Persistent local storage for processor resources

摘要

Local storage may be allocated for each processing resource in a process of a computer system. Each processing resource may be virtualized and may have a one-to-one or a many-to-one correspondence with with physical processors. The contents of each local storage persist across various execution contexts that are executed by a corresponding processing resource. Each local storage may be accessed without synchronization (e.g., locks) by each execution context that is executed on a corresponding processing resource. The local storages provide the ability to segment data and store and access the data without synchronization. The local storages may be used to implement lock-free techniques such as a generalized reduction where a set of values is combined through an associative operator.

主权项

1. A method performed by a scheduler in a process executing on a computer system, the method comprising:
allocating first local storage corresponding to a first processing resource of the scheduler; allowing first and second execution contexts that execute on the first processing resource at different times to access the first local storage without synchronization; accessing the first local storage with the first execution context on the first processing resource; subsequent to accessing the first local storage with the first execution context, blocking the first execution context on the first processing resource to allow a third execution context on a second processing resource to access the first local storage, the third execution context accessing the first local storage while executing on the second processing resource; and in response to said blocking:
maintaining data in the first local storage; andsaving state information of the first execution context to a memory external to the first processing resource without saving the data from the first local storage to the memory external to the first processing resource.