Anyone remember Phase 5 planning a Cyberstrom with 4 G4's on it ? (I'm not sure about the G4's though...)

How would that have worked ? I mean, wouldnt that need a multiprocessor capable OS ??
Phase 5 might/could have solved thta using their own software (WarpUp).
Could OS4 be made to work like that with multiple processors ?

Mind you all, I dont have any clue about all this stuff.....

Anyone know how that would have worked ? Rogue ? Anyone from Genesi/OS4 team ??

Realy curious overhere

efit: Didnt Rogue have a multiprocessor card in his A1 a while ago ? Hmmm, I'l go and search for that post...

Cheers,

Martin

Last edited by Metalheart on 05-Jan-2009 at 07:50 PM.

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The CyberStorm G4 should have only 1 CPU onboard and a 68k emulation in Flashrom.

@DJBase

I know, but I meant like I said that I thought I saw an anouncement of a multiproc G4 card...

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Never heard about this at least not for any Classic Amiga. Maybe you mixed this with the A\BOX, pre/box, AMIRAGE K2.

@DJBase

To be honest, I cant remember for sure if it was Phase 5 or whoever, but I definately read something about it somewhere.

edit: I remember a picture of a board with 4 processors placed in a diamond shape.

Not very convincing, isn't it

Anyway I thought of this and wondered how it should have worked, and if the software side of it could be used to implement sort of SMP into OS4/MorphOS...

I'll keep on searching for it.

Last edited by Metalheart on 05-Jan-2009 at 09:42 PM.

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@Metalheart

Hm, like the Power5 Quad Core?

@DJBase

can't view the picture. You mean http://www.cs.utah.edu/classes/cs3710/power5_8way_144MBcache.jpg ?

But that's probably not what he meant.

Last edited by olegil on 05-Jan-2009 at 10:34 PM.

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@olegil

i belive that ther maked ther biggest mistake to make a board with both 040 and ppc. there shuld have make a ppc only acc kort then it world have been a sussecs iff it was out much much sooner,

i never understod way the amiga 1200 orgin cpu the 020 was disabled when you blocked in an acc card. way couldt amiga os handle both cpu and could it had been done or are it impossible

@Metalheart

Quote:

efit: Didnt Rogue have a multiprocessor card in his A1 a while ago ? Hmmm, I'l go and search for that post...

Dunno if they ever tried this one.

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@tomazkid

That's the one that I remember, too. It was an experimental module that was intended for the A1 XEs, but for some reason (probably interference by another company) it was abandoned.

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Quote:

tonyw wrote: That's the one that I remember, too. It was an experimental module that was intended for the A1 XEs, but for some reason (probably interference by another company) it was abandoned.

And right now they are interfering with OS4 by suing Hyperion..

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I do remember this being talked about.

From memory, Laire (Ralph Schmidt), onetime author of the ppc.library, reckoned he could get some form of SMP into the ppc.library, and Phase 5 were looking at the possibility of up to 4 CPUs... but that's from a long time back (10 years ago) and my memory may be telling large Porkie Pies.

I think Mr Schmidt is the only person who could verify how far this idea went.

@Spirantho

Yes, Yes ! Thats the one I meant

Lets go and find Mr Schmidt.....

Not that it would make a difference, but it could be fun to learn how this would have worked, and how far along the development of this board was.

But maybe... he could talk to Hyperion about what he was doing... Nah... nevermind that

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@Metalheart

so can anyone explain way amiga os. cant use 2 cpu´s
and use duel core technology,and two different cpu´s at the same time on the same task.

@retro

Well, it can in a way.
PPC + 68k did work. (independent from each other though)
But as Spirantho mentioned, for dual-core, smp-technology is needed, and we don't have that.

@For all you experts

Could NUMA be something for AmigaOS?
Or is it an even greater task to implement?

Last edited by tomazkid on 07-Jan-2009 at 03:12 AM.

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@retro

because AmigaOS does not synchronize data between task well, there is no concepts of spin locks, thats when ONE cpu waits go get resources to memory structures, instead AmigaOS simply truns of multitasking when it does not won't other tasks from modifying same memory at same time.

when shared memory is modified or going to be modified, internal CPU caches most be flushed, this not done whit the current design.

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@retro

Quote:

i never understod way the amiga 1200 orgin cpu the 020 was disabled when you blocked in an acc card. way couldt amiga os handle both cpu and could it had been done or are it impossible

I guess it could have been done, but doing it probably wouldn't have been too easy. The OS can't really use both of them "in a normal multicore / multicpu way" anyway. Theoretically it might have been possible to make it run some simple task, that is almost totally separated from the OS (for example sound mixing or something, for which it would be way too slow anyway) and still there would be problems, when both CPU's want to access the same memory (in which case the other has to wait, which generally slows down the faster CPU)

Well, to put it short, it wouldn't have been worth it, considering the minimal theoretical speed increase (if any, due to more complex design) a 020 could offer (especially compared to a 060)

All very interesting, but why bother with multicore or multicpu ? We never even passed the 1Ghz barrier, well except for some refurbished modules maybe.

Just faster would be great to start with... if multicore is the only way then it's fine by me. But otherwise ?

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