReadFile API: https://docs.microsoft.com/en-us/windows/win32/api/fileapi/nf-fileapi-readfile Deep Dive in async/await
19. 20 Deep Dive in async/await
20. 21 • • IAsyncResult BeginSomething() • EndSomething(result) • • DoSomethingAsync() • event SomethingCompleted • • Task[<T>] DoSomethingAsync() Deep Dive in async/await
21. 22 Deep Dive in async/await
22. 23 • • • • • • .ContinueWith() • Deep Dive in async/await
23. 24 Task Task-Liste Threadpool T1 Threadpool T2 Kern 1 Kern 3 Kern 2 Kern 4 Threadpool T3 Threadpool T4 Threadpool Management Jeder Pool-Thread arbeitet Tasks in einer Endlosschleife ab Completed Tasks Deep Dive in async/await
24. 25 • • • • • 🤯 • • Deep Dive in async/await
25. 26 Deep Dive in async/await
26. 27 • • async Task<> MyMethodAsync() • • • await OtherMethodAsync() • • await • • • • Deep Dive in async/await
27. 28 Deep Dive in async/await
28. 29 Deep Dive in async/await
29. 30 • • task.GetAwaiter().GetResult() → ❌ • Thread.Sleep() → ❌ • await Task.Delay() → ✔ • Thread.SpinWait() • → ❌ • → ✔ Deep Dive in async/await
30. 31 • • var task1 = DoSomethingAsync(); var task2 = DoSomethingElseAsync(); await Task.WhenAll(task1, task2); • • • Task.Factory.StartNew(…, TaskCreationOptions.LongRunning); • • • Deep Dive in async/await
31. 32 • • • • Deep Dive in async/await
32. 33 Deep Dive in async/await
33. 34 ▪ ▪ ▪ ▪ ▪ ▪ ▪ Deep Dive in async/await
34. 35 ▪ ▪ ▪ ▪ ▪ 😉 P Deep Dive in async/await
35. 🐻💬