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Nein, aber (viel) effizienter!
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* Zahlen für Windows, Quelle: “Windows Internals“, Solomin, Russinovich et al.
Jeffrey Richter sagt hingegen: 30 ms in Windows, Linux hat andere Zeiten…
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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
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ALU & FPU
Registers 0
Registers 1
CPU Core with
Hyper-Threading
Classic CPU Core
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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
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Quelle: “Systems Performance: Enterprise and the Cloud“, 2013, Brendan Gregg, Pearson Verlag
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ReadFile API: https://docs.microsoft.com/en-us/windows/win32/api/fileapi/nf-fileapi-readfile
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• EndSomething(result)
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• event SomethingCompleted
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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
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• task.GetAwaiter().GetResult() → ❌
• Thread.Sleep() → ❌
• await Task.Delay() → ✔
• Thread.SpinWait()
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var task2 = DoSomethingElseAsync();
await Task.WhenAll(task1, task2);
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