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Re: C++ threads versus PThreads for embedded Linux on ARM micro

Newsgroups comp.arch.embedded
Date 2018-07-31 15:16 -0700
References <ddc2da65-65a3-4307-b93b-5ad1cc62a418@googlegroups.com> <b28cf52f-2a9e-4e6a-9f3f-8b9921c3a0c1@googlegroups.com> <pjp272$1uc$1@dont-email.me>
Message-ID <4c2a996d-d88f-4954-a2af-e4e4663c6b35@googlegroups.com> (permalink)
Subject Re: C++ threads versus PThreads for embedded Linux on ARM micro
From StateMachineCOM <statemachineguru@gmail.com>

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@David Brown: Absolutely, if you stick to the traditional sequential programming paradigm with shared-state concurrency and blocking threads, the three best practices I listed in my previous post can all be questioned, relaxed, and ultimately dismissed.

That's because they represent a different, event-driven ("reactive") programming paradigm. The distinction is important, because the two programming paradigms do NOT mix well, certainly not inside the same thread. So it is important to always realize which paradigm you are using in which thread, to avoid confusion and mixing the two.

To back up this point, I'd like to recommend the article "Managing Concurrency in Complex Embedded Systems" by David Cummings (http://www.kellytechnologygroup.com/main/concurrent-embedded-systems-website.pdf ). The author presents general guiding principles of structuring threads, which he found particularly useful and which he applied in the NASA Mars rovers and other mission-critical systems. The paper starts with the description of the general thread structure, which can be immediately recognized as the event-loop. The bulk of the paper then focuses on discussing several scenarios in which designers might be tempted to apply thread BLOCKING, followed by explanations why blocking is always a BAD idea. Again, I repeat, that this conclusion applies to the "event-driven" thread structure, which the author started with.

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Thread

C++ threads versus PThreads for embedded Linux on ARM micro "gp.kiwi@gmail.com" <graeme.prentice@gmail.com> - 2018-07-20 04:01 -0700
  Re: C++ threads versus PThreads for embedded Linux on ARM micro David Brown <david.brown@hesbynett.no> - 2018-07-20 20:19 +0200
    Re: C++ threads versus PThreads for embedded Linux on ARM micro graeme.prentice@gmail.com - 2018-07-20 15:54 -0700
      Re: C++ threads versus PThreads for embedded Linux on ARM micro Paul Rubin <no.email@nospam.invalid> - 2018-07-20 18:27 -0700
        Re: C++ threads versus PThreads for embedded Linux on ARM micro graeme.prentice@gmail.com - 2018-07-20 23:58 -0700
          Re: C++ threads versus PThreads for embedded Linux on ARM micro David Brown <david.brown@hesbynett.no> - 2018-07-21 14:32 +0200
            Re: C++ threads versus PThreads for embedded Linux on ARM micro mac <acolvin@efunct.com> - 2018-07-26 19:37 +0000
          Re: C++ threads versus PThreads for embedded Linux on ARM micro Tauno Voipio <tauno.voipio@notused.fi.invalid> - 2018-07-21 21:48 +0300
          Re: C++ threads versus PThreads for embedded Linux on ARM micro Rob Gaddi <rgaddi@highlandtechnology.invalid> - 2018-07-23 09:58 -0700
  Re: C++ threads versus PThreads for embedded Linux on ARM micro Les Cargill <lcargill99@comcast.com> - 2018-07-22 13:15 -0500
  Re: C++ threads versus PThreads for embedded Linux on ARM micro StateMachineCOM <statemachineguru@gmail.com> - 2018-07-27 08:51 -0700
    Re: C++ threads versus PThreads for embedded Linux on ARM micro "gp.kiwi@gmail.com" <graeme.prentice@gmail.com> - 2018-07-27 14:53 -0700
      Re: C++ threads versus PThreads for embedded Linux on ARM micro Paul Rubin <no.email@nospam.invalid> - 2018-07-27 15:23 -0700
      Re: C++ threads versus PThreads for embedded Linux on ARM micro StateMachineCOM <statemachineguru@gmail.com> - 2018-07-30 09:08 -0700
      Re: C++ threads versus PThreads for embedded Linux on ARM micro David Brown <david.brown@hesbynett.no> - 2018-07-31 09:21 +0200
    Re: C++ threads versus PThreads for embedded Linux on ARM micro David Brown <david.brown@hesbynett.no> - 2018-07-31 09:13 +0200
      Re: C++ threads versus PThreads for embedded Linux on ARM micro StateMachineCOM <statemachineguru@gmail.com> - 2018-07-31 15:16 -0700
        Re: C++ threads versus PThreads for embedded Linux on ARM micro David Brown <david.brown@hesbynett.no> - 2018-08-01 07:53 +0200
        Re: C++ threads versus PThreads for embedded Linux on ARM micro pozz <pozzugno@gmail.com> - 2018-08-01 15:49 +0200
        Re: C++ threads versus PThreads for embedded Linux on ARM micro upsidedown@downunder.com - 2018-08-01 21:47 +0300
          Re: C++ threads versus PThreads for embedded Linux on ARM micro StateMachineCOM <statemachineguru@gmail.com> - 2018-08-01 12:11 -0700
            Re: C++ threads versus PThreads for embedded Linux on ARM micro Tom Gardner <spamjunk@blueyonder.co.uk> - 2018-08-01 20:23 +0100
            Re: C++ threads versus PThreads for embedded Linux on ARM micro David Brown <david.brown@hesbynett.no> - 2018-08-02 12:24 +0200
              Re: C++ threads versus PThreads for embedded Linux on ARM micro upsidedown@downunder.com - 2018-08-02 16:14 +0300
                Re: C++ threads versus PThreads for embedded Linux on ARM micro David Brown <david.brown@hesbynett.no> - 2018-08-02 16:43 +0200
                Re: C++ threads versus PThreads for embedded Linux on ARM micro StateMachineCOM <statemachineguru@gmail.com> - 2018-08-02 09:12 -0700
                Re: C++ threads versus PThreads for embedded Linux on ARM micro Tom Gardner <spamjunk@blueyonder.co.uk> - 2018-08-02 18:13 +0100
                Re: C++ threads versus PThreads for embedded Linux on ARM micro David Brown <david.brown@hesbynett.no> - 2018-08-02 23:05 +0200
                Re: C++ threads versus PThreads for embedded Linux on ARM micro StateMachineCOM <statemachineguru@gmail.com> - 2018-08-02 14:22 -0700
                Re: C++ threads versus PThreads for embedded Linux on ARM micro Niklas Holsti <niklas.holsti@tidorum.invalid> - 2018-08-03 10:14 +0300
                Re: C++ threads versus PThreads for embedded Linux on ARM micro David Brown <david.brown@hesbynett.no> - 2018-08-03 10:22 +0200
                Re: C++ threads versus PThreads for embedded Linux on ARM micro Tom Gardner <spamjunk@blueyonder.co.uk> - 2018-08-02 23:48 +0100
                Re: C++ threads versus PThreads for embedded Linux on ARM micro upsidedown@downunder.com - 2018-08-02 19:56 +0300
                Re: C++ threads versus PThreads for embedded Linux on ARM micro Tom Gardner <spamjunk@blueyonder.co.uk> - 2018-08-02 18:14 +0100
                Re: C++ threads versus PThreads for embedded Linux on ARM micro David Brown <david.brown@hesbynett.no> - 2018-08-02 23:12 +0200
                Re: C++ threads versus PThreads for embedded Linux on ARM micro Tom Gardner <spamjunk@blueyonder.co.uk> - 2018-08-02 23:52 +0100
                Re: C++ threads versus PThreads for embedded Linux on ARM micro David Brown <david.brown@hesbynett.no> - 2018-08-03 10:28 +0200
                Re: C++ threads versus PThreads for embedded Linux on ARM micro Tom Gardner <spamjunk@blueyonder.co.uk> - 2018-08-03 11:21 +0100
                Re: C++ threads versus PThreads for embedded Linux on ARM micro David Brown <david.brown@hesbynett.no> - 2018-08-03 13:51 +0200
                Re: C++ threads versus PThreads for embedded Linux on ARM micro upsidedown@downunder.com - 2018-08-03 09:11 +0300
                Re: C++ threads versus PThreads for embedded Linux on ARM micro George Neuner <gneuner2@comcast.net> - 2018-08-04 03:00 -0400
                Re: C++ threads versus PThreads for embedded Linux on ARM micro Robert Wessel <robertwessel2@yahoo.com> - 2018-08-02 12:23 -0500
                Re: C++ threads versus PThreads for embedded Linux on ARM micro David Brown <david.brown@hesbynett.no> - 2018-08-02 23:13 +0200
                Re: C++ threads versus PThreads for embedded Linux on ARM micro George Neuner <gneuner2@comcast.net> - 2018-08-04 03:08 -0400
              Re: C++ threads versus PThreads for embedded Linux on ARM micro Robert Wessel <robertwessel2@yahoo.com> - 2018-08-02 12:23 -0500
              Re: C++ threads versus PThreads for embedded Linux on ARM micro George Neuner <gneuner2@comcast.net> - 2018-08-02 14:15 -0400
                Re: C++ threads versus PThreads for embedded Linux on ARM micro Tom Gardner <spamjunk@blueyonder.co.uk> - 2018-08-02 19:21 +0100
                Re: C++ threads versus PThreads for embedded Linux on ARM micro David Brown <david.brown@hesbynett.no> - 2018-08-02 23:18 +0200
                Re: C++ threads versus PThreads for embedded Linux on ARM micro Tom Gardner <spamjunk@blueyonder.co.uk> - 2018-08-03 00:02 +0100
          Re: C++ threads versus PThreads for embedded Linux on ARM micro StateMachineCOM <statemachineguru@gmail.com> - 2018-08-01 12:28 -0700

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