From eee987f358f0feae1c1c378edaa38d867b29fe0b Mon Sep 17 00:00:00 2001
From: Andreas Zweili <andreas@2li.ch>
Date: Sat, 15 Sep 2018 08:48:47 +0200
Subject: [PATCH] add a excercise about parallel programming

---
 .../2018-09-15_parallel_programming.sln       | 25 +++++++++
 .../2018-09-15_parallel_programming.csproj    | 52 +++++++++++++++++
 .../App.config                                |  6 ++
 .../Program.cs                                | 56 +++++++++++++++++++
 .../Properties/AssemblyInfo.cs                | 36 ++++++++++++
 5 files changed, 175 insertions(+)
 create mode 100644 oop/2018-09-15_parallel_programming/2018-09-15_parallel_programming.sln
 create mode 100644 oop/2018-09-15_parallel_programming/2018-09-15_parallel_programming/2018-09-15_parallel_programming.csproj
 create mode 100644 oop/2018-09-15_parallel_programming/2018-09-15_parallel_programming/App.config
 create mode 100644 oop/2018-09-15_parallel_programming/2018-09-15_parallel_programming/Program.cs
 create mode 100644 oop/2018-09-15_parallel_programming/2018-09-15_parallel_programming/Properties/AssemblyInfo.cs

diff --git a/oop/2018-09-15_parallel_programming/2018-09-15_parallel_programming.sln b/oop/2018-09-15_parallel_programming/2018-09-15_parallel_programming.sln
new file mode 100644
index 0000000..bd0325e
--- /dev/null
+++ b/oop/2018-09-15_parallel_programming/2018-09-15_parallel_programming.sln
@@ -0,0 +1,25 @@
+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio 15
+VisualStudioVersion = 15.0.27703.2042
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "2018-09-15_parallel_programming", "2018-09-15_parallel_programming\2018-09-15_parallel_programming.csproj", "{C026DB21-31F8-46BC-B59A-85FC5E1A2242}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{C026DB21-31F8-46BC-B59A-85FC5E1A2242}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{C026DB21-31F8-46BC-B59A-85FC5E1A2242}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{C026DB21-31F8-46BC-B59A-85FC5E1A2242}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{C026DB21-31F8-46BC-B59A-85FC5E1A2242}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+	GlobalSection(ExtensibilityGlobals) = postSolution
+		SolutionGuid = {E6A60DFF-828A-4F59-96E9-46C92571FB10}
+	EndGlobalSection
+EndGlobal
diff --git a/oop/2018-09-15_parallel_programming/2018-09-15_parallel_programming/2018-09-15_parallel_programming.csproj b/oop/2018-09-15_parallel_programming/2018-09-15_parallel_programming/2018-09-15_parallel_programming.csproj
new file mode 100644
index 0000000..ea80c6a
--- /dev/null
+++ b/oop/2018-09-15_parallel_programming/2018-09-15_parallel_programming/2018-09-15_parallel_programming.csproj
@@ -0,0 +1,52 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="15.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <Import Project="$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props" Condition="Exists('$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props')" />
+  <PropertyGroup>
+    <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
+    <Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>
+    <ProjectGuid>{C026DB21-31F8-46BC-B59A-85FC5E1A2242}</ProjectGuid>
+    <OutputType>Exe</OutputType>
+    <RootNamespace>_2018_09_15_parallel_programming</RootNamespace>
+    <AssemblyName>2018-09-15_parallel_programming</AssemblyName>
+    <TargetFrameworkVersion>v4.6.1</TargetFrameworkVersion>
+    <FileAlignment>512</FileAlignment>
+    <AutoGenerateBindingRedirects>true</AutoGenerateBindingRedirects>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
+    <PlatformTarget>AnyCPU</PlatformTarget>
+    <DebugSymbols>true</DebugSymbols>
+    <DebugType>full</DebugType>
+    <Optimize>false</Optimize>
+    <OutputPath>bin\Debug\</OutputPath>
+    <DefineConstants>DEBUG;TRACE</DefineConstants>
+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
+    <PlatformTarget>AnyCPU</PlatformTarget>
+    <DebugType>pdbonly</DebugType>
+    <Optimize>true</Optimize>
+    <OutputPath>bin\Release\</OutputPath>
+    <DefineConstants>TRACE</DefineConstants>
+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
+  </PropertyGroup>
+  <ItemGroup>
+    <Reference Include="System" />
+    <Reference Include="System.Core" />
+    <Reference Include="System.Xml.Linq" />
+    <Reference Include="System.Data.DataSetExtensions" />
+    <Reference Include="Microsoft.CSharp" />
+    <Reference Include="System.Data" />
+    <Reference Include="System.Net.Http" />
+    <Reference Include="System.Xml" />
+  </ItemGroup>
+  <ItemGroup>
+    <Compile Include="Program.cs" />
+    <Compile Include="Properties\AssemblyInfo.cs" />
+  </ItemGroup>
+  <ItemGroup>
+    <None Include="App.config" />
+  </ItemGroup>
+  <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
+</Project>
\ No newline at end of file
diff --git a/oop/2018-09-15_parallel_programming/2018-09-15_parallel_programming/App.config b/oop/2018-09-15_parallel_programming/2018-09-15_parallel_programming/App.config
new file mode 100644
index 0000000..731f6de
--- /dev/null
+++ b/oop/2018-09-15_parallel_programming/2018-09-15_parallel_programming/App.config
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8" ?>
+<configuration>
+    <startup> 
+        <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.6.1" />
+    </startup>
+</configuration>
\ No newline at end of file
diff --git a/oop/2018-09-15_parallel_programming/2018-09-15_parallel_programming/Program.cs b/oop/2018-09-15_parallel_programming/2018-09-15_parallel_programming/Program.cs
new file mode 100644
index 0000000..bc8784b
--- /dev/null
+++ b/oop/2018-09-15_parallel_programming/2018-09-15_parallel_programming/Program.cs
@@ -0,0 +1,56 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace _2018_09_15_parallel_programming
+{
+    class Program
+    {
+        static void Main(string[] args)
+        {
+            var watch = System.Diagnostics.Stopwatch.StartNew();
+            Console.WriteLine("Serial Start");
+            SerialTest();
+            watch.Stop();
+            var serialelapsedMs = watch.ElapsedMilliseconds;
+            var serialelapsedTicks = watch.ElapsedTicks;
+            Console.WriteLine("Serial Stop");
+            Console.WriteLine("Elapse Time: " + serialelapsedMs.ToString());
+            Console.WriteLine("Elapsed Ticks: " + serialelapsedTicks.ToString());
+            watch.Reset();
+            Console.WriteLine("");
+            Console.WriteLine("");
+            Console.WriteLine("");
+            Console.WriteLine("Parallel Start");
+            watch.Start();
+            ParallelTest();
+            watch.Stop();
+            var elapsedMs = watch.ElapsedMilliseconds;
+            var elapsedTicks = watch.ElapsedTicks;
+            Console.WriteLine("Parallel Stop");
+            Console.WriteLine("Elapsed miliseconds: " + elapsedMs.ToString());
+            Console.WriteLine("Elapsed Ticks: " + elapsedTicks.ToString());
+            var factor = serialelapsedMs / elapsedMs;
+            Console.WriteLine("Parallel is " + factor.ToString() + " times faster.");
+            Console.ReadKey();
+        }
+        static void SerialTest()
+        {
+            double[] arr = new double[50000000];
+            for (int i = 0; i < 50000000; i++)
+            {
+                arr[i] = Math.Pow(i, 0.333) * Math.Sqrt(Math.Sin(i));
+            }
+        }
+        static void ParallelTest()
+        {
+            double[] arr = new double[50000000];
+            Parallel.For(0, 50000000, i =>
+            {
+                arr[i] = Math.Pow(i, 0.333) * Math.Sqrt(Math.Sin(i));
+            });
+        }
+    }
+}
diff --git a/oop/2018-09-15_parallel_programming/2018-09-15_parallel_programming/Properties/AssemblyInfo.cs b/oop/2018-09-15_parallel_programming/2018-09-15_parallel_programming/Properties/AssemblyInfo.cs
new file mode 100644
index 0000000..849404f
--- /dev/null
+++ b/oop/2018-09-15_parallel_programming/2018-09-15_parallel_programming/Properties/AssemblyInfo.cs
@@ -0,0 +1,36 @@
+using System.Reflection;
+using System.Runtime.CompilerServices;
+using System.Runtime.InteropServices;
+
+// General Information about an assembly is controlled through the following
+// set of attributes. Change these attribute values to modify the information
+// associated with an assembly.
+[assembly: AssemblyTitle("2018-09-15_parallel_programming")]
+[assembly: AssemblyDescription("")]
+[assembly: AssemblyConfiguration("")]
+[assembly: AssemblyCompany("")]
+[assembly: AssemblyProduct("2018-09-15_parallel_programming")]
+[assembly: AssemblyCopyright("Copyright ©  2018")]
+[assembly: AssemblyTrademark("")]
+[assembly: AssemblyCulture("")]
+
+// Setting ComVisible to false makes the types in this assembly not visible
+// to COM components.  If you need to access a type in this assembly from
+// COM, set the ComVisible attribute to true on that type.
+[assembly: ComVisible(false)]
+
+// The following GUID is for the ID of the typelib if this project is exposed to COM
+[assembly: Guid("c026db21-31f8-46bc-b59a-85fc5e1a2242")]
+
+// Version information for an assembly consists of the following four values:
+//
+//      Major Version
+//      Minor Version
+//      Build Number
+//      Revision
+//
+// You can specify all the values or you can default the Build and Revision Numbers
+// by using the '*' as shown below:
+// [assembly: AssemblyVersion("1.0.*")]
+[assembly: AssemblyVersion("1.0.0.0")]
+[assembly: AssemblyFileVersion("1.0.0.0")]