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. 28, 2004
Filed:
Aug. 30, 2000
Applicant:
Inventors:
Donald C. Englin, Shoreview, MN (US);
Kelvin S. Vartti, Hugo, MN (US);
Assignee:
Unisys Corporation, Blue Bell, PA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06F 1/200 ;
U.S. Cl.
CPC ...
G06F 1/200 ;
Abstract
An apparatus for and method of queuing memory access requests resulting from level two cache memory misses. The requests are preferably queued separately by processor. To provide the most recent data to the system, write (i.e., input) requests are optimally given preference over read (i.e., output) requests for input/output processors. However, instruction processor program instruction fetches (i.e., read-only requests) are preferably given priority over operand transfers (i.e., read/write requests) to reduce instruction processor latency.