Non-volatile storage subsystem with energy-based performance throttling

摘要

A non-volatile storage subsystem regulates energy consumption by controlling or “throttling” the rate at which memory operations are performed. During relatively idle periods in which few or no memory operations are performed, energy allotments or “counts” are accumulated to reflect unused energy. These accumulated energy counts may then be effectively allocated for use during bursts or other periods of relatively heavy memory activity, such that the memory operations are performed at a relatively high rate without causing a maximum average power consumption to be exceeded.

主权项

1. A data storage system capable of regulating energy consumption by controlling memory operations, the data storage system comprising:
a non-volatile memory array; and a controller configured to:
access the non-volatile memory array in response to commands received from a host system;maintain energy count data representing accumulated energy counts available for performing memory operations in the non-volatile memory array, the energy count data reflecting at least (1) the energy counts accrued at a rate over time up to a maximum energy count and (2) energy consumed by actual memory operations;adjust, based at least on sensor data reflective of environmental conditions associated with at least one of the non-volatile memory array and the controller, at least one of (1) the rate of accrual of the energy counts and (2) the maximum energy count; andcontrol a rate or timing at which the memory operations are performed in the non-volatile memory array based at least on the energy count data and the sensor data.