Originally posted by sdack
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Intel i9-12900K Alder Lake Linux Performance In Different P/E Core Configurations
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At the end of the day, Alder Lake is a new platform and you're paying the early adopter penalty and tax in every way. For what? To set some benchmarks? F***ing lol.
Yeah, let me buy this super fast CPU, and then undervolt it right away, tinker with this and that BIOS settings, disable this E core, do this, do that.
Or, buy an established Zen 3. Enable XMP, PBO Auto. Done. No problems.
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ARM as well as Apple have been using BIG-little designs for many years now. AMD has been rumored to migrate to a BIG-little uArch as well somewhere in the future. Maybe what Intel has implemented is not that bad after all. Maybe if the Linux kernel properly supported ADL CPUs we wouldn't have such a salty conversation.
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Originally posted by Markopolo View Post
I wonder this as well. The scheduler issues are significant though. Look at the average power consumption for the two scenarios. P only was 50% more power. That’s significant enough to make me hesitant to compare the performance. Also keep in mind intel said that one P core has the same size as 4(!) E cores
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Originally posted by birdie View Post
Looks like your final line of "reasoning" here is insults and I prefer to talk to civil and rational people instead.
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Just putting it out there, SAM is not the same thing as re-sizable bar. Resizable bar is just the optional part of the PCI'e spec that allows you specify whatever sized chunks from PCI'e, things like "smart access memory" from AMD is resizable bar + specific optimizations for CPU + tweaks for games.
The last bit is quite important because in quite a few games, enabling resizable bar actually slows the game down (and in some cases this slow down is non negligible, i.e. > 10%). The reason why AMD is ahead than Intel here is because they have done the necessary tweaking
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Originally posted by birdie View PostARM as well as Apple have been using BIG-little designs for many years now. AMD has been rumored to migrate to a BIG-little uArch as well somewhere in the future. Maybe what Intel has implemented is not that bad after all. Maybe if the Linux kernel properly supported ADL CPUs we wouldn't have such a salty conversation.
The idea of hybrid designs is certainly not bad. What is bad is not to have the software ready on release to benefit from it as there is evidently much to gain from it.
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Originally posted by birdie View PostARM as well as Apple have been using BIG-little designs for many years now. AMD has been rumored to migrate to a BIG-little uArch as well somewhere in the future. Maybe what Intel has implemented is not that bad after all. Maybe if the Linux kernel properly supported ADL CPUs we wouldn't have such a salty conversation.
*Windows RT 8.0 release only. RT 8.1 was badly broken.
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Originally posted by sdack View PostAMD's Zen CPUs are not as uniform as people think. Only AMD hides the details and presents a uniform multi-core CPU. One can certainly find cases where AMD's design shows weaknesses, but I have not yet seen anything as worrying as was shown here with Alder Lake.
The idea of hybrid designs is certainly not bad. What is bad is not to have the software ready on release to benefit from it as there is evidently much to gain from it.
This is because knowing what should run on an e-core and what should run on a p-core is primarily a subjective thing, its when making something deliberately slower but to save power is acceptable which depends on the context of the application.
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Originally posted by Grinness View Post
Back in to your rat hole
Fact remains that for all the benchmarks Michael has done about Linux having better performance over Windows, they simply don't carry forward to real-world computing. Till now nobody can provide a reasonable explanation as to why Windows boots, launches programs and generally respond to application inputs faster than Linux on the same hardware, especially on low-power hardware like Atoms.
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