public void NotifyOverheadTest()
{
const int count = 800;
var timeProvider = Time.DefaultTimeProvider;
using (var group = new ThreadGroup(4, createBackgroundThreads: true, name: "NotifyOverheadTest")
{
DefaultConcurrencyPadding = 0
}) {
var queue = group.GetQueueForType <SlightlySlowWorkItem>();
var item = new SlightlySlowWorkItem();
var beforeEnqueue = timeProvider.Ticks;
for (int i = 0; i < count; i++)
{
queue.Enqueue(ref item, notifyChanged: true);
}
var afterEnqueue = timeProvider.Ticks;
var beforeWait = timeProvider.Ticks;
queue.WaitUntilDrained(10000);
var afterWait = timeProvider.Ticks;
var perItem = (afterWait - beforeWait) / (double)count / Time.MillisecondInTicks;
Console.WriteLine(
"Enqueue took {0:0000.00}ms, Wait took {1:0000.00}ms. Est speed {3:0.000000}ms/item Final thread count: {2}",
TimeSpan.FromTicks(afterEnqueue - beforeEnqueue).TotalMilliseconds,
TimeSpan.FromTicks(afterWait - beforeWait).TotalMilliseconds,
group.Count, perItem
);
}
}
public void MultipleThreadPerformanceTest()
{
const int count = 800;
var timeProvider = Time.DefaultTimeProvider;
using (var group = new ThreadGroup(4, createBackgroundThreads: true, name: "MultipleThreadPerformanceTest")
{
DefaultConcurrencyPadding = 0
}) {
var queue = group.GetQueueForType <SlightlySlowWorkItem>();
var item = new SlightlySlowWorkItem();
var beforeEnqueue = timeProvider.Ticks;
for (int i = 0; i < count; i++)
{
queue.Enqueue(ref item, notifyChanged: false);
// Notify the group periodically that we've added new work items.
// This ensures it spins up a reasonable number of threads.
if ((i % 500) == 0)
{
group.NotifyQueuesChanged();
}
}
var afterEnqueue = timeProvider.Ticks;
var beforeWait = timeProvider.Ticks;
queue.WaitUntilDrained(10000);
var afterWait = timeProvider.Ticks;
var perItem = (afterWait - beforeWait) / (double)count / Time.MillisecondInTicks;
Console.WriteLine(
"Enqueue took {0:0000.00}ms, Wait took {1:0000.00}ms. Est speed {3:0.000000}ms/item Final thread count: {2}",
TimeSpan.FromTicks(afterEnqueue - beforeEnqueue).TotalMilliseconds,
TimeSpan.FromTicks(afterWait - beforeWait).TotalMilliseconds,
group.Count, perItem
);
}
}
