Haskell Compilation Improvement

By: Eric Bron (eric.bron.delete@this.zvisuel.privatefortest.com), April 11, 2013 10:08 am
Room: Moderated Discussions
> How would prefetching 1600 bytes be harmful to a 16KByte
> L1 or 1MB L2?

the amount of cache polution and wasted bandwidth depend on the size of your arrays, for example if you have small 3200 bytes arrays that you prefetch 1600 bytes ahead, you'll contuniously fetch 50% more data than actually required, this is an exagerated example but it should show why there is diminishing returns with more threads and increased prefetch scheduling distance

also you typically have more than one input stream to fetch from *per thread* + the store streams are also trashing your L1D cache
< Previous Post in ThreadNext Post in Thread >
TopicPosted ByDate
Haskell Compilation ImprovementSymmetry2013/04/09 10:41 AM
  Haskell Compilation ImprovementEric Bron2013/04/09 11:56 AM
  Haskell Compilation ImprovementLinus Torvalds2013/04/09 12:03 PM
    Haskell Compilation ImprovementEduardoS2013/04/09 12:20 PM
      Haskell Compilation ImprovementLinus Torvalds2013/04/09 12:31 PM
        Haskell Compilation ImprovementEduardoS2013/04/09 12:49 PM
    Haskell Compilation Improvement2013/04/11 01:36 AM
      Haskell Compilation ImprovementEric Bron2013/04/11 03:58 AM
        Haskell Compilation ImprovementBrendan2013/04/11 07:06 AM
          Haskell Compilation ImprovementSymmetry2013/04/11 07:45 AM
            Haskell Compilation ImprovementBrendan2013/04/11 11:31 AM
          Haskell Compilation ImprovementEric Bron2013/04/11 08:57 AM
            Haskell Compilation ImprovementBrendan2013/04/11 11:26 AM
              Haskell Compilation ImprovementEric Bron2013/04/11 11:36 AM
                Haskell Compilation ImprovementBrendan2013/04/11 05:00 PM
                  Haskell Compilation ImprovementDavid Kanter2013/04/11 08:50 PM
                    Software prefetching in JVMsGabriele Svelto2013/04/12 03:31 PM
                  Haskell Compilation ImprovementEric Bron2013/04/12 09:12 AM
                    Haskell Compilation ImprovementBrendan2013/04/12 11:40 AM
                      Haskell Compilation ImprovementEric Bron2013/04/12 12:15 PM
                        Haskell Compilation ImprovementBrendan2013/04/12 03:34 PM
                          Haskell Compilation ImprovementEric Bron2013/04/12 10:44 PM
                            Haskell Compilation ImprovementBrendan2013/04/13 02:20 AM
                              Haskell Compilation ImprovementEric Bron2013/04/13 02:32 AM
                                Haskell Compilation ImprovementBrendan2013/04/13 10:18 AM
                                  Haskell Compilation ImprovementEric Bron2013/04/14 01:04 AM
                          Haskell Compilation ImprovementEric Bron2013/04/15 08:34 AM
                            Haskell Compilation ImprovementBrendan2013/04/16 03:26 PM
                              Prefetch compilation testsEric Bron2013/04/21 12:52 AM
        Haskell Compilation Improvementanon2013/04/11 07:14 AM
          Haskell Compilation ImprovementMichael S2013/04/11 07:27 AM
            Haskell Compilation Improvementanon2013/04/11 08:25 AM
              Haskell Compilation ImprovementMichael S2013/04/11 08:37 AM
                Haskell Compilation Improvementbakaneko2013/04/11 09:39 AM
                  Haskell Compilation ImprovementEric Bron2013/04/11 10:08 AM
                    Haskell Compilation Improvementbakaneko2013/04/11 10:36 AM
                    Haskell Compilation Improvementanon2013/04/11 10:54 AM
                      Haskell Compilation ImprovementEric Bron2013/04/11 11:10 AM
                        Haskell Compilation Improvementanon2013/04/11 11:18 AM
                          Haskell Compilation ImprovementEric Bron2013/04/11 11:27 AM
                            Haskell Compilation Improvementanon2013/04/11 12:02 PM
                              Haskell Compilation ImprovementEric Bron2013/04/11 12:09 PM
                                Haskell Compilation ImprovementEric Bron2013/04/11 12:12 PM
                                Haskell Compilation Improvementanon2013/04/11 12:14 PM
                                  Haskell Compilation ImprovementEric Bron2013/04/11 12:30 PM
                                    Haskell Compilation Improvementanon2013/04/11 11:30 PM
                                      Haskell Compilation ImprovementEric Bron2013/04/12 09:25 AM
                                        Haskell Compilation Improvementanon2013/04/12 07:12 PM
                                          Haskell Compilation ImprovementEric Bron2013/04/12 10:51 PM
                                  Prefetch *hints*Konrad Schwarz2013/04/12 08:24 AM
                        Haskell Compilation ImprovementLinus Torvalds2013/04/11 12:56 PM
                          Inherent advantage of software prefetchJouni Osmala2013/04/11 09:41 PM
                            Inherent advantage of software prefetchSeni2013/04/13 03:40 AM
                            Another example: software scatter gather (NT)Megol2013/04/14 02:39 AM
                          Haskell Compilation ImprovementMaynard Handley2013/12/31 05:26 PM
                            Haskell Compilation ImprovementTREZA2013/12/31 05:44 PM
                              Haskell Compilation ImprovementMaynard Handley2013/12/31 07:49 PM
                                Haskell Compilation Improvementanon2013/12/31 10:39 PM
                                  Haskell Compilation ImprovementMaynard Handley2014/01/01 02:04 AM
                                  Haskell Compilation Improvementbakaneko2014/01/01 05:31 AM
                                Haskell Compilation ImprovementGabriele Svelto2014/01/02 07:57 AM
                                  Haskell Compilation ImprovementMichael S2014/01/02 08:37 AM
                                    Haskell Compilation ImprovementGabriele Svelto2014/01/02 10:09 AM
                                    Haskell Compilation ImprovementTREZA2014/01/02 12:43 PM
                            Haskell Compilation ImprovementMaynard Handley2013/12/31 06:07 PM
                            Future core architectures. (Was Haskell Compilation Improvement)Maynard Handley2014/01/03 12:06 AM
                              Speculative multi-threadingDavid Kanter2014/01/03 02:12 AM
                                Speculative multi-threadingMaynard Handley2014/01/03 05:01 AM
                              Future core architectures. (Was Haskell Compilation Improvement)Seni2014/01/03 01:09 PM
                              Future core architectures. (Was Haskell Compilation Improvement)Linus Torvalds2014/01/03 01:27 PM
                            Haskell Compilation ImprovementKonrad Schwarz2014/01/04 09:38 AM
              Haskell Compilation ImprovementEric Bron2013/04/11 09:23 AM
          Haskell Compilation ImprovementEric Bron2013/04/11 08:50 AM
            Haskell Compilation ImprovementEugene Nalimov2013/04/11 09:20 AM
              Haskell Compilation ImprovementEric Bron2013/04/11 09:28 AM
                Haskell Compilation ImprovementEduardoS2013/04/11 07:30 PM
            Haskell Compilation Improvementanon2013/04/11 10:19 AM
              Haskell Compilation ImprovementEric Bron2013/04/11 10:30 AM
                Haskell Compilation Improvementanon2013/04/11 10:50 AM
                  Haskell Compilation ImprovementEric Bron2013/04/11 11:03 AM
                    Haskell Compilation Improvementanon2013/04/11 11:16 AM
                      Haskell Compilation ImprovementEric Bron2013/04/11 11:24 AM
                        Haskell Compilation Improvementanon2013/04/11 12:09 PM
                          Haskell Compilation ImprovementEric Bron2013/04/11 12:43 PM
                            Haskell Compilation Improvementanon2013/04/11 11:27 PM
                              Haskell Compilation ImprovementEric Bron2013/04/12 12:15 AM
                                Haskell Compilation Improvementanon2013/04/12 07:14 PM
                                  Haskell Compilation ImprovementEric Bron2013/04/12 11:01 PM
                      Haskell Compilation ImprovementLinus Torvalds2013/04/11 01:05 PM
                        Haskell Compilation Improvementanon2013/04/11 10:42 PM
                        Haskell Compilation ImprovementRobert David Graham2013/04/12 02:12 PM
        Software prefetch architecturePaul A. Clayton2013/04/11 08:54 AM
          Software prefetch architectureEric Bron2013/04/11 09:06 AM
            Software prefetch architectureMegol2013/04/15 11:03 AM
              Software prefetch architectureEric Bron2013/04/15 11:30 AM
  low barMichael S2013/04/09 04:38 PM
Reply to this Topic
Name:
Email:
Topic:
Body: No Text
How do you spell avocado?