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I think a lot of the problem is that the ssd is fast enough and far enough away that by the time you get a response back it's fairly out of date


This was solved in networking by having the device collect a histogram of queue occupancy.


That’s a separate concern.

Every command that you issue to the ssd returns a response. It would be nice to have a bunch of performance counters that tell us where the time went with each of the commands we give it.

GPUs have this already.




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