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=-3.6 required=3.0 tests=BAYES_00,DKIM_ADSP_CUSTOM_MED, 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=3.4.1 Received: from neon.ruby-lang.org (neon.ruby-lang.org [221.186.184.75]) by dcvr.yhbt.net (Postfix) with ESMTP id 7B82D1F6AC for ; Thu, 5 Jul 2018 07:25:11 +0000 (UTC) Received: from neon.ruby-lang.org (localhost [IPv6:::1]) by neon.ruby-lang.org (Postfix) with ESMTP id CF372120BAE; Thu, 5 Jul 2018 16:25:09 +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 D6AA3120B9C for ; Thu, 5 Jul 2018 16:25:06 +0900 (JST) Received: by filter0054p3mdw1.sendgrid.net with SMTP id filter0054p3mdw1-6889-5B3DC7CF-22 2018-07-05 07:25:03.494776952 +0000 UTC Received: from herokuapp.com (ec2-54-80-62-90.compute-1.amazonaws.com [54.80.62.90]) by ismtpd0047p1mdw1.sendgrid.net (SG) with ESMTP id Vyg6ukUzRJSUbQlSbTBC7w Thu, 05 Jul 2018 07:25:03.457 +0000 (UTC) Date: Thu, 05 Jul 2018 07:25:04 +0000 (UTC) From: funny.falcon@gmail.com To: ruby-core@ruby-lang.org Message-ID: References: Mime-Version: 1.0 X-Redmine-MailingListIntegration-Message-Ids: 63191 X-Redmine-Project: ruby-trunk X-Redmine-Issue-Id: 14736 X-Redmine-Issue-Author: ioquatix X-Redmine-Sender: funny_falcon 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/Ymy4QrNMhiuLXJG8OTL2vJD1yS7TgyMIsqCB6qJF5IT9CPT1fyYGfKkNBaGDrr CVwHsmYLM6IfsOxWaFqMw8zaaAy3b4Z2asXEaHGh17ISlFkOFo9jfyx23oJ1ScpVXoBwMbnn49HfEg 3eeurJdvdF/5gKOfx06tiEXP1Q37xUDlv+5OYva0d+njAI9vps3pq9PINg== X-ML-Name: ruby-core X-Mail-Count: 87804 Subject: [ruby-core:87804] [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 funny_falcon (Yura Sokolov). Yes. While usually Enumerator doesn't call to Fiber.yield, it is called if Enumerator is used as external iterator: ``` > def aga; yield 1; Fiber.yield 4; yield 8; end > to_enum(:aga).to_a Traceback (most recent call last): 6: from /usr/bin/irb:11:in `
' 5: from (irb):76 4: from (irb):76:in `to_a' 3: from (irb):76:in `each' 2: from (irb):68:in `aga' 1: from (irb):68:in `yield' FiberError (can't yield from root fiber) > e = to_enum(:aga) => # > e.next => 1 > e.next => 4 > e.next => 8 > [:a,:b,:c].each.zip(to_enum(:aga)) => [[:a, 1], [:b, 4], [:c, 8]] ``` ---------------------------------------- Feature #14736: Thread selector for flexible cooperative fiber based concurrency https://bugs.ruby-lang.org/issues/14736#change-72821 * 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/