Avoiding ping pong

By: Maynard Handley (name99.delete@this.name99.org), December 9, 2014 6:56 pm
Room: Moderated Discussions
Patrick Chase (patrickjchase.delete@this.gmail.com) on December 9, 2014 1:54 pm wrote:
> Cherry-picking one bit out of a long post...
>
> Maynard Handley (name99.delete@this.name99.org) on December 9, 2014 11:33 am wrote:
> > Linus Torvalds (torvalds.delete@this.linux-foundation.org) on December 8, 2014 8:08
> > There may well be severe limits to what we can do if we insist on writing every
> > parallel program in K&R C with pthreads. But we are slowly fumbling our way to
> > better abstractions. Blocks/lambdas/futures are still only a few years old, and
> > where they have been retrofitted to existing languages the edges are still pretty
> > obvious (horribly so in the case of C++, just ugly in the case of Objective C or C#).
>
> I think you're grossly overstating the pace of progress here. Blocks/lambdas/futures are very,
> very, VERY old. Lambda calculus was contemporaneous with Shannon's MS thesis and therefore
> as old as the concept of digital computing, and they were added to Lisp in the 50s.
>
> The fact that they are just now seeing mainstream use therefore constitutes extremely powerful evidence that
> progress on the language/algorithm front is agonizingly slow, i.e. exactly the opposite of what you claim.
>

Uhh, wot???
What I claimed was precisely that the reason we (apparently) don't see progress in parallel programming is less because it's largely impossible for most programmers (the Linus et al claim) than that progress in the field, while steady, is very slow.

But slow is NOT the same thing as stationary...

Moreover. at the same time that there are large old codebases, there are also completely new codebases, some of them substantial, some of them based on very different language paradigms from C+pthreads. Facebook is an interesting example. Twitter starting in Ruby and was willing/required to move the whole thing to a different (but still managed) language. I'm aware of one prominent silicon valley company that's in the process of moving their codebase from JS to Scala.
< Previous Post in ThreadNext Post in Thread >
TopicPosted ByDate
ARMv8 getting atomic operationsdmcq12/02/14 05:32 PM
  ARMv8 getting atomic operationsMaynard Handley12/02/14 07:33 PM
    ARMv8 getting atomic operationsDoug S12/02/14 10:30 PM
      ARMv8 getting atomic operationsdmcq12/03/14 03:16 AM
      ARMv8 getting atomic operationsMaynard Handley12/03/14 09:20 AM
      ARMv8 getting atomic operationsBrett12/03/14 04:46 PM
    ARMv8 getting atomic operationsAndreas12/03/14 06:51 AM
      ARMv8 getting atomic operationsLinus Torvalds12/03/14 11:15 AM
        ARMv8 getting atomic operationsanon12/03/14 05:08 PM
          Guaranteed transactionsPaul A. Clayton12/03/14 08:04 PM
            Guaranteed transactionsanon12/03/14 08:38 PM
              Avoiding ping pongPaul A. Clayton12/04/14 09:11 AM
                Avoiding ping ponganon12/04/14 10:15 AM
                  OoO window is limitedPaul A. Clayton12/04/14 01:06 PM
                Avoiding ping pongAaron Spink12/04/14 12:01 PM
                  Avoiding ping pongKonrad Schwarz12/04/14 01:10 PM
                    Avoiding ping pongAaron Spink12/04/14 02:31 PM
                    Avoiding ping pongGabriele Svelto12/04/14 02:49 PM
                      Avoiding ping pongKonrad Schwarz12/04/14 11:08 PM
                        Avoiding ping pongGabriele Svelto12/05/14 12:04 AM
                          Avoiding ping pongEric Bron nli12/05/14 02:28 AM
                            Avoiding ping pongKonrad Schwarz12/05/14 03:37 AM
                              Avoiding ping pongEric Bron nli12/05/14 04:23 AM
                                Avoiding ping pongKlimax12/05/14 05:47 AM
                                  Avoiding ping pongEric Bron12/05/14 06:24 AM
                              Avoiding ping pongGabriele Svelto12/05/14 10:38 AM
                                Avoiding ping pongKonrad Schwarz12/07/14 02:28 PM
                                  Avoiding ping pongGabriele Svelto12/08/14 07:10 PM
                                    Avoiding ping pongKonrad Schwarz12/09/14 05:12 AM
                                      Avoiding ping pongGabriele Svelto12/09/14 07:31 AM
                                        Avoiding ping ponganon12/09/14 11:24 PM
                            Avoiding ping pongGabriele Svelto12/05/14 10:17 AM
                              Avoiding ping pongEric Bron12/05/14 10:32 AM
                                Avoiding ping pongGabriele Svelto12/05/14 12:45 PM
                                  Avoiding ping pongEric Bron12/06/14 02:20 AM
                                    Avoiding ping pongnksingh12/06/14 03:42 AM
                                      Avoiding ping pongEric Bron12/06/14 04:04 AM
                                        Avoiding ping pongGiGNiC12/06/14 06:27 AM
                                          Avoiding ping pongEric Bron nli12/06/14 06:44 AM
                                          Avoiding ping pongEric Bron12/06/14 07:07 AM
                                            Avoiding ping pongnksingh12/07/14 04:06 PM
                                              Avoiding ping pongEric Bron12/08/14 04:17 AM
                                                Avoiding ping pongGiGNiC12/08/14 11:53 AM
                                                Avoiding ping pongnksingh12/08/14 05:53 PM
                                                  Avoiding ping pongEric Bron12/09/14 01:33 AM
                                    Avoiding ping pongdmsc12/06/14 04:12 AM
                                      Avoiding ping pongEric Bron12/06/14 04:25 AM
                                        Avoiding ping pongKlimax12/06/14 05:49 AM
                                          Avoiding ping pongrwessel12/07/14 02:34 AM
                                        Avoiding ping pongdmsc12/06/14 07:39 AM
                                        Avoiding ping pongKonrad Schwarz12/07/14 02:37 PM
                                          Avoiding ping pongMichael S12/07/14 04:37 PM
                                            Avoiding ping pongKonrad Schwarz12/08/14 04:35 AM
                          Avoiding ping pongKonrad Schwarz12/05/14 03:30 AM
                        Avoiding ping pongLinus Torvalds12/05/14 12:58 PM
                          Avoiding ping pongEric Bron12/06/14 02:42 AM
                            Avoiding ping pongnksingh12/06/14 03:51 AM
                              Avoiding ping pongEric Bron12/06/14 04:08 AM
                            Avoiding ping pongLinus Torvalds12/06/14 01:25 PM
                              Avoiding ping pongnksingh12/07/14 03:26 PM
                                Avoiding ping pongEric Bron12/08/14 04:35 AM
                                  Avoiding ping pongBrett12/08/14 10:00 AM
                                    Avoiding ping pongEric Bron12/08/14 10:48 AM
                                    Avoiding ping pongrwessel12/08/14 12:52 PM
                                      Avoiding ping pongBrett12/08/14 01:58 PM
                                      Avoiding ping pongDoug S12/08/14 02:04 PM
                              Avoiding ping pongJouni Osmala12/08/14 02:45 AM
                                Avoiding ping ponganon12/08/14 05:44 AM
                                  Avoiding ping pongJouni Osmala12/08/14 01:10 PM
                                    Avoiding ping pongLinus Torvalds12/08/14 01:34 PM
                                      Avoiding ping pongJouni Osmala12/08/14 03:47 PM
                                        Avoiding ping pongLinus Torvalds12/08/14 08:08 PM
                                          Avoiding ping pongGabriele Svelto12/09/14 07:48 AM
                                            Avoiding ping pongMaynard Handley12/09/14 11:41 AM
                                              Avoiding ping pongPatrick Chase12/09/14 01:06 PM
                                              Avoiding ping pongGabriele Svelto12/09/14 01:52 PM
                                                Avoiding ping pongPatrick Chase12/09/14 02:08 PM
                                            Why read RWT or Reddit when you can get journalists to do it for you?Rob Thorpe01/02/15 08:20 AM
                                              Why read RWT or Reddit when you can get journalists to do it for you?juanrga01/02/15 11:21 AM
                                                Why read RWT or Reddit when you can get journalists to do it for you?EduardoS01/02/15 11:37 AM
                                                  Why read RWT or Reddit when you can get journalists to do it for you?juanrga01/03/15 12:00 PM
                                                Why read RWT or Reddit when you can get journalists to do it for you?Eric Bron nli01/02/15 02:28 PM
                                                  Why read RWT or Reddit when you can get journalists to do it for you?juanrga01/03/15 12:02 PM
                                                    Why read RWT or Reddit when you can get journalists to do it for you?Michael S01/03/15 12:36 PM
                                                      Why read RWT or Reddit when you can get journalists to do it for you?juanrga01/03/15 01:11 PM
                                                        Why read RWT or Reddit when you can get journalists to do it for you?Michael S01/03/15 01:30 PM
                                                          Why read RWT or Reddit when you can get journalists to do it for you?Eric Bron01/03/15 02:57 PM
                                                            KNL cacheDavid Kanter01/03/15 07:36 PM
                                                              KNL cacheEric Bron01/04/15 03:34 AM
                                                                KNL cacheMichael S01/04/15 04:11 AM
                                                                  KNL cacheEric Bron01/04/15 04:57 AM
                                                                    KNL cacheMichael S01/04/15 05:21 AM
                                                                      KNL cacheEric Bron01/04/15 05:58 AM
                                                          Why read RWT or Reddit when you can get journalists to do it for you?juanrga01/07/15 05:47 AM
                                                            Why read RWT or Reddit when you can get journalists to do it for you?Michael S01/07/15 08:27 AM
                                                              Manycores vs multicoresjuanrga01/10/15 04:10 PM
                                                                Manycores vs multicoresAaron Spink01/10/15 05:32 PM
                                                                  Manycores vs multicoresjuanrga01/10/15 06:32 PM
                                                                    Manycores vs multicoresExophase01/10/15 06:49 PM
                                                                      Manycores vs multicoresjuanrga01/10/15 08:21 PM
                                                                        Manycores vs multicoresExophase01/10/15 08:51 PM
                                                                        Manycores vs multicoresAaron Spink01/10/15 09:03 PM
                                                                    Manycores vs multicoresAaron Spink01/10/15 07:21 PM
                                                                      Manycores vs multicoresjuanrga01/10/15 08:25 PM
                                                                        Manycores vs multicoresAaron Spink01/10/15 09:11 PM
                                                                          Manycores vs multicoresJouni Osmala01/11/15 04:50 AM
                                                                            Manycores vs multicoresjuanrga01/11/15 08:58 AM
                                                                            Manycores vs multicorescoppice01/12/15 10:01 PM
                                                                              Manycores vs multicoresJouni Osmala01/13/15 04:38 AM
                                                                        Manycores vs multicoresanon01/11/15 03:19 AM
                                                                      Manycores vs multicoresMichael S01/11/15 05:44 AM
                                                                        Manycores vs multicoresAaron Spink01/11/15 05:55 PM
                                                                          Manycores vs multicoresMichael S01/12/15 04:41 AM
                                                                            Manycores vs multicoresEric Bron01/12/15 06:29 AM
                                                                              Manycores vs multicoresEric Bron01/12/15 06:30 AM
                                                        Why read RWT or Reddit when you can get journalists to do it for you?Eric Bron01/03/15 02:54 PM
                                                          Why read RWT or Reddit when you can get journalists to do it for you?juanrga01/07/15 05:48 AM
                                                            Why read RWT or Reddit when you can get journalists to do it for you?Eric Bron01/07/15 07:41 AM
                                                              Manycores vs multicoresjuanrga01/10/15 04:14 PM
                                                    Why read RWT or Reddit when you can get journalists to do it for you?Eric Bron01/03/15 02:42 PM
                                                      Why read RWT or Reddit when you can get journalists to do it for you?juanrga01/07/15 06:03 AM
                                                        Why read RWT or Reddit when you can get journalists to do it for you?Eric Bron01/07/15 07:45 AM
                                                        Why read RWT or Reddit when you can get journalists to do it for you?Linus Torvalds01/08/15 03:09 PM
                                                          Pink unicorns for salejuanrga01/10/15 05:09 PM
                                                        Intentionally picking a competitors slow part is cheating ...Mark Roulo01/08/15 06:37 PM
                                                          Intentionally picking a competitors slow part is cheating ...coppice01/08/15 11:38 PM
                                                            Intentionally picking a competitors slow part is cheating ...Mark Roulo01/09/15 09:13 AM
                                                              Intentionally picking a competitors slow part is cheating ...Anon01/10/15 02:00 AM
                                                              Intentionally picking a competitors slow part is cheating ...David Hess01/11/15 01:03 PM
                                                            Intentionally picking a competitors slow part is cheating ...someone01/09/15 10:31 AM
                                                              Intentionally picking a competitors slow part is cheating ...coppice01/12/15 09:45 PM
                                                                Intentionally picking a competitors slow part is cheating ...coppice01/12/15 09:47 PM
                                                                  Intentionally picking a competitors slow part is cheating ...Michael S01/13/15 07:53 AM
                                                                    Intentionally picking a competitors slow part is cheating ...coppice01/13/15 09:44 AM
                                                                      Intentionally picking a competitors slow part is cheating ...Michael S01/13/15 10:01 AM
                                                                        Intentionally picking a competitors slow part is cheating ...coppice01/13/15 08:35 PM
                                                                      Core sizesjuanrga01/13/15 12:28 PM
                                                          NVIDIA'S FIRST CPU IS A WINNER (Linley Gwennap)juanrga01/10/15 04:34 PM
                                                        Why read RWT or Reddit when you can get journalists to do it for you?Patrick Chase01/08/15 07:02 PM
                                                        Why read RWT or Reddit when you can get journalists to do it for you?coppice01/08/15 10:18 PM
                                                          Why read RWT or Reddit when you can get journalists to do it for you?Patrick Chase01/09/15 11:54 AM
                                                            Why read RWT or Reddit when you can get journalists to do it for you?Mark Roulo01/09/15 12:59 PM
                                                              Why read RWT or Reddit when you can get journalists to do it for you?Patrick Chase01/09/15 03:20 PM
                                                                Why read RWT or Reddit when you can get journalists to do it for you?Eric Bron01/09/15 03:30 PM
                                                            Alternatives to OOOE (again)juanrga01/10/15 04:50 PM
                                                              Alternatives to OOOE (again)David Kanter01/11/15 12:10 AM
                                                                Alternatives to OOOE (again)juanrga01/11/15 08:30 AM
                                                            Why read RWT or Reddit when you can get journalists to do it for you?Gabriele Svelto01/11/15 12:53 AM
                                              Why read RWT or Reddit when you can get journalists to do it for you?Fake Linus Torvalds01/03/15 12:14 PM
                                                Why read RWT or Reddit when you can get journalists to do it for you?Rob Thorpe01/03/15 08:25 PM
                                          Avoiding ping pongMaynard Handley12/09/14 11:33 AM
                                            Avoiding ping pongPatrick Chase12/09/14 01:54 PM
                                              Avoiding ping pongMaynard Handley12/09/14 06:56 PM
                                      Avoiding ping pongSalvatore De Dominicis12/09/14 08:51 AM
                                        Avoiding ping pongPatrick Chase12/09/14 02:00 PM
                                      Avoiding ping pongook12/11/14 03:31 AM
                                      Avoiding ping pongArt Scott12/19/14 10:19 PM
                                        Avoiding ping pongEric Bron nli12/20/14 04:05 AM
                                      What about specialization?Troll?01/02/15 07:55 AM
                                        What about specialization?Ungo01/04/15 03:27 PM
                                      Avoiding ping pongfewwef01/05/15 08:16 PM
                                      Avoiding ping pongV.Krishn01/08/15 06:11 AM
                                    Avoiding ping pongGabriele Svelto12/08/14 07:32 PM
                                    Avoiding ping ponganon12/08/14 11:37 PM
                            Avoiding ping pongKonrad Schwarz12/10/14 06:23 AM
                              Avoiding ping pongLinus Torvalds12/10/14 11:56 AM
                          Object reference lockingDavid W12/08/14 11:36 PM
                            Object reference lockingPatrick Chase12/09/14 04:52 PM
                              Object reference lockingDavid W12/11/14 05:18 AM
                    ISA != interface for "most programmers"Paul A. Clayton12/04/14 03:34 PM
                      ISA != interface for "most programmers"rwessel12/04/14 07:50 PM
                  Interesting! (exporting hot lines/cache-aware ISA); "Please sir, I want some more" (NT)Paul A. Clayton12/04/14 02:26 PM
                  Avoiding ping pongMichael S12/06/14 03:48 PM
          ARMv8 getting atomic operationsLinus Torvalds12/04/14 12:05 PM
            LL/SC idiom recognition is not admitting RMW superiorityPaul A. Clayton12/04/14 02:34 PM
            ARMv8 getting atomic operationsanon12/04/14 10:17 PM
    ARMv8 getting atomic operationsPatrick Chase12/03/14 12:09 PM
  limited ordernksingh12/04/14 10:17 PM
    I didn't understand this either. (NT)Konrad Schwarz12/04/14 10:32 PM
    limited orderdmcq12/05/14 02:13 AM
    limited orderbakaneko12/05/14 09:11 AM
Reply to this Topic
Name:
Email:
Topic:
Body: No Text
How do you spell green?