[mbjorling]

One thread issuing IOs: A reduction of 2x in the IO path latency isn't unusual. The overhead of the code path drops from 5us to around 2us. When there's multiple IO threads, the gain is much higher (to 38x in the 8 socket setup). Thus, the more complex workload, the better performance.

I don't have any up-to-date numbers on CPU usage. When we did the experiments on the mtip drive, it was around 20% less CPU usage when performing roughly the same IOs.

For a typical workstation workload, the SSDs access times are still too high to feel the reduced latency. A typical modern SSD is around 50-100us for an IO access. The win there will be the lesser CPU usage that free up resources for other things to do.

Applications are still bound by the round-trip time of getting IOs. Just because we get more memory, we still have to persist data at intervals to prevent data loss, and everything that can help in decreasing the overhead is a win.