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:
Nov. 24, 2015
Filed:
Nov. 25, 2014
International Business Machines Corporation, Armonk, NY (US);
Scott M. Carlson, Tucson, AZ (US);
Daniel F. Casper, Poughkeepsie, NY (US);
John R. Flanagan, Poughkeepsie, NY (US);
Roger G. Hathorn, Tucson, AZ (US);
Matthew J. Kalos, Tucson, AZ (US);
Louis W. Ricci, Hyde Park, NY (US);
Gustav E. Sittmann, III, Webster Groves, MO (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A computer program product is provided for performing a method that includes receiving a command message at a control unit from a channel subsystem in a host computer system, the command message including a command for data to be transferred from the host computer system to an I/O device. The method also includes receiving a data transfer message at the control unit, the data transfer message having an amount of the data to be transferred that is less than or equal to a maximum amount of data, the maximum amount of data corresponding to a number of buffers associated with the control unit and a size of each of the number of buffers, the number of buffers indicated by a buffer credit value maintained in the host computer system, and the size indicated by a buffer size value sent from the control unit and maintained in the host computer system.