Performance analysis laughable

Article: Medfield, Intel's x86 Phone Chip
By: David Kanter (dkanter.delete@this.realworldtech.com), January 25, 2012 2:07 am
Room: Moderated Discussions
IntelUser2000 (Intel_user2000@yahoo.ca) on 1/25/12 wrote:
---------------------------
>David Kanter (dkanter@realworldtech.com) on 1/25/12 wrote:
>---------------------------
>>IntelUser2000 (Intel_user2000@yahoo.ca) on 1/24/12 wrote:
>
>>>I've seen >benchmarks of 2 core Atom
>>>with Hyperthreading disabled vs Hyperthreading enabled >single core Atom. The 2 core is 30 or so percent faster.
>>
>>OK. I'm not sure what that says about A9...actually honestly that tells me that
>>Intel made a really good choice in terms of hyperthreading.
>>
>
>It's that they need a combination of single thread performance(via clock speed
>for example) and Hyperthreading to match a dual A9. And >that A15 improves on clock and IPC.

No, I think you're missing the point. Intel's approach is better (assuming they can match 2T perf).

I'd ALWAYS rather have one core with higher frequency and equivalent parallel performance through MT. That's a much better solution than two cores which will be slower (in single threaded operation).

Now, if Intel's throughput is lower, then it's a question of how much (and how the single threaded performance compares). If Intel's throughput is 10% lower, but single threaded performance is 10% better, then I'd say go with Intel for almost any phone.

Of course, the reality is totally unclear because the benchmarks are so questionable.

>Though you have a point about process technology giving >limited improvents when
>designs are equal, A15 uses a new architecture.

Yes it does, but the architecture is mostly wider (which adds power). It is possible it's both wider and lower power, but I'd be very skeptical.

>Sandy Bridge offered both better performance and lower >power at same process as
>Clarkdale.

That's true.

>Core 2 Duo did that in 2006 versus Core Duo. A15 >chips >move to 28nm technology
>and move to a new architecture.

Was C2D lower power than Core Duo? I don't recall that well.

>Perhaps 70% is overkill but 40-50% should be possible, is >it not?

That depends on how much you get from process technology.

David
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Medfield article onlineDavid Kanter2012/01/23 01:51 PM
  server errorbakaneko2012/01/24 03:00 AM
    FixedDavid Kanter2012/01/24 04:02 AM
      FixedJoel2012/01/24 07:43 AM
      FixedRicardo B2012/01/24 11:25 AM
        FixedDavid Kanter2012/01/24 05:29 PM
      FixedGabriele Svelto2012/01/24 01:07 PM
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    Reference platform battery lifeDavid Kanter2012/01/27 10:09 AM
  Performance analysis laughableWilco2012/01/24 03:23 PM
    Performance analysis laughableDavid Kanter2012/01/24 05:19 PM
      Performance analysis laughableIntelUser20002012/01/24 07:30 PM
        Performance analysis laughableIntelUser20002012/01/24 07:32 PM
        Performance analysis laughableDavid Kanter2012/01/24 11:34 PM
          Performance analysis laughableIntelUser20002012/01/24 11:56 PM
            Performance analysis laughableDavid Kanter2012/01/25 02:07 AM
              Performance analysis laughableAlberto2012/01/25 12:54 PM
          Atom HT gainWilco2012/01/25 05:43 AM
            Atom HT gainIntelUser20002012/01/25 06:53 AM
              Atom HT gainnone2012/01/25 07:04 AM
                Atom HT gainIntelUser20002012/01/25 07:35 AM
            Atom HT gainFoo_2012/01/25 07:06 AM
      Performance analysis laughableWilco2012/01/24 08:21 PM
        Performance analysis laughableDavid Kanter2012/01/24 10:13 PM
          Performance analysis laughableWilco2012/01/25 04:30 AM
            Performance analysis laughablenone2012/01/25 06:14 AM
              Performance analysis laughableWilco2012/01/25 07:18 AM
                Performance analysis laughableobserver2012/01/26 04:17 AM
                  Performance analysis laughableWilco2012/01/26 06:25 AM
            Process numbersAlberto2012/01/26 09:29 AM
            Performance analysis laughableDavid Kanter2012/02/02 12:38 AM
          Performance analysis laughabletupper2012/01/25 04:27 PM
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