Performance analysis laughable

Article: Medfield, Intel's x86 Phone Chip
By: David Kanter (dkanter.delete@this.realworldtech.com), January 24, 2012 5:19 pm
Room: Moderated Discussions
Wilco (Wilco.Dijkstra@ntlworld.com) on 1/24/12 wrote:
---------------------------
>David Kanter (dkanter@realworldtech.com) on 1/23/12 wrote:
>---------------------------
>
>"Realistically, Medfield will not have a decisive performance advantage over platforms
>like TI’s OMAP5 or the Snapdragon S4. At best, Medfield will be slightly ahead of
>the competition; but in many cases Intel’s performance may >lag by 10-30%."

Actually, I updated the article...the new language you might find more reasonable.

>I can't believe how anyone could seriously suggest that Medfield will be competitive
>or even have a performance advantage over 1.5-2GHz dual core Krait or A15, especially
>given the fact that a 1GHz A9 outperforms an 1.6GHz Atom.

We've been over this before...there's no way that an A9 has a 30-40% advantage in terms of effective IPC. Most A9s have a crappy memory hierarchy and lose in a variety of benchmarks.

>Even in the few cases where x86 software is more finetuned, ie. JIT compilation, the unreleased Medfield shows no advantage over shipping mobiles: http://androidandme.com/2012/01/news/intel-medfield-vs-nvidia-tegra-3-performance-preview/

>Assuming there are no further JIT improvements on the ARM side (unlikely), at the
>end of 2012 Medfield will be 50% slower on Caffeinemark. And that is Intel's best
>benchmark... Medfield will do far worse on everything else, >especially on mulithreading.

So what is your estimate for the performance of Medfield on SPECint2000 relative to say, OMAP5, Tegra3 or S4?

>So how could you possibly justify the claim that a 1.6GHz ?2-way in-order single
>core is faster or only a little slower than a 2GHz 3-way >OoO dual core?

Because the performance gains for ARM licensees are limited by power consumption. You don't get 70% more performance while still having something recognizable as a cell phone.

I'm willing to accept 30% higher performance at the same power consumption, although that sounds generous.

David
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TopicPosted ByDate
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
        FixedDavid Kanter2012/01/24 05:30 PM
  Reference platform battery lifeDoug Siebert2012/01/24 02:03 PM
    standby timeFoo_2012/01/25 06:58 AM
      standby timeAnon2012/01/26 03:42 AM
        standby timeFoo_2012/01/26 04:02 AM
          standby timeDoug Siebert2012/01/26 12:39 PM
            standby timeAnon2012/01/26 01:22 PM
              standby timeanon2012/01/26 02:08 PM
                standby timeAnon2012/01/26 06:03 PM
                  standby timeanon2012/01/26 08:57 PM
                    standby timeanon2012/01/26 09:01 PM
                    standby timeAnon2012/01/27 09:32 PM
                standby timeDoug Siebert2012/01/27 02:15 PM
                  standby timeanon2012/01/27 02:41 PM
    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
            Performance analysis laughableLinus Torvalds2012/01/25 08:37 PM
              Performance analysis laughableDoug Siebert2012/01/26 02:12 PM
  Medfield article onlineAndreas2012/01/25 03:10 AM
    Medfield article onlineAlberto2012/01/25 09:44 AM
    Medfield article onlineIntelUser20002012/01/25 10:24 AM
    Medfield article onlineDavid Kanter2012/01/25 09:58 PM
      Medfield article onlineDoug Siebert2012/01/26 01:20 PM
        Medfield article onlineEric2012/01/26 06:10 PM
          Medfield article onlineDoug Siebert2012/01/27 02:40 PM
  64-bitIngeneer2012/01/25 09:28 AM
    64-bitFoo_2012/01/25 10:23 AM
      64-bitIngeneer2012/01/25 02:34 PM
        64-bitUngo2012/01/25 04:08 PM
          64-bitEduardoS2012/01/26 12:55 PM
  Saltwell memcpySHK2012/01/26 02:41 AM
  Medfield WiFi & BluetoothRob Thorpe2012/01/26 03:09 AM
    Medfield WiFi & BluetoothDavid Kanter2012/01/27 05:54 PM
      Medfield WiFi & BluetoothRob Thorpe2012/01/28 02:22 PM
  Medfield article online (NT)Anil2012/01/26 05:57 PM
  Medfield article onlineAnil2012/01/26 06:11 PM
    Medfield article onlineMr. Camel2012/01/26 06:26 PM
    Medfield article onlinenone2012/01/27 01:41 AM
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