Patents by Inventor Andrew LUKEFAHR
Andrew LUKEFAHR has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11321604Abstract: Subject matter disclosed herein may relate to storage and/or processing of signals and/or states representative of neural network parameters in a computing device, and may relate more particularly to compressing signals and/or states representative of neural network nodes in a computing device.Type: GrantFiled: June 21, 2017Date of Patent: May 3, 2022Assignees: ARM Ltd., The Regents of the University of MichiganInventors: Jiecao Yu, Andrew Lukefahr, David Palframan, Ganesh Dasika, Reetuparnda Das, Scott Mahlke
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Patent number: 11275996Abstract: Subject matter disclosed herein may relate to storage of signals and/or states representative of parameters in a computing device, and may relate more particularly to storage of signals and/or states representative of neural network parameters in a computing device.Type: GrantFiled: June 21, 2017Date of Patent: March 15, 2022Assignees: ARM Ltd., The Regents of the University of MichiganInventors: Jiecao Yu, Andrew Lukefahr, David Palframan, Ganesh Dasika, Reetuparnda Das, Scott Mahlke
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Patent number: 11264991Abstract: A field-programmable gate array (FPGA) architecture capable of performing immutable hardware Root-of-Trust updates and patches. In embodiments, the architecture utilizes the dielectric breakdown mechanism of magneto tunnel junctions (MTJ) to operate both as: 1) multi-time programmable (MTP) configuration memory for reconfigurable FPGA designs, and 2) one-time programmable (OTP) memory for FPGA Root-of-Trust sections.Type: GrantFiled: November 25, 2020Date of Patent: March 1, 2022Inventors: Andrew Lukefahr, Adam Duncan
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Publication number: 20210159902Abstract: A field-programmable gate array (FPGA) architecture capable of performing immutable hardware Root-of-Trust updates and patches. In embodiments, the architecture utilizes the dielectric breakdown mechanism of magneto tunnel junctions (MTJ) to operate both as: 1) multi-time programmable (MTP) configuration memory for reconfigurable FPGA designs, and 2) one-time programmable (OTP) memory for FPGA Root-of-Trust sections.Type: ApplicationFiled: November 25, 2020Publication date: May 27, 2021Inventors: Andrew Lukefahr, Adam Duncan
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Patent number: 10613866Abstract: A method, apparatus, and CRM that detect repetition of an out-of-order execution schedule for a group of instructions executed by an out-of-order processor. Data indicative of at least one performance metric for an instance of execution of said group of instructions by the out-of-order processor is determined. The determined data are compared with previous data of the at least one performance metric for at least one previous instance of execution of the group of instructions by the out-of-order processor. Repetition of the out-of-order execution schedule is detected dependent on the comparison.Type: GrantFiled: April 4, 2017Date of Patent: April 7, 2020Assignee: The Regents of the University of MichiganInventors: Shruti Padmanabha, Andrew Lukefahr, Reetuparna Das, Scott Mahlke
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Patent number: 10310858Abstract: Apparatus and a corresponding method for controlling a transition between use of first processing circuitry and second processing circuitry to execute program instructions are provided. Transition monitoring storage selects an entry for a load program instruction executed during the transition in dependence on a memory address from which a value is to be loaded and stores a program order timestamp for the load program instruction, unless a valid previously stored program order timestamp in the entry precedes the program order timestamp. Thus the oldest timestamp of an load instruction executed in the transition is held. At either the start or end (or both) of the transition the content of the transition monitoring storage is cleared.Type: GrantFiled: March 8, 2016Date of Patent: June 4, 2019Assignee: The Regents of the University of MichiganInventors: Andrew Lukefahr, Shruti Padmanabha, Reetuparna Das, Scott Mahlke, Jiecao Yu
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Publication number: 20180373975Abstract: Subject matter disclosed herein may relate to storage and/or processing of signals and/or states representative of neural network parameters in a computing device, and may relate more particularly to compressing signals and/or states representative of neural network nodes in a computing device.Type: ApplicationFiled: June 21, 2017Publication date: December 27, 2018Inventors: Jiecao Yu, Andrew Lukefahr, David Palframan, Ganesh Dasika, Reetuparnda Das, Scott Mahlke
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Publication number: 20180373978Abstract: Subject matter disclosed herein may relate to storage of signals and/or states representative of parameters in a computing device, and may relate more particularly to storage of signals and/or states representative of neural network parameters in a computing device.Type: ApplicationFiled: June 21, 2017Publication date: December 27, 2018Inventors: Jiecao Yu, Andrew Lukefahr, David Palframan, Ganesh Dasika, Reetuparnda Das, Scott Mahlke
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Publication number: 20180285111Abstract: A method of detecting repetition of an out-of-order execution schedule for a group of instructions executed by an out-of-order processor, said method comprising: determining data indicative of at least one performance metric for an instance of execution of said group of instructions by said out-of-order processor; performing a comparison of said determined data with previous data of said at least one performance metric for at least one previous instance of execution of said group of instructions by said out-of-order processor; and detecting repetition of said out-of-order execution schedule dependent on said comparison, a corresponding apparatus and non-transitory computer-readable medium.Type: ApplicationFiled: April 4, 2017Publication date: October 4, 2018Inventors: Shruti PADMANABHA, Andrew LUKEFAHR, Reetuparna DAS, Scott MAHLKE
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Patent number: 9965279Abstract: An apparatus for processing data includes first execution circuitry, such as an out-of-order processor, and second execution circuitry, such as an in-order processor. The first execution circuitry is of higher performance but uses more energy than the second execution circuitry. Control circuitry switches between the first execution circuitry being active and the second execution circuitry being active. The control circuitry includes prediction circuitry which is configured to predict a predicted identity of a next sequence of program instructions to be executed in dependence upon a most recently executed sequence of program instructions and then in dependence upon this predicted identity to predict a predicted execution target corresponding to whether the next sequence of program instructions should be executed by the first execution circuitry or the second execution circuitry.Type: GrantFiled: November 29, 2013Date of Patent: May 8, 2018Assignee: The Regents of the University of MichiganInventors: Shruti Padmanabha, Andrew Lukefahr, Reetuparna Das, Scott Mahlke
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Patent number: 9870226Abstract: A data processing apparatus includes a first execution mechanism, such as an out-of-order processing circuitry, and a second execution mechanism 6 such as an in-order processing circuitry. Switching control circuitry controls switching between which of the first execution circuitry and the second execution circuitry is active at a given time. Latency indicating signals indicative of the latency associated with a candidate switching operation to be performed are supplied to the switching control circuitry and used to control the switching operation. The control of the switching operation may be to accelerate the switching operation, prevent the switching operation, perform early architectural state data transfer or other possibilities.Type: GrantFiled: July 3, 2014Date of Patent: January 16, 2018Assignee: The Regents of the University of MichiganInventors: Shruti Padmanabha, Andrew Lukefahr, Reetuparna Das, Scott Mahlke
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Publication number: 20170262285Abstract: Apparatus and a corresponding method for controlling a transition between use of first processing circuitry and second processing circuitry to execute program instructions are provided. Transition monitoring storage selects an entry for a load program instruction executed during the transition in dependence on a memory address from which a value is to be loaded and stores a program order timestamp for the load program instruction, unless a valid previously stored program order timestamp in the entry precedes the program order timestamp. Thus the oldest timestamp of an load instruction executed in the transition is held. At either the start or end (or both) of the transition the content of the transition monitoring storage is cleared.Type: ApplicationFiled: March 8, 2016Publication date: September 14, 2017Inventors: Andrew LUKEFAHR, Shruti PADMANABHA, Reetuparna DAS, Scott MAHLKE, Jiecao YU
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Patent number: 9639363Abstract: A processor core includes a front end, and first and second back ends, the front end including a fetch engine configured to retrieve the sequence of data processing instructions for both the first back end and the second back end from a memory, and the first and second back ends are each configured to execute the sequence of program instructions. The core operates in a first mode in which the first back end is active and receives the sequence of data processing instructions from the fetch engine and the second back end is inactive, and a second mode in which the first back end is inactive and the second back end is active and receives the sequence of data processing instructions from the fetch engine, where the cycles-per-instruction rate is lower and energy consumption is higher for the first mode than the second mode.Type: GrantFiled: November 29, 2013Date of Patent: May 2, 2017Assignee: The Regents of the University of MichiganInventors: Andrew Lukefahr, Reetuparna Das, Shruti Padmanabha, Scott Mahlke
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Publication number: 20160004534Abstract: A data processing apparatus 2 includes a first execution mechanism 4, such as an out-of-order processing circuitry, and a second execution mechanism 6 such as an in-order processing circuitry. Switching control circuitry 24 controls switching between which of the first execution circuitry 4 and the second execution circuitry 6 is active at a given time. Latency indicating signals indicative of the latency associated with a candidate switching operation to be performed are supplied to the switching control circuitry 24 and used to control the switching operation. The control of the switching operation may be to accelerate the switching operation, prevent the switching operation, perform early architectural state data transfer or other possibilities.Type: ApplicationFiled: July 3, 2014Publication date: January 7, 2016Inventors: Shruti PADMANABHA, Andrew LUKEFAHR, Reetuparna DAS, Scott MAHLKE
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Publication number: 20150154021Abstract: An apparatus 2 for processing data includes first execution circuitry 4, such as an out-of-order processor, and second execution circuitry 6, such as an in-order processor. The first execution circuitry 4 is of higher performance but uses more energy than the second execution circuitry 6. Control circuitry 24 switches between the first execution circuitry 4 being active and the second execution circuitry 6 being active. The control circuitry includes prediction circuitry which is configured to predict a predicted identity of a next sequence of program instructions to be executed in dependence upon a most recently executed sequence of program instructions and then in dependence upon this predicted identity to predict a predicted execution target corresponding to whether the next sequence of program instructions should be executed by the first execution circuitry or the second execution circuitry.Type: ApplicationFiled: November 29, 2013Publication date: June 4, 2015Applicant: THE REGENTS OF THE UNIVERSITY OF MICHIGANInventors: Shruti Padmanabha, Andrew Lukefahr, Reetuparna Das, Scott Mahlke
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Publication number: 20150121048Abstract: A processor core includes a front end, and first and second back ends, the front end including a fetch engine configured to retrieve the sequence of data processing instructions for both the first back end and the second back end from a memory, and the first and second back ends are each configured to execute the sequence of program instructions. The core operates in a first mode in which the first back end is active and receives the sequence of data processing instructions from the fetch engine and the second back end is inactive, and a second mode in which the first back end is inactive and the second back end is active and receives the sequence of data processing instructions from the fetch engine, where the cycles-per-instruction rate is lower and energy consumption is higher for the first mode than the second mode.Type: ApplicationFiled: November 29, 2013Publication date: April 30, 2015Applicant: THE REGENTS OF THE UNIVERSITY OF MICHIGANInventors: Andrew LUKEFAHR, Reetuparna DAS, Shruti PADMANABHA, Scott MAHLKE