Balanced die set execution in a data storage system

A system comprising a quality of service module connected to a first die set and a second die set of a semiconductor memory, the quality of service module configured to measure performance metrics of execution of a first data access command to the first die set and of a second data access command to a second die set, a prediction circuit of the quality of service module generates a proactive strategy to maintain consistent data access command execution performance with a quality of service module based on the measured performance metrics, a scheduler circuit of the quality of service module is configured to alter a third data access command as directed by the proactive strategy to prevent a predicted non-uniformity of data access command performance between the first die set and the second die set.