Cortex-A72 Technical Reference Manual

By: Alberto (git.delete@this.git.it), March 6, 2015 1:09 pm
Room: Moderated Discussions
Wilco (Wilco.Dijkstra.delete@this.ntlworld.com) on March 6, 2015 12:49 pm wrote:
> Alberto (git.delete@this.git.it) on March 6, 2015 10:45 am wrote:
> > Exophase (exophase.delete@this.gmail.com) on March 5, 2015 12:57 pm wrote:
> > > Alberto (git.delete@this.git.it) on March 5, 2015 11:06 am wrote:
> > > > Do you expected much from ARM?? This is only a minor refresh
> > > > useful in handset, a larger L2 could give better
> > > > responsiveness, less bus activity and some advantage on few bench suites so loved by tech sites.
> > > > So nearly all the advantage is in the new process and in a better power management, no breaking news.
> > > >
> > > > Qualcomm sports this core right now in the 600 serie, this say a lot about
> > > > the strategic utility of the custom core that we'll see in 820.
> > > >
> > > >
> > >
> > > You're making the mistake of thinking that they only changed those two things because
> > > that's all that's demonstrated in the TRM. ARM's TRMs today are very light on uarch details.
> > > While it does rule out some improvements there are many others that it does not.
> >
> > Sure you are right, still i don't think this is a "fast" cpu, in 620 is clocked at 1.8
> > Ghz and the flagship is 810 with a 2Ghz A57, i am pretty certain there is no trivial difference
> > between 620 and 810 for market differentiation. Strange enough apparently it looks "slower"
> > clock to clock than A57 to drop the power.
>
> It's obvious the 620 will outperform the 810 despite running at a lower frequency. QC
> just clocks it slow enough to avoid making their next-gen custom core look bad...

Obviously no. 620 will be out shortly looking Qualcomm site, likely is right now to OEMs.
810 will be top of the line since the beginning of the next year. 620 will be clearly much slower to justify the far higher price of 810 like "over the top" for the whole 2015.

>
> MediaTek has no such positioning issues and announced 2.4GHz
> A72's that will beat Apple A8 and Denver by a good margin.

This is a dream :).
Funny thing, Qualcomm has revealed what is A72 a year before its implementation on 16FF, a new edition of the concept of Qualcomm Krait, higher clock speeds (turbo ??) and lower IPC to save power......uuuuuu Silvermont !!! damn !!

>
> > A57 is a power hog by default.
>
> Sure, that's why Samsung puts quad-core 2.1GHz A57 in their phones rather than Krait. They obviously
> selected the worst power hog they could possibly find and then made the battery a lot smaller too
> because as we all know, as long as the frame is metallic, battery life doesn't matter.
>
> Wilco

The reason was to have more performance, not having the custom core fully developed....the -25% in power consumption of TSMC 20nm helped a bit the adventure :).

< Previous Post in ThreadNext Post in Thread >
TopicPosted ByDate
Cortex-A72 Technical Reference ManualRonald Maas2015/03/05 07:01 AM
  Cortex-A72 Technical Reference Manualdmcq2015/03/05 10:01 AM
  Cortex-A72 Technical Reference ManualAlberto2015/03/05 10:06 AM
    Cortex-A72 Technical Reference ManualExophase2015/03/05 11:57 AM
      Cortex-A72 Technical Reference ManualAlberto2015/03/06 09:45 AM
        Cortex-A72 Technical Reference ManualWilco2015/03/06 11:49 AM
          Cortex-A72 Technical Reference ManualAlberto2015/03/06 01:09 PM
            Cortex-A72 Technical Reference ManualWilco2015/03/07 08:37 AM
          Cortex-A72 Technical Reference Manualjuanrga2015/03/06 05:18 PM
    Cortex-A72 Technical Reference ManualHugo Décharnes2015/03/05 02:40 PM
      Cortex-A72 Technical Reference ManualWilco2015/03/05 03:28 PM
        Cortex-A72 Technical Reference ManualHugo Décharnes2015/03/05 11:32 PM
        Cortex-A72 Technical Reference ManualDavid Kanter2015/03/05 11:42 PM
          Cortex-A72 Technical Reference ManualHugo Décharnes2015/03/06 01:55 AM
            Cortex-A72 Technical Reference Manualnone2015/03/06 02:36 AM
              Cortex-A72 Technical Reference ManualHugo Décharnes2015/03/06 03:08 AM
                Cortex-A72 Technical Reference Manualnone2015/03/06 03:12 AM
                Cortex-A72 Technical Reference ManualWilco2015/03/06 03:39 AM
          Cortex-A72 Technical Reference ManualWilco2015/03/06 04:04 AM
            Cortex-A72 Technical Reference Manualnone2015/03/06 04:50 AM
              Cortex-A72 Technical Reference ManualWilco2015/03/07 08:26 AM
                Cortex-A72 Technical Reference Manualnone2015/03/09 12:10 AM
                  Cortex-A72 Technical Reference Manualdmcq2015/03/09 01:14 AM
                    Cortex-A72 Technical Reference Manualnone2015/03/09 01:53 AM
          Cortex-A72 Technical Reference ManualBrett2015/03/06 11:57 AM
            Cortex-A72 Technical Reference ManualKlimax2015/03/06 12:39 PM
            Cortex-A72 Technical Reference ManualExophase2015/03/06 01:22 PM
            Cortex-A72 Technical Reference ManualWilco2015/03/06 01:31 PM
              Cortex-A72 Technical Reference Manualjuanrga2015/03/06 05:22 PM
                Broadcom VulcanBrett2015/03/07 01:56 PM
                  Broadcom Vulcananon2015/03/07 04:01 PM
                    Broadcom VulcanAnon2015/03/07 05:43 PM
                      Broadcom VulcanBrett2015/03/07 08:10 PM
                        Broadcom VulcanMichael S2015/03/08 01:30 AM
                          Broadcom VulcanGabriele Svelto2015/03/08 03:55 AM
                    Broadcom VulcanHugo Décharnes2015/03/08 12:47 AM
                      Broadcom VulcanExophase2015/03/08 10:58 AM
                  Broadcom Vulcanjuanrga2015/03/07 06:06 PM
                    Broadcom VulcanBrett2015/03/07 08:26 PM
                      Broadcom Vulcanjuanrga2015/03/08 05:48 AM
                        Broadcom VulcanBrett2015/03/30 05:50 PM
                          Broadcom Vulcandmcq2015/03/31 03:33 AM
                  Broadcom VulcanDavid Kanter2015/03/08 01:46 AM
                    Broadcom VulcanGabriele Svelto2015/03/08 03:57 AM
                    Broadcom Vulcanjuanrga2015/03/08 06:12 AM
              Cortex-A72 Technical Reference ManualDavid Kanter2015/03/06 11:43 PM
                Cortex-A72 Technical Reference Manualjuanrga2015/03/07 05:16 AM
                Cortex-A72 Technical Reference ManualWilco2015/03/07 08:50 AM
                  Cortex-A72 Technical Reference ManualDavid Kanter2015/03/08 01:30 AM
                    Cortex-A72 Technical Reference ManualMichael S2015/03/08 03:14 AM
                    Cortex-A72 Technical Reference ManualHugo Décharnes2015/03/08 03:26 AM
                      Cortex-A72 Technical Reference Manualjuanrga2015/03/08 05:51 AM
                        Cortex-A72 Technical Reference ManualHugo Décharnes2015/03/08 06:08 AM
                    Cortex-A72 Technical Reference ManualKlimax2015/03/08 07:44 AM
                  Cortex-A72 Technical Reference ManualGabriele Svelto2015/03/08 03:01 AM
              Cortex-A72 Technical Reference Manualanon2015/03/07 10:41 AM
            Cortex-A72 Technical Reference ManualDavid Kanter2015/03/06 11:37 PM
              Cortex-A72 Technical Reference ManualExophase2015/03/06 11:45 PM
              Cortex-A72 Technical Reference ManualJouni Osmala2015/03/07 01:54 AM
              Cortex-A72 Technical Reference Manualhashhash2015/03/07 06:06 AM
      Cortex-A72 Technical Reference Manualnone2015/03/05 11:36 PM
        Cortex-A72 Technical Reference ManualHugo Décharnes2015/03/06 01:47 AM
          Cortex-A72 Technical Reference Manualnone2015/03/06 02:29 AM
            Cortex-A72 Technical Reference ManualHugo Décharnes2015/03/06 03:02 AM
        Cortex-A72 Technical Reference Manualjuanrga2015/03/06 08:38 AM
          Cortex-A72 Technical Reference ManualJouni Osmala2015/03/06 09:27 AM
      Cortex-A72 Technical Reference ManualAlberto2015/03/06 09:58 AM
        Cortex-A72 Technical Reference ManualExophase2015/03/06 10:52 AM
          Cortex-A72 Technical Reference ManualAlberto2015/03/06 02:30 PM
            Cortex-A72 Technical Reference Manualjuanrga2015/03/06 05:32 PM
            Cortex-A72 Technical Reference ManualRonald Maas2015/03/06 07:11 PM
              Cortex-A72 Technical Reference ManualAlberto2015/03/07 05:52 AM
                Cortex-A72 Technical Reference ManualRonald Maas2015/03/07 08:52 AM
  Cortex-A72 Technical Reference ManualNoSpammer2015/03/05 11:33 AM
  Add two more differences.Jouni Osmala2015/03/05 02:13 PM
Reply to this Topic
Name:
Email:
Topic:
Body: No Text
How do you spell avocado?