Microsoft Academic Program.NET Performanzanalyse und Optimierung Matej Ciesko Student Technology...

Microsoft Academic Program

.NET Performanzanalyse und Optimierung

Matej Ciesko

Student Technology Conference 2005

19/05/05 MS.NET – Performanzanalyse und OptimierungMatej Ciesko

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.NET Performanzanalyse und Optimierung

• Matej Ciesko• SSP – Microsoft Academic Program• Microsoft Deutschland GmbH• [email protected]


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Student Technology Conference 2005Moore’s Law

Anzahl der Transistoren verdoppelt sich alle 18 Monate

Intel Corp.


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Student Technology Conference 2005Agenda

Microsoft .NET Framework

Common Language Runtime

Base Classes

Web Services User Interface

Data and XML

ADO.NET XML ... ...

Operating SystemOperating System

HardwareHardware


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Student Technology Conference 2005Ziele

• WAS ?• WO ?• WIE ?


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Student Technology Conference 2005Definitionen

Performanz: “Performanz (aus engl. Performance) bezeichnet in der Informatik die Effizienz von Programmen und Hardware bezüglich des Ressourcenverbrauchs und der Qualität der Ausgabe.” [Wikipedia]

Optimierung:“Optimizing is the process of changing a program or the environment in which it runs to improve its performance.“

1. Problem identifizieren. 2. Problem evaluieren. 3. Optimierungstechnik anwenden.


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Student Technology Conference 2005Hardware

1. Speicher2. “Branch Predictions”3. Nebenläufigkeit

Itanium2 McKinley


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Student Technology Conference 20052. Profiling

Profiling:Präzise Messung (von Zeit/ Clock Ticks) von Hardware und/Software um Aussagen über das Laufzeitverhalten von Applikation treffen zu können.

1. Hardwarezähler2. Windows API and Tools3. .NET Profiling und Tools4. Demos


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Student Technology Conference 2005Hardware Counters I

• Hardware Counters

+ Sehr hohe zeitliche Auflösung•

CPU Profiling Hardware – Ereignisdetektoren (event detectors)– Ereigniszähler (event counters)

• Performanzereignisse :– Speicher – Pipeline Stalls– Brach Prediction– Ressource Utilization


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Student Technology Conference 2005Hardware Counters II

RDTSC – Read Time Stamp CounterRDPMC – Read Performance Monitor Counter

• >2 x CPU

•SpeedStep

Beispiel: RDTSC(Read Time Step Counter)

__int64 getTick(){

__int64 tmp;void *_ptr = &tmp;

_asm{rdtsc;mov ebx, _ptr;mov dword ptr[ebx], eax;mov dword ptr[ebx+4], edx;

}return tmp;

}


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Student Technology Conference 2005Windows Performance API

• Access performance counters through Windows API

• WMI - Windows Management Instrumentation

BOOL QueryPerformanceCounter( LARGE_INTEGER *lpPerformanceCount );BOOL QueryPerformanceFrequency( LARGE_INTEGER *lpPerformanceCount );

DWORD_PTR SetThreadAffinityMask( HANDLE hThread, DWORD_PTR

dwThreadAffinityMask );


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Student Technology Conference 2005.NET Profiling

PerfmonWMI

MS.NET 1.1[DllImport("Kernel32.dll")]private static extern bool QueryPerformanceCounter(out long _count);

MS.NET 2.0using System.Diagnostics;…Stopwatch _sw = new Stopwatch();_sw.Start();

do something_sw.Stop();

_sw.ElapsedTime; // TimeSpan_sw.ElapsedMilliseconds; //long_ws.ElapsedTicks; //long


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Student Technology Conference 2005.NET Profiling Services

set Cor_Enable_Profiling = 0x1set Cor_Profiler={FA0C6E77-AFF4-…992C}

COM – Schnittstellen: ICorProfilerCallbackICorProfilerInfo

CLR

_myProfilerCor_Enable_Profiling = TRUE

CoCreateInstance

ICorProfilerCallback::InitializeDemo AP


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Student Technology Conference 2005.NET 1.1. vs .NET 2.0

• SciMark • (SOR), Monte-Carlo Quadrat, Sparse Matrix Multiplikation,

LU Matrix Dekomposition

1.0 1.1

0

100

200

300

MFLOP

HW: 3.2 GHz Pentium 4 (Northwood), 1x CPU, HT disabledIntel 875P Chipset, 1 GB RAMhttp://rotor.cs.cornell.edu/SciMark

400

2.0


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Student Technology Conference 2005.NET 1.1. vs .NET 2.0

• Linpack 1000x1000

1.0 1.10

100

200

300

MFLOP

HW: 3.2 GHz Pentium 4 (Northwood), 1x CPU, HT disabledIntel 875P Chipset, 1 GB RAMhttp://rotor.cs.cornell.edu/SciMark

400

2.0Mono 1.1.3.NET 1.1 Debug


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Student Technology Conference 2005C# vs. C

HW: 2.4GHz Pentium 4, 1 GB RAM


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Student Technology Conference 2005Rotor

Microsoft Shared Source CLI - „Rotor“

• ECMA-334 (C#) • ECMA-335 (Common Language

Infrastructure)• Microsoft Windows® XP• FreeBSD

SSCLI: www.sscli.net


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Student Technology Conference 2005Zusammenfassung

• “Performance Engineering”• 1. Messen:

Sind Performanzanforderungen erfüllt?JA

• 2. NEIN: Finde langsamen Code

• Eigener Code? – Optimieren.• Framework Methode? – Weglassen, Alternative suchen.• Nicht ersetzbarer Aufruf? – Optimieren, Alternative

suchen.


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Mehr Informationen

• http://www.microsoft.com/perf• http://msdn.microsoft.com• http://www.thespoke.de• http://www.dotnetperformance.com/• RDTSC:

http://www.math.uwaterloo.ca/~jamuir/rdtscpm1.pdf

Microsoft Academic Program.NET Performanzanalyse und Optimierung Matej Ciesko Student Technology...

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