Neat die area comparison image

By: anon (spam.delete.delete@this.this.spam.com), October 26, 2016 3:32 am
Room: Moderated Discussions
David Hess (davidwhess.delete@this.gmail.com) on October 25, 2016 9:59 pm wrote:
> Maynard Handley (name99.delete@this.name99.org) on October 24, 2016 4:27 pm wrote:
> >
> > Beyond this, the naive model suggested by David Hess assumes the A10 is clocked at maximum frequency for
> > this design. This is highly unlikely. We'll see a higher frequency limit when the A10X ships. You all
> > know the frequency I've suggested that could be clocked
> > at, based simply on the A9X vs A9 frequency scaling,
> > and what TSMC has said about their 10nm process, but scaling that to beyond 4GHz it seems reasonable to
> > say that Apple's current design would engender something more like 5 rather than 8 clocks.
>
> Our discussion is necessarily vague because we lack implementation details.
>
> I am assuming that the A10 makes maximum use of its longer cycle time either to use
> as many logic levels as possible between stages or to use the slowest logic available
> between each stage to save power. Doing otherwise would degrade performance by either
> lowering the amount of work done per cycle or increasing the power per cycle.
>
> The alternative is that Apple designed a 4 GHz processor but only operates it at 2 GHz do to power constraints.
> They could do that but a dedicated 2 GHz design would be higher performance or lower power or both.
>

The truth most likely lies somewhere in between.
Given the A10's area and that large portions of Broadwell/Skylake's SIMD units lie dormant most of the time just halving the clockspeed wouldn't be nearly enough to explain the difference in power consumption. I'm sure Apple is not maxing out the Voltage, just like Intel won't on mobile when they don't have 15-20W power budget per core. Tau is Voltage dependent though. So even on fairly similar nodes half the clockrate most likely doesn't mean twice the available logic delay.

If I had to guess I'd say the A10 should have around 30% more FO4 delays per cycle available, but definitely nowhere near 100%.
< Previous Post in ThreadNext Post in Thread >
TopicPosted ByDate
Neat die area comparison imageRob2016/10/21 05:39 PM
  Neat die area comparison imageanonymou52016/10/21 06:44 PM
    Neat die area comparison imageMr. Camel2016/10/22 04:58 AM
      Neat die area comparison imageHeikki Kultala2016/10/22 05:19 AM
        Neat die area comparison imageMr. Camel2016/10/22 07:10 AM
          Neat die area comparison imageMr. Camel2016/10/22 07:15 AM
          different caches...Heikki Kultala2016/10/22 08:29 AM
            Broadwell includes LLC, just for comparisionanon2016/10/22 08:52 AM
              Broadwell includes LLC, just for comparisionjuanrga2016/10/23 06:09 AM
                Broadwell includes LLC, just for comparisionanon2016/10/23 07:25 AM
                  Broadwell includes LLC, just for comparisionjuanrga2016/10/25 09:57 AM
                    Broadwell includes LLC, just for comparisionSimon Farnsworth2016/10/25 11:03 AM
                      Broadwell includes LLC, just for comparisionjuanrga2016/10/28 02:02 AM
                        Broadwell includes LLC, just for comparisionanon2016/10/28 04:13 AM
                          Broadwell includes LLC, just for comparisionjuanrga2016/10/29 09:47 PM
                            Broadwell includes LLC, just for comparisionTravis2016/10/30 06:34 PM
                              Broadwell includes LLC, just for comparisionjuanrga2016/10/31 04:35 AM
                                Broadwell includes LLC, just for comparisionSimon Farnsworth2016/10/31 04:42 AM
                                Broadwell includes LLC, just for comparisionanon2016/11/01 12:56 PM
                                  Broadwell includes LLC, just for comparisionMaynard Handley2016/11/01 01:37 PM
                                    Broadwell includes LLC, just for comparisionanon2016/11/01 04:22 PM
                                      Broadwell includes LLC, just for comparisionMaynard Handley2016/11/01 07:30 PM
                                        Broadwell includes LLC, just for comparisionanon2016/11/02 06:15 AM
                                          Broadwell includes LLC, just for comparisionMaynard Handley2016/11/02 09:23 AM
                                            Broadwell includes LLC, just for comparisionanon2016/11/02 11:50 AM
                                  Broadwell includes LLC, just for comparisionSimon Farnsworth2016/11/02 02:48 AM
                        Broadwell includes LLC, just for comparisionSimon Farnsworth2016/10/28 06:19 AM
                          Broadwell includes LLC, just for comparisionjuanrga2016/10/29 10:15 PM
                            Broadwell includes LLC, just for comparisionSimon Farnsworth2016/10/30 12:31 PM
                        Broadwell includes LLC, just for comparisionRicardo B2016/10/29 05:30 PM
                    underclocked is different than designed for low clock speedHeikki Kultala2016/10/25 11:47 PM
                      underclocked is different than designed for low clock speedMaynard Handley2016/10/26 10:07 AM
                      That wasn't the pointjuanrga2016/10/28 02:15 AM
                        Even without the point you have invalid comparisonHeikki Kultala2016/10/28 09:03 AM
                          8 wide vs 6 widejuanrga2016/10/29 10:41 PM
                            8 wide vs 6 wideWilco2016/10/30 05:00 AM
                              8 wide vs 6 wideDoug S2016/10/30 12:20 PM
                                8 wide vs 6 wideWilco2016/10/30 01:12 PM
                                8 wide vs 6 widejuanrga2016/10/30 02:56 PM
                                  8 wide vs 6 wideTravis2016/10/30 07:13 PM
                                    8 wide vs 6 widejuanrga2016/10/31 04:55 AM
                                      8 wide vs 6 wideanon2016/11/01 01:00 PM
                                        SoftMachinesnone2016/11/02 03:57 AM
                                          SoftMachinesDavid Kanter2016/11/02 08:53 AM
                                        8 wide vs 6 widejuanrga2016/11/03 12:35 PM
                                          8 wide vs 6 wideWilco2016/11/03 02:13 PM
                                            8 wide vs 6 widejuanrga2016/11/03 07:35 PM
                                              8 wide vs 6 wideWilco2016/11/04 01:27 PM
                                                8 wide vs 6 widejuanrga2016/11/04 06:08 PM
                                                  8 wide vs 6 wideWilco2016/11/06 04:52 AM
                                                    8 wide vs 6 widejuanrga2016/11/06 04:56 PM
                                                      8 wide vs 6 wideWilco2016/11/07 04:25 AM
                                              8 wide vs 6 wideAaron Spink2016/11/04 04:08 PM
                                                8 wide vs 6 widejuanrga2016/11/04 06:10 PM
                                            Dunning-Krueger effectHeikki Kultala2016/11/04 03:22 AM
                                              Dunning-Krueger effectitsmydamnation2016/11/04 02:48 PM
                                          8 wide vs 6 wideanon2016/11/04 03:38 AM
                                            8 wide vs 6 widejuanrga2016/11/04 05:05 AM
                                              8 wide vs 6 wideanon2016/11/04 06:12 AM
                                                8 wide vs 6 wideWilco2016/11/04 01:12 PM
                                                  8 wide vs 6 wideanon2016/11/04 02:54 PM
                                                    8 wide vs 6 widejuanrga2016/11/04 05:34 PM
                                                      8 wide vs 6 wideanon2016/11/05 02:14 AM
                                                  8 wide vs 6 widejuanrga2016/11/04 05:39 PM
                                                    8 wide vs 6 wideWilco2016/11/06 05:15 AM
                                                      8 wide vs 6 widejuanrga2016/11/06 05:06 PM
                                                        8 wide vs 6 wideWilco2016/11/07 03:45 AM
                                                          8 wide vs 6 wideDavid Kanter2016/11/07 08:43 PM
                                                            8 wide vs 6 wideWilco2016/11/08 03:57 AM
                                                          8 wide vs 6 widejuanrga2016/11/14 12:12 PM
                                                            8 wide vs 6 wideWilco2016/11/14 04:53 PM
                                                              8 wide vs 6 widedmcq2016/11/15 03:17 AM
                                                                8 wide vs 6 wideWilco2016/11/15 03:43 AM
                                                                  8 wide vs 6 widedmcq2016/11/15 04:28 AM
                                                                  1 µop per instruction is not necessaryPaul A. Clayton2016/11/17 12:09 PM
                                                              8 wide vs 6 widejuanrga2016/11/20 06:56 AM
                                                                8 wide vs 6 wideWilco2016/11/21 05:54 PM
                                                                  8 wide vs 6 widejuanrga2016/11/22 08:49 AM
                                                                    8 wide vs 6 wideWilco2016/11/22 03:25 PM
                                  8 wide vs 6 wideWilco2016/10/31 03:03 AM
                              Skylake can retire 8 uopsDavid Kanter2016/10/31 12:41 AM
                                Skylake can retire 8 uopsjuanrga2016/10/31 04:15 AM
                                  Skylake can retire 8 uopsAlberto2016/11/04 07:22 AM
                            8 wide vs 6 wide bogus numbersHeikki Kultala2016/10/30 06:25 AM
                    Broadwell includes LLC, just for comparisionanon2016/10/26 03:10 AM
                      Pushing the hidden agendajuanrga2016/10/28 03:11 AM
                        Pushing the hidden agendaanon2016/10/28 04:35 AM
      Neat die area comparison imageDavid Hess2016/10/22 01:26 PM
        Neat die area comparison imageanon22016/10/22 05:20 PM
          Neat die area comparison imageDavid Hess2016/10/22 10:31 PM
            Neat die area comparison imageanon22016/10/23 01:50 AM
        Neat die area comparison imageTravis2016/10/24 01:26 PM
          Neat die area comparison imageMaynard Handley2016/10/24 04:27 PM
            Neat die area comparison imagejuanrga2016/10/25 10:02 AM
            Neat die area comparison imageDavid Hess2016/10/25 09:59 PM
              Neat die area comparison imageTravis2016/10/25 10:22 PM
                Neat die area comparison imageDavid Hess2016/10/25 10:37 PM
                  Neat die area comparison imageTravis2016/10/30 06:09 PM
              Neat die area comparison imageGabriele Svelto2016/10/26 02:23 AM
                Neat die area comparison imageDoug S2016/10/26 08:17 AM
                  Neat die area comparison imageJukka Larja2016/10/27 09:28 AM
              Neat die area comparison imageanon2016/10/26 03:32 AM
      Neat die area comparison imagejuanrga2016/10/23 06:29 AM
    Neat die area comparison imageMatthias Waldhauer2016/10/22 06:12 AM
  Neat die area comparison imagejuanrga2016/10/23 05:44 AM
  Neat die area comparison imageGabriele Svelto2016/10/24 02:17 AM
Reply to this Topic
Name:
Email:
Topic:
Body: No Text
How do you spell avocado?