Performance analysis laughable

Article: Medfield, Intel's x86 Phone Chip
By: David Kanter (, January 24, 2012 11:34 pm
Room: Moderated Discussions
IntelUser2000 ( on 1/24/12 wrote:
>David Kanter ( on 1/24/12 wrote:
>>So what is your estimate for the performance of Medfield on SPECint2000 relative to say, OMAP5, Tegra3 or S4?
>I agree with Wilco on this one. There's no way a single >core 1.6GHz Medfield will
>surpass similarly clocked dual core A15 in ANY benchmark.

I'd be very surprised if it did too. But I'm not sure what frequency we'll see and under what circumstances.

>If we assume the Sunspider benchmark represents real world >case, Medfield is anywhere
>from equal to 10% slower per clock compared to A9. Good >thing Medfield is clocked 30-60%(depending on Burst) >higher.

>That's on a single thread benchmark. However, the competition is dual core. Hyperthreading
>on Atoms do a lot, but dual cores do way more.


>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.

Generally HT adds about 20% power consumption, but you're saying it tends to add around 50-70% performance, so that's a fantastic trade-off. Given that info, I can see why they wouldn't bother with another core.

>Then maybe, thanks to Hyperthreading, 1.6GHz Medfield can >be on par with 1.2GHz
>A9 parts. Now you see why suggesting equivalence to higher clocked A15 parts are
>ridiculous. Assuming only 20% IPC gain, and 1.5GHz clock speed, the A15 part will
>have 25-30% advantage in single thread and about 50-60% in >multi-threads. Now most
>people are expecting IPC gains of 40%+.

What is the power consumption though? Essentially what does the curve of perf. vs. frequency look like?

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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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    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
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            Process numbersAlberto2012/01/26 09:29 AM
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