Epyc 2 needs no frequency drop for 256-bit AVX

By: Adrian (a.delete@this.acm.org), November 12, 2018 7:41 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 07:41 AM
  Epyc 2 needs no frequency drop for 256-bit AVXanon2018/11/12 08:51 AM
    Epyc 2 needs no frequency drop for 256-bit AVXdmcq2018/11/12 09:21 AM
    Epyc 2 needs no frequency drop for 256-bit AVXDoug S2018/11/12 12:08 PM
      Epyc 2 needs no frequency drop for 256-bit AVXanon2018/11/12 03:01 PM
        Epyc 2 needs no frequency drop for 256-bit AVXTravis Downs2018/11/13 01:13 PM
          Epyc 2 needs no frequency drop for 256-bit AVXanon2018/11/13 01:39 PM
            Epyc 2 needs no frequency drop for 256-bit AVXTravis Downs2018/11/13 02:35 PM
              Epyc 2 needs no frequency drop for 256-bit AVXanon2018/11/13 02:55 PM
                Epyc 2 needs no frequency drop for 256-bit AVXitsmydamnation2018/11/14 04:04 AM
                  Epyc 2 needs no frequency drop for 256-bit AVXanon2018/11/14 04:56 AM
    Epyc 2 needs no frequency drop for 256-bit AVXMaynard Handley2018/11/12 12:42 PM
      Epyc 2 needs no frequency drop for 256-bit AVXAdrian2018/11/12 09:13 PM
        Epyc 2 needs no frequency drop for 256-bit AVXanon2018/11/13 01:59 AM
          Epyc 2 needs no frequency drop for 256-bit AVXMichael S2018/11/13 02:50 AM
            Epyc 2 needs no frequency drop for 256-bit AVXanon2018/11/13 04:43 AM
          Epyc 2 needs no frequency drop for 256-bit AVXMaynard Handley2018/11/13 11:02 AM
            Epyc 2 needs no frequency drop for 256-bit AVXanon2018/11/13 01:00 PM
              Epyc 2 needs no frequency drop for 256-bit AVXMaynard Handley2018/11/13 04:52 PM
                Epyc 2 needs no frequency drop for 256-bit AVXTravis Downs2018/11/13 05:42 PM
                  Epyc 2 needs no frequency drop for 256-bit AVXMaynard Handley2018/11/13 07:17 PM
                    Epyc 2 needs no frequency drop for 256-bit AVXJames2018/11/14 04:30 AM
                      Epyc 2 needs no frequency drop for 256-bit AVXMaynard Handley2018/11/14 11:34 AM
                Epyc 2 needs no frequency drop for 256-bit AVXanon2018/11/14 04:46 AM
                Epyc 2 needs no frequency drop for 256-bit AVXnone2018/11/14 06:32 AM
                  Epyc 2 needs no frequency drop for 256-bit AVXMaynard Handley2018/11/14 11:41 AM
                    Epyc 2 needs no frequency drop for 256-bit AVXBrett2018/11/14 12:03 PM
        Epyc 2 needs no frequency drop for 256-bit AVXTravis Downs2018/11/13 01:57 PM
          Epyc 2 needs no frequency drop for 256-bit AVXMaynard Handley2018/11/13 05:05 PM
            Epyc 2 needs no frequency drop for 256-bit AVXTravis Downs2018/11/13 06:12 PM
  Epyc 2 needs no frequency drop for 256-bit AVXjuanrga2018/11/13 04:15 AM
    Epyc 2 needs no frequency drop for 256-bit AVXhobel2018/11/13 09:40 AM
      Epyc 2 needs no frequency drop for 256-bit AVXjuanrga2018/11/13 01:30 PM
        Epyc 2 needs no frequency drop for 256-bit AVXhobel2018/11/14 01:33 AM
          Epyc 2 needs no frequency drop for 256-bit AVXjuanrga2018/11/14 04:20 AM
            Epyc 2 needs no frequency drop for 256-bit AVXhobel2018/11/14 05:31 AM
              Epyc 2 needs no frequency drop for 256-bit AVXjuanrga2018/11/14 11:17 AM
                Epyc 2 needs no frequency drop for 256-bit AVXhobel2018/11/15 04:18 AM
                  Epyc 2 needs no frequency drop for 256-bit AVXjuanrga2018/11/15 10:51 AM
                    Epyc 2 needs no frequency drop for 256-bit AVXhobel2018/11/15 11:45 PM
                      Epyc 2 needs no frequency drop for 256-bit AVXjuanrga2018/11/16 03:55 AM
                        Epyc 2 needs no frequency drop for 256-bit AVXhobel2018/11/16 04:26 AM
                          Epyc 2 needs no frequency drop for 256-bit AVXjuanrga2018/11/18 04:03 AM
                            Epyc 2 needs no frequency drop for 256-bit AVXTravis Downs2018/11/18 10:21 AM
                            Epyc 2 needs no frequency drop for 256-bit AVXhobel2018/11/19 12:07 AM
        No way downlocking memmory saves 15 watts of idle powerHeikki Kultala2018/11/15 08:24 AM
          No way downlocking memmory saves 15 watts of idle poweranon2018/11/15 09:48 AM
          No way downlocking memmory saves 15 watts of idle powerjuanrga2018/11/15 11:08 AM
  Epyc 2 needs no frequency drop for 256-bit AVXDavid Kanter2018/11/19 03:33 PM
    Epyc 2 needs no frequency drop for 256-bit AVXTravis Downs2018/11/19 03:41 PM
      Epyc 2 needs no frequency drop for 256-bit AVXFoo_2018/11/20 04:38 AM
        Epyc 2 needs no frequency drop for 256-bit AVXTravis Downs2018/11/21 04:29 PM
          Epyc 2 needs no frequency drop for 256-bit AVXAdrian2018/11/21 09:31 PM
            Epyc 2 needs no frequency drop for 256-bit AVXAdrian2018/11/22 01:00 AM
              Epyc 2 needs no frequency drop for 256-bit AVXTravis Downs2018/11/22 10:30 AM
                Epyc 2 needs no frequency drop for 256-bit AVXAdrian2018/11/22 12:17 PM
                Epyc 2 needs no frequency drop for 256-bit AVXDavid Hess2018/11/22 12:29 PM
                  Epyc 2 needs no frequency drop for 256-bit AVXTravis Downs2018/11/22 01:27 PM
                    Epyc 2 needs no frequency drop for 256-bit AVXDavid Hess2018/11/22 02:05 PM
                Epyc 2 needs no frequency drop for 256-bit AVXFoo_2018/11/22 02:10 PM
    Epyc 2 needs no frequency drop for 256-bit AVXBrett2018/11/20 02:27 AM
      Epyc 2 needs no frequency drop for 256-bit AVXMichael S2018/11/21 02:25 AM
        Epyc 2 needs no frequency drop for 256-bit AVXwumpus2018/11/21 06:04 AM
          Epyc 2 needs no frequency drop for 256-bit AVXAdrian2018/11/21 11:13 AM
            Epyc 2 needs no frequency drop for 256-bit AVXwumpus2018/11/22 07:53 AM
              The are "meddling" with Vega 20 coreHeikki Kultala2018/11/22 12:26 PM
                The are "meddling" with Vega 20 coreanon2018/11/22 01:19 PM
              Epyc 2 needs no frequency drop for 256-bit AVXDavid Hess2018/11/22 01:56 PM
                Epyc 2 needs no frequency drop for 256-bit AVXMontaray Jack2018/11/23 02:46 AM
              Epyc 2 needs no frequency drop for 256-bit AVXMontaray Jack2018/11/23 03:21 AM
        Peak vector length hitBrett2018/11/25 07:08 PM
          Peak vector length hitMichael S2018/11/26 01:48 AM
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