Epyc 2 needs no frequency drop for 256-bit AVX

By: Adrian (a.delete@this.acm.org), November 12, 2018 8:41 am
Room: Moderated Discussions


From the interview with AMD CTO Mark Papermaster:



IC: With the FP units now capable of doing 256-bit on their own, is there a frequency drop when 256-bit code is run, similar to when Intel runs AVX2?

MP: No, we don’t anticipate any frequency decrease. We leveraged 7nm. One of the things that 7nm enables us is scale in terms of cores and FP execution. It is a true doubling because we didn’t only double the pipeline with, but we also doubled the load-store and the data pipe into it.





https://www.anandtech.com/show/13578/naples-rome-milan-zen-4-an-interview-with-amd-cto-mark-papermaster
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Epyc 2 needs no frequency drop for 256-bit AVXAdrian2018/11/12 08:41 AM
  Epyc 2 needs no frequency drop for 256-bit AVXanon2018/11/12 09:51 AM
    Epyc 2 needs no frequency drop for 256-bit AVXdmcq2018/11/12 10:21 AM
    Epyc 2 needs no frequency drop for 256-bit AVXDoug S2018/11/12 01:08 PM
      Epyc 2 needs no frequency drop for 256-bit AVXanon2018/11/12 04:01 PM
        Epyc 2 needs no frequency drop for 256-bit AVXTravis Downs2018/11/13 02:13 PM
          Epyc 2 needs no frequency drop for 256-bit AVXanon2018/11/13 02:39 PM
            Epyc 2 needs no frequency drop for 256-bit AVXTravis Downs2018/11/13 03:35 PM
              Epyc 2 needs no frequency drop for 256-bit AVXanon2018/11/13 03:55 PM
                Epyc 2 needs no frequency drop for 256-bit AVXitsmydamnation2018/11/14 05:04 AM
                  Epyc 2 needs no frequency drop for 256-bit AVXanon2018/11/14 05:56 AM
    Epyc 2 needs no frequency drop for 256-bit AVXMaynard Handley2018/11/12 01:42 PM
      Epyc 2 needs no frequency drop for 256-bit AVXAdrian2018/11/12 10:13 PM
        Epyc 2 needs no frequency drop for 256-bit AVXanon2018/11/13 02:59 AM
          Epyc 2 needs no frequency drop for 256-bit AVXMichael S2018/11/13 03:50 AM
            Epyc 2 needs no frequency drop for 256-bit AVXanon2018/11/13 05:43 AM
          Epyc 2 needs no frequency drop for 256-bit AVXMaynard Handley2018/11/13 12:02 PM
            Epyc 2 needs no frequency drop for 256-bit AVXanon2018/11/13 02:00 PM
              Epyc 2 needs no frequency drop for 256-bit AVXMaynard Handley2018/11/13 05:52 PM
                Epyc 2 needs no frequency drop for 256-bit AVXTravis Downs2018/11/13 06:42 PM
                  Epyc 2 needs no frequency drop for 256-bit AVXMaynard Handley2018/11/13 08:17 PM
                    Epyc 2 needs no frequency drop for 256-bit AVXJames2018/11/14 05:30 AM
                      Epyc 2 needs no frequency drop for 256-bit AVXMaynard Handley2018/11/14 12:34 PM
                Epyc 2 needs no frequency drop for 256-bit AVXanon2018/11/14 05:46 AM
                Epyc 2 needs no frequency drop for 256-bit AVXnone2018/11/14 07:32 AM
                  Epyc 2 needs no frequency drop for 256-bit AVXMaynard Handley2018/11/14 12:41 PM
                    Epyc 2 needs no frequency drop for 256-bit AVXBrett2018/11/14 01:03 PM
        Epyc 2 needs no frequency drop for 256-bit AVXTravis Downs2018/11/13 02:57 PM
          Epyc 2 needs no frequency drop for 256-bit AVXMaynard Handley2018/11/13 06:05 PM
            Epyc 2 needs no frequency drop for 256-bit AVXTravis Downs2018/11/13 07:12 PM
  Epyc 2 needs no frequency drop for 256-bit AVXjuanrga2018/11/13 05:15 AM
    Epyc 2 needs no frequency drop for 256-bit AVXhobel2018/11/13 10:40 AM
      Epyc 2 needs no frequency drop for 256-bit AVXjuanrga2018/11/13 02:30 PM
        Epyc 2 needs no frequency drop for 256-bit AVXhobel2018/11/14 02:33 AM
          Epyc 2 needs no frequency drop for 256-bit AVXjuanrga2018/11/14 05:20 AM
            Epyc 2 needs no frequency drop for 256-bit AVXhobel2018/11/14 06:31 AM
              Epyc 2 needs no frequency drop for 256-bit AVXjuanrga2018/11/14 12:17 PM
                Epyc 2 needs no frequency drop for 256-bit AVXhobel2018/11/15 05:18 AM
                  Epyc 2 needs no frequency drop for 256-bit AVXjuanrga2018/11/15 11:51 AM
                    Epyc 2 needs no frequency drop for 256-bit AVXhobel2018/11/16 12:45 AM
                      Epyc 2 needs no frequency drop for 256-bit AVXjuanrga2018/11/16 04:55 AM
                        Epyc 2 needs no frequency drop for 256-bit AVXhobel2018/11/16 05:26 AM
                          Epyc 2 needs no frequency drop for 256-bit AVXjuanrga2018/11/18 05:03 AM
                            Epyc 2 needs no frequency drop for 256-bit AVXTravis Downs2018/11/18 11:21 AM
                            Epyc 2 needs no frequency drop for 256-bit AVXhobel2018/11/19 01:07 AM
        No way downlocking memmory saves 15 watts of idle powerHeikki Kultala2018/11/15 09:24 AM
          No way downlocking memmory saves 15 watts of idle poweranon2018/11/15 10:48 AM
          No way downlocking memmory saves 15 watts of idle powerjuanrga2018/11/15 12:08 PM
  Epyc 2 needs no frequency drop for 256-bit AVXDavid Kanter2018/11/19 04:33 PM
    Epyc 2 needs no frequency drop for 256-bit AVXTravis Downs2018/11/19 04:41 PM
      Epyc 2 needs no frequency drop for 256-bit AVXFoo_2018/11/20 05:38 AM
        Epyc 2 needs no frequency drop for 256-bit AVXTravis Downs2018/11/21 05:29 PM
          Epyc 2 needs no frequency drop for 256-bit AVXAdrian2018/11/21 10:31 PM
            Epyc 2 needs no frequency drop for 256-bit AVXAdrian2018/11/22 02:00 AM
              Epyc 2 needs no frequency drop for 256-bit AVXTravis Downs2018/11/22 11:30 AM
                Epyc 2 needs no frequency drop for 256-bit AVXAdrian2018/11/22 01:17 PM
                Epyc 2 needs no frequency drop for 256-bit AVXDavid Hess2018/11/22 01:29 PM
                  Epyc 2 needs no frequency drop for 256-bit AVXTravis Downs2018/11/22 02:27 PM
                    Epyc 2 needs no frequency drop for 256-bit AVXDavid Hess2018/11/22 03:05 PM
                Epyc 2 needs no frequency drop for 256-bit AVXFoo_2018/11/22 03:10 PM
    Epyc 2 needs no frequency drop for 256-bit AVXBrett2018/11/20 03:27 AM
      Epyc 2 needs no frequency drop for 256-bit AVXMichael S2018/11/21 03:25 AM
        Epyc 2 needs no frequency drop for 256-bit AVXwumpus2018/11/21 07:04 AM
          Epyc 2 needs no frequency drop for 256-bit AVXAdrian2018/11/21 12:13 PM
            Epyc 2 needs no frequency drop for 256-bit AVXwumpus2018/11/22 08:53 AM
              The are "meddling" with Vega 20 coreHeikki Kultala2018/11/22 01:26 PM
                The are "meddling" with Vega 20 coreanon2018/11/22 02:19 PM
              Epyc 2 needs no frequency drop for 256-bit AVXDavid Hess2018/11/22 02:56 PM
                Epyc 2 needs no frequency drop for 256-bit AVXMontaray Jack2018/11/23 03:46 AM
              Epyc 2 needs no frequency drop for 256-bit AVXMontaray Jack2018/11/23 04:21 AM
        Peak vector length hitBrett2018/11/25 08:08 PM
          Peak vector length hitMichael S2018/11/26 02:48 AM
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