What systems will have CXL?
What systems will have CXL?
Posted Apr 11, 2025 21:02 UTC (Fri) by epa (subscriber, #39769)In reply to: kmalloc by willy
Parent article: Management of volatile CXL devices
I believe Apple’s systems — at least their laptops — have CPU and memory in a single package. Apple manufacture versions with more RAM on the die, and sell them dearer; but eventually must reach the point where it’s not feasible to cram more memory into the same package. I can imagine them starting to sell systems with ‘hybrid’ memory, some faster and some not quite as fast, just as for a time Apple marketed computers with a large hard disk and small SSD.
Posted Apr 11, 2025 21:08 UTC (Fri)
by willy (subscriber, #9762)
[Link]
The relative latency, the relative bandwidth, the relative capacities all drive towards different solutions. That's why it's so unhelpful when the CXL advocates bring up HBM as an example.
What systems will have CXL?
Yes, I can imagine all kinds of possible systems. The problem is that the right answer for "how do we use this" is very different between 8GB of HBM + 64GB of DRAM vs 256GB of DRAM + 128GB of CXL.