Now that i had some time to look over it,
Would you say that single ZEN core will have more Integer throughput vs Excavator Module because of the lower latency and faster caches/memory + higher IPC and no CMT penalty although it has 2x less AGUs ??
Excavator Module
8x Integer Pipes / 4x ALUs and 4x AGUs
ZEN core
6x Integer pipes / 4x ALUs and 2x AGUs
How much of the latency reduction need to be done in order to compensate 2 AGUs?
And we need to remember, that Zen needs to compete with Skylake and beyond, not with Excavator.
P.S. Haha, nearly 10 years ago registered, 1st post today...
Yep. I've planned to provide more stuff over the next days. Just wanted to get that out first after discovering the patch 2 days ago. Now I need some sleep (3am here).
How much of the latency reduction need to be done in order to compensate 2 AGUs?
And we need to remember, that Zen needs to compete with Skylake and beyond, not with Excavator.
P.S. Haha, nearly 10 years ago registered, 1st post today...
Now that i had some time to look over it,
Would you say that single ZEN core will have more Integer throughput vs Excavator Module because of the lower latency and faster caches/memory + higher IPC and no CMT penalty although it has 2x less AGUs ??
Excavator Module
8x Integer Pipes / 4x ALUs and 4x AGUs
ZEN core
6x Integer pipes / 4x ALUs and 2x AGUs
Have you been driven out ofAMDZone2Semi-Accurate's forums by Internet STRONGMAN Juanrga?
I am sceptical... nothing is too perfect than Intel (according to Shintai), and even if that is true, we need to see at what max GHZ can run it.
Margins and there is the risk that Intel can screw Apple somehow due their ARM chips.Apple designing hardware after they started purchasing Intel and discrete graphic cards? The market is too volatile for them to risk that kind of money. I think they are perfectly happy purchasing hardware tried and proven on the market as demand is needed.
"Some patents suggest, that Zen might use some slightly modified Excavator branch prediction."
If my memory serves, I recall that K8 and the Phenoms were often said to have poor branch prediction. And bulldozer was supposed to completely revamp the branch prediction.
I also seem to remember that Intel worked a lot on this with Pentium 4, and it added its work back into the P3 architecture and that became Conroe. Is this true?
It wasn't just branch prediction, though, that Conroe took from P4. But I can't remember the rest.
Have you been driven out ofAMDZone2Semi-Accurate's forums by Internet STRONGMAN Juanrga?
Internet STRONGMEN arent only found in S/A it seems.
Look at the executional resources on that thing! Zen got back(end).
Looking at the projected FMAC design, I have to wonder: is Zen going to struggle with 256-bit SIMD instructions the same way that PD/SR/XV do some of the time? For those processors, 256-bit SIMD instructions (AVX, AVX2 for XV) have to be split into two 128-bit instructions before they can be used. When all else fails, that can be done in hardware, albeit at a performance penalty.
They don't struggle they do it over two cycles, what it means is assuming you have code that can execute a 256bit vector every cycle it would have 1/2 the throughput per core of a haswell> core. The performance penalty for this(fast double) is tiny as its just another mop its the throughput that's hurt. But if you have sequential dependent instructions ZEN should be better because of the reduced instruction latency.
I see what you're saying, but it still still stinks when XV (for example) runs stuff like y-cruncher faster with SSE3 than it does AVX (for example). There are circumstances where Zen is going to run into AVX2 code aimed at Intel chips, and it would be nice if Zen could handle those instructions without suffering a loss of throughput. XV can't do that.
Ok, I give up..
AMD's Zen core (family 17h) to have ten pipelines per core http://dresdenboy.blogspot.com/
https://benchlife.info/amd-ex-cpu-master-jim-keller-join-tesla-for-autopilot-hardware-01292016/
After speculation, Jim Keller ended up with Tesla as a VP for autopilot development.
Good for Jim. Tesla seems to be the new and exciting Frontier.
A postponement of K12 could have caused that. One wants to do something new and would still have to wait longer than anticipated with finishing the current project..Looks like AMD soured this dude on chips altogether
Looks like AMD soured this dude on chips altogether