I'll bite. What data do you need to get onto a smartphone at that rate? And what mechanism do you have able to feed it that quickly? How do you know it's storage contrained rather than CPU or network?
If the write speeds of storage are only 230MB/sec how slow are the random writes? Few MB/sec? This is now the slowest part of the phone, slowing down app installs and general usage of the phone.
The hot/cold thing is cool--you can reduce GC/write amplification if you mostly have long-lived data in some Flash erase blocks and shorter-lived data in others, because you don't rewrite long-lived blocks a lot (or, from the other end, because the short-lived are mostly garbage by GC time).
I wonder if this is relying on the OS for hints, and if there's potential cross-application in NVMe land. Slow writes you expect to be long-lived could skip an SLC cache and leave it for bursty traffic, for instance.
You could probably get a bit of the benefit just from structuring background GC right so that the oldest blocks rewritten in a GC all end up together. Wouldn't surprise me if this is already done.
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Xex360 - Wednesday, June 21, 2023 - link
Doesn't the Galaxy S23 Ultra uses UFS 4.0?Gustavoar - Wednesday, June 21, 2023 - link
Not by Micronshabby - Wednesday, June 21, 2023 - link
My s23 only gets 1000MB read and 230MB write.dontlistentome - Wednesday, June 21, 2023 - link
2007 called, it wants it's 3MB/sec back.shabby - Wednesday, June 21, 2023 - link
Wat?dontlistentome - Wednesday, June 21, 2023 - link
Describing tiny storage buried deep inside a small device that fits in your pocket as 'only' when it does a gigaBYTE a second.shabby - Wednesday, June 21, 2023 - link
I'm paying premium for these devices, I expect premium components. And 230MB/sec write speeds is laughable.dontlistentome - Thursday, June 22, 2023 - link
I'll bite. What data do you need to get onto a smartphone at that rate? And what mechanism do you have able to feed it that quickly? How do you know it's storage contrained rather than CPU or network?shabby - Thursday, June 22, 2023 - link
If the write speeds of storage are only 230MB/sec how slow are the random writes? Few MB/sec? This is now the slowest part of the phone, slowing down app installs and general usage of the phone.iphonebestgamephone - Monday, June 26, 2023 - link
Username cheks outgagegfg - Monday, June 26, 2023 - link
Galaxy Note 10 plus UFS 2.1 512 GB. 1500/1200 MBps read/write.ceisserer - Wednesday, June 21, 2023 - link
wouldn't these UFS chips a way to create super-fast, yet tiny USB drivers?shabby - Wednesday, June 21, 2023 - link
Not really, at least on Samsung phones the USB port is really slow, almost usb2 speeds.iphonebestgamephone - Monday, June 26, 2023 - link
If it were usb 2 speeds how is it able to 4k 60 output via hdmi??shabby - Wednesday, June 21, 2023 - link
Oh you mean actual usb drives, unlikely since they're not cheap, current crop of usb drives use the cheapest nand available.twotwotwo - Wednesday, June 21, 2023 - link
The hot/cold thing is cool--you can reduce GC/write amplification if you mostly have long-lived data in some Flash erase blocks and shorter-lived data in others, because you don't rewrite long-lived blocks a lot (or, from the other end, because the short-lived are mostly garbage by GC time).I wonder if this is relying on the OS for hints, and if there's potential cross-application in NVMe land. Slow writes you expect to be long-lived could skip an SLC cache and leave it for bursty traffic, for instance.
You could probably get a bit of the benefit just from structuring background GC right so that the oldest blocks rewritten in a GC all end up together. Wouldn't surprise me if this is already done.