Implementing storage adapter performance control

摘要

A method and controller for implementing storage adapter performance control, and a design structure on which the subject controller circuit resides are provided. The controller includes a performance state machine controlling the use of a performance path and a normal or error recovery path in a storage adapter firmware stack. The performance state machine determines which storage resources are allowed to use the performance path and properly transitions the running of each storage resource to and from the performance path and normal path mode of operation.

主权项

1. A data storage system comprising:
a controller comprising a performance state machine for controlling the use of a performance path and a normal or error recovery path in a storage adapter firmware stack; the performance path including set of predefined I/O operations using predefined hardware assist functions; the normal or error recovery path including any function in violation of a performance path mode of operation; said performance state machine determining each storage resource allowed to use the performance path; and said performance state machine transitioning running of at least one of said storage resource allowed to use the performance path to and from the performance path and normal path mode of operation responsive to identifying at least one predefined event.