The Silicon Motion SM2262EN SSD Controller Preview: Good And Bad Amplifiedby Billy Tallis on August 1, 2018 11:45 AM EST
AnandTech Storage Bench - The Destroyer
The Destroyer is an extremely long test replicating the access patterns of very IO-intensive desktop usage. A detailed breakdown can be found in this article. Like real-world usage, the drives do get the occasional break that allows for some background garbage collection and flushing caches, but those idle times are limited to 25ms so that it doesn't take all week to run the test. These AnandTech Storage Bench (ATSB) tests do not involve running the actual applications that generated the workloads, so the scores are relatively insensitive to changes in CPU performance and RAM from our new testbed, but the jump to a newer version of Windows and the newer storage drivers can have an impact.
We quantify performance on this test by reporting the drive's average data throughput, the average latency of the I/O operations, and the total energy used by the drive over the course of the test.
The Silicon Motion SM2262EN offers no improvement over the base SM2262 on The Destroyer, with an average data rate that is slightly below the HP EX920. These SMI controllers are providing performance that is well below the current standard for high-end NVMe drives.
The average latency of the SM2262EN is only slightly worse than the HP EX920, but the 99th percentile latency has regressed more significantly into low-end NVMe territory.
The average latency regression is due to degraded read latency, while average write latency has actually improved, though not to the point of being competitive with other high-end NVMe SSDs.
The 99th percentile read and write latencies are both worse for the SM2262EN than for the HP EX920, but the write latency is clearly the bigger problem with a larger overall value and a more significant regression.
The energy usage of the SM2262EN during The Destroyer is a bit higher than for the HP EX920, which already used rather a lot of energy for not delivering high-end performance. The SM2262EN doesn't quite surpass the smallest, slowest SM2262 drive.