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:
Feb. 09, 2010
Filed:
Nov. 01, 2007
Jimmie Earl Dewitt, Jr., Georgetown, TX (US);
Riaz Y. Hussain, Austin, TX (US);
Frank Eliot Levine, Austin, TX (US);
Robert John Urquhart, Austin, TX (US);
Jimmie Earl DeWitt, Jr., Georgetown, TX (US);
Riaz Y. Hussain, Austin, TX (US);
Frank Eliot Levine, Austin, TX (US);
Robert John Urquhart, Austin, TX (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A method, system, apparatus, and computer program product is presented for tracing operations. A set of related methodologies can be used within instruction tracing software, such as a tracing program, to reduce its tendency to generate interrupts that cause unwanted effects in the system that is being captured. A first methodology allows access to protected memory blocks so that instructions may be read from those memory blocks. A second methodology provides for the trace output buffer to be accessed using physical addressing. A third methodology traces only instruction addresses, which are resolved later during a post-processing phase of operation. A fourth methodology comprises multiple different methods for obtaining copies of instructions that have already executed rather than obtaining them before they are executed.