Reducing solid state Storage device read tail latency
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United States of America Patent
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Issued Date -
Feb 21, 2019
app pub date -
Aug 15, 2018
filing date -
Aug 15, 2018
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Abstract
A storage device, infrastructure, and associated method for managing request queue to reduce read tail latencies. A disclosed storage device is disclosed that includes: a set of flash memory chips; and a controller that schedules request from a host using a set of request queues, wherein the controller includes a queue manager that: reorders high priority read requests over low priority write requests in each request queue; suspends low priority write requests to process high priority read requests; and limits a number of low priority write requests allowed in each request queue to a threshold value smaller than a size of each request queue.
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