Re:Apple’s new M1 Pro and M1 Max processors
by GeekyBear on Monday October 18, 2021 @03:43PM
(#28910592)
> The overall bandwidth isn't affected much by the distance alone.
Testing showed that the M1's performance cores had a surprising amount of memory bandwidth.
>One aspect we’ve never really had the opportunity to test is exactly how good Apple’s cores are in terms of memory bandwidth. Inside of the M1, the results are ground-breaking: A single Firestorm achieves memory reads up to around 58GB/s, with memory writes coming in at 33-36GB/s. Most importantly, memory copies land in at 60 to 62GB/s depending if you’re using scalar or vector instructions. The fact that a single Firestorm core can almost saturate the memory controllers is astounding and something we’ve never seen in a design before.
Re:Apple’s new M1 Pro and M1 Max processors
by fomine3 on Monday October 18, 2021 @10:06PM
(#28914085)
It just said that bandwidth between a performance core and memory controller is great. It's not related to distance between memory controller and DRAM.
Testing showed that the M1's performance cores had a surprising amount of memory bandwidth.
>One aspect we’ve never really had the opportunity to test is exactly how good Apple’s cores are in terms of memory bandwidth. Inside of the M1, the results are ground-breaking: A single Firestorm achieves memory reads up to around 58GB/s, with memory writes coming in at 33-36GB/s. Most importantly, memory copies land in at 60 to 62GB/s depending if you’re using scalar or vector instructions. The fact that a single Firestorm core can almost saturate the memory controllers is astounding and something we’ve never seen in a design before.
https://www.anandtech.com/show/16252/mac-mini-apple-m1-teste...