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:
May. 03, 2005
Filed:
Apr. 04, 2001
Johannes Markus Hoerler, Cary, NC (US);
Francis W. Sweet, Jr., Apex, NC (US);
Joseph Turner, Los Altos, CA (US);
Johannes Markus Hoerler, Cary, NC (US);
Francis W. Sweet, Jr., Apex, NC (US);
Joseph Turner, Los Altos, CA (US);
Cisco Technology, Inc., San Jose, CA (US);
Abstract
A system and technique provides fast acknowledgement and servicing of interrupt sources coupled to a high latency path of an intermediate node of a computer network. An external device coupled to the high latency path is provided with a separate interrupt signal for each type of interrupt supported by a processor of the intermediate node. Each interrupt signal is directly fed to an interrupt multiplexing device over a first low latency path. The multiplexing device is accessible to the processor through a second low latency path. The external device asserts an interrupt by 'pulsing' an appropriate interrupt signal to the multiplexing device. The multiplexing device maintains a current counter for each interrupt signal and increments that counter every time an interrupt pulse is detected. In addition to the counter, the multiplexing device maintains a status bit for each interrupt.