ARM announces A72

By: David Kanter (, February 8, 2015 1:39 am
Room: Moderated Discussions
Krait gets all this praise for being so power efficient but I have yet to see a real comparison with normalized
> performance on the same process and all that. All I've seen is comparisons where A15 uses more power (sometimes
> a lot more) while also performing better (sometimes a lot better).

Not on any vector workloads. The A15 had some terrible behavior when doing SIMD.

I repeat it constantly, but perf/W is
> not linear and these comparisons are meaningless. Reduce the clock speed on the A15 until it matches the
> performance on the Krait core and then do a fair measurement - of course, this will vary tremendously from
> benchmark to benchmark, especially since Krait appears to have some big glass jaws.

What do you think the glass jaws of Krait are?

> What we do know is this: despite your remarks that power management is "not so strong" in A57 Qualcomm
> still preferred to use it instead of a version of Krait that only added ARMv8 support, something
> I'm sure they could have done in time if it would have given them such an advantage.

I don't think so. I believe Qualcomm is only using ARM cores for their APs due to time to market constraints.

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TopicPosted ByDate
ARM announces A72Maynard Handley2015/02/03 12:36 PM
  ARM announces A72anon2015/02/03 01:53 PM
    ARM announces A72Hugo Décharnes2015/02/03 02:20 PM
      ARM announces A72juanrga2015/02/03 05:15 PM
        ARM announces A72Wilco2015/02/04 01:58 AM
          ARM announces A72Eric Bron2015/02/04 02:48 AM
            ARM announces A72none2015/02/04 03:24 AM
              ARM announces A72Eric Bron2015/02/04 03:42 AM
                ARM announces A72Exophase2015/02/04 08:01 AM
                  ARM announces A72Anon2015/02/04 08:35 AM
                    ARM announces A72Exophase2015/02/04 08:58 AM
                      ARM announces A72Groo2015/02/04 10:24 AM
                ARM Marketing, BS up to my earsDavid Kanter2015/02/04 11:51 AM
                  ARM Marketing, BS up to my earsMaynard Handley2015/02/04 02:59 PM
                    ARM Marketing, BS up to my earsDavid Kanter2015/02/04 03:21 PM
                  ARM Marketing, BS up to my earsGroo2015/02/04 03:30 PM
          ARM announces A72juanrga2015/02/04 05:23 AM
            ARM announces A72Wilco2015/02/04 04:01 PM
              ARM announces A72juanrga2015/02/04 05:06 PM
        ARM announces A72Anon2015/02/04 02:28 AM
          ARM announces A72juanrga2015/02/04 05:31 AM
            ARM announces A72Aaron Spink2015/02/04 07:49 AM
      ARM announces A72Ronald Maas2015/02/03 08:23 PM
        ARM announces A72Seni2015/02/04 01:19 AM
          ARM announces A72Maynard Handley2015/02/04 11:42 AM
            ARM announces A72Seni2015/02/04 01:33 PM
              ARM announces A72dmcq2015/02/04 01:57 PM
            ARM announces A72Ronald Maas2015/02/04 07:42 PM
        ARM announces A72anon2015/02/04 06:19 AM
          ARM announces A72Exophase2015/02/04 08:31 AM
            ARM announces A72David Kanter2015/02/04 11:25 AM
              ARM announces A72Exophase2015/02/04 02:33 PM
                ARM announces A72anon2015/02/04 11:27 PM
                  ARM announces A72 (fixed format)anon2015/02/04 11:29 PM
                  ARM announces A72Exophase2015/02/05 12:11 AM
                    ARM announces A72anon2015/02/05 01:02 AM
            ARM announces A72anon2015/02/04 06:57 PM
  ARM announces A72Wilco2015/02/03 02:39 PM
    ARM announces A72Maynard Handley2015/02/03 03:13 PM
      ARM announces A72anon2015/02/03 03:29 PM
      ARM announces A72Wilco2015/02/03 03:44 PM
    ARM announces A72David Kanter2015/02/04 10:56 AM
      ARM announces A72Peter Greenhalgh2015/02/04 11:56 AM
        ARM announces A72Aaron Spink2015/02/04 12:59 PM
          ARM announces A72Alberto2015/02/07 11:22 AM
            ARM announces A72Exophase2015/02/07 11:47 AM
              ARM announces A72Alberto2015/02/07 01:44 PM
                ARM announces A72Exophase2015/02/07 03:35 PM
                  ARM announces A72Alberto2015/02/08 02:09 AM
                    ARM announces A72Exophase2015/02/08 12:05 PM
              ARM announces A72David Kanter2015/02/08 01:39 AM
                ARM announces A72dmcq2015/02/08 05:14 AM
                  ARM announces A72Michael S2015/02/08 05:38 AM
                    ARM announces A72Gabriele Svelto2015/02/10 06:11 AM
                      ARM announces A72Jouni Osmala2015/02/10 12:24 PM
                        slit vs unifiedMichael S2015/02/10 02:57 PM
                          slit vs unifieddmcq2015/02/11 06:44 AM
                  ARM announces A72Doug S2015/02/08 10:00 AM
                ARM announces A72Exophase2015/02/08 11:57 AM
        ARM announces A72dmcq2015/02/04 02:10 PM
        ARM announces A72David Kanter2015/02/04 03:28 PM
      ARM announces A72Wilco2015/02/04 02:59 PM
        ARM announces A72Aaron Spink2015/02/04 10:31 PM
        Intel 32nm vs 14 nmMichael S2015/02/05 02:03 AM
          Intel 32nm vs 14 nmWilco2015/02/05 03:27 AM
            Intel 32nm vs 14 nmDavid Kanter2015/02/05 10:05 AM
              Intel 32nm vs 14 nmcarop2015/02/05 12:12 PM
                Normalize to drawn or effective width?David Kanter2015/02/05 12:45 PM
                  Normalize to drawn or effective width?carop2015/02/05 03:40 PM
                    Normalize to drawn or effective width?David Kanter2015/02/06 01:44 PM
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