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:
Apr. 21, 2015
Filed:
Aug. 23, 2011
Valentin Gherman, Palaiseau, FR;
Yannick Bonhomme, Breuillet, FR;
Valentin Gherman, Palaiseau, FR;
Yannick Bonhomme, Breuillet, FR;
Abstract
A method for online testing pipeline systems comprising a succession of stages separated by buffers each associated with an idle signal, or idle signal, and/or at least one status bit, comprising: detecting values of the idle signal and/or the corresponding status bits indicating the availability of a cycle or the abrupt interruption of the flow of operations in a pipeline, and indicating that a valid operation, executed by a stage in the pipeline, is followed by an unused cycle; maintaining the state of the buffer in order to allow said valid operation to be re-executed during the unused cycle indicated by said idle signal; re-executing, during the unused cycle, the valid operation, in order to obtain at least a first version and a second version of said valid operation; memorizing, at the output of the pipeline, the results that correspond to the first version of said repeated or re-executed operation, in order to compare with the results of said second version of the same repeated or re-executed operation; and comparing the results obtained at the output of the pipeline, which results correspond to the first version and the second version, and, if there is a difference, indicating an error.