From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.1 (2015-04-28) on dcvr.yhbt.net X-Spam-Level: X-Spam-ASN: AS4713 221.184.0.0/13 X-Spam-Status: No, score=-3.9 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,RCVD_IN_DNSWL_MED,SPF_PASS shortcircuit=no autolearn=ham autolearn_force=no version=3.4.1 Received: from neon.ruby-lang.org (neon.ruby-lang.org [221.186.184.75]) by dcvr.yhbt.net (Postfix) with ESMTP id 7A3921F6AC for ; Wed, 4 Jul 2018 08:17:13 +0000 (UTC) Received: from neon.ruby-lang.org (localhost [IPv6:::1]) by neon.ruby-lang.org (Postfix) with ESMTP id 4F209120B76; Wed, 4 Jul 2018 17:17:08 +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 648C71209D0 for ; Wed, 4 Jul 2018 17:17:06 +0900 (JST) Received: by filter0049p3las1.sendgrid.net with SMTP id filter0049p3las1-21330-5B3C827F-48 2018-07-04 08:17:03.943151257 +0000 UTC Received: from herokuapp.com (ec2-54-167-164-242.compute-1.amazonaws.com [54.167.164.242]) by ismtpd0025p1mdw1.sendgrid.net (SG) with ESMTP id bdZr9GbdSv-JatYes-Xv0w Wed, 04 Jul 2018 08:17:03.861 +0000 (UTC) Date: Wed, 04 Jul 2018 08:17:04 +0000 (UTC) From: samuel@oriontransfer.net To: ruby-core@ruby-lang.org Message-ID: References: Mime-Version: 1.0 X-Redmine-MailingListIntegration-Message-Ids: 63168 X-Redmine-Project: ruby-trunk X-Redmine-Issue-Id: 14736 X-Redmine-Issue-Author: ioquatix X-Redmine-Sender: ioquatix 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: ync6xU2WACa70kv/Ymy4QrNMhiuLXJG8OTL2vJD1yS7F6jJv9TaBCgX7zbj02nKMczZ7a4d4OoC/Nh aHmXCCEL7qldYrvAJXRxKeMRD9g2xQk4t4AepafvVUFzxw+oXe7F34qurZI9iyV+uD2Ar9YgAlley5 WQ5PJtRP5uS4bAPVltWLTk7FRnrfWTYjYWajSigByTArxLGHY8RUBax2gw== X-ML-Name: ruby-core X-Mail-Count: 87778 Subject: [ruby-core:87778] [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 ioquatix (Samuel Williams). Some of the benefits of this PR are: - Easy to implement by other Ruby implementations. - Baseline interface for implementing scheduling, on which other schedules can be constructed. - Minimal changes to MRI code (less bugs/less maintenance). ---------------------------------------- Feature #14736: Thread selector for flexible cooperative fiber based concurrency https://bugs.ruby-lang.org/issues/14736#change-72800 * 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/