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:
Jan. 29, 1985
Filed:
Oct. 19, 1982
Roger L Cormier, Pleasant Valley, NY (US);
Robert J Dugan, Hyde Park, NY (US);
Richard R Guyette, Hopewell Junction, NY (US);
Ronald L Hankison, Poughkeepsie, NY (US);
Ming C Hao, Chappaqua, NY (US);
Arthur L Levin, Pleasant Valley, NY (US);
George A McClain, Delray Beach, FL (US);
Paul J Wanish, Poughkeepsie, NY (US);
Carl Zeitler, Jr, Poughkeepsie, NY (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A channel for a data processing system is provided with a time of day clock that is synchronized with the time of day clock of the associated central processor. Both the central processor and the channel processor record times of particular events, and the channel uses these times to calculate two times called Function Pending and Function Active. Both times begin when the central processor executes an instruction to begin an I/O operation. Function Pending ends when the channel has made successful initial selection. This time shows delays by the channel processor in scheduling the channel control unit, and device resources for I/O operations. Function Active ends at Channel End. A new instruction, Set Channel Monitor, enables or disables these measurements. An information block for each subchannel defines one of several measurement modes for a subchannel or disables the subchannel from measurement.