3 ms·

I'm not sure they're actually doing NVMe yet; using Optane PMem is a bit of a cheat so that accessing storage is just plain memory reads and writes over PCIe. I

I'm not sure they're actually doing NVMe yet; using Optane PMem is a bit of a cheat so that accessing storage is just plain memory reads and writes over PCIe. Implementing an NVMe device driver to set up and interact with command queues would be an extra layer of complexity that I think they left for future work.

magicalhippo 3y ago
Sure, but my point was that it should be quite possible to get regular NVMes working. Once you got that then the CPU is just the orchesterator, and wouldn't necessarily need to be so beefy.
- dragontamer 3y ago
  That's just called DirectStorage and was added as part of Windows 10 (erm.... some update in Windows 10). The PS5 and Xbox both have GPU-access of NVMe Flash. ------ So you are right. But what you are talking about happened like 5 years ago. EDIT: https://devblogs.microsoft.com/directx/directstorage-developer-preview-now-available/ https://devblogs.microsoft.com/directx/directstorage-develop... Looks like 3 years ago for Win10. But I feel like I heard it sooner than that as NVidia or AMD specific API calls.
nine_k 3y ago
Didn't they stop making Optane? :( Also, Optane was like $4 per GB, so a moderately-sized drive, like 256GB, is already above $1000.
- amarcheschi 3y ago
  Yes, Optane isn't produced anymore
- wtallis 3y ago
  The Optane NVMe drives were more like $1-2 per GB when they were new, and are a fair bit cheaper now that they're basically on clearance: https://www.newegg.com/intel-optane-ssd-905p-series-960gb/p/N82E16820167463 https://www.newegg.com/intel-optane-ssd-905p-series-960gb/p/... But this work used the Optane DC Persistent Memory DIMMs that only work with certain Intel server CPUs. I'm not sure what the typical price people actually paid for those was, but it probably was not actually more expensive than DRAM.

3 ms·

I'm not sure they're actually doing NVMe yet; using Optane PMem is a bit of a cheat so that accessing storage is just plain memory reads and writes over PCIe. I

by wtallis 3y ago

magicalhippo 3y ago
Sure, but my point was that it should be quite possible to get regular NVMes working. Once you got that then the CPU is just the orchesterator, and wouldn't necessarily need to be so beefy.
- dragontamer 3y ago
  That's just called DirectStorage and was added as part of Windows 10 (erm.... some update in Windows 10). The PS5 and Xbox both have GPU-access of NVMe Flash. ------ So you are right. But what you are talking about happened like 5 years ago. EDIT: https://devblogs.microsoft.com/directx/directstorage-developer-preview-now-available/ https://devblogs.microsoft.com/directx/directstorage-develop... Looks like 3 years ago for Win10. But I feel like I heard it sooner than that as NVidia or AMD specific API calls.
nine_k 3y ago
Didn't they stop making Optane? :( Also, Optane was like $4 per GB, so a moderately-sized drive, like 256GB, is already above $1000.
- amarcheschi 3y ago
  Yes, Optane isn't produced anymore
- wtallis 3y ago
  The Optane NVMe drives were more like $1-2 per GB when they were new, and are a fair bit cheaper now that they're basically on clearance: https://www.newegg.com/intel-optane-ssd-905p-series-960gb/p/N82E16820167463 https://www.newegg.com/intel-optane-ssd-905p-series-960gb/p/... But this work used the Optane DC Persistent Memory DIMMs that only work with certain Intel server CPUs. I'm not sure what the typical price people actually paid for those was, but it probably was not actually more expensive than DRAM.