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using System;using System.Collections.Generic;using System.Linq;using
System.Text;using System.Management;using System.Threading.Tasks;
namespace
TaskTool{ using System.Collections; using
System.Collections.Concurrent; using System.Diagnostics;
using System.Threading;
class Program
{ private int TotalNum;
private const int MAXDICNUM = 40000000;
private
static void Main(string[] args) {
var stopWath = new Stopwatch();
var allCells=new List<Point>();
var cash = new ConcurrentDictionary<DisCashPair,
short>();
InitialCells(allCells);
stopWath.Start(); Cal(allCells,
cash, 0, allCells.Count);
stopWath.Stop();
Console.WriteLine(string.Format("Single CPU {0},Cash num{1}",
stopWath.ElapsedMilliseconds, cash.Count));
cash.Clear();
stopWath.Reset();
stopWath.Start();
var cts = new
CancellationTokenSource(); var tf = new
TaskFactory(cts.Token, TaskCreationOptions.AttachedToParent,
TaskContinuationOptions.ExecuteSynchronously,
TaskScheduler.Default);
var
blockNum = (int)Math.Ceiling(allCells.Count*1.0/CPUTool.GetCpuNum());
var calTasks = new
Task[CPUTool.GetCpuNum()];
for (int
i = 0; i < CPUTool.GetCpuNum(); i++)
{ var startNum = i *
blockNum; var endNum = (i
+ 1) * blockNum; if
(endNum >= allCells.Count)
{
endNum = allCells.Count - 1;
}
calTasks[i]
=
Task.Factory.StartNew(() => Cal(allCells,cash, startNum, endNum));
}
var endTask = tf.ContinueWhenAll(calTasks, (tasks) =>{});
endTask.Wait(cts.Token);
//Task.WaitAll(calTasks.ToArray());
stopWath.Stop();
Console.WriteLine(string.Format("Single CPU {0},Cash num{1}",
stopWath.ElapsedMilliseconds, cash.Count));
//Console.WriteLine(string.Format("Single CPU {0},Cash num{1}",
stopWath.ElapsedMilliseconds, cash.Count));
}
//private static
Dictionary<DisCashPair, short> Finish(Task<Dictionary<DisCashPair,
short>>[] tasks) //{
// IEnumerable<KeyValuePair<DisCashPair, short>> result
= new Dictionary<DisCashPair, short>();
//
result = tasks.Select(t => t.Result).Aggregate(result, (current,
dic) => current.Union(dic));
//
return result.ToDictionary(r => r.Key, r => r.Value);
//}
private static
ConcurrentDictionary<DisCashPair, short> Cal(List<Point> allCells,
int start, int end) {
var cash = new ConcurrentDictionary<DisCashPair,
short>(); for (int i = start; i <
end; i++) {
var cell = allCells[i];
CalDis(cell, allCells, cash);
} return
cash; }
private static
void Cal(List<Point> allCells, ConcurrentDictionary<DisCashPair,
short> cash, int start, int end) {
for (int i = start; i < end; i++)
{
var cell = allCells[i];
CalDis(cell, allCells, cash);
} }
private static
void CalDis(Point cell, List<Point> allCells,
ConcurrentDictionary<DisCashPair, short> cash)
{ foreach (var desCell in
allCells) {
short dis;
if (cash.TryGetValue(new DisCashPair(cell, desCell), out
dis)) {
continue;
}
else
{ cash[new
DisCashPair(cell, desCell)] = GetDis(cell,desCell);
} }
}
private static short
GetDis(Point cell, Point desCell) {
var difX = (cell.X - desCell.X);
var difY = (cell.Y - desCell.Y);
var dis = Math.Sqrt(difX*difX + difY*difY);
return (short) (Math.Round(dis, 2)*100);
}
private static void
InitialCells(List<Point> allCells) {
var rd = new Random();
for (int i = 0; i < 5000; i++)
{
allCells.Add(new Point()
{
ID=i, X =
rd.NextDouble(),
Y = rd.NextDouble()
}); }
} }
public class DisCashPair {
public Point Src; public Point
Des;
public DisCashPair(Point src,Point
des) { Src =
src; Des = des;
}
public override int GetHashCode()
{ return
(Src.ID*397) ^ (Des.ID*397); }
public override bool Equals(object obj)
{ if (ReferenceEquals(obj, null))
return false; if (obj.GetType() !=
typeof (DisCashPair)) return false;
return Equals((DisCashPair) obj); }
private bool Equals(DisCashPair pair)
{ return (pair.Src.ID == this.Src.ID
&& pair.Des.ID == this.Des.ID) ||
(pair.Src.ID == this.Des.ID &&
pair.Des.ID == this.Src.ID); }
}
public struct Point {
public int ID; public double X;
public double Y; }
public static class
CPUTool { private static int
CPUNUM=Int32.MaxValue;
private const string
SEARCHSR = "Select * from Win32_Processor"; private
const string CORESNUM = "NumberOfCores";
public
static int GetCpuNum() {
if (CPUNUM == Int32.MaxValue)
{ CPUNUM =
new
System.Management.ManagementObjectSearcher(SEARCHSR).Get()
.Cast<ManagementBaseObject>()
.Sum(item =>
int.Parse(item[CORESNUM].ToString()));
}
return CPUNUM;
}
}}