By: Kara (karaardalan.delete@this.gmail.com), August 27, 2022 11:18 am
Room: Moderated Discussions
Björn Ragnar Björnsson (bjorn.ragnar.delete@this.gmail.com) on August 27, 2022 11:07 am wrote:
> Rayla (rayla.delete@this.example.com) on August 27, 2022 10:35 am wrote:
> > Nobod (Nobod.delete@this.nospam.com) on August 27, 2022 9:21 am wrote:
> > > Chips & Cheese analyzes Tachyum’s Revised Prodigy Architecture
> > >
> > > The new architecture is more traditional and more likely to work. Unfortunately it is trying to address
> > > both HPC and datacenter server markets, but isn’t better than the alternatives at either job.
> >
> > So... A somewhat unbalanced OoO design (gshare predictor, only 96 physical regs), a pair of massive vector
> > units, tiny total caches per core (1MB is fine as an L2, but in the absence of a dedicated L3 it's awfully
> > small unless 32+ cores are inactive, isn't it?), clock
> > targets that can politely be described as optimistic,
> > and a memory interface far slower than those present in GPUs in a similar FLOPS range?
> >
> > What am I missing?
>
> I don't think you're missing anything. It appears that the Chips and the Cheese
> got to imbibe Tachyum kool aid directly from the fount after which they seem to
> be slightly giddy without being totally inebriated.
>
> Ian Cutress's video piece with the c&c's is basically a waste of time if you read
> the chipsandcheese text.
>
> What we are being presented with now is, in today's tech, for all intents and
> purposes a pretty conventional design. Hopefully they'll have something interesting,
> hopefully they'll have something :) but I'd be amazed (even delighted) if they live
> up to a fraction of their hype.
The vector coprocessors are still very much vliw and denver I don't get how no one's mentioning it. They don't get rob! An rob for such thing would quadruple the size of the entire core.
The cpu part is honestly a glorified microcontroller to issue your vliw you won't need a massive ooo to do that.
It's not a cpu guys, it's a self hosted datacenter accelerator.
Premise is great and absolutely executable, simple really.
> Rayla (rayla.delete@this.example.com) on August 27, 2022 10:35 am wrote:
> > Nobod (Nobod.delete@this.nospam.com) on August 27, 2022 9:21 am wrote:
> > > Chips & Cheese analyzes Tachyum’s Revised Prodigy Architecture
> > >
> > > The new architecture is more traditional and more likely to work. Unfortunately it is trying to address
> > > both HPC and datacenter server markets, but isn’t better than the alternatives at either job.
> >
> > So... A somewhat unbalanced OoO design (gshare predictor, only 96 physical regs), a pair of massive vector
> > units, tiny total caches per core (1MB is fine as an L2, but in the absence of a dedicated L3 it's awfully
> > small unless 32+ cores are inactive, isn't it?), clock
> > targets that can politely be described as optimistic,
> > and a memory interface far slower than those present in GPUs in a similar FLOPS range?
> >
> > What am I missing?
>
> I don't think you're missing anything. It appears that the Chips and the Cheese
> got to imbibe Tachyum kool aid directly from the fount after which they seem to
> be slightly giddy without being totally inebriated.
>
> Ian Cutress's video piece with the c&c's is basically a waste of time if you read
> the chipsandcheese text.
>
> What we are being presented with now is, in today's tech, for all intents and
> purposes a pretty conventional design. Hopefully they'll have something interesting,
> hopefully they'll have something :) but I'd be amazed (even delighted) if they live
> up to a fraction of their hype.
The vector coprocessors are still very much vliw and denver I don't get how no one's mentioning it. They don't get rob! An rob for such thing would quadruple the size of the entire core.
The cpu part is honestly a glorified microcontroller to issue your vliw you won't need a massive ooo to do that.
It's not a cpu guys, it's a self hosted datacenter accelerator.
Premise is great and absolutely executable, simple really.
