Patents by Inventor James S. ISMAIL
James S. ISMAIL 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: 11934240Abstract: Techniques are disclosed relating to thermal control implemented by a power management unit. In some embodiments, the power management unit itself is configured to monitor thermal conditions, implement control for one or more thermal loops, and send reduction alerts, via an inter-chip interconnect, to the processor circuitry it powers. In some embodiments, the power management unit implements both thermal and electromigration control loops. Disclosed techniques may advantageously reduce or avoid thermal issues, potentially with reduced impact on processor performance relative to traditional techniques.Type: GrantFiled: May 18, 2022Date of Patent: March 19, 2024Assignee: Apple Inc.Inventors: Inder M. Sodhi, Achmed R. Zahir, Carmel Yamberger, Daniele Perretta, Jan Krellner, Ron Neuman, James S. Ismail, Keith Cox
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Publication number: 20230376091Abstract: Techniques are disclosed relating to thermal control implemented by a power management unit. In some embodiments, the power management unit itself is configured to monitor thermal conditions, implement control for one or more thermal loops, and send reduction alerts, via an inter-chip interconnect, to the processor circuitry it powers. In some embodiments, the power management unit implements both thermal and electromigration control loops. Disclosed techniques may advantageously reduce or avoid thermal issues, potentially with reduced impact on processor performance relative to traditional techniques.Type: ApplicationFiled: May 18, 2022Publication date: November 23, 2023Inventors: Inder M. Sodhi, Achmed R. Zahir, Carmel Yamberger, Daniele Perretta, Jan Krellner, Ron Neuman, James S. Ismail, Keith Cox
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Patent number: 11809256Abstract: Embodiments are presented herein of, inter alia, systems, devices, and associated methods for allocating and distributing power management budgets for classes of tasks being executed by a computer system, based on thermal feedback loops. Specifically, multiple quality-of-service (QoS) tiers may be defined, and each QoS tier may be allocated power based on a different set of thermal feedback loops. QoS tiers including tasks that are invisible to the user may be mitigated more aggressively than QoS tiers including tasks that are visibly supporting user operations.Type: GrantFiled: November 8, 2021Date of Patent: November 7, 2023Assignee: Apple Inc.Inventors: James S. Ismail, Bryan R. Hinch, Evan M. Hoke, Andrei Dorofeev, Shirin Dadashi, Mohsen Heidarinejad, Reza Arastoo
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Patent number: 11579934Abstract: Systems and methods are disclosed for scheduling threads on a processor that has at least two different core types, such as an asymmetric multiprocessing system. Each core type can run at a plurality of selectable voltage and frequency scaling (DVFS) states. Threads from a plurality of processes can be grouped into thread groups. Execution metrics are accumulated for threads of a thread group and fed into a plurality of tunable controllers for the thread group. A closed loop performance control (CLPC) system determines a control effort for the thread group and maps the control effort to a recommended core type and DVFS state. A closed loop thermal and power management system can limit the control effort determined by the CLPC for a thread group, and limit the power, core type, and DVFS states for the system. Deferred interrupts can be used to increase performance.Type: GrantFiled: March 22, 2021Date of Patent: February 14, 2023Assignee: Apple Inc.Inventors: Jeremy C. Andrus, John G. Dorsey, James M. Magee, Daniel A. Chimene, Cyril de la Cropte de Chanterac, Bryan R. Hinch, Aditya Venkataraman, Andrei Dorofeev, Nigel R. Gamble, Russell A. Blaine, Constantin Pistol, James S. Ismail
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Patent number: 11513585Abstract: In one embodiment, a system includes power management control that controls a duty cycle of a processor to manage power. The duty cycle may be the amount of time that the processor is powered on as a percentage of the total time. By frequently powering up and powering down the processor during a period of time, the power consumption of the processor may be controlled while providing the perception that the processor is continuously available. For example, the processor may be a graphics processing unit (GPU), and the period of time over which the duty cycle is managed may be a frame to be displayed on the display screen viewed by a user of the system.Type: GrantFiled: April 2, 2021Date of Patent: November 29, 2022Assignee: Apple Inc.Inventors: Patrick Y. Law, Robert A. Drebin, Keith Cox, James S. Ismail
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Patent number: 11513576Abstract: Systems and methods are disclosed for allocating and distributing power management budgets for subsystems (e.g., power usage clients) of a computer system. A power budget allocation subsystem may include a plurality of feedback branches having different associated time constants. Power usage clients with slower power response times may be provided power budgets based on a feedback branch having an associated longer time constant, while power usage clients with faster power response times may be provided with power budgets based on a feedback branch having an associated shorter time constant. The power budgets may be determined in the feedback branches based on power budgeting policies weighting the power budget of each subsystem relative to total power mitigation.Type: GrantFiled: June 1, 2020Date of Patent: November 29, 2022Assignee: Apple Inc.Inventors: Achmed R. Zahir, Diwakar N. Tundlam, James S. Ismail, Keith Cox, Reza Arastoo, Douglas A. MacKay, John M. Ananny, Michael Eng
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Publication number: 20220147132Abstract: Embodiments are presented herein of, inter alia, systems, devices, and associated methods for allocating and distributing power management budgets for classes of tasks being executed by a computer system, based on thermal feedback loops. Specifically, multiple quality-of-service (QoS) tiers may be defined, and each QoS tier may be allocated power based on a different set of thermal feedback loops. QoS tiers including tasks that are invisible to the user may be mitigated more aggressively than QoS tiers including tasks that are visibly supporting user operations.Type: ApplicationFiled: November 8, 2021Publication date: May 12, 2022Inventors: James S. Ismail, Bryan R. Hinch, Evan M. Hoke, Andrei Dorofeev, Shirin Dadashi, Mohsen Heidarinejad, Reza Araston
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Publication number: 20210318909Abstract: Systems and methods are disclosed for scheduling threads on a processor that has at least two different core types, such as an asymmetric multiprocessing system. Each core type can run at a plurality of selectable voltage and frequency scaling (DVFS) states. Threads from a plurality of processes can be grouped into thread groups. Execution metrics are accumulated for threads of a thread group and fed into a plurality of tunable controllers for the thread group. A closed loop performance control (CLPC) system determines a control effort for the thread group and maps the control effort to a recommended core type and DVFS state. A closed loop thermal and power management system can limit the control effort determined by the CLPC for a thread group, and limit the power, core type, and DVFS states for the system. Deferred interrupts can be used to increase performance.Type: ApplicationFiled: March 22, 2021Publication date: October 14, 2021Inventors: Jeremy C. Andrus, John G. Dorsey, James M. Magee, Daniel A. Chimene, Cyril de la Cropte de Chanterac, Bryan R. Hinch, Aditya Venkataraman, Andrei Dorofeev, Nigel R. Gamble, Russell A. Blaine, Constantin Pistol, James S. Ismail
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Patent number: 11062673Abstract: The invention provides a technique for targeted scaling of the voltage and/or frequency of a processor included in a computing device. One embodiment involves scaling the voltage/frequency of the processor based on the number of frames per second being input to a frame buffer in order to reduce or eliminate choppiness in animations shown on a display of the computing device. Another embodiment of the invention involves scaling the voltage/frequency of the processor based on a utilization rate of the GPU in order to reduce or eliminate any bottleneck caused by slow issuance of instructions from the CPU to the GPU. Yet another embodiment of the invention involves scaling the voltage/frequency of the CPU based on specific types of instructions being executed by the CPU. Further embodiments include scaling the voltage and/or frequency of a CPU when the CPU executes workloads that have characteristics of traditional desktop/laptop computer applications.Type: GrantFiled: September 30, 2019Date of Patent: July 13, 2021Assignee: Apple Inc.Inventors: John G. Dorsey, James S. Ismail, Keith Cox, Gaurav Kapoor
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Patent number: 11009938Abstract: In one embodiment, a system includes power management control that controls a duty cycle of a processor to manage power. The duty cycle may be the amount of time that the processor is powered on as a percentage of the total time. By frequently powering up and powering down the processor during a period of time, the power consumption of the processor may be controlled while providing the perception that the processor is continuously available. For example, the processor may be a graphics processing unit (GPU), and the period of time over which the duty cycle is managed may be a frame to be displayed on the display screen viewed by a user of the system.Type: GrantFiled: September 24, 2018Date of Patent: May 18, 2021Assignee: Apple Inc.Inventors: Patrick Y. Law, Robert A. Drebin, Keith Cox, James S. Ismail
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Patent number: 10956220Abstract: Systems and methods are disclosed for scheduling threads on a processor that has at least two different core types, such as an asymmetric multiprocessing system. Each core type can run at a plurality of selectable voltage and frequency scaling (DVFS) states. Threads from a plurality of processes can be grouped into thread groups. Execution metrics are accumulated for threads of a thread group and fed into a plurality of tunable controllers for the thread group. A closed loop performance control (CLPC) system determines a control effort for the thread group and maps the control effort to a recommended core type and DVFS state. A closed loop thermal and power management system can limit the control effort determined by the CLPC for a thread group, and limit the power, core type, and DVFS states for the system. Deferred interrupts can be used to increase performance.Type: GrantFiled: January 12, 2018Date of Patent: March 23, 2021Assignee: Apple Inc.Inventors: Jeremy C. Andrus, John G. Dorsey, James M. Magee, Daniel A. Chimene, Cyril de la Cropte de Chanterac, Bryan R. Hinch, Aditya Venkataraman, Andrei Dorofeev, Nigel R. Gamble, Russell A. Blaine, Constantin Pistol, James S. Ismail
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Patent number: 10895903Abstract: In an embodiment, an electronic device includes a package power zone controller. The device monitors the overall power consumption of multiple components of a “package.” The package power zone controller may detect workloads in which the package components (e.g. different types of processors, peripheral hardware, etc.) are each consuming relatively low levels of power, but the overall power consumption is greater than a desired target. The package power zone controller may implement various mechanisms to reduce power consumption in such cases.Type: GrantFiled: February 4, 2019Date of Patent: January 19, 2021Assignee: Apple Inc.Inventors: James S. Ismail, John M. Ananny, John G. Dorsey, Bryan R. Hinch, Aditya Venkataraman, Keith Cox, Inder M. Sodhi, Achmed R. Zahir
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Publication number: 20200379534Abstract: Systems and methods are disclosed for allocating and distributing power management budgets for subsystems (e.g., power usage clients) of a computer system. A power budget allocation subsystem may include a plurality of feedback branches having different associated time constants. Power usage clients with slower power response times may be provided power budgets based on a feedback branch having an associated longer time constant, while power usage clients with faster power response times may be provided with power budgets based on a feedback branch having an associated shorter time constant. The power budgets may be determined in the feedback branches based on power budgeting policies weighting the power budget of each subsystem relative to total power mitigation.Type: ApplicationFiled: June 1, 2020Publication date: December 3, 2020Inventors: Achmed R. Zahir, Diwakar N. Tundlam, James S. Ismail, Keith Cox, Reza Arastoo, Douglas A. MacKay, John M. Ananny, Michael Eng
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Publication number: 20200273424Abstract: The invention provides a technique for targeted scaling of the voltage and/or frequency of a processor included in a computing device. One embodiment involves scaling the voltage/frequency of the processor based on the number of frames per second being input to a frame buffer in order to reduce or eliminate choppiness in animations shown on a display of the computing device. Another embodiment of the invention involves scaling the voltage/frequency of the processor based on a utilization rate of the GPU in order to reduce or eliminate any bottleneck caused by slow issuance of instructions from the CPU to the GPU. Yet another embodiment of the invention involves scaling the voltage/frequency of the CPU based on specific types of instructions being executed by the CPU. Further embodiments include scaling the voltage and/or frequency of a CPU when the CPU executes workloads that have characteristics of traditional desktop/laptop computer applications.Type: ApplicationFiled: September 30, 2019Publication date: August 27, 2020Applicant: Apple Inc.Inventors: John G. Dorsey, James S. Ismail, Keith Cox, Gaurav Kapoor
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Patent number: 10671131Abstract: Systems and methods are disclosed for determining a current machine state of a processing device, predicting a future processing task to be performed by the processing device at a future time, and predicting a list of intervening processing tasks to be performed by a first time (e.g. a current time) and the start of the future processing task. The future processing task has an associated initial state. A feed-forward thermal prediction model determines a predicted future machine state at the time for starting the future processing task. Heat mitigation processes can be applied in advance of the starting of the future processing task, to meet the future initial machine state for starting the future processing task.Type: GrantFiled: September 30, 2015Date of Patent: June 2, 2020Assignee: Apple Inc.Inventors: Nagarajan Kalyanasundaram, Jay S. Nigen, James S. Ismail, Richard H. Tan
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Publication number: 20190369693Abstract: In an embodiment, an electronic device includes a package power zone controller. The device monitors the overall power consumption of multiple components of a “package.” The package power zone controller may detect workloads in which the package components (e.g. different types of processors, peripheral hardware, etc.) are each consuming relatively low levels of power, but the overall power consumption is greater than a desired target. The package power zone controller may implement various mechanisms to reduce power consumption in such cases.Type: ApplicationFiled: February 4, 2019Publication date: December 5, 2019Inventors: James S. Ismail, John M. Ananny, John G. Dorsey, Bryan R. Hinch, Aditya Venkataraman, Keith Cox, Inder M. Sodhi, Achmed R. Zahir
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Patent number: 10431181Abstract: The invention provides a technique for targeted scaling of the voltage and/or frequency of a processor included in a computing device. One embodiment involves scaling the voltage/frequency of the processor based on the number of frames per second being input to a frame buffer in order to reduce or eliminate choppiness in animations shown on a display of the computing device. Another embodiment of the invention involves scaling the voltage/frequency of the processor based on a utilization rate of the GPU in order to reduce or eliminate any bottleneck caused by slow issuance of instructions from the CPU to the GPU. Yet another embodiment of the invention involves scaling the voltage/frequency of the CPU based on specific types of instructions being executed by the CPU. Further embodiments include scaling the voltage and/or frequency of a CPU when the CPU executes workloads that have characteristics of traditional desktop/laptop computer applications.Type: GrantFiled: March 28, 2017Date of Patent: October 1, 2019Assignee: Apple Inc.Inventors: John G. Dorsey, James S. Ismail, Keith Cox, Gaurav Kapoor
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Publication number: 20180349175Abstract: Systems and methods are disclosed for scheduling threads on a processor that has at least two different core types, such as an asymmetric multiprocessing system. Each core type can run at a plurality of selectable voltage and frequency scaling (DVFS) states. Threads from a plurality of processes can be grouped into thread groups. Execution metrics are accumulated for threads of a thread group and fed into a plurality of tunable controllers for the thread group. A closed loop performance control (CLPC) system determines a control effort for the thread group and maps the control effort to a recommended core type and DVFS state. A closed loop thermal and power management system can limit the control effort determined by the CLPC for a thread group, and limit the power, core type, and DVFS states for the system. Deferred interrupts can be used to increase performance.Type: ApplicationFiled: January 12, 2018Publication date: December 6, 2018Inventors: Jeremy C. Andrus, John G. Dorsey, James M. Magee, Daniel A. Chimene, Cyril de la Cropte de Chanterac, Bryan R. Hinch, Aditya Venkataraman, Andrei Dorofeev, Nigel R. Gamble, Russell A. Blaine, Constantin Pistol, James S. Ismail
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Patent number: 10114446Abstract: In one embodiment, a system includes power management control that controls a duty cycle of a processor to manage power. The duty cycle may be the amount of time that the processor is powered on as a percentage of the total time. By frequently powering up and powering down the processor during a period of time, the power consumption of the processor may be controlled while providing the perception that the processor is continuously available. For example, the processor may be a graphics processing unit (GPU), and the period of time over which the duty cycle is managed may be a frame to be displayed on the display screen viewed by a user of the system.Type: GrantFiled: October 4, 2016Date of Patent: October 30, 2018Assignee: Apple Inc.Inventors: Patrick Y. Law, Robert A. Drebin, Keith Cox, James S. Ismail
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Patent number: 10067483Abstract: In an embodiment, a lifetime controller is configured to monitor operating conditions for a device, and to control operating conditions based on the previous conditions to improve the reliability characteristics of the device while permitting strenuous use as available. For example, the lifetime controller may permit strenuous use when the device is first powered on. Once a specified amount of strenuous use has occurred, the controller may cause the operating conditions to be reduced to reduce the wear on the device, and thus help to extend the lifetime of the device. Similarly, if a device is used in less strenuous conditions, the controller may accumulate credit which may be expended by permitting the device to operate in more strenuous conditions for a period of time.Type: GrantFiled: August 28, 2014Date of Patent: September 4, 2018Assignee: Apple Inc.Inventors: Ching E. Ho, Antonietta Oliva, James S. Ismail, John G. Dorsey, Keith Cox, Norman J. Rohrer