For perspective, Apple's A12 chip uses the exact same process with almost the same die area as a chiplet. Shallow searching didn't turn up anything on how much Apple bins, or how much redundancy they put into their chip, but their relatively high standards for hardware gives me the impression...
First of all, the unit of measure here should be instructions. The cpu doesn't execute "cycles" it executes instructions. The cpu can take a variable number of clock cycles to execute different instructions.
Second, everyone wishes branch prediction is that easy. What if you execute the code in...
That paper is about researching alternatives to the current method of speculative execution (branch prediction). I didn't see any mention of any commercial cpus that use decoupled-look ahead.
Also please read a textbook. The way OoOE and ILP are implemented in current architectures is based off...
Please read my post in its entirety. I'm aware that it has nothing to do with the programmer, but the person I quoted claimed there were instructions to execute stuff in parallel or out of order.
Also, the cpu doesn't "look ahead 100 cycles"; that makes no sense. All out of order execution and...
My mistake; SMT executes instructions from all threads all the time; not just when one thread stalls.
That's what I said. And it doesn't change my point that more smt requires a better frontend that would be more expensive.
Just to clarify though, does x86 have instructions to explicitly...
After some more reading, you are correct. However that doesn't save the decoders work of decoding the instruction into uops.
Edit: I've conflated prefetching with decoding. Both prefetch/fetch and decode need to know the instruction length and boundaries. Decode on top of that needs to...
Variable length x86 instructions really do make prefetch and decode very expensive because of how difficult it is to tell where the boundaries are between one instruction and the next. That is why both AMD and Intel have uop caches to reduce the load on the decoder, and decode already has the...
There's no way SMT4 would work well on x86. Decoding x86 is already ridiculously expensive and a decoder/uop cache fast enough for 4 threads per core would be too expensive.
From my perspective it just sounds like Bulldozer all over again.
The reason other architectures were able to implement...
Why does it seem like bad business to have found a way to produce products more efficiently? The industry has been researching using a chiplet strategy to address increasing node costs, and it seems that AMD beat everyone (as far as I know) to the punch. Even better, they used it to increase...
Have you forgotten the chip Lisa Su held up at CES? Or her statements saying that we could expect more than 8 cores coming to Ryzen? FFS stop obsessing about whatever TV you watch and read more.
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