public void UpdateDevice(BcDevices bcDevices)
{
if (bcDevices == null)
{
throw new ArgumentNullException();
}
if (this._device != null && bcDevices.Id != this._device.Id)
{
throw new InvalidOperationException("bcDevices.Id != _device.Id");
}
if (!this.HasDifferProperties(bcDevices))
{
return;
}
lock (this._processingWorkers)
{
ParallelEnumerable.ForAll <Worker>(ParallelEnumerable.AsParallel <Worker>((IEnumerable <Worker>) this._processingWorkers), (Action <Worker>)(worker => worker.Pause()));
this._device = bcDevices;
this._detectionConfiguration = new DetectionConfiguration()
{
MinFace = (uint)this._device.MinFace,
DetectionThreshold = (double)this._device.DetectorScore
};
this.SyncProcessorCount();
ParallelEnumerable.ForAll <Worker>(ParallelEnumerable.AsParallel <Worker>((IEnumerable <Worker>) this._processingWorkers), (Action <Worker>)(worker => worker.Resume()));
}
}
public void MainTest()
{
var sw = new Stopwatch();
sw.Start();
var query = from t in GetTypes() select EmulateProcessing(t);
foreach (string typeName in query)
{
PrintInfo(typeName);
}
sw.Stop();
WriteLine(".........");
WriteLine("Sequential LINQ query.");
WriteLine($"Time elapsed:{sw.Elapsed}");
WriteLine("Press ENTER to continue...");
Console.Clear();
sw.Reset();
sw.Start();
var parallelQuery = from t in ParallelEnumerable.AsParallel(GetTypes())
select EmulateProcessing(t);
foreach (string typeName in parallelQuery)
{
PrintInfo(typeName);
}
sw.Stop();
WriteLine(".......");
WriteLine("Parallel Linq query. The results are being merged on singel thread");
WriteLine($"Time elapsed:{sw.Elapsed}");
WriteLine("Press ENTER to continue...");
sw.Start();
parallelQuery = from t in GetTypes().AsParallel()
select EmulateProcessing(t);
parallelQuery.ForAll(PrintInfo);
sw.Stop();
WriteLine(".......");
WriteLine("Parallel Linq query. The results are being merged on singel parallel");
WriteLine($"Time elapsed:{sw.Elapsed}");
WriteLine("Press ENTER to continue...");
sw.Reset();
sw.Start();
query = from t in GetTypes().AsParallel().AsSequential()
select EmulateProcessing(t);
foreach (var typeName in query)
{
PrintInfo(typeName);
}
sw.Stop();
sw.Stop();
WriteLine(".......");
WriteLine("Parallel Linq query , transformed into sequential .");
WriteLine($"Time elapsed:{sw.Elapsed}");
WriteLine("Press ENTER to continue...");
}
public static NonParallelQuery AsParallel(this IEnumerable source)
{
#if DEBUG
return new NonParallelQuery(ParallelEnumerable.AsParallel(source));
#else
return new NonParallelQuery(source);
#endif
}
public static void Run()
{
var sw = new Stopwatch();
sw.Start();
var query = from t in GetTypes()
select EmulateProcessing(t);
foreach (var typeName in query)
{
PrintInfo(typeName);
}
sw.Stop();
Console.WriteLine(sw.Elapsed);
Console.WriteLine("-----------------");
//Console.Clear();
sw.Reset();
sw.Start();
var parallelQuery = from t in
ParallelEnumerable.AsParallel(GetTypes())
select EmulateProcessing(t);
foreach (var typeName in query)
{
PrintInfo(typeName);
}
sw.Stop();
Console.WriteLine(sw.Elapsed);
Console.WriteLine("-----------------");
sw.Reset();
sw.Start();
parallelQuery = from t in GetTypes().AsParallel()
select EmulateProcessing(t);
parallelQuery.ForAll(PrintInfo);
sw.Stop();
Console.WriteLine(sw.Elapsed);
Console.WriteLine("-----------------");
sw.Reset();
sw.Start();
query = from t in GetTypes().AsParallel().AsSequential()
select EmulateProcessing(t);
foreach (var typeName in query)
{
PrintInfo(typeName);
}
sw.Stop();
Console.WriteLine(sw.Elapsed);
Console.WriteLine("-----------------");
}
static void Main(string[] args)
{
Stopwatch sw = new Stopwatch();
sw.Start();
// 1
var query = from p in GetProjects()
select ProcessProject(p);
foreach (var name in query)
{
PrintProject(name);
}
sw.Stop();
Console.WriteLine($"使用LINQ查询时间：{sw.ElapsedMilliseconds}");
sw.Restart();
// 2
// 不同的线程处理不同的项目
var parallelQuery = from p in ParallelEnumerable.AsParallel(GetProjects())
select ProcessProject(p);
foreach (var name in parallelQuery)
{
PrintProject(name);
}
sw.Stop();
Console.WriteLine($"使用PLINQ查询，查得的结果在一个线程上输出，总共花费时间：{sw.ElapsedMilliseconds}");
sw.Restart();
// 3
// 单个处理项目和打印项目是同一个线程
parallelQuery = from p in GetProjects().AsParallel() select ProcessProject(p);
parallelQuery.ForAll(PrintProject);
sw.Stop();
Console.WriteLine($"使用PLINQ查询，查得的结果并行输出，总共花费时间：{sw.ElapsedMilliseconds}");
sw.Restart();
// 4 和第1种情况一样
query = from p in GetProjects().AsParallel().AsSequential() select ProcessProject(p);
foreach (var name in query)
{
PrintProject(name);
}
sw.Stop();
Console.WriteLine($"使用PLINQ查询，转成顺序计算，查得的结果在一个线程上输出，总共花费时间：{sw.ElapsedMilliseconds}");
Console.ReadKey();
}
public void UpdateForest(int optimizationSteps, float optimizationEps, float dt)
{
var allPlants = ParallelEnumerable.AsParallel(plants);
var allModules = allPlants.SelectMany(plant => plant.modules); // this merges all the modules into a single list
UpdateBoundingSpheres(allModules);
UpdateLight(allModules);
UpdateVigor(allPlants);
OptimizeRotation(allModules, optimizationSteps, optimizationEps);
UpdatePhysiologicalAge(allModules, dt);
GrowNewBranches(allModules);
// Do this at the end since it removes some modules (so allModules won't be right)
ShedBranches(allPlants, allModules);
}
public static void ShedBranches(ParallelQuery <Plant> allPlants, ParallelQuery <Module> allModules)
{
// Set as pruned
allModules.ForAll(module =>
{
// Branches are shed if vigor is less than vigorRootMin
if (module.root.v < module.plant.plantConfig.vigorRootMin)
{
//module.isShed = true;
}
});
// Remove all sheded modules from plants
allPlants.ForAll(plant =>
{
plant.modules = ParallelEnumerable.AsParallel(plant.modules).Where(module => !module.isShed).ToList();
});
}
public override void Run()
{
// PLINQ 是保守的，当不安全或并行不会提高查询效率时将默认使用顺序方法
// ParallelEnumerable 编译在 System.Core.dll
var models = this.CreateCollection(10);
/* 串行转并行
* 设置：
* AsUnordered：抛弃顺序
* WithMergeOptions：不缓存查询结果，查询出任一结果后立即返回
* WithDegreeOfParallelism：并行度=处理器数量
* WithExecutionMode：执行模式=并行优先
*/
var pmodels = models.AsParallel()
.AsUnordered()
.WithMergeOptions(ParallelMergeOptions.NotBuffered)
.WithDegreeOfParallelism(Environment.ProcessorCount)
.WithExecutionMode(ParallelExecutionMode.ForceParallelism);
// AsOrdered 并行时保留排序结果
var pmodelOrdered = ParallelEnumerable.AsParallel(models).AsOrdered();
_ = from model in models.AsParallel() select model;
// 并行转串行
_ = pmodels.AsSequential();
_ = ParallelEnumerable.AsSequential(pmodels);
_ = from model in pmodels.AsSequential() select model;
// 并行输出
Helper.PrintLine($"并行输出：{string.Join("、", pmodels.Select(m => m.Name))}");
// ForAll
pmodels.ForAll((m) => Helper.PrintLine($"并行执行：{m.Name}"));
// 保留顺序 (可能会比直接顺序执行更慢)
Helper.PrintLine($"保留顺序并行输出：{string.Join("、", pmodelOrdered.Select(m => m.Name))}");
// 捕捉异常
try
{
pmodels.ForAll(m => { if (m.Index % 2 == 1)
{
throw new ArgumentException();
}
});
}
catch (AggregateException ex)
{
Helper.PrintLine($"PLINQ 遇到 {ex.InnerExceptions.Count} 个异常：{string.Join("\n", ex.InnerExceptions.Select(e => e.Message))}");
}
// 自定义聚合函数
_ = pmodels.Aggregate(
0,
(sum, model) => { sum += model.Index; return(sum); },
(sum, result) => { result += sum; return(result); },
(result) => new RunModel(result));
_ = pmodels.Aggregate(
new RunModel(),
(result, model) => { result.Index += model.Index; return(result); });
}
public static void InvokeQuery()
{
var sw = new Stopwatch();
sw.Start();
var query = from t in GetTypes()
select EmulateProcessing(t);
sw.Stop();
//foreach (string typeName in query)
//{
// PrintInfo(typeName);
//}
Console.WriteLine("----");
Console.WriteLine("1Sequential LINQ query");
Console.WriteLine("Time elapsed:{0}", sw.Elapsed);
Console.WriteLine("Press enter to continue ....");
Console.ReadLine();
Console.Clear();
sw.Reset();
sw.Start();
var parallelQuery = from t in
ParallelEnumerable.AsParallel(GetTypes())
select EmulateProcessing(t);
sw.Stop();
//foreach (string typeName in parallelQuery)
//{
// PrintInfo(typeName);
//}
Console.WriteLine("---");
Console.WriteLine("2Parallel LINQ query The results are being merged on a single thread");
Console.WriteLine("Time elapsed:{0}", sw.Elapsed);
Console.WriteLine("Press ENTER to continue ...");
Console.ReadLine();
Console.Clear();
sw.Reset();
//耗时最短
sw.Start();
parallelQuery = from t in GetTypes().AsParallel()
select EmulateProcessing(t);
//var list = parallelQuery.ToList();
sw.Stop();
//parallelQuery.ForAll(PrintInfo);
Console.WriteLine("----");
Console.WriteLine("3Parallel LINQ query result being processed in parallel");
Console.WriteLine("Time elapsed :{0}", sw.Elapsed);
Console.WriteLine("Press ENTER to continue ..");
Console.ReadLine();
Console.Clear();
sw.Reset();
sw.Start();
query = from t in GetTypes().AsParallel().AsSequential()
select EmulateProcessing(t);
sw.Stop();
//foreach (var typeName in query)
//{
// PrintInfo(typeName);
//}
Console.WriteLine("----");
Console.WriteLine("4Parallel LINQ query, transformed into sequential");
Console.WriteLine("Time elapsedL:{0}", sw.Elapsed);
Console.WriteLine("Press Enter to continue");
Console.ReadLine();
Console.Clear();
}
