Intentionally picking a competitors slow part is cheating ...

By: Michael S (already5chosen.delete@this.yahoo.com), January 13, 2015 10:01 am
Room: Moderated Discussions
coppice (coppice.delete@this.dis.org) on January 13, 2015 9:44 am wrote:
> Michael S (already5chosen.delete@this.yahoo.com) on January 13, 2015 7:53 am wrote:
> > coppice (coppice.delete@this.dis.org) on January 12, 2015 9:47 pm wrote:
> > > I forgot that the Intel chips also seemed to take considerably
> > > more power than the Denver to do the same work.
> > >
> >
> > Do you know it or do you believe it?
> > The same question goes for your above statement about relative die sizes.
>
> I said "seemed" because I have been information on the web which appears to show the Haswell taking
> considerably more power, but I'm not sure if they were being careful to ensure a fair comparison.
>

Such measurements are hard to carry even against conventional cores. Denver's code morphing layer multiplies the difficulty. The only established test that I am aware of is Spec_SPECpower_ssj2008, but Denver is not intended for server market, so it wouldn't be fair to benchmark it against Haswell (that most certainly is intended for server market) in that sort of test.

> If I can trust the various die pictures and quoted dimensions I have found, the Denver core seems a little
> smaller than the Clovertrail core. Allow for one being 28nm and the other 32nm, and they seem to work out
> about the same for equivalent geometries. How does the Haswell core size compare with Clovertrail?

I have no idea.
However, at this level of performance comparing core areas in isolation is meaningless. More so, IMHO, even comparing core+L1 areas in isolation is also meaningless, because L2 caches became integral parts of the deal.
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                                            Why read RWT or Reddit when you can get journalists to do it for you?Rob Thorpe01/02/15 08:20 AM
                                              Why read RWT or Reddit when you can get journalists to do it for you?juanrga01/02/15 11:21 AM
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                                                      Why read RWT or Reddit when you can get journalists to do it for you?juanrga01/03/15 01:11 PM
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                                                        Intentionally picking a competitors slow part is cheating ...Mark Roulo01/08/15 06:37 PM
                                                          Intentionally picking a competitors slow part is cheating ...coppice01/08/15 11:38 PM
                                                            Intentionally picking a competitors slow part is cheating ...Mark Roulo01/09/15 09:13 AM
                                                              Intentionally picking a competitors slow part is cheating ...Anon01/10/15 02:00 AM
                                                              Intentionally picking a competitors slow part is cheating ...David Hess01/11/15 01:03 PM
                                                            Intentionally picking a competitors slow part is cheating ...someone01/09/15 10:31 AM
                                                              Intentionally picking a competitors slow part is cheating ...coppice01/12/15 09:45 PM
                                                                Intentionally picking a competitors slow part is cheating ...coppice01/12/15 09:47 PM
                                                                  Intentionally picking a competitors slow part is cheating ...Michael S01/13/15 07:53 AM
                                                                    Intentionally picking a competitors slow part is cheating ...coppice01/13/15 09:44 AM
                                                                      Intentionally picking a competitors slow part is cheating ...Michael S01/13/15 10:01 AM
                                                                        Intentionally picking a competitors slow part is cheating ...coppice01/13/15 08:35 PM
                                                                      Core sizesjuanrga01/13/15 12:28 PM
                                                          NVIDIA'S FIRST CPU IS A WINNER (Linley Gwennap)juanrga01/10/15 04:34 PM
                                                        Why read RWT or Reddit when you can get journalists to do it for you?Patrick Chase01/08/15 07:02 PM
                                                        Why read RWT or Reddit when you can get journalists to do it for you?coppice01/08/15 10:18 PM
                                                          Why read RWT or Reddit when you can get journalists to do it for you?Patrick Chase01/09/15 11:54 AM
                                                            Why read RWT or Reddit when you can get journalists to do it for you?Mark Roulo01/09/15 12:59 PM
                                                              Why read RWT or Reddit when you can get journalists to do it for you?Patrick Chase01/09/15 03:20 PM
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                                                                Alternatives to OOOE (again)juanrga01/11/15 08:30 AM
                                                            Why read RWT or Reddit when you can get journalists to do it for you?Gabriele Svelto01/11/15 12:53 AM
                                              Why read RWT or Reddit when you can get journalists to do it for you?Fake Linus Torvalds01/03/15 12:14 PM
                                                Why read RWT or Reddit when you can get journalists to do it for you?Rob Thorpe01/03/15 08:25 PM
                                          Avoiding ping pongMaynard Handley12/09/14 11:33 AM
                                            Avoiding ping pongPatrick Chase12/09/14 01:54 PM
                                              Avoiding ping pongMaynard Handley12/09/14 06:56 PM
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                                      What about specialization?Troll?01/02/15 07:55 AM
                                        What about specialization?Ungo01/04/15 03:27 PM
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                            Object reference lockingPatrick Chase12/09/14 04:52 PM
                              Object reference lockingDavid W12/11/14 05:18 AM
                    ISA != interface for "most programmers"Paul A. Clayton12/04/14 03:34 PM
                      ISA != interface for "most programmers"rwessel12/04/14 07:50 PM
                  Interesting! (exporting hot lines/cache-aware ISA); "Please sir, I want some more" (NT)Paul A. Clayton12/04/14 02:26 PM
                  Avoiding ping pongMichael S12/06/14 03:48 PM
          ARMv8 getting atomic operationsLinus Torvalds12/04/14 12:05 PM
            LL/SC idiom recognition is not admitting RMW superiorityPaul A. Clayton12/04/14 02:34 PM
            ARMv8 getting atomic operationsanon12/04/14 10:17 PM
    ARMv8 getting atomic operationsPatrick Chase12/03/14 12:09 PM
  limited ordernksingh12/04/14 10:17 PM
    I didn't understand this either. (NT)Konrad Schwarz12/04/14 10:32 PM
    limited orderdmcq12/05/14 02:13 AM
    limited orderbakaneko12/05/14 09:11 AM
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