The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 19, 2000
Filed:
Jun. 19, 1998
Alexander Edward Okpisz, Austin, TX (US);
Thomas Albert Petersen, Austin, TX (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
Described is an apparatus for eliminating early retrying of PAAM address conflicts on a system bus with multiple processors connected by a non-master processor, by comparing addresses of the current master processor to the next transaction to be issued by the non-master processor. If the addresses are the same and a PAAM window is detected, the non-master processor will switch the next transaction type to be issued, to a null type transaction. Even though the addresses match, the PAAM window is ignored for a null type transaction. The null transaction type insertion by the non-master processor reduces the latency of a PAAM self retried operation and avoids a possible livelock condition by breaking the processors out of the livelock. This allows the processors to stop retrying and leave the bus. The processors are able to immediately arbitrate instead of delaying past the astat window and increasing bus latency.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile