public SharedSynchronizationContextImpl(
SharedSynchronizationContext host,
int startingCpu,
int threadsCount,
string name,
CancellationToken token)
{
if (threadsCount < 0 || threadsCount > Environment.ProcessorCount)
{
threadsCount = Environment.ProcessorCount;
}
_host = host;
_name = name;
_hasJobEvent = new ManualResetEvent(false);
_runners = new List <ThreadRunner>();
_importedThreads = new List <ThreadRunner>();
_exportedRunners = new List <IDisposable>();
_tasks = new ConcurrentQueue <LocalTask>();
// Setup threads
for (var processor = startingCpu; processor < startingCpu + threadsCount; processor++)
{
_runners.Add(new ThreadRunner(
this, processor, _hasJobEvent, _tasks, token));
}
}
public static void Main()
{
using var contextsGroup = new SharedSynchronizationContext();
// full load
// var context = new SynchronizationContext();
// load only 2 cores
// using (var context = new MultiThreadSynchronizationContext(2, 2))
// full load
// using (var context = new MultiThreadSynchronizationContext(0, Environment.ProcessorCount))
// CPU0 -> CPU1 -> CPU0 -> CPU1 -> CPU0 -> CPU1 ...
// using (var context = new SwitchCoresSynchronizationContext(Environment.ProcessorCount))
var context = contextsGroup.GetSynchronizationContext(1, 2, "context #1");
var context2 = contextsGroup.GetSynchronizationContext(3, 2, "context #2");
{
var results = new ConcurrentQueue <string>();
LoopLoop(context, results);
Thread.Sleep(3000);
LoopLoop(context2, results);
var spin = new SpinWait();
var starvation = Stopwatch.StartNew();
do
{
while (results.TryDequeue(out var message))
{
//Console.WriteLine(message);
starvation.Restart();
}
spin.SpinOnce();
} while (starvation.ElapsedMilliseconds < 300);
}
}
