08015379 is referenced by 22 patents and cites 141 patents.

A wake-and-go mechanism is configured to issue a look-ahead load command on a system bus to read a data value from a target address and perform a comparison operation to determine whether the data value at the target address indicates that an event for which a thread is waiting has occurred. In response to the comparison resulting in a determination that the event has not occurred, the wake-and-go engine populates the wake-and-go storage array with the target address. In response to the comparison resulting in a determination that the event has occurred, the wake-and-go engine issues a load command on the system bus to read the data value from the target address with data exclusivity and determines whether the wake-and-go engine obtains a lock for the target address. Responsive to obtaining the lock for the target address, the wake-and-go engine holds the lock for the thread.

Title
Wake-and-go mechanism with exclusive system bus response
Application Number
12/24250
Publication Number
8015379 (B2)
Application Date
February 1, 2008
Publication Date
September 6, 2011
Inventor
Randal C Swanberg
Round Rock
TX, US
Satya P Sharma
Austin
TX, US
Ravi K Arimilli
Austin
TX, US
Agent
Matthew B Talpis
Stephen J Walder Jr
Stephen R Tkacs
Assignee
International Business Machines Corporation
NY, US
IPC
G06F 12/00
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