F5, Inc.
Pipelined request processing using shared memory

Abstract:

Pipelined request processing using shared memory includes writing, by a first process, data associated with a request and an identifier referencing the data to a shared memory segment. The first process transmits, to a second process, the identifier referencing the data. The second process compares the transmitted identifier to the identifier in the shared memory segment. Responsive to the transmitted identifier matching the identifier in the shared memory segment, the second process updates the identifier in the shared memory segment to indicate that the data has been retrieved by the second process. The comparison and update is performed using an atomic compare-and-swap operation. Using the identifiers prevents race conditions between the different processes in trying to access the data. The second process processes the data to generate a response and transmits the response to the first process.