microbenchmark results

By: --- (---.delete@this.redheron.com), September 25, 2021 2:04 pm
Room: Moderated Discussions
Dummond D. Slow (mental.delete@this.protozoa.us) on September 25, 2021 12:52 pm wrote:
> Richard S (rsa73.delete@this.iinet.net.au) on September 25, 2021 1:51 am wrote:
> > --- (---.delete@this.redheron.com) on September 24, 2021 7:06 pm wrote:
> > >
> > > In other words, I'm not yet convinced that the A15 represents any sort of intrinsic slow-down in core design
> >
> > I must be the only person impressed with a 7%-11%'ish speedup in integer workloads
> > on what appears to be the same, or substantially similar process.
>
> If it is just due to a 200 and 250 MHc clockspeed boost, then not really, everybody can
> do that unless the previous generation was already all the way to the clock ceiling.
>
> The raised clock might have even been possible on the past generation possibly. Perhaps
> they just pushed the silicon into more uncomfortable spot on the voltage curve.

We'll have to see the more sophisticated analyses of reviewers like AnandTech.
But all indications are that you do Apple a disservice by claiming this is "merely" a 200MHz speed boost; it is a frequency boost yes, but apparently coupled to better energy efficiency.

A common theme through all reviews of the new iPhones is how much longer battery life they provide. Some of the specialized improvements might be the result of better functional DMA (especially the dramatically improved streaming video result) but across all reviewers one sees this same pattern of noticeably improved battery life.
Slightly more technical is the point I made that the GB5 MT result reflects not exactly a higher IPC small core but rather a SoC that is no longer thermally throttled even when all 6 cores are maxing out.

So yes, anyone can boost frequency. But doing so while reducing power, while not changing the process much, and not changing the micro-architecture much or at all, is rather less trivial!
TSMC's number for N5P vs N5 is 7% faster at iso-power. Apple seem to not wasted any of that process boost, and been able to improve various energy aspects of the SoC and (apparently) at least the thermal behavior of the cores at highest performance.

https://twitter.com/dylan522p/status/1438589502147211264

Given this apparent physical optimization, it will be interesting to see the size. Naive scaling would put it at 15/11.8*88 mm^2, ie 112 mm^2. N5P does not boast of process improved density. My expectation is we will see somewhat smaller than this 112 because the same physical optimization that allowed for lower energy can also allow for better process usage and density optimization. We'll see -- should have the chip size in a week or two.
Preliminary numbers (Tech Insights) suggest the chip size is 107.7mm^2, but I can't tell if that's their final number or an estimate based on a not-yet-decapped package;
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TopicPosted ByDate
Armv8.8-A and Armv9.3-Aanonymou52021/09/16 02:25 PM
  Armv8.8-A and Armv9.3-ADoug S2021/09/16 09:57 PM
    Armv8.8-A and Armv9.3-ABrett2021/09/16 10:32 PM
      Armv8.8-A and Armv9.3-Aanon2021/09/16 10:55 PM
        Armv8.8-A and Armv9.3-Anone2021/09/16 11:51 PM
      Armv8.8-A and Armv9.3-AJörn Engel2021/09/17 04:42 AM
        Armv8.8-A and Armv9.3-AMichael S2021/09/17 06:48 AM
          Armv8.8-A and Armv9.3-AJörn Engel2021/09/18 01:01 PM
            Armv8.8-A and Armv9.3-AMichael S2021/09/18 02:58 PM
              microbenchmark resultsMichael S2021/09/19 03:46 PM
                microbenchmark source codeMichael S2021/09/19 03:58 PM
                  microbenchmark source code-.-2021/09/20 03:49 PM
                    microbenchmark source codeMichael S2021/09/21 09:17 AM
                      microbenchmark source code-.-2021/09/21 03:33 PM
                        microbenchmark source codeMichael S2021/09/21 05:05 PM
                microbenchmark resultsAnon2021/09/19 04:32 PM
                  microbenchmark resultsJörn Engel2021/09/19 07:46 PM
                    microbenchmark resultsdmcq2021/09/20 01:19 AM
                      microbenchmark resultsMichael S2021/09/20 04:12 AM
                      microbenchmark results-.-2021/09/20 03:44 PM
                        microbenchmark resultsMichael S2021/09/21 09:23 AM
                          microbenchmark results-.-2021/09/21 03:35 PM
                            microbenchmark resultsAndrey2021/09/21 04:25 PM
                              I agree (NT)Michael S2021/09/21 05:07 PM
                              microbenchmark results-.-2021/09/22 04:56 PM
                                microbenchmark resultsMichael S2021/09/23 05:11 AM
                                  microbenchmark resultsdmcq2021/09/23 06:53 AM
                                  microbenchmark resultsAndrey2021/09/23 09:20 AM
                                microbenchmark resultsAndrey2021/09/23 09:11 AM
                                  microbenchmark results-.-2021/09/23 07:01 PM
                                    microbenchmark resultsSimon Farnsworth2021/09/24 01:47 AM
                                      microbenchmark results-.-2021/09/24 05:00 PM
                                    microbenchmark resultsAndrey2021/09/24 07:29 AM
                                      microbenchmark resultsdmcq2021/09/24 12:05 PM
                                        microbenchmark resultsDoug S2021/09/24 01:12 PM
                                          microbenchmark results---2021/09/24 06:06 PM
                                            microbenchmark resultsDoug S2021/09/24 10:46 PM
                                              microbenchmark results---2021/09/25 08:56 AM
                                                microbenchmark resultsJukka Larja2021/09/26 01:01 AM
                                                microbenchmark resultsDoug S2021/09/26 08:41 AM
                                                  microbenchmark resultsdmcq2021/09/26 12:37 PM
                                                    microbenchmark resultsDoug S2021/09/27 09:32 AM
                                                      microbenchmark resultsdmcq2021/09/28 06:56 AM
                                              microbenchmark resultsDummond D. Slow2021/09/25 11:49 AM
                                                microbenchmark resultsBrett2021/09/25 02:31 PM
                                              microbenchmark resultsdmcq2021/09/25 11:51 AM
                                                microbenchmark resultsDoug S2021/09/26 08:45 AM
                                            microbenchmark resultsRichard S2021/09/25 12:51 AM
                                              microbenchmark resultsDummond D. Slow2021/09/25 11:52 AM
                                                microbenchmark results---2021/09/25 02:04 PM
                                      SVE alignment with non power-of-2 widths-.-2021/09/24 05:10 PM
                                        SVE alignment with non power-of-2 widthsAndrey2021/09/25 03:46 AM
                                          SVE alignment with non power-of-2 widths-.-2021/09/25 04:35 PM
                                          SVE alignment with non power-of-2 widthsKevin G2021/09/27 08:46 AM
                                            SVE alignment with non power-of-2 widths-.-2021/09/27 08:06 PM
                                              SVE alignment with non power-of-2 widthsJukka Larja2021/09/28 05:37 AM
                                                SVE alignment with non power-of-2 widthsAndrey2021/09/28 11:12 AM
                                                  SVE alignment with non power-of-2 widthsdmcq2021/09/28 01:29 PM
                                                SVE alignment with non power-of-2 widths-.-2021/09/28 05:37 PM
                                                  SVE alignment with non power-of-2 widthsJukka Larja2021/09/29 05:50 AM
                    microbenchmark results---2021/09/20 06:11 AM
                    microbenchmark resultsJörn Engel2021/09/23 04:10 AM
                      microbenchmark resultsMichael S2021/09/23 04:55 AM
                        microbenchmark resultsJörn Engel2021/09/23 08:24 AM
                          microbenchmark resultsRoyi2021/09/26 03:25 PM
                      microbenchmark resultsdmcq2021/09/23 09:42 AM
                        microbenchmark results---2021/09/23 10:53 AM
                      microbenchmark resultsanon22021/09/23 01:40 PM
                microbenchmark results: Zen 3Adrian2021/09/22 12:57 AM
                  microbenchmark results: Zen 3Adrian2021/09/22 01:08 AM
                    microbenchmark results: Zen 3Michael S2021/09/22 04:48 AM
                      microbenchmark results: Zen 3Adrian2021/09/22 05:05 AM
        Armv8.8-A and Armv9.3-AKonrad Schwarz2021/09/28 04:45 AM
    Armv8.8-A and Armv9.3-ALinus Torvalds2021/09/17 07:59 AM
      Armv8.8-A and Armv9.3-ADoug S2021/09/17 10:35 AM
        Armv8.8-A and Armv9.3-Anksingh2021/09/17 11:23 AM
          Armv8.8-A and Armv9.3-ADoug S2021/09/17 01:35 PM
            Armv8.8-A and Armv9.3-AKonrad Schwarz2021/10/15 05:23 AM
              Armv8.8-A and Armv9.3-Arwessel2021/10/15 05:49 AM
        Armv8.8-A and Armv9.3-AAdrian2021/09/17 10:07 PM
          Armv8.8-A and Armv9.3-ADoug S2021/09/18 06:34 AM
            Armv8.8-A and Armv9.3-AAdrian2021/09/18 06:38 AM
      Armv8.8-A and Armv9.3-Ablaine2021/09/18 09:37 AM
      Armv8.8-A and Armv9.3-ABrett2021/09/19 12:06 PM
        Armv8.8-A and Armv9.3-Admcq2021/09/19 12:36 PM
        Armv8.8-A and Armv9.3-ADoug S2021/09/19 05:07 PM
          Armv8.8-A and Armv9.3-A - movesdmcq2021/09/28 08:54 AM
            Armv8.8-A and Armv9.3-A - movesDoug S2021/09/28 12:57 PM
              Armv8.8-A and Armv9.3-A - movesdmcq2021/09/28 01:21 PM
                Armv8.8-A and Armv9.3-A - movesNoSpammer2021/09/29 02:53 AM
                  Armv8.8-A and Armv9.3-A - movesrwessel2021/09/29 05:55 AM
                    Armv8.8-A and Armv9.3-A - movesdmcq2021/09/29 06:53 AM
                      Armv8.8-A and Armv9.3-A - movesrwessel2021/09/29 10:35 AM
                        Armv8.8-A and Armv9.3-A - movesdmcq2021/09/29 12:44 PM
                          Armv8.8-A and Armv9.3-A - movesrwessel2021/09/29 12:58 PM
                            Armv8.8-A and Armv9.3-A - movesdmcq2021/09/29 02:52 PM
                              Armv8.8-A and Armv9.3-A - movesrwessel2021/09/29 05:36 PM
                              Armv8.8-A and Armv9.3-A - movesAndrey2021/09/29 06:58 PM
                    Armv8.8-A and Armv9.3-A - movesDoug S2021/09/29 09:10 AM
                      Armv8.8-A and Armv9.3-A - movesrwessel2021/09/29 10:30 AM
                        Armv8.8-A and Armv9.3-A - movesDoug S2021/09/29 09:02 PM
                          Armv8.8-A and Armv9.3-A - movesrwessel2021/09/29 10:22 PM
                            Armv8.8-A and Armv9.3-A - movesMark Roulo2021/09/30 06:37 AM
                              Armv8.8-A and Armv9.3-A - movesrwessel2021/09/30 07:02 AM
                                Did they publish a full description? (NT)Michael S2021/09/30 07:12 AM
                                  Did they publish a full description?rwessel2021/09/30 08:18 AM
                                    Did they publish a full description?Michael S2021/09/30 09:24 AM
                                      Did they publish a full description?rwessel2021/09/30 09:42 AM
                                    Did they publish a full description?Adrian2021/09/30 11:22 PM
                                  Do we even okiw it's three instructions per move?Carson2021/09/30 09:28 PM
                                    Do we even okiw it's three instructions per move?Adrian2021/09/30 11:27 PM
                                    Do we even okiw it's three instructions per move?rwessel2021/10/01 03:19 AM
                            Armv8.8-A and Armv9.3-A - movesDoug S2021/09/30 08:48 AM
                              Armv8.8-A and Armv9.3-A - movesrwessel2021/09/30 09:39 AM
                                Armv8.8-A and Armv9.3-A - movesDoug S2021/09/30 01:56 PM
                                  Armv8.8-A and Armv9.3-A - movesrwessel2021/09/30 04:20 PM
                                    Armv8.8-A and Armv9.3-A - movesdmcq2021/10/01 03:38 AM
                                      Armv8.8-A and Armv9.3-A - movesMichael S2021/10/01 04:04 AM
                                        Armv8.8-A and Armv9.3-A - movesLinus Torvalds2021/10/01 10:01 AM
                                          memcpy - instruction cracking vs DMArpg2021/10/02 01:51 AM
                                            memcpy - instruction cracking vs DMAAdrian2021/10/02 02:45 AM
                                              memcpy - instruction cracking vs DMADoug S2021/10/02 08:47 AM
                                                memcpy - instruction cracking vs DMAAdrian2021/10/02 09:15 AM
                                                memcpy - instruction cracking vs DMArwessel2021/10/02 10:37 AM
                                                  memcpy - instruction cracking vs DMADoug S2021/10/02 05:49 PM
                                            memcpy - instruction cracking vs DMALinus Torvalds2021/10/02 09:43 AM
                                              memcpy - instruction cracking vs DMAdmcq2021/10/02 10:32 AM
                                              memcpy - instruction cracking vs DMABrett2021/10/02 10:45 AM
                                              memcpy - instruction cracking vs DMA---2021/10/02 02:03 PM
                                                memcpy - instruction cracking vs DMA---2021/10/02 02:12 PM
                                                  Moving copy to DRAM doesn't help for small copiesMark Roulo2021/10/02 02:59 PM
                                                    Moving copy to DRAM doesn't help for small copies---2021/10/02 06:32 PM
                                                      Moving copy to DRAM doesn't help for small copiesMichael S2021/10/03 12:40 AM
                                                        Moving copy to DRAM doesn't help for small copiesDoug S2021/10/03 09:09 AM
                                                          Moving copy to DRAM doesn't help for small copiesrwessel2021/10/03 09:51 AM
                                                          Moving copy to DRAM doesn't help for small copiesLinus Torvalds2021/10/03 10:09 AM
                                                            How about environments such as Java?Mark Roulo2021/10/03 11:41 AM
                                                              How about environments such as Java?rwessel2021/10/03 11:49 AM
                                                                How about environments such as Java?Mark Roulo2021/10/03 12:22 PM
                                                              How about environments such as Java?anon22021/10/03 06:58 PM
                                                                How about environments such as Java?Etienne Lorrain2021/10/04 04:08 AM
                                                                  Apart from "It depends" there is no short answer. (NT)Michael S2021/10/04 04:30 AM
                                                                  How about environments such as Java?Andrey2021/10/04 05:04 AM
                                                                  How about environments such as Java?anon22021/10/04 05:32 AM
                                                                How about environments such as Java?Mark Roulo2021/10/04 06:31 AM
                                                                How about environments such as Java?---2021/10/04 08:41 AM
                                                                  How about environments such as Java?Doug S2021/10/04 09:23 AM
                                                                    How about environments such as Java?Andrey2021/10/04 11:14 AM
                                                                      How about environments such as Java?Doug S2021/10/04 12:20 PM
                                                                  How about environments such as Java?anon22021/10/04 01:23 PM
                                                                  How about environments such as Java?rwessel2021/10/04 03:54 PM
                                                            Moving copy to DRAM doesn't help for small copiesJörn Engel2021/10/04 04:52 AM
                                                            Early software zeroing !=== early hardware zeroingPaul A. Clayton2021/10/05 10:19 AM
                                                              Early software zeroing !=== early hardware zeroingDoug S2021/10/05 11:21 AM
                                                memcpy - instruction cracking vs DMABrendan2021/10/02 03:53 PM
                                                  memcpy - instruction cracking vs DMALinus Torvalds2021/10/03 09:48 AM
                                                    memcpy - instruction cracking vs DMAdmcq2021/10/03 12:54 PM
                                              memcpy - instruction cracking vs DMAYuhong Bao2021/10/03 12:30 AM
                                                memcpy - instruction cracking vs DMADavid Hess2021/10/05 04:19 PM
                                                  memcpy - instruction cracking vs DMAAdrian2021/10/05 10:28 PM
                                                    memcpy - instruction cracking vs DMAEtienne Lorrain2021/10/06 01:24 AM
                                                    memcpy - instruction cracking vs DMArwessel2021/10/06 02:38 AM
                                                      memcpy - instruction cracking vs DMAAdrian2021/10/06 03:04 AM
                                                        memcpy - instruction cracking vs DMArwessel2021/10/06 04:59 AM
                                                    memcpy - instruction cracking vs DMA---2021/10/06 08:07 AM
                                                      memcpy - instruction cracking vs DMAAndrey2021/10/06 01:59 PM
                                                    memcpy - instruction cracking vs DMAgallier22021/10/06 10:06 PM
                                                      memcpy - instruction cracking vs DMAAdrian2021/10/06 10:59 PM
                                              memcpy - instruction cracking vs DMAMichael S2021/10/03 12:51 AM
                                                memcpy - instruction cracking vs DMArwessel2021/10/03 04:06 AM
                                                  memcpy - instruction cracking vs DMAMichael S2021/10/03 04:24 AM
                                                    memcpy - instruction cracking vs DMAMatt Sayler2021/10/03 07:02 AM
                                                    memcpy - instruction cracking vs DMADoug S2021/10/03 09:14 AM
                                      Armv8.8-A and Armv9.3-A - movesrwessel2021/10/01 04:10 AM
                                        Armv8.8-A and Armv9.3-A - movesEtienne Lorrain2021/10/01 06:55 AM
                                          Armv8.8-A and Armv9.3-A - movesrwessel2021/10/01 07:14 AM
                                            Armv8.8-A and Armv9.3-A - movesDoug S2021/10/01 10:17 AM
                                              Armv8.8-A and Armv9.3-A - movesrwessel2021/10/02 03:57 AM
  Armv8.8-A and Armv9.3-Anone2021/10/13 05:06 AM
    Armv8.8-A and Armv9.3-AAdrian2021/10/13 05:22 AM
      Armv8.8-A and Armv9.3-ADoug S2021/10/13 08:01 AM
        Armv8.8-A and Armv9.3-Admcq2021/10/13 09:17 AM
          Armv8.8-A and Armv9.3-Anone2021/10/13 09:26 PM
            Armv8.8-A and Armv9.3-Admcq2021/10/14 07:22 AM
    Armv8.8-A and Armv9.3-Arwessel2021/10/14 08:01 AM
      Armv8.8-A and Armv9.3-AAnon2021/10/14 10:08 AM
        Armv8.8-A and Armv9.3-AMichael S2021/10/14 12:25 PM
      Armv8.8-A and Armv9.3-ADoug S2021/10/14 10:18 AM
        Armv8.8-A and Armv9.3-Arwessel2021/10/14 06:07 PM
          Armv8.8-A and Armv9.3-ADoug S2021/10/14 09:23 PM
            Armv8.8-A and Armv9.3-Admcq2021/10/15 12:41 AM
              Armv8.8-A and Armv9.3-AGabriele Svelto2021/10/15 04:07 AM
            Armv8.8-A and Armv9.3-Arwessel2021/10/15 03:49 AM
              Armv8.8-A and Armv9.3-ADoug S2021/10/15 09:44 AM
                Armv8.8-A and Armv9.3-Ame2021/10/15 05:34 PM
                  Armv8.8-A and Armv9.3-ADoug S2021/10/16 08:47 AM
                    Armv8.8-A and Armv9.3-Ame2021/10/17 04:19 AM
                      Armv8.8-A and Armv9.3-ADoug S2021/10/17 09:17 AM
                        Armv8.8-A and Armv9.3-Ame2021/10/17 11:31 AM
                          Armv8.8-A and Armv9.3-ADoug S2021/10/17 12:33 PM
                            Armv8.8-A and Armv9.3-AzArchJon2021/10/18 09:35 AM
                              Armv8.8-A and Armv9.3-ADoug S2021/10/18 01:35 PM
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