And the links..

By: Howard Chu (, February 14, 2008 1:16 pm
Room: Moderated Discussions
Anders Jensen (@.) on 2/14/08 wrote:
>Anders Jensen (@.) on 2/14/08 wrote:
>>Quoted from the white paper "The Landscape of Parallel Computing Research: A View from Berkeley".
>>This paper just gave Berkeley $10M over 5 years from MS and Intel to research the
>>future of parallel computing. Happy reading.

* The overarching goal should be to make it easy to write programs that execute efficiently on highly parallel computing systems

Of course "easy" and "efficient" are opposed goals.

* The target should be 1000s of cores per chip, as these chips are built from processing elements that are the most efficient in MIPS (Million Instructions per Second) per watt, MIPS per area of silicon, and MIPS per development dollar.

MIPS per development dollar seems like an empty target. Whenever you decide on any development direction, eventually the costs come down as you learn more. R&D should always be a cost-is-no-object proposition because once you find the best solution, someone will figure out how to bring the cost inline.

* Instead of traditional benchmarks, use 13 "Dwarfs" to design and evaluate parallel programming models and architectures. (A dwarf is an algorithmic method that captures a pattern of computation and communication.)

uh huh, sure. micro-benchmarks by another name, which all happen to have a nasty habit of giving zero predictive worth once they're all combined into a full running system.

* "Autotuners" should play a larger role than conventional compilers in translating parallel programs.

These guys seem to like introspective JVMs and JIT optimizers. I always view this as a losing proposition. I can either have 100% of my CPU resources crunching a solution to my problem, or 100-N% crunching, and N% trying to dynamically re-optimize my code. Hint - write your code correctly in the first place.

* To maximize programmer productivity, future programming models must be more human-centric than the conventional focus on hardware or applications.

Kinda like what I touched on before, designing programming languages whose input tokens aren't character-based. Aside from that it's all bunk. 3000+ years ago a guy named Hercules had to clean out the Augean stables. Today mucking horse stalls is still a dirty job. That's the nature of the job.

* To be successful, programming models should be independent of the number of processors.
* To maximize application efficiency, programming models should support a wide range of data types and successful models of parallelism: task-level parallelism, word-level parallelism, and bit-level parallelism.
* Architects should not include features that significantly affect performance or energy if programmers cannot accurately measure their impact via performance counters and energy counters.

* Traditional operating systems will be deconstructed and operating system functionality will be orchestrated using libraries and virtual machines.

Which directly opposes the stated goal of efficiency.

* To explore the design space rapidly, use system emulators based on Field Programmable Gate Arrays (FPGAs) that are highly scalable and low cost.
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TopicPosted ByDate
Multicore is unlikely to be the ideal answer.Anders Jensen2008/02/14 04:24 AM
  And the links..Anders Jensen2008/02/14 04:25 AM
    Disappointing..Linus Torvalds2008/02/14 10:17 AM
      Disappointing..Mark Roulo2008/02/14 11:03 AM
        LOL (NT)Linus Torvalds2008/02/14 05:43 PM
      Disappointing..David Patterson2008/02/15 11:53 AM
        Disappointing..Linus Torvalds2008/02/15 05:01 PM
          Disappointing..anon2008/02/15 08:54 PM
            Disappointing..JasonB2008/02/19 07:45 PM
          Disappointing..Ilya Lipovsky2008/02/22 06:27 PM
          Disappointing..Scott Bolt2008/03/16 11:36 AM
        Need for new programming languagesVincent Diepeveen2008/02/19 06:18 AM
          Need for new programming languagesPete Wilson2008/02/24 11:41 AM
        Disappointing..Zan2008/02/25 10:52 PM
      Disappointing..Robert Myers2008/02/19 09:47 PM
        Disappointing..Fred Bosick2008/02/22 06:38 PM
          Disappointing..Robert Myers2008/03/01 01:17 PM
        The limits of single CPU speed are here.John Nagle2008/03/14 10:55 AM
          The limits of single CPU speed are here.Howard Chu2008/03/15 01:02 AM
            The limits of single CPU speed are here.slacker2008/03/15 08:08 AM
              The limits of single CPU speed are here.Howard Chu2008/03/17 01:47 AM
                The limits of single CPU speed are here.slacker2008/03/17 10:04 AM
    And the links..Howard Chu2008/02/14 12:58 PM
      I take some of that backHoward Chu2008/02/14 01:55 PM
      And the links..Jesper Frimann2008/02/14 02:02 PM
      And the links..Ilya Lipovsky2008/02/15 02:24 PM
        And the links..iz2008/02/17 10:55 AM
          And the links..JasonB2008/02/17 07:09 PM
            And the links..Ilya Lipovsky2008/02/18 01:54 PM
              And the links..JasonB2008/02/18 10:34 PM
                And the links..Thiago Kurovski2008/02/19 07:01 PM
                  And the links..iz2008/02/20 10:36 AM
                And the links..Ilya Lipovsky2008/02/20 03:37 PM
                  And the links..JasonB2008/02/20 06:28 PM
        And the links..JasonB2008/02/17 06:47 PM
          And the links..Ilya Lipovsky2008/02/18 02:27 PM
            And the links..JasonB2008/02/18 10:00 PM
              And the links..JasonB2008/02/19 03:14 AM
              And the links..Ilya Lipovsky2008/02/20 04:29 PM
                And the links..JasonB2008/02/20 06:14 PM
                  And the links..Ilya Lipovsky2008/02/21 11:07 AM
    And the links..Howard Chu2008/02/14 01:16 PM
      And the links..Jukka Larja2008/02/15 03:00 AM
      Berkeley View on ParallelismDavid Kanter2008/02/15 11:41 AM
        Berkeley View on ParallelismHoward Chu2008/02/15 12:49 PM
          Berkeley View on ParallelismDavid Kanter2008/02/15 03:48 PM
            Berkeley View on ParallelismHoward Chu2008/02/17 05:42 PM
              Berkeley View on Parallelismnick2008/02/17 09:15 PM
                Berkeley View on ParallelismHoward Chu2008/02/18 04:23 PM
                  Berkeley View on Parallelismnick2008/02/18 10:03 PM
                    Berkeley View on ParallelismHoward Chu2008/02/19 01:39 AM
                  Berkeley View on Parallelismrcf2008/02/19 12:44 PM
                    Berkeley View on ParallelismHoward Chu2008/02/19 03:25 PM
              Average programmersanon2008/02/18 12:40 PM
        Berkeley View on ParallelismJasonB2008/02/15 08:02 PM
        Berkeley View on ParallelismJasonB2008/02/15 08:02 PM
          Berkeley View on ParallelismDean Kent2008/02/15 08:07 PM
          Berkeley View on ParallelismRay2008/02/20 03:20 PM
            Berkeley View on ParallelismJasonB2008/02/20 06:11 PM
              Berkeley View on ParallelismFritzR2008/02/24 03:08 PM
          rubyinline, etc.nordsieck2008/02/22 03:38 PM
            rubyinline, etc.JasonB2008/02/23 05:53 AM
              rubyinline, etc.nordsieck2008/03/02 01:40 AM
                rubyinline, etc.Michael S2008/03/02 02:49 AM
                  rubyinline, etc.Dean Kent2008/03/02 07:41 AM
                    rubyinline, etc.Michael S2008/03/02 08:19 AM
                      rubyinline, etc.Dean Kent2008/03/02 08:30 AM
                        rubyinline, etc.JasonB2008/03/02 05:26 PM
                rubyinline, etc.JasonB2008/03/02 06:01 PM
                  rubyinline, etc.Anonymous2008/03/03 02:11 AM
                    rubyinline, etc.JasonB2008/03/03 09:40 AM
                      rubyinline, etc.Foo_2008/03/09 09:59 AM
                        rubyinline, etc.JasonB2008/03/10 01:12 AM
                        rubyinline, etc.Gabriele Svelto2008/03/10 02:22 AM
                          rubyinline, etc.JasonB2008/03/10 04:35 AM
                            C++ for beginnersMichael S2008/03/10 05:16 AM
                              C++ for beginnersJasonB2008/03/10 06:35 AM
                          C++Michael S2008/03/10 04:55 AM
                rubyinline, etc.Linus Torvalds2008/03/03 11:35 AM
                  rubyinline, etc.Dean Kent2008/03/03 02:35 PM
                    rubyinline, etc.JasonB2008/03/03 03:57 PM
                      rubyinline, etc.Dean Kent2008/03/03 08:10 PM
                        rubyinline, etc.Michael S2008/03/04 01:53 AM
                          rubyinline, etc.Dean Kent2008/03/04 07:51 AM
                            rubyinline, etc.Michael S2008/03/04 08:29 AM
                              rubyinline, etc.Dean Kent2008/03/04 08:53 AM
                                rubyinline, etc.Michael S2008/03/04 11:20 AM
                                  rubyinline, etc.Dean Kent2008/03/04 02:13 PM
                                    read it. thanks (NT)Michael S2008/03/04 04:31 PM
                  efficient HLL'sPatrik Hägglund2008/03/04 03:34 PM
                    efficient HLL'sWes Felter2008/03/04 09:33 PM
                      efficient HLL'sPatrik Hägglund2008/03/05 01:23 AM
                        efficient HLL'sMichael S2008/03/05 02:45 AM
                          efficient HLL'sWilco2008/03/05 05:34 PM
                            efficient HLL'sHoward Chu2008/03/05 07:11 PM
                              efficient HLL'sWilco2008/03/06 02:27 PM
                    efficient HLL'sanon2008/03/05 08:20 AM
      And the links..Groo2008/02/17 04:28 PM
        And the links..Vincent Diepeveen2008/02/18 02:33 AM
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