59 lines
2.2 KiB
C#
59 lines
2.2 KiB
C#
// Copyright (c) .NET Foundation. All rights reserved.
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// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
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using System;
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namespace Microsoft.AspNetCore.Server.Kestrel.Transport.Libuv
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{
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/// <summary>
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/// Provides programmatic configuration of Libuv transport features.
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/// </summary>
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public class LibuvTransportOptions
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{
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/// <summary>
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/// The number of libuv I/O threads used to process requests.
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/// </summary>
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/// <remarks>
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/// Defaults to half of <see cref="Environment.ProcessorCount" /> rounded down and clamped between 1 and 16.
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/// </remarks>
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public int ThreadCount { get; set; } = ProcessorThreadCount;
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// TODO: Move all shutdown timeout logic back into core project.
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/// <summary>
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/// The amount of time after the server begins shutting down before connections will be forcefully closed.
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/// Kestrel will wait for the duration of the timeout for any ongoing request processing to complete before
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/// terminating the connection. No new connections or requests will be accepted during this time.
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/// </summary>
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/// <remarks>
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/// Defaults to 5 seconds.
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/// </remarks>
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public TimeSpan ShutdownTimeout { get; set; } = TimeSpan.FromSeconds(5);
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private static int ProcessorThreadCount
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{
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get
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{
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// Actual core count would be a better number
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// rather than logical cores which includes hyper-threaded cores.
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// Divide by 2 for hyper-threading, and good defaults (still need threads to do webserving).
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var threadCount = Environment.ProcessorCount >> 1;
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if (threadCount < 1)
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{
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// Ensure shifted value is at least one
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return 1;
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}
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if (threadCount > 16)
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{
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// Receive Side Scaling RSS Processor count currently maxes out at 16
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// would be better to check the NIC's current hardware queues; but xplat...
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return 16;
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}
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return threadCount;
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}
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}
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}
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}
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