From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on dcvr.yhbt.net X-Spam-Level: X-Spam-ASN: AS4713 221.184.0.0/13 X-Spam-Status: No, score=-3.0 required=3.0 tests=AWL,BAYES_00, DKIM_ADSP_CUSTOM_MED,FORGED_GMAIL_RCVD,FREEMAIL_FORGED_FROMDOMAIN, FREEMAIL_FROM,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, RCVD_IN_DNSWL_MED,SPF_PASS shortcircuit=no autolearn=ham autolearn_force=no version=3.4.2 Received: from neon.ruby-lang.org (neon.ruby-lang.org [221.186.184.75]) by dcvr.yhbt.net (Postfix) with ESMTP id 029E31F453 for ; Wed, 1 May 2019 15:15:51 +0000 (UTC) Received: from neon.ruby-lang.org (localhost [IPv6:::1]) by neon.ruby-lang.org (Postfix) with ESMTP id 424F9120AA3; Thu, 2 May 2019 00:15:46 +0900 (JST) Received: from o1678948x4.outbound-mail.sendgrid.net (o1678948x4.outbound-mail.sendgrid.net [167.89.48.4]) by neon.ruby-lang.org (Postfix) with ESMTPS id B5E9A120AC2 for ; Thu, 2 May 2019 00:15:43 +0900 (JST) Received: by filter0135p3las1.sendgrid.net with SMTP id filter0135p3las1-31603-5CC9B818-1D 2019-05-01 15:15:36.332297484 +0000 UTC m=+498315.931163277 Received: from herokuapp.com (unknown [54.159.201.37]) by ismtpd0025p1mdw1.sendgrid.net (SG) with ESMTP id sP44ZRIiRbegFoTew6ygBg for ; Wed, 01 May 2019 15:15:36.179 +0000 (UTC) Date: Wed, 01 May 2019 15:15:39 +0000 (UTC) From: eregontp@gmail.com Message-ID: References: Mime-Version: 1.0 X-Redmine-MailingListIntegration-Message-Ids: 67999 X-Redmine-Project: ruby-trunk X-Redmine-Issue-Id: 14736 X-Redmine-Issue-Author: ioquatix X-Redmine-Sender: Eregon X-Mailer: Redmine X-Redmine-Host: bugs.ruby-lang.org X-Redmine-Site: Ruby Issue Tracking System X-Auto-Response-Suppress: All Auto-Submitted: auto-generated X-SG-EID: =?us-ascii?Q?KippOI8ZHtTweq7XfQzW93937kJ4QNWwSBuHnaMEcr2Vl15ou7CxG11=2F0DtX16?= =?us-ascii?Q?aB5fxDzZpAcinDjwe0mSrjPOu0lmQDzg16UxNCD?= =?us-ascii?Q?K7a0LwUGZtH+2xY1ngpinBoae50RSraEf+jJ9h=2F?= =?us-ascii?Q?0RIxNrTz954HuzQZrSk9NExozPluNiZGQbhyqEs?= =?us-ascii?Q?aNtLWsfoSk=2FmWPd7kwQLxNr6ERQTisBwKCQ=3D=3D?= To: ruby-core@ruby-lang.org X-ML-Name: ruby-core X-Mail-Count: 92516 Subject: [ruby-core:92516] [Ruby trunk Feature#14736] Thread selector for flexible cooperative fiber based concurrency X-BeenThere: ruby-core@ruby-lang.org X-Mailman-Version: 2.1.15 Precedence: list Reply-To: Ruby developers List-Id: Ruby developers List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: ruby-core-bounces@ruby-lang.org Sender: "ruby-core" Issue #14736 has been updated by Eregon (Benoit Daloze). In case it was not clear, I'm in favor of this change for Ruby 3. I think it provides the essential primitives to build something powerful and flexible for efficient asynchronous IO in Ruby. ---------------------------------------- Feature #14736: Thread selector for flexible cooperative fiber based concurrency https://bugs.ruby-lang.org/issues/14736#change-77880 * Author: ioquatix (Samuel Williams) * Status: Open * Priority: Normal * Assignee: * Target version: ---------------------------------------- Ruby concurrency can be greatly enhanced by concurrent, deterministic IO. Fibers have been shown many times to be a great abstraction for this purpose. The retain normal code flow and don't require any kind of Thread synchronisation. They are enjoyable to write code with because you don't have to concern yourself with thread synchronisation or other complicated issues. The basic idea is that if some operation would block, it yields the Fiber, and other Fibers within the thread can continue to execute. There are a number of ways to implement this. Here is a proof of concept to amend the existing `rb_io_wait_readable`/`rb_io_wait_writable`. https://github.com/ruby/ruby/pull/1870 This design minimally affects the Ruby implementation and allows flexibility for selector implementation. With a small amount of work, we can support EventMachine (65 million downloads), NIO4r (21 million downloads). It would be trivial to back port. This PR isn't complete but I am seeking feedback. If it's a good idea, I will do my best to see it through to completion, including support for EventMachine and NIO4r. ---Files-------------------------------- port_scanner_threadlet.rb (925 Bytes) -- https://bugs.ruby-lang.org/