SYSTEM AND METHOD FOR CONSISTENT PERFORMANCE IN A STORAGE DEVICE

摘要

A system and method for providing consistent performance in a storage device, such as a solid state drive. A threshold value for command execution time for a command in a category of command (e.g., a read command or a write command) and a command size, is stored in the storage device. When a host command in the category (e.g., a read command) and corresponding size is received, the storage device executes the command, and if it completes execution of the command in a time that is less than the threshold value, the solid state drive waits until an amount of time equal to the threshold value has elapsed before sending the command completion.

主权项

1. A solid state drive, comprising:
a controller; and a plurality of non-volatile memory devices, the controller comprising:
a performance manager comprising a first threshold value register; anda host control to:
receive a command from a host, the command being a read command or a write command; andsend, upon instruction from the performance manager, a command completion to the host, the performance manager being to:
monitor an elapsed time after receipt of the command; andinstruct the host control to send a command completion to the host when the elapsed time equals or exceeds a value stored in the first threshold value register.