An elaborate theory of why AMD64 succeeded

By: anon (anon.delete@this.anon.com), August 21, 2013 2:09 am
Room: Moderated Discussions
⚛ (0xe2.0x9a.0x9b.delete@this.gmail.com) on August 20, 2013 11:29 pm wrote:
> Linus Torvalds (torvalds.delete@this.linux-foundation.org) on August 20, 2013 10:58 am wrote:
> > anon (anon.delete@this.anon.com) on August 20, 2013 1:58 am wrote:
> > >
> > > I always wondered why AMD did try this with their 64-bit move. I can see Intel of that era wanting
> > > to keep cost and complexity of implementing x86 high, but it made less sense for AMD.
> >
> > No it didn't.
> >
> > The reason x86-64 was so successful was *exactly* that AMD did things right, and legacy x86 wasn't some
> > separate thing, but is very much baked into x86-64. There is no "either or": x86-64 was designed pretty
> > much from the ground up to be an extension, not a "separate mode". It's pretty much seamless.
>
> 64-bit address space isn't a necessity.

Yes it is, for the kernel, and for quite a few large applications, ranging from databases, to hpc, to cad and media editing.

Real users were hitting 32-bit x86 limits 10 years ago. Probably more.

> 32-bit address space is big enough for 99.9% of programs.

"Most do not require it, therefore nobody requires it."

See the logical fallacy?

> In 99.9% programs, 64-bit address space has no performance advantage over a 32-bit address space.
>
> The non-existent things that AMD actually did exploit were:
>
> (1) The absence of an easy and safe way to do inter-process page mapping.

Wrong. This exists in Linux and POSIX for ever.

> In particular it is the absence of
> the following programming pattern: 32-bit process X selects a page P from its address space and directly or
> indirectly tells the OS kernel to map the page P into the address space of the 32-bit process Y. The page P
> has the same 64-bit physical memory address, but its 32-bit virtual addresses in X and Y are different.

You either fail to describe your programming pattern properly, or do not understand the concept of a unix process. Because either 1) this is already trivially possible, or 2) it is idiotic.

One process does not change the structure of another process address space. This is simply not done, for good reason. Threads exist for this reason.

On the other hand, you can trivially set up a communication mechanism between two processes and make them do whatever you like. Process X can trivially tell process Y to perform some address space operation.

>
> (2) Complete lack of data serialization functions that would be built into mainstream programming languages.
> That is, the programming language needs to have a couple of builtin functions for transforming graphs of objects
> or structs into binary representation and for restoring such graphs from binary data. All that is needed are
> these two functions: bytes=save(x), y=load(bytes). I have implemented such functions in a programming language
> of my own, and the presence of such functions in the programming language makes a big difference in terms of
> communication between parts of a single program and in terms of communication between different programs.

That's idiotic. There is no fundamental reason to put a data serialization protocol into a programming language, and nothing preventing serialization functions from being used. Which they are. Widely.

>
> Case (1) obviously covers binary data only. For example, it can be used
> to send pixels to the X server. Secondly, it can be used by case (2).

Tip: for high performance cases on local machine where you're sharing pages, you don't run your serialization functions under your sharing abstraction. It's useless overhead.

>
> The combined absence of 1 and 2 was (and still is) making hard for processes to communicate.

No it wasn't.

> It is curious that you are fully responsible for the absence of (1) in the Linux kernel.
>
> By the way, it is my firm opinion that you do not know how to properly design an operating system
> (... PID is just an integer, not a kernel object, and the integer value can be recycled? What an
> exquisitely crappy idea, for a PID to be what it is in Linux! typeof(PID)==just_int => idiocy).

There are an endless number of firm believers in Linux's stupidity and brokenness over the decades. You are in good company.

>
> > Yes, yes, "long mode" is a new mode bit, but at the same time you can see how it's
> > really using the same instruction decode logic, the same execution units, etc etc.
> > It's not two different front-ends, it's clearly one unified architecture.
>
> The success of the 64-bit "long mode" of x86 CPUs only proves that there are
> huge mistakes in operating system design and in programming language design.

Non sequitur. Even if your above false assertions were true, you have provided no logic to derive this from them.

>
> > Yes, you could drop some legacy x86 stuff, but you can tell how integrated x86-64 is by simply
> > noting that the stuff you'd drop is actually totally independent of the new long mode.
>
> x86-64 solely exists because AMD outcompeted all mainstream OS developers and programming language
> designers. With the 64-bit address space AMD solved the memory limit problem in the large applications
> that were starting to appear around the year 2000. Programs consuming 300 MiB of memory are just too
> close to the 4 GiB limit of the 32-bit address space, and so 4 GiB starts to limit progress.

What are you babbling about? 300MiB? Easily usable by a single process in standard 32-bit mode.

OS developers
> and programming language designers (including the C programming language) misunderstood what was happening
> and failed to solve the coming problems before the CPU solved it. Basically, they failed to devise
> a way of efficiently splitting the coming memory intensive applications into multiple 32-bit processes

No, they did not. This was actually done. See remap_file_pages(2), for example. But it was done from necessity and Intel's IA64-driven artificial restriction on extending the address space. NOT because it was the best technical thing to do.

> - and that is why x86-64 appeared as-if it was the logical step to do.
>
> > It's basically
> > the same thing you might want to drop even if you never did long mode at all. The things you'd
> > likely want to drop are the old 16-bit modes, and some of the worst excesses dragged in by the
> > i286 in particular. But it may never happen, because it just isn't painful enough.
> >
> > And I really think that the whole "seamless integration" was the right thing to do.
>
> No wonder here. You (mis)designed the Linux kernel so there is
> no reason to believe that you could imagine a different world.

You're a joke, quite frankly. I should not have bothered wasting my time to reply to you.

You did not show even a faint glimmer of understanding, and literally everything you said above was wrong.

If you can point to an operating system which does these things fundamentally better, with evidence; or even a concrete proposal of *exactly* how an application is restricted with current OS, and *exactly* what steps can solve it, then do so now. If not, STFU.

I'm quite serious. You *do* realize that unmoderated forums and mailing lists are literally full of crazies, charlatans, and half-wits peddling their snake oil and offering exactly zero evidence or sound logic? And that your ranting post makes you indistinguishable from them? So, no more handwaving or insults here. Link to source code, or logically sound steps combined with link to numerical evidence.
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                    How does Power compare to ARM / MIPS?Patrick Chase2013/08/15 08:54 PM
                      How does Power compare to ARM / MIPS?EduardoS2013/08/15 09:21 PM
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        Server and Embedded "environments" are still distinguishedPaul A. Clayton2013/08/13 06:31 PM
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            How does Power compare to ARM / MIPS?David Kanter2013/08/15 01:23 AM
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                How does Power compare to ARM / MIPS?someone2013/08/15 11:46 AM
          How does Power compare to ARM / MIPS?none2013/08/15 03:47 AM
          How does Power compare to ARM / MIPS?Doug S2013/08/15 09:46 AM
            How does Power compare to ARM / MIPS?David Kanter2013/08/15 12:48 PM
              Initial 64-bit ARM *can* run older 32-bit ARM codeMark Roulo2013/08/15 01:56 PM
                Initial 64-bit ARM *can* run older 32-bit ARM codeRonald Maas2013/08/19 09:19 PM
                  Initial 64-bit ARM *can* run older 32-bit ARM codeanon2013/08/20 01:58 AM
                    Initial 64-bit ARM *can* run older 32-bit ARM codeLinus Torvalds2013/08/20 10:58 AM
                      Initial 64-bit ARM *can* run older 32-bit ARM codeRicardo B2013/08/20 03:27 PM
                        Initial 64-bit ARM *can* run older 32-bit ARM coderwessel2013/08/20 04:04 PM
                        Initial 64-bit ARM *can* run older 32-bit ARM codeLinus Torvalds2013/08/20 04:05 PM
                          Initial 64-bit ARM *can* run older 32-bit ARM codeMichael S2013/08/20 04:54 PM
                            Initial 64-bit ARM *can* run older 32-bit ARM codeLinus Torvalds2013/08/20 05:09 PM
                          Initial 64-bit ARM *can* run older 32-bit ARM codeTREZA2013/08/21 06:06 AM
                            Initial 64-bit ARM *can* run older 32-bit ARM codeLinus Torvalds2013/08/21 09:50 AM
                              Initial 64-bit ARM *can* run older 32-bit ARM codeTREZA2013/08/21 12:39 PM
                          Initial 64-bit ARM *can* run older 32-bit ARM codeRicardo B2013/08/22 05:25 AM
                            Initial 64-bit ARM *can* run older 32-bit ARM codeEduardoS2013/08/22 06:59 AM
                              Initial 64-bit ARM *can* run older 32-bit ARM codeRicardo B2013/08/22 07:28 AM
                                Initial 64-bit ARM *can* run older 32-bit ARM codeEduardoS2013/08/22 08:36 AM
                                  Initial 64-bit ARM *can* run older 32-bit ARM codeRicardo B2013/08/22 09:21 AM
                                    Initial 64-bit ARM *can* run older 32-bit ARM codeEduardoS2013/08/22 10:02 AM
                        Initial 64-bit ARM *can* run older 32-bit ARM codeGabriele Svelto2013/08/21 03:26 AM
                          Initial 64-bit ARM *can* run older 32-bit ARM codeRicardo B2013/08/22 05:43 AM
                            Initial 64-bit ARM *can* run older 32-bit ARM codeRicardo B2013/08/22 05:47 AM
                        Initial 64-bit ARM *can* run older 32-bit ARM codeDan Fay2013/08/21 01:13 PM
                          Initial 64-bit ARM *can* run older 32-bit ARM codeDavid Hess2013/08/22 10:55 AM
                            Initial 64-bit ARM *can* run older 32-bit ARM codegallier22013/08/22 12:35 PM
                              Initial 64-bit ARM *can* run older 32-bit ARM codeDavid Hess2013/08/22 01:26 PM
                      Initial 64-bit ARM *can* run older 32-bit ARM codeRonald Maas2013/08/20 05:38 PM
                      Initial 64-bit ARM *can* run older 32-bit ARM codeanon2013/08/20 06:07 PM
                        Initial 64-bit ARM *can* run older 32-bit ARM codeMichael S2013/08/21 05:15 AM
                          Initial 64-bit ARM *can* run older 32-bit ARM codeanon2013/08/21 06:01 AM
                      An elaborate theory of why AMD64 succeeded2013/08/20 11:29 PM
                        An elaborate theory of why AMD64 succeededanon2013/08/21 02:09 AM
                          An elaborate theory of why AMD64 succeeded2013/08/21 04:12 AM
                            An elaborate theory of why AMD64 succeededbakaneko2013/08/21 04:39 AM
                              An elaborate theory of why AMD64 succeeded2013/08/21 05:20 AM
                                An elaborate theory of why AMD64 succeededbakaneko2013/08/21 05:41 AM
                                  An elaborate theory of why AMD64 succeeded2013/08/21 06:47 AM
                                    An elaborate theory of why AMD64 succeededbakaneko2013/08/21 07:26 AM
                            An elaborate theory of why AMD64 succeededanon2013/08/21 05:40 AM
                              An elaborate theory of why AMD64 succeeded2013/08/21 06:47 AM
                                Mod? (NT)anon2013/08/21 07:28 AM
                                  An elaborate theory of why AMD64 succeeded2013/08/21 08:34 AM
                                    An elaborate theory of why AMD64 succeededanon2013/08/21 09:04 AM
                                OK, let's try and keep this productiveDavid Kanter2013/08/21 01:27 PM
                                  OK, let's try and keep this productivePatrick Chase2013/08/21 11:42 PM
                                    OK, let's try and keep this productiveGabriele Svelto2013/08/22 02:48 AM
                                    OK, let's try and keep this productivePatrick Chase2013/08/22 09:03 AM
                                  OK, let's try and keep this productiveanon2013/08/22 12:47 AM
                            An elaborate theory of why AMD64 succeededCarlie Coats2013/08/21 06:31 AM
                              An elaborate theory of why AMD64 succeeded2013/08/21 06:59 AM
                              An elaborate theory of why AMD64 succeededMichael S2013/08/21 07:15 AM
                                An elaborate theory of why AMD64 succeededCarlie Coats2013/08/21 12:25 PM
                                  switched to write-only mode? (NT)Michael S2013/08/21 01:43 PM
                                  An elaborate theory of why AMD64 succeededrwessel2013/08/21 01:53 PM
                                  An elaborate theory of why AMD64 succeededMichael S2013/08/21 02:13 PM
                                  An elaborate theory of why AMD64 succeededBrett2013/08/21 06:25 PM
                                    An elaborate theory of why AMD64 succeededCarlie Coats2013/08/22 04:36 AM
                            An elaborate theory of why AMD64 succeededanon2013/08/21 06:46 AM
                              An elaborate theory of why AMD64 succeeded2013/08/21 07:07 AM
                                An elaborate theory of why AMD64 succeededanon2013/08/21 07:27 AM
                            An elaborate theory of why AMD64 succeededVincent Diepeveen2013/08/31 02:24 AM
                          An elaborate theory of why AMD64 succeededCarlie Coats2013/08/21 06:24 AM
                            An elaborate theory of why AMD64 succeededMichael S2013/08/21 07:03 AM
                              An elaborate theory of why AMD64 succeededCarlie Coats2013/08/21 12:27 PM
                        An elaborate theory of why AMD64 succeededStubabe2013/08/21 09:43 AM
                          An elaborate theory of why AMD64 succeededMichael S2013/08/21 10:02 AM
                            An elaborate theory of why AMD64 succeededStubabe2013/08/21 10:37 AM
                              An elaborate theory of why AMD64 succeededKlimax2013/08/21 11:09 AM
                                An elaborate theory of why AMD64 succeededStubabe2013/08/21 04:27 PM
                            An elaborate theory of why AMD64 succeededLinus Torvalds2013/08/21 10:40 AM
                              An elaborate theory of why AMD64 succeededYuhong Bao2013/08/22 01:11 AM
                                An elaborate theory of why AMD64 succeededEduardoS2013/08/22 03:25 AM
                                  An elaborate theory of why AMD64 succeedednone2013/08/22 04:29 AM
                                  An elaborate theory of why AMD64 succeededRicardo B2013/08/22 06:06 AM
                            An elaborate theory of why AMD64 succeededEduardoS2013/08/21 11:58 AM
                            An elaborate theory of why AMD64 succeededanon2013/08/22 01:25 AM
                              An elaborate theory of why AMD64 succeededEduardoS2013/08/22 03:29 AM
                          An elaborate theory of why AMD64 succeededSymmetry2013/08/21 10:51 AM
                            An elaborate theory of why AMD64 succeededStubabe2013/08/21 04:22 PM
                        An elaborate theory of why AMD64 succeededDan Fay2013/08/21 01:43 PM
                        No elaborate theories requiredDoug S2013/08/21 05:18 PM
                          No elaborate theories requiredGabriele Svelto2013/08/22 05:28 AM
                            No elaborate theories requiredDoug S2013/08/22 10:03 AM
                          No elaborate theories requiredDavid Hess2013/08/22 02:38 PM
                            No elaborate theories requiredDoug S2013/08/22 03:30 PM
                              No elaborate theories requiredDavid Hess2013/08/23 09:42 AM
                                No elaborate theories requiredanon2013/08/24 02:09 AM
                                  No elaborate theories requiredDavid Hess2013/08/24 05:36 PM
                        An very bad theory of why AMD64 succeededEric Bron2013/08/23 02:50 AM
                          An very bad theory of why AMD64 succeededEduardoS2013/08/23 04:36 AM
                      How about dropping x87?David Kanter2013/08/21 10:46 AM
                        How about dropping x87?Michael S2013/08/21 11:01 AM
                          How about dropping x87?David Kanter2013/08/21 01:34 PM
                            How about dropping x87?anonymou52013/08/21 06:27 PM
                              How about dropping x87?David Kanter2013/08/22 01:02 AM
                                How about dropping x87?TREZA2013/08/22 03:40 AM
                                How about dropping x87?rwessel2013/08/22 12:41 PM
                        Initial 64-bit ARM *can* run older 32-bit ARM codeLinus Torvalds2013/08/20 08:15 PM
                          Initial 64-bit ARM *can* run older 32-bit ARM codeRonald Maas2013/08/21 12:38 PM
                            Initial 64-bit ARM *can* run older 32-bit ARM codebakaneko2013/08/21 01:17 PM
                            Initial 64-bit ARM *can* run older 32-bit ARM codeMichael S2013/08/21 02:30 PM
                            Initial 64-bit ARM *can* run older 32-bit ARM codemas2013/08/21 06:10 PM
                              Initial 64-bit ARM *can* run older 32-bit ARM codenone2013/08/21 08:25 PM
                                Initial 64-bit ARM *can* run older 32-bit ARM codemas2013/08/22 01:19 AM
                                  Initial 64-bit ARM *can* run older 32-bit ARM codeanon2013/08/22 01:53 AM
                                    Initial 64-bit ARM *can* run older 32-bit ARM codemas2013/08/22 02:07 AM
                                      Initial 64-bit ARM *can* run older 32-bit ARM codemas2013/08/22 02:11 AM
                                        Initial 64-bit ARM *can* run older 32-bit ARM codenone2013/08/22 02:30 AM
                                          Initial 64-bit ARM *can* run older 32-bit ARM codemas2013/08/22 03:34 AM
                                            Initial 64-bit ARM *can* run older 32-bit ARM codenone2013/08/22 06:04 AM
                                              Initial 64-bit ARM *can* run older 32-bit ARM codemas2013/08/22 07:56 AM
                                  Initial 64-bit ARM *can* run older 32-bit ARM codenone2013/08/22 02:09 AM
                                    Initial 64-bit ARM *can* run older 32-bit ARM codemas2013/08/22 02:26 AM
                                      Initial 64-bit ARM *can* run older 32-bit ARM codenone2013/08/22 02:38 AM
                                        Initial 64-bit ARM *can* run older 32-bit ARM codemas2013/08/22 02:52 AM
                                          Initial 64-bit ARM *can* run older 32-bit ARM codenone2013/08/22 03:13 AM
                                  Initial 64-bit ARM *can* run older 32-bit ARM coderwessel2013/08/22 01:06 PM
                                    Initial 64-bit ARM *can* run older 32-bit ARM codemas2013/08/22 01:42 PM
                                      Initial 64-bit ARM *can* run older 32-bit ARM coderwessel2013/08/22 07:06 PM
                                        Initial 64-bit ARM *can* run older 32-bit ARM codeMichael S2013/08/23 04:53 AM
                                          Initial 64-bit ARM *can* run older 32-bit ARM coderwessel2013/08/23 09:14 PM
                                        Initial 64-bit ARM *can* run older 32-bit ARM codeTREZA2013/08/23 12:53 PM
                                    Initial 64-bit ARM *can* run older 32-bit ARM codeMichael S2013/08/22 02:15 PM
                                      Initial 64-bit ARM *can* run older 32-bit ARM coderwessel2013/08/22 07:10 PM
                                        Initial 64-bit ARM *can* run older 32-bit ARM codeMichael S2013/08/23 04:38 AM
                                        Initial 64-bit ARM *can* run older 32-bit ARM codeEugene Nalimov2013/08/23 01:00 PM
                                          Initial 64-bit ARM *can* run older 32-bit ARM codeanon2013/08/24 02:11 AM
                                            Initial 64-bit ARM *can* run older 32-bit ARM codeEugene Nalimov2013/08/26 02:35 PM
                                          Initial 64-bit ARM *can* run older 32-bit ARM codevvid2013/08/28 09:36 AM
                                            Initial 64-bit ARM *can* run older 32-bit ARM codeEugene Nalimov2013/08/29 09:51 AM
                                              Initial 64-bit ARM *can* run older 32-bit ARM codeMax2013/08/30 01:12 PM
                                                Initial 64-bit ARM *can* run older 32-bit ARM codeLinus Torvalds2013/08/30 04:13 PM
                                                  Separate instruction and data registers BAD or NOT, m68kBrett2013/08/30 06:42 PM
                                                    Separate instruction and data registers BAD or NOT, m68kanon2013/08/30 07:29 PM
                                                      Trade-offs are not constantPaul A. Clayton2013/08/31 10:33 AM
                                                      Separate instruction and data registers BAD or NOT, m68kMichael S2013/08/31 11:42 AM
                                                      Separate instruction and data registers BAD or NOT, m68kBrett2013/08/31 02:51 PM
                                                    Separate instruction and data registers BAD or NOT, m68ksomeone2013/08/30 11:15 PM
                                                      Separate instruction and data registers BAD or NOT, m68kBrett2013/08/31 02:54 PM
                                                      Separate instruction and data registers BAD or NOT, m68kBrett2013/08/31 03:08 PM
                                                        Separate instruction and data registers BAD or NOT, m68kanon2013/08/31 07:43 PM
                                                          Separate instruction and data registers BAD or NOT, m68kMichael S2013/09/01 01:07 AM
                                                            Partitioned register sets BAD or NOTBrett2013/09/01 02:03 AM
                                                              Partitioned register sets BAD or NOTPatrick Chase2013/09/01 10:38 AM
                                                                Embedded VLIWPaul A. Clayton2013/09/01 12:54 PM
                                                                  Embedded VLIWPatrick Chase2013/09/01 03:14 PM
                                                                    Thanks for the additional info (NT)Paul A. Clayton2013/09/01 08:54 PM
                                                                Partitioned register sets BAD or NOTPatrick Chase2013/09/02 12:06 AM
                                                                Stop bitsBrett2013/09/02 02:24 PM
                                                                  Stop bitsPatrick Chase2013/09/02 03:00 PM
                                                            Separate instruction and data registers BAD or NOT, m68kanon2013/09/01 10:12 AM
                                                    Separate instruction and data registers BAD or NOT, m68kRichardC2013/08/31 06:03 AM
                                                    Separate instruction and data registers BAD or NOT, m68kMegol2013/09/04 07:04 AM
                                                      Separate instruction and data registers BAD or NOT, m68kBrett2013/09/04 11:27 PM
                                                        Separate instruction and data registers BAD or NOT, m68kMegol2013/09/05 07:32 AM
                                                          Separate instruction and data registers BAD or NOT, m68kgallier22013/09/05 09:37 AM
                                                            Separate instruction and data registers BAD or NOT, m68kMegol2013/09/05 10:48 AM
                                                          Separate instruction and data registers BAD or NOT, m68kJouni Osmala2013/09/05 11:18 AM
                                                            Separate instruction and data registers BAD or NOT, m68kMegol2013/09/06 05:17 AM
                                                            John Mashey post is sorta relevant ...Mark Roulo2013/09/06 09:30 AM
                                                              John Mashey post is sorta relevant ...Megol2013/09/06 11:59 AM
                                                                John Mashey post is sorta relevant ...Brett2013/09/06 06:32 PM
                                                                  John Mashey post is sorta relevant ...Eugene Nalimov2013/09/08 11:10 AM
                                                                    John Mashey post is sorta relevant ...Brett2013/09/08 02:54 PM
                                                                      John Mashey post is sorta relevant ...David Kanter2013/09/08 05:06 PM
                                                                        John Mashey post is sorta relevant ...Brett2013/09/08 07:48 PM
                                                                          John Mashey post is sorta relevant ...Jouni Osmala2013/09/09 06:26 AM
                                                                            John Mashey post is sorta relevant ...Brett2013/09/13 04:51 PM
                                                                              John Mashey post is sorta relevant ...Megol2013/09/14 09:56 AM
                                                                      John Mashey post is sorta relevant ...Eugene Nalimov2013/09/08 06:59 PM
                                                                        John Mashey post is sorta relevant ...Brett2013/09/08 07:55 PM
                                                                        Renesas RX vs x86/68K/VAXMichael S2013/09/09 06:15 AM
                                                  Initial 64-bit ARM *can* run older 32-bit ARM codeEduardoS2013/08/31 11:09 AM
                                                    Initial 64-bit ARM *can* run older 32-bit ARM codeLinus Torvalds2013/08/31 11:34 AM
                                                      Initial 64-bit ARM *can* run older 32-bit ARM codeEduardoS2013/08/31 12:26 PM
                                                        Initial 64-bit ARM *can* run older 32-bit ARM codeLinus Torvalds2013/08/31 02:12 PM
                                                          Initial 64-bit ARM *can* run older 32-bit ARM codeEduardoS2013/08/31 03:49 PM
                                                    Initial 64-bit ARM *can* run older 32-bit ARM codegallier22013/08/31 12:15 PM
                              Initial 64-bit ARM *can* run older 32-bit ARM codeRonald Maas2013/08/21 11:54 PM
                                Initial 64-bit ARM *can* run older 32-bit ARM codemas2013/08/22 01:10 AM
                                Initial 64-bit ARM *can* run older 32-bit ARM codeMichael S2013/08/22 02:47 AM
                                  Initial 64-bit ARM *can* run older 32-bit ARM codemas2013/08/22 03:17 AM
                              Initial 64-bit ARM *can* run older 32-bit ARM codeGabriele Svelto2013/08/22 07:53 AM
                      Initial 64-bit ARM *can* run older 32-bit ARM codeMr. Camel2013/08/23 06:33 AM
                        Initial 64-bit ARM *can* run older 32-bit ARM codeMichael S2013/08/23 07:03 AM
                        Initial 64-bit ARM *can* run older 32-bit ARM codeEduardoS2013/08/23 07:39 AM
                          Initial 64-bit ARM *can* run older 32-bit ARM codeRonald Maas2013/08/23 10:13 AM
                            Initial 64-bit ARM *can* run older 32-bit ARM codeEduardoS2013/08/23 10:28 AM
                        Initial 64-bit ARM *can* run older 32-bit ARM coderwessel2013/08/23 10:14 PM
              How does Power compare to ARM / MIPS?EduardoS2013/08/15 08:35 PM
                How does Power compare to ARM / MIPS?Carlie Coats2013/08/21 12:31 PM
              Mixing 32b and 64b code in a kernelDoug S2013/08/16 09:50 AM
                LPAE is here now!Mark Roulo2013/08/16 10:45 AM
                  LPAE is here now!Patrick Chase2013/08/16 12:29 PM
                    LPAE is here now!anon2013/08/16 06:11 PM
                Mixing 32b and 64b code in a kernelRicardo B2013/08/17 10:52 AM
                  Mixing 32b and 64b code in a kernelLinus Torvalds2013/08/17 11:09 AM
                    Mixing 32b and 64b code in a kernelMax2013/08/18 02:57 PM
                Mixing 32b and 64b code in a kernelCarlie Coats2013/08/21 12:46 PM
            How does Power compare to ARM / MIPS?Ungo2013/08/15 12:59 PM
              How does Power compare to ARM / MIPS?Doug S2013/08/15 07:39 PM
                How does Power compare to ARM / MIPS?Patrick Chase2013/08/15 08:04 PM
                  How does Power compare to ARM / MIPS?Patrick Chase2013/08/15 09:01 PM
                How does Power compare to ARM / MIPS?Jukka Larja2013/08/16 06:54 AM
          How does Power compare to ARM / MIPS?Patrick Chase2013/08/15 07:29 PM
            How does Power compare to ARM / MIPS?Brett2013/08/16 11:34 PM
              How does Power compare to ARM / MIPS?Doug S2013/08/17 11:18 AM
                How does Power compare to ARM / MIPS?Brett2013/08/17 11:35 AM
                  16 vs 32 general purpose registersMark Roulo2013/08/17 11:40 AM
                    16 vs 32 general purpose registersMichael S2013/08/17 02:55 PM
                      16 vs 32 general purpose registersPatrick Chase2013/08/18 04:55 AM
                  How does Power compare to ARM / MIPS?EduardoS2013/08/17 05:30 PM
                How does Power compare to ARM / MIPS?Patrick Chase2013/08/17 12:49 PM
                  > 32 general purpose registersMark Roulo2013/08/17 01:58 PM
                    > 32 general purpose registersMichael S2013/08/17 02:25 PM
                    > 32 general purpose registersPatrick Chase2013/08/17 03:11 PM
                      > 32 general purpose registersExophase2013/08/18 10:17 AM
                        IIRC, AArch32 registers (shadow registers et al.) map onto AArch64 registers (NT)Paul A. Clayton2013/08/18 02:51 PM
                          IIRC, AArch32 registers (shadow registers et al.) map onto AArch64 registersExophase2013/08/18 09:28 PM
                            IIRC, AArch32 registers (shadow registers et al.) map onto AArch64 registersMichael S2013/08/19 02:17 AM
                              IIRC, AArch32 registers (shadow registers et al.) map onto AArch64 registersExophase2013/08/19 08:42 AM
                    > 32 general purpose registersDoug S2013/08/18 12:21 AM
        How does Power compare to ARM / MIPS?Brett2013/08/17 11:20 AM
          How does Power compare to ARM / MIPS?Gabriele Svelto2013/08/18 02:12 PM
            How does Power compare to ARM / MIPS?Exophase2013/08/18 09:35 PM
          How does Power compare to ARM / MIPS?mas2013/08/20 03:29 PM
      How does Power compare to ARM / MIPS?mas2013/08/20 03:15 PM
        How does Power compare to ARM / MIPS?none2013/08/20 03:31 PM
          How does Power compare to ARM / MIPS?mas2013/08/20 04:08 PM
        How does Power compare to ARM / MIPS?Linus Torvalds2013/08/20 03:49 PM
          How does Power compare to ARM / MIPS?mas2013/08/20 05:53 PM
            How does Power compare to ARM / MIPS?Linus Torvalds2013/08/20 07:52 PM
              How does Power compare to ARM / MIPS?mas2013/08/21 12:21 AM
                How does Power compare to ARM / MIPS?Michael S2013/08/21 06:17 AM
                  How does Power compare to ARM / MIPS?mas2013/08/21 07:05 AM
                    How does Power compare to ARM / MIPS?Michael S2013/08/21 07:27 AM
                      How does Power compare to ARM / MIPS?none2013/08/21 07:53 AM
                        How does Power compare to ARM / MIPS?Michael S2013/08/21 08:02 AM
                          XScale wasn't synthesizablePatrick Chase2013/08/21 12:36 PM
                            XScale wasn't synthesizableMichael S2013/08/21 02:00 PM
                              XScale wasn't synthesizablePatrick Chase2013/08/21 03:02 PM
                              XScale wasn't synthesizablePatrick Chase2013/08/21 03:11 PM
                      How does Power compare to ARM / MIPS?mas2013/08/21 08:45 AM
                  How does Power compare to ARM / MIPS?mas2013/08/22 04:08 AM
            How does Power compare to ARM / MIPS?Doug S2013/08/20 10:47 PM
              How does Power compare to ARM / MIPS?Michael S2013/08/21 07:32 AM
              How does Power compare to ARM / MIPS?Patrick Chase2013/08/21 08:37 AM
              How does Power compare to ARM / MIPS?Patrick Chase2013/08/21 11:45 AM
                How does Power compare to ARM / MIPS?EduardoS2013/08/21 12:02 PM
                  How does Power compare to ARM / MIPS?Patrick Chase2013/08/21 12:27 PM
                    How does Power compare to ARM / MIPS?Patrick Chase2013/08/21 12:47 PM
                      Is simplistic prediction still prediction?Paul A. Clayton2013/08/21 03:59 PM
                        Is simplistic prediction still prediction?Patrick Chase2013/08/22 12:16 PM
                          More like always not-taken, but yeah lame prediction (NT)Paul A. Clayton2013/08/22 01:27 PM
                      How does Power compare to ARM / MIPS?Linus Torvalds2013/08/21 04:25 PM
                        Athlon did something similar (but no dirty special case)Paul A. Clayton2013/08/21 07:47 PM
                          Athlon did something similar (but no dirty special case)Patrick Chase2013/08/22 12:13 PM
                        How does Power compare to ARM / MIPS?Patrick Chase2013/08/22 11:56 AM
                        How does Power compare to ARM / MIPS?Patrick Chase2013/08/22 12:29 PM
                          How does Power compare to ARM / MIPS?Linus Torvalds2013/08/22 01:40 PM
                    How does Power compare to ARM / MIPS?anon2013/08/22 12:45 AM
                      How does Power compare to ARM / MIPS?Niels Jørgen Kruse2013/08/22 02:38 AM
                        How does Power compare to ARM / MIPS?Michael S2013/08/22 02:58 AM
                      How does Power compare to ARM / MIPS?Patrick Chase2013/08/22 08:44 AM
                        Are you sure P4 used IP-based way prediction?Paul A. Clayton2013/08/22 02:04 PM
                          Are you sure P4 used IP-based way prediction?Patrick Chase2013/08/22 03:40 PM
                        How does Power compare to ARM / MIPS?Patrick Chase2013/08/24 10:19 AM
                          How does Power compare to ARM / MIPS?Anon2013/08/25 01:15 AM
                            How does Power compare to ARM / MIPS?Patrick Chase2013/08/25 07:49 PM
                              Replay tornadoes? Paul A. Clayton2013/08/25 08:43 PM
                        How does Power compare to ARM / MIPS?anon2013/08/25 04:22 PM
                          How does Power compare to ARM / MIPS?anonymou52013/08/25 04:35 PM
                            I have the date and topic for a P4 Dcache postPaul A. Clayton2013/08/25 08:34 PM
                              Obviously that should have been "anonymous (no@spam.com)" (NT)Paul A. Clayton2013/08/25 08:45 PM
                              I have the date and topic for a P4 Dcache postPatrick Chase2013/08/26 09:04 AM
                                Could you provide a link?Paul A. Clayton2013/08/26 10:32 AM
                                  Could you provide a link?Patrick Chase2013/08/26 10:43 AM
                                    Thanks. I had a text copy without url.Paul A. Clayton2013/08/26 03:20 PM
                                      Thanks. I had a text copy without url.Patrick Chase2013/08/26 06:53 PM
                            How does Power compare to ARM / MIPS?anon2013/08/25 09:37 PM
                              How does Power compare to ARM / MIPS?David Kanter2013/08/26 02:31 PM
                              How does Power compare to ARM / MIPS?Patrick Chase2013/08/27 05:11 PM
                                I think even later P4s used width pipelining (NT)Paul A. Clayton2013/08/27 06:20 PM
    How does Power compare to ARM / MIPS?Vincent Diepeveen2013/08/26 05:04 AM
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